Articles | Volume 37, issue 5
https://doi.org/10.5194/angeo-37-851-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-37-851-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
24 Sep 2019
Regular paper |
| 24 Sep 2019
| 24 Sep 2019
Climatologies and long-term changes in mesospheric wind and wave measurements based on radar observations at high and mid latitudes
Sven Wilhelm
CORRESPONDING AUTHOR
Leibniz Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn, Germany
Gunter Stober
Leibniz Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn, Germany
Institute of Applied Physics, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Switzerland
Peter Brown
Department of Physics and Astronomy, Western University, London, Ontario, Canada
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Sven Wilhelm, Gunter Stober, Vivien Matthias, Christoph Jacobi, and Damian J. Murphy
Ann. Geophys., 37, 1–14, https://doi.org/10.5194/angeo-37-1-2019, https://doi.org/10.5194/angeo-37-1-2019, 2019
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This study shows that the mesospheric winds are affected by an expansion–shrinking of the mesosphere and lower thermosphere that takes place due to changes in the intensity of the solar radiation, which affects the density within the atmosphere. On seasonal timescales, an increase in the neutral density occurs together with a decrease in the eastward-directed zonal wind. Further, even after removing the seasonal and the 11-year solar cycle variations, we show a connection between them.
Gunter Stober, Jorge L. Chau, Juha Vierinen, Christoph Jacobi, and Sven Wilhelm
Atmos. Meas. Tech., 11, 4891–4907, https://doi.org/10.5194/amt-11-4891-2018, https://doi.org/10.5194/amt-11-4891-2018, 2018
Sven Wilhelm, Gunter Stober, and Jorge L. Chau
Ann. Geophys., 35, 893–906, https://doi.org/10.5194/angeo-35-893-2017, https://doi.org/10.5194/angeo-35-893-2017, 2017
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A comparison between winds and tides in the mesosphere and lower thermosphere based on measurements from a meteor radar (MR) and a medium-frequency radar in northern Norway was done to estimate potential biases between the two systems. Our results indicate reasonable agreement for the zonal and meridional wind components between 78 and 92 km. Based on these findings, we have taken the MR data as a reference and thus construct a consistent and homogenous wind from approximately 60 to 110 km.
Gunter Stober, Vivien Matthias, Christoph Jacobi, Sven Wilhelm, Josef Höffner, and Jorge L. Chau
Ann. Geophys., 35, 711–720, https://doi.org/10.5194/angeo-35-711-2017, https://doi.org/10.5194/angeo-35-711-2017, 2017
Witali Krochin, Axel Murk, and Gunter Stober
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2024-42, https://doi.org/10.5194/amt-2024-42, 2024
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Atmospheric tides are global-scale oscillations with periods of a fraction of a day. Their observation in the middle atmosphere is challenging and rare, as it requires continuous measurements with a high temporal resolution. In this manuscript, temperature time series of a ground-based microwave radiometer were analyzed with a spectral filter to derive thermal tide amplitudes and phases in an altitude range of 20–50 km at the geographical location of Payerne (Switzerland).
Guochun Shi, Witali Krochin, Eric Sauvageat, and Gunter Stober
EGUsphere, https://doi.org/10.5194/egusphere-2024-65, https://doi.org/10.5194/egusphere-2024-65, 2024
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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In our study, we investigated ozone anomalies over polar regions during SSW and FSW events with ground-based microwave radiometers at polar latitudes, comparing them with reanalysis and satellite data. We document the underlying dynamical and chemical mechanisms that are responsible for the observed ozone anomalies in both events. Our research sheds light on these processes, emphasizing the need for a deeper understanding of these processes for more accurate climate modeling and forecasting.
Florian Günzkofer, Gunter Stober, Dimitry Pokhotelov, Yasunobu Miyoshi, and Claudia Borries
Atmos. Meas. Tech., 16, 5897–5907, https://doi.org/10.5194/amt-16-5897-2023, https://doi.org/10.5194/amt-16-5897-2023, 2023
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Electric currents in the ionosphere can impact both satellite and ground-based infrastructure. These currents depend strongly on the collisions of ions and neutral particles. Measuring ion–neutral collisions is often only possible via certain assumptions. The direct measurement of ion–neutral collision frequencies is possible with multifrequency incoherent scatter radar measurements. This paper presents one analysis method of such measurements and discusses its advantages and disadvantages.
Florian Günzkofer, Dimitry Pokhotelov, Gunter Stober, Ingrid Mann, Sharon L. Vadas, Erich Becker, Anders Tjulin, Alexander Kozlovsky, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, Nicholas J. Mitchell, and Claudia Borries
Ann. Geophys., 41, 409–428, https://doi.org/10.5194/angeo-41-409-2023, https://doi.org/10.5194/angeo-41-409-2023, 2023
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Gravity waves (GWs) are waves in Earth's atmosphere and can be observed as cloud ripples. Under certain conditions, these waves can propagate up into the ionosphere. Here, they can cause ripples in the ionosphere plasma, observable as oscillations of the plasma density. Therefore, GWs contribute to the ionospheric variability, making them relevant for space weather prediction. Additionally, the behavior of these waves allows us to draw conclusions about the atmosphere at these altitudes.
Gunter Stober, Sharon L. Vadas, Erich Becker, Alan Liu, Alexander Kozlovsky, Diego Janches, Zishun Qiao, Witali Krochin, Guochun Shi, Wen Yi, Jie Zeng, Peter Brown, Denis Vida, Neil Hindley, Christoph Jacobi, Damian Murphy, Ricardo Buriti, Vania Andrioli, Paulo Batista, John Marino, Scott Palo, Denise Thorsen, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Kathrin Baumgarten, Johan Kero, Evgenia Belova, Nicholas Mitchell, and Na Li
EGUsphere, https://doi.org/10.5194/egusphere-2023-1714, https://doi.org/10.5194/egusphere-2023-1714, 2023
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On 15th January 2022, the Hunga Tonga-Hunga Ha‘apai volcano exploded in a vigorous eruption causing many atmospheric phenomena reaching from the surface up to space. In this study, we investigate how the mesospheric winds were affected by the volcanic-caused gravity waves and estimated their propagation direction and speed. The interplay between model and observations permits us to gain new insights into the vertical coupling through atmospheric gravity waves.
Guochun Shi, Witali Krochin, Eric Sauvageat, and Gunter Stober
Atmos. Chem. Phys., 23, 9137–9159, https://doi.org/10.5194/acp-23-9137-2023, https://doi.org/10.5194/acp-23-9137-2023, 2023
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We present the interannual and climatological behavior of ozone and water vapor from microwave radiometers in the Arctic.
By defining a virtual conjugate latitude station in the Southern Hemisphere, we investigate altitude-dependent interhemispheric differences and estimate the ascent and descent rates of water vapor in both hemispheres. Ozone and water vapor measurements will create a deeper understanding of the evolution of middle atmospheric ozone and water vapor.
Gunter Stober, Alan Liu, Alexander Kozlovsky, Zishun Qiao, Witali Krochin, Guochun Shi, Johan Kero, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Kathrin Baumgarten, Evgenia Belova, and Nicholas Mitchell
Ann. Geophys., 41, 197–208, https://doi.org/10.5194/angeo-41-197-2023, https://doi.org/10.5194/angeo-41-197-2023, 2023
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The Hunga Tonga–Hunga Ha‘apai volcanic eruption was one of the most vigorous volcanic explosions in the last centuries. The eruption launched many atmospheric waves traveling around the Earth. In this study, we identify these volcanic waves at the edge of space in the mesosphere/lower-thermosphere, leveraging wind observations conducted with multi-static meteor radars in northern Europe and with the Chilean Observation Network De Meteor Radars (CONDOR).
Gunter Stober, Alan Liu, Alexander Kozlovsky, Zishun Qiao, Ales Kuchar, Christoph Jacobi, Chris Meek, Diego Janches, Guiping Liu, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, and Nicholas Mitchell
Atmos. Meas. Tech., 15, 5769–5792, https://doi.org/10.5194/amt-15-5769-2022, https://doi.org/10.5194/amt-15-5769-2022, 2022
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Precise and accurate measurements of vertical winds at the mesosphere and lower thermosphere are rare. Although meteor radars have been used for decades to observe horizontal winds, their ability to derive reliable vertical wind measurements was always questioned. In this article, we provide mathematical concepts to retrieve mathematically and physically consistent solutions, which are compared to the state-of-the-art non-hydrostatic model UA-ICON.
Witali Krochin, Francisco Navas-Guzmán, David Kuhl, Axel Murk, and Gunter Stober
Atmos. Meas. Tech., 15, 2231–2249, https://doi.org/10.5194/amt-15-2231-2022, https://doi.org/10.5194/amt-15-2231-2022, 2022
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This study leverages atmospheric temperature measurements performed with a ground-based radiometer making use of data that was collected during a 4-year observational campaign applying a new retrieval algorithm that improves the maximal altitude range from 45 to 55 km. The measurements are validated against two independent data sets, MERRA2 reanalysis data and the meteorological analysis of NAVGEM-HA.
Sumanta Sarkhel, Gunter Stober, Jorge L. Chau, Steven M. Smith, Christoph Jacobi, Subarna Mondal, Martin G. Mlynczak, and James M. Russell III
Ann. Geophys., 40, 179–190, https://doi.org/10.5194/angeo-40-179-2022, https://doi.org/10.5194/angeo-40-179-2022, 2022
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A rare gravity wave event was observed on the night of 25 April 2017 over northern Germany. An all-sky airglow imager recorded an upward-propagating wave at different altitudes in mesosphere with a prominent wave front above 91 km and faintly observed below. Based on wind and satellite-borne temperature profiles close to the event location, we have found the presence of a leaky thermal duct layer in 85–91 km. The appearance of this duct layer caused the wave amplitudes to diminish below 91 km.
Christoph Jacobi, Friederike Lilienthal, Dmitry Korotyshkin, Evgeny Merzlyakov, and Gunter Stober
Adv. Radio Sci., 19, 185–193, https://doi.org/10.5194/ars-19-185-2021, https://doi.org/10.5194/ars-19-185-2021, 2021
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We compare winds and tidal amplitudes in the upper mesosphere/lower thermosphere region for cases with disturbed and undisturbed geomagnetic conditions. The zonal winds in both the mesosphere and lower thermosphere tend to be weaker during disturbed conditions. The summer equatorward meridional wind jet is weaker for disturbed geomagnetic conditions. The effect of geomagnetic variability on tidal amplitudes, except for the semidiurnal tide, is relatively small.
Gunter Stober, Alexander Kozlovsky, Alan Liu, Zishun Qiao, Masaki Tsutsumi, Chris Hall, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, Patrick J. Espy, Robert E. Hibbins, and Nicholas Mitchell
Atmos. Meas. Tech., 14, 6509–6532, https://doi.org/10.5194/amt-14-6509-2021, https://doi.org/10.5194/amt-14-6509-2021, 2021
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Wind observations at the edge to space, 70–110 km altitude, are challenging. Meteor radars have become a widely used instrument to obtain mean wind profiles above an instrument for these heights. We describe an advanced mathematical concept and present a tomographic analysis using several meteor radars located in Finland, Sweden and Norway, as well as Chile, to derive the three-dimensional flow field. We show an example of a gravity wave decelerating the mean flow.
Gunter Stober, Ales Kuchar, Dimitry Pokhotelov, Huixin Liu, Han-Li Liu, Hauke Schmidt, Christoph Jacobi, Kathrin Baumgarten, Peter Brown, Diego Janches, Damian Murphy, Alexander Kozlovsky, Mark Lester, Evgenia Belova, Johan Kero, and Nicholas Mitchell
Atmos. Chem. Phys., 21, 13855–13902, https://doi.org/10.5194/acp-21-13855-2021, https://doi.org/10.5194/acp-21-13855-2021, 2021
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Little is known about the climate change of wind systems in the mesosphere and lower thermosphere at the edge of space at altitudes from 70–110 km. Meteor radars represent a well-accepted remote sensing technique to measure winds at these altitudes. Here we present a state-of-the-art climatological interhemispheric comparison using continuous and long-lasting observations from worldwide distributed meteor radars from the Arctic to the Antarctic and sophisticated general circulation models.
Gunter Stober, Diego Janches, Vivien Matthias, Dave Fritts, John Marino, Tracy Moffat-Griffin, Kathrin Baumgarten, Wonseok Lee, Damian Murphy, Yong Ha Kim, Nicholas Mitchell, and Scott Palo
Ann. Geophys., 39, 1–29, https://doi.org/10.5194/angeo-39-1-2021, https://doi.org/10.5194/angeo-39-1-2021, 2021
Gunter Stober, Kathrin Baumgarten, John P. McCormack, Peter Brown, and Jerry Czarnecki
Atmos. Chem. Phys., 20, 11979–12010, https://doi.org/10.5194/acp-20-11979-2020, https://doi.org/10.5194/acp-20-11979-2020, 2020
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This paper presents a first cross-comparison of meteor ground-based observations and a meteorological analysis (NAVGEM-HA) to compare a seasonal climatology of winds and temperatures at the mesosphere/lower thermosphere. The validation is insofar unique as we not only compare the mean state but also provide a detailed comparison of the short time variability of atmospheric tidal waves. Our analysis questions previous results claiming the importance of lunar tides.
Leonie Bernet, Elmar Brockmann, Thomas von Clarmann, Niklaus Kämpfer, Emmanuel Mahieu, Christian Mätzler, Gunter Stober, and Klemens Hocke
Atmos. Chem. Phys., 20, 11223–11244, https://doi.org/10.5194/acp-20-11223-2020, https://doi.org/10.5194/acp-20-11223-2020, 2020
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With global warming, water vapour increases in the atmosphere. Water vapour is an important gas because it is a natural greenhouse gas and affects the formation of clouds, rain and snow. How much water vapour increases can vary in different regions of the world. To verify if it increases as expected on a regional scale, we analysed water vapour measurements in Switzerland. We found that water vapour generally increases as expected from temperature changes, except in winter.
Franziska Schranz, Jonas Hagen, Gunter Stober, Klemens Hocke, Axel Murk, and Niklaus Kämpfer
Atmos. Chem. Phys., 20, 10791–10806, https://doi.org/10.5194/acp-20-10791-2020, https://doi.org/10.5194/acp-20-10791-2020, 2020
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We measured middle-atmospheric ozone, water vapour and zonal and meridional wind with two ground-based microwave radiometers which are located at Ny-Alesund, Svalbard, in the Arctic. In this article we present measurements of the small-scale horizontal ozone gradients during winter 2018/2019. We found a distinct seasonal variation of the ozone gradients which is linked to the planetary wave activity. We further present the signatures of the SSW in the ozone, water vapour and wind measurements.
Jonas Hagen, Klemens Hocke, Gunter Stober, Simon Pfreundschuh, Axel Murk, and Niklaus Kämpfer
Atmos. Chem. Phys., 20, 2367–2386, https://doi.org/10.5194/acp-20-2367-2020, https://doi.org/10.5194/acp-20-2367-2020, 2020
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The middle atmosphere (30 to 70 km altitude) is stratified and, despite very strong horizontal winds, there is less mixing between the horizontal layers. An important driver for the energy exchange between the layers in this regime is atmospheric tides, which are waves that are driven by the diurnal cycle of solar heating. We measure these tides in the wind field for the first time using a ground-based passive instrument. Ultimately, such measurements could be used to improve atmospheric models.
Kathrin Baumgarten and Gunter Stober
Ann. Geophys., 37, 581–602, https://doi.org/10.5194/angeo-37-581-2019, https://doi.org/10.5194/angeo-37-581-2019, 2019
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The paper presents the variability in thermal tides in the middle atmosphere from temperature observations as well as from horizontal wind data using a new diagnostic approach which takes into account a possible intermittency of tides. The data are analyzed from a local as well as from a global perspective to distinguish between different tidal modes. Surprisingly, there are dominating tidal modes, which are seen in the local data, and a phase relation between temperature and winds is evaluated.
Dimitry Pokhotelov, Gunter Stober, and Jorge Luis Chau
Atmos. Chem. Phys., 19, 5251–5258, https://doi.org/10.5194/acp-19-5251-2019, https://doi.org/10.5194/acp-19-5251-2019, 2019
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Twelve years of radar observations from a mid-latitude location in Kühlungsborn, Germany have been analysed to study characteristics of mesospheric summer echoes (MSEs). The statistical analysis shows that MSEs have a strong daytime preference and early summer seasonal preference. It is demonstrated that the meridional wind transport from polar regions is the important controlling factor for MSEs, while no clear connection to geomagnetic and solar activity is found.
Fazlul I. Laskar, Gunter Stober, Jens Fiedler, Meers M. Oppenheim, Jorge L. Chau, Duggirala Pallamraju, Nicholas M. Pedatella, Masaki Tsutsumi, and Toralf Renkwitz
Atmos. Chem. Phys., 19, 5259–5267, https://doi.org/10.5194/acp-19-5259-2019, https://doi.org/10.5194/acp-19-5259-2019, 2019
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Meteor radars are used to track and estimate the fading time of meteor trails. In this investigation, it is observed that the diffusion time estimated from such trail fading time is anomalously higher during noctilucent clouds (NLC) than that in its absence. We propose that NLC particles absorb background electrons and thus modify the background electrodynamics, leading to such an anomaly.
Nikoloz Gudadze, Gunter Stober, and Jorge L. Chau
Atmos. Chem. Phys., 19, 4485–4497, https://doi.org/10.5194/acp-19-4485-2019, https://doi.org/10.5194/acp-19-4485-2019, 2019
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We show a possibility of measuring mean vertical winds during the summer months using polar mesosphere summer echo (PMSE) observations. Middle Atmosphere Alomar Radar System observations of PMSE five-beam radial velocities are analysed to obtain the results. We found that sampling issues are the reason for bias in vertical wind measurements at the edges of PMSE altitudes. However, the PMSE is a good tracer for the mean vertical wind estimation at the central altitudes with its peak occurrence.
Sven Wilhelm, Gunter Stober, Vivien Matthias, Christoph Jacobi, and Damian J. Murphy
Ann. Geophys., 37, 1–14, https://doi.org/10.5194/angeo-37-1-2019, https://doi.org/10.5194/angeo-37-1-2019, 2019
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This study shows that the mesospheric winds are affected by an expansion–shrinking of the mesosphere and lower thermosphere that takes place due to changes in the intensity of the solar radiation, which affects the density within the atmosphere. On seasonal timescales, an increase in the neutral density occurs together with a decrease in the eastward-directed zonal wind. Further, even after removing the seasonal and the 11-year solar cycle variations, we show a connection between them.
Michael Gerding, Jochen Zöllner, Marius Zecha, Kathrin Baumgarten, Josef Höffner, Gunter Stober, and Franz-Josef Lübken
Atmos. Chem. Phys., 18, 15569–15580, https://doi.org/10.5194/acp-18-15569-2018, https://doi.org/10.5194/acp-18-15569-2018, 2018
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We describe the first comparative study of noctilucent clouds (NLCs) and mesospheric summer echoes at midlatitudes. Therefore, this study compares fresh clouds (small particles) with fully evolved clouds in the mesosphere, hinting at their evolution. It is shown that, in contrast to higher latitudes, here only a thin layer of fresh particles exist above the NLCs. This gives evidence that NLCs are not formed locally but are typically advected. This needs to be acknowledged in trend studies.
Gunter Stober, Jorge L. Chau, Juha Vierinen, Christoph Jacobi, and Sven Wilhelm
Atmos. Meas. Tech., 11, 4891–4907, https://doi.org/10.5194/amt-11-4891-2018, https://doi.org/10.5194/amt-11-4891-2018, 2018
J. Federico Conte, Jorge L. Chau, Fazlul I. Laskar, Gunter Stober, Hauke Schmidt, and Peter Brown
Ann. Geophys., 36, 999–1008, https://doi.org/10.5194/angeo-36-999-2018, https://doi.org/10.5194/angeo-36-999-2018, 2018
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Based on comparisons of meteor radar measurements with HAMMONIA model simulations, we show that the differences exhibited by the semidiurnal solar tide (S2) observed at middle and high latitudes of the Northern Hemisphere between equinox times are mainly due to distinct behaviors of the migrating semidiurnal (SW2) and the non-migrating westward-propagating wave number 1 semidiurnal (SW1) tidal components.
Dimitry Pokhotelov, Erich Becker, Gunter Stober, and Jorge L. Chau
Ann. Geophys., 36, 825–830, https://doi.org/10.5194/angeo-36-825-2018, https://doi.org/10.5194/angeo-36-825-2018, 2018
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Atmospheric tides are produced by solar heating of the lower atmosphere. The tides propagate to the upper atmosphere and ionosphere playing an important role in the vertical coupling. Ground radar measurements of the seasonal variability of tides are compared with global numerical simulations. The agreement with radar data and limitations of the numerical model are discussed. The work represents a first step in modelling the impact of tidal dynamics on the upper atmosphere and ionosphere.
Sabine Wüst, Thomas Offenwanger, Carsten Schmidt, Michael Bittner, Christoph Jacobi, Gunter Stober, Jeng-Hwa Yee, Martin G. Mlynczak, and James M. Russell III
Atmos. Meas. Tech., 11, 2937–2947, https://doi.org/10.5194/amt-11-2937-2018, https://doi.org/10.5194/amt-11-2937-2018, 2018
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OH*-spectrometer measurements allow the analysis of gravity wave ground-based periods, but spatial information cannot necessarily be deduced. We combine the approach of Wachter at al. (2015) in order to derive horizontal wavelengths (but based on only one OH* spectrometer) with additional information about wind and temperature and compute vertical wavelengths. Knowledge of these parameters is a precondition for the calculation of further information such as the wave group velocity.
Gunter Stober, Svenja Sommer, Carsten Schult, Ralph Latteck, and Jorge L. Chau
Atmos. Chem. Phys., 18, 6721–6732, https://doi.org/10.5194/acp-18-6721-2018, https://doi.org/10.5194/acp-18-6721-2018, 2018
Rolf Rüfenacht, Gerd Baumgarten, Jens Hildebrand, Franziska Schranz, Vivien Matthias, Gunter Stober, Franz-Josef Lübken, and Niklaus Kämpfer
Atmos. Meas. Tech., 11, 1971–1987, https://doi.org/10.5194/amt-11-1971-2018, https://doi.org/10.5194/amt-11-1971-2018, 2018
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Wind information throughout the middle-atmosphere is crucial for the understanding of atmospheric dynamics but became available only recently, thanks to developments in remote sensing and modelling approaches. We present the first thorough assessment of the quality of the wind estimates by comparing co-located observations from lidar and microwave radiometry and opposing them to the major atmospheric models. Moreover we evaluated a new approach for measuring mesopause region wind by radiometry.
Qiang Li, Markus Rapp, Gunter Stober, and Ralph Latteck
Ann. Geophys., 36, 577–586, https://doi.org/10.5194/angeo-36-577-2018, https://doi.org/10.5194/angeo-36-577-2018, 2018
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With the powerful MAARSY radar, we detected 3D wind fields and the vertical winds show a non-Gaussian distribution. We further obtained the frequency spectrum of vertical wind. The distribution of the spectral slopes under different wind conditions is derived and their comparisons with the background horizontal winds show that the spectra become steeper with increasing wind velocities under quiet conditions, approach a slope of −5/3 at 10 m/s and then maintain this slope for even stronger winds.
Sven Wilhelm, Gunter Stober, and Jorge L. Chau
Ann. Geophys., 35, 893–906, https://doi.org/10.5194/angeo-35-893-2017, https://doi.org/10.5194/angeo-35-893-2017, 2017
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A comparison between winds and tides in the mesosphere and lower thermosphere based on measurements from a meteor radar (MR) and a medium-frequency radar in northern Norway was done to estimate potential biases between the two systems. Our results indicate reasonable agreement for the zonal and meridional wind components between 78 and 92 km. Based on these findings, we have taken the MR data as a reference and thus construct a consistent and homogenous wind from approximately 60 to 110 km.
Gunter Stober, Vivien Matthias, Christoph Jacobi, Sven Wilhelm, Josef Höffner, and Jorge L. Chau
Ann. Geophys., 35, 711–720, https://doi.org/10.5194/angeo-35-711-2017, https://doi.org/10.5194/angeo-35-711-2017, 2017
Qiang Li, Markus Rapp, Anne Schrön, Andreas Schneider, and Gunter Stober
Ann. Geophys., 34, 1209–1229, https://doi.org/10.5194/angeo-34-1209-2016, https://doi.org/10.5194/angeo-34-1209-2016, 2016
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Turbulence is an essential process in the atmosphere and ocean. Clear-air turbulence is a well-known threat for the safety of aviation. Using a powerful MST radar, we detected turbulence and compared it with the results from radiosondes. The correlation between turbulence and background conditions, e.g., Richardson number and wind shears, is determined. There is a nearly negative correlation between turbulence and Richardson number independent of the length scale over which it was calculated.
Ch. Jacobi, N. Samtleben, and G. Stober
Adv. Radio Sci., 14, 169–174, https://doi.org/10.5194/ars-14-169-2016, https://doi.org/10.5194/ars-14-169-2016, 2016
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VHF meteor radar observations of mesosphere/lower thermosphere daily temperatures have been performed at Collm, Germany. The data have been analyzed with respect to long-period oscillations at time scales of 2 to 30 days. The results reveal that oscillations with periods of up to 6 days are more frequently observed during summer, while those with longer periods have larger amplitudes during winter. The results are comparable with analyses from radar wind measurements.
Juha Vierinen, Jorge L. Chau, Nico Pfeffer, Matthias Clahsen, and Gunter Stober
Atmos. Meas. Tech., 9, 829–839, https://doi.org/10.5194/amt-9-829-2016, https://doi.org/10.5194/amt-9-829-2016, 2016
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This paper describes the use of pseudorandom coded continuous wave radar transmissions for meteor radar. This avoids range-aliased echoes, maximizes pulse compression gain, is less susceptible to RFI, allows time resolution to be changed flexibly, and enables multiple transmitters to operate on the same frequency without interfering each other. These features make the radar well suited for multi-static meteor radar networks. We show results from a measurement campaign to demonstrate the method.
T. Renkwitz, C. Schult, R. Latteck, and G. Stober
Adv. Radio Sci., 13, 41–48, https://doi.org/10.5194/ars-13-41-2015, https://doi.org/10.5194/ars-13-41-2015, 2015
S. Sommer, G. Stober, J. L. Chau, and R. Latteck
Adv. Radio Sci., 12, 197–203, https://doi.org/10.5194/ars-12-197-2014, https://doi.org/10.5194/ars-12-197-2014, 2014
G. Stober, S. Sommer, M. Rapp, and R. Latteck
Atmos. Meas. Tech., 6, 2893–2905, https://doi.org/10.5194/amt-6-2893-2013, https://doi.org/10.5194/amt-6-2893-2013, 2013
C. Schult, G. Stober, J. L. Chau, and R. Latteck
Ann. Geophys., 31, 1843–1851, https://doi.org/10.5194/angeo-31-1843-2013, https://doi.org/10.5194/angeo-31-1843-2013, 2013
V. Matthias, P. Hoffmann, A. Manson, C. Meek, G. Stober, P. Brown, and M. Rapp
Ann. Geophys., 31, 1397–1415, https://doi.org/10.5194/angeo-31-1397-2013, https://doi.org/10.5194/angeo-31-1397-2013, 2013
G. Stober, C. Schult, C. Baumann, R. Latteck, and M. Rapp
Ann. Geophys., 31, 473–487, https://doi.org/10.5194/angeo-31-473-2013, https://doi.org/10.5194/angeo-31-473-2013, 2013
T. Dunker, U.-P. Hoppe, G. Stober, and M. Rapp
Ann. Geophys., 31, 61–73, https://doi.org/10.5194/angeo-31-61-2013, https://doi.org/10.5194/angeo-31-61-2013, 2013
M. Rapp, J. M. C. Plane, B. Strelnikov, G. Stober, S. Ernst, J. Hedin, M. Friedrich, and U.-P. Hoppe
Ann. Geophys., 30, 1661–1673, https://doi.org/10.5194/angeo-30-1661-2012, https://doi.org/10.5194/angeo-30-1661-2012, 2012
Related subject area
Subject: Earth's ionosphere & aeronomy | Keywords: Waves and tides
High-time-resolution analysis of meridional tides in the upper mesosphere and lower thermosphere at mid-latitudes measured by the Falkland Islands SuperDARN radar
Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster
A case study of a ducted gravity wave event over northern Germany using simultaneous airglow imaging and wind-field observations
Seasonal evolution of winds, atmospheric tides, and Reynolds stress components in the Southern Hemisphere mesosphere–lower thermosphere in 2019
Migrating tide climatologies measured by a high-latitude array of SuperDARN HF radars
Diurnal mesospheric tidal winds observed simultaneously by meteor radars in Costa Rica (10° N, 86° W) and Brazil (7° S, 37° W)
Forcing mechanisms of the migrating quarterdiurnal tide
Investigation of sources of gravity waves observed in the Brazilian equatorial region on 8 April 2005
Characterization of gravity waves in the lower ionosphere using very low frequency observations at Comandante Ferraz Brazilian Antarctic Station
Impact of gravity wave drag on the thermospheric circulation: implementation of a nonlinear gravity wave parameterization in a whole-atmosphere model
Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation
Comparison of gravity wave propagation directions observed by mesospheric airglow imaging at three different latitudes using the M-transform
Seasonal variability of atmospheric tides in the mesosphere and lower thermosphere: meteor radar data and simulations
Gareth Chisham, Andrew J. Kavanagh, Neil Cobbett, Paul Breen, and Tim Barnes
Ann. Geophys., 42, 1–15, https://doi.org/10.5194/angeo-42-1-2024, https://doi.org/10.5194/angeo-42-1-2024, 2024
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Solar tides in the atmosphere are driven by solar heating on the dayside of the Earth. They result in large-scale periodic motion of the upper atmosphere. This motion can be measured by ground-based radars. This paper shows that making measurements at a higher time resolution than the standard operation provides a better description of higher-frequency tidal variations. This will improve the inputs to empirical atmospheric models and the benefits of data assimilation.
Gunter Stober, Alan Liu, Alexander Kozlovsky, Zishun Qiao, Witali Krochin, Guochun Shi, Johan Kero, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Kathrin Baumgarten, Evgenia Belova, and Nicholas Mitchell
Ann. Geophys., 41, 197–208, https://doi.org/10.5194/angeo-41-197-2023, https://doi.org/10.5194/angeo-41-197-2023, 2023
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The Hunga Tonga–Hunga Ha‘apai volcanic eruption was one of the most vigorous volcanic explosions in the last centuries. The eruption launched many atmospheric waves traveling around the Earth. In this study, we identify these volcanic waves at the edge of space in the mesosphere/lower-thermosphere, leveraging wind observations conducted with multi-static meteor radars in northern Europe and with the Chilean Observation Network De Meteor Radars (CONDOR).
Sumanta Sarkhel, Gunter Stober, Jorge L. Chau, Steven M. Smith, Christoph Jacobi, Subarna Mondal, Martin G. Mlynczak, and James M. Russell III
Ann. Geophys., 40, 179–190, https://doi.org/10.5194/angeo-40-179-2022, https://doi.org/10.5194/angeo-40-179-2022, 2022
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A rare gravity wave event was observed on the night of 25 April 2017 over northern Germany. An all-sky airglow imager recorded an upward-propagating wave at different altitudes in mesosphere with a prominent wave front above 91 km and faintly observed below. Based on wind and satellite-borne temperature profiles close to the event location, we have found the presence of a leaky thermal duct layer in 85–91 km. The appearance of this duct layer caused the wave amplitudes to diminish below 91 km.
Gunter Stober, Diego Janches, Vivien Matthias, Dave Fritts, John Marino, Tracy Moffat-Griffin, Kathrin Baumgarten, Wonseok Lee, Damian Murphy, Yong Ha Kim, Nicholas Mitchell, and Scott Palo
Ann. Geophys., 39, 1–29, https://doi.org/10.5194/angeo-39-1-2021, https://doi.org/10.5194/angeo-39-1-2021, 2021
Willem E. van Caspel, Patrick J. Espy, Robert E. Hibbins, and John P. McCormack
Ann. Geophys., 38, 1257–1265, https://doi.org/10.5194/angeo-38-1257-2020, https://doi.org/10.5194/angeo-38-1257-2020, 2020
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Global-scale wind measurements from the upper regions of the atmosphere are used to isolate those atmospheric waves that follow the apparent motion of the sun over the course of a day. We present 16 years of near-continuous measurements, demonstrating the unique capabilities of the array of high-latitude SuperDARN radars. The validation steps outlined in our work also provide a methodology for future studies using wind measurements from the (expanding) network of SuperDARN radars.
Ricardo A. Buriti, Wayne Hocking, Paulo P. Batista, Igo Paulino, Ana R. Paulino, Marcial Garbanzo-Salas, Barclay Clemesha, and Amauri F. Medeiros
Ann. Geophys., 38, 1247–1256, https://doi.org/10.5194/angeo-38-1247-2020, https://doi.org/10.5194/angeo-38-1247-2020, 2020
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Solar atmospheric tides are natural oscillations of 24, 12, 8... hours that contribute to the circulation of the atmosphere from low to high altitudes. The Sun heats the atmosphere periodically because, mainly, water vapor and ozone absorb solar radiation between the ground and 50 km height during the day. Tides propagate upward and they can be observed in, for example, the wind field. This work presents diurnal tides observed by meteor radars which measure wind between 80 and 100 km height.
Christoph Geißler, Christoph Jacobi, and Friederike Lilienthal
Ann. Geophys., 38, 527–544, https://doi.org/10.5194/angeo-38-527-2020, https://doi.org/10.5194/angeo-38-527-2020, 2020
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This is an extensive model study to analyze the migrating quarterdiurnal solar tide (QDT) and its forcing mechanisms in the middle atmosphere. We first show a climatology of the QDT amplitudes and examine the contribution of the different forcing mechanisms, including direct solar, nonlinear and gravity wave forcing, on the QDT amplitude. We then investigate the destructive interference between the individual forcing mechanisms.
Oluwakemi Dare-Idowu, Igo Paulino, Cosme A. O. B. Figueiredo, Amauri F. Medeiros, Ricardo A. Buriti, Ana Roberta Paulino, and Cristiano M. Wrasse
Ann. Geophys., 38, 507–516, https://doi.org/10.5194/angeo-38-507-2020, https://doi.org/10.5194/angeo-38-507-2020, 2020
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Some strong gravity wave activity occurred and was observed on 8 April 2005. This work reports the spectral characteristics of these waves using OH airglow images captured by the all-sky imager installed at São João do Cariri (7.4° S, 36.5° W). A preferential propagation direction was observed due to the positioning of the source and also due to the wind filtering effect. Furthermore, the source of these waves was identified by performing reverse-ray tracing analysis.
Emilia Correia, Luis Tiago Medeiros Raunheitte, José Valentin Bageston, and Dino Enrico D'Amico
Ann. Geophys., 38, 385–394, https://doi.org/10.5194/angeo-38-385-2020, https://doi.org/10.5194/angeo-38-385-2020, 2020
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Here the investigation of gravity wave (GW) properties in the low ionosphere using very low frequency (VLF) radio signals is presented. The VLF technique is a powerful tool to obtain the wave period and duration of GW events in the low ionosphere. It can be used independent of sky conditions, during daytime and year-round, which is an advantage in comparison with airglow all-sky imagers.
Yasunobu Miyoshi and Erdal Yiğit
Ann. Geophys., 37, 955–969, https://doi.org/10.5194/angeo-37-955-2019, https://doi.org/10.5194/angeo-37-955-2019, 2019
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Our numerical simulation shows that the drag due to the dissipation and/or breaking of the gravity wave plays an important role in the general circulation in the thermosphere. This means that the parameterization for the gravity wave drag is necessary for numerical simulation in the thermosphere.
Friederike Lilienthal and Christoph Jacobi
Ann. Geophys., 37, 943–953, https://doi.org/10.5194/angeo-37-943-2019, https://doi.org/10.5194/angeo-37-943-2019, 2019
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We analyzed the forcing mechanisms of the migrating terdiurnal solar tide in the middle atmosphere, focusing the impact on the zonal mean circulation. We show that the primary solar forcing is the most dominant one but secondary wave–wave interactions also contribute in the lower thermosphere region. We further demonstrate that small-scale gravity waves can strongly and irregularly influence the amplitude of the terdiurnal tide as well as the background circulation in the thermosphere.
Septi Perwitasari, Takuji Nakamura, Masaru Kogure, Yoshihiro Tomikawa, Mitsumu K. Ejiri, and Kazuo Shiokawa
Ann. Geophys., 36, 1597–1605, https://doi.org/10.5194/angeo-36-1597-2018, https://doi.org/10.5194/angeo-36-1597-2018, 2018
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We have developed a user-friendly program that can efficiently deal with extensive amounts of airglow data. We have applied this new program to airglow data obtained at different latitudes in polar, midlatitude, and equatorial regions and demonstrated distinct differences in atmospheric gravity wave (AGW) propagation characteristics and energy distribution. We aim to encourage other AGW research groups to use the program and do comparisons to reveal AGW characteristics on a more global scale.
Dimitry Pokhotelov, Erich Becker, Gunter Stober, and Jorge L. Chau
Ann. Geophys., 36, 825–830, https://doi.org/10.5194/angeo-36-825-2018, https://doi.org/10.5194/angeo-36-825-2018, 2018
Short summary
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Atmospheric tides are produced by solar heating of the lower atmosphere. The tides propagate to the upper atmosphere and ionosphere playing an important role in the vertical coupling. Ground radar measurements of the seasonal variability of tides are compared with global numerical simulations. The agreement with radar data and limitations of the numerical model are discussed. The work represents a first step in modelling the impact of tidal dynamics on the upper atmosphere and ionosphere.
Cited articles
Baumgarten, K. and Stober, G.: On the evaluation of the phase relation between temperature and wind tides based on ground-based measurements and reanalysis data in the middle atmosphere, Ann. Geophys., 37, 581–602, https://doi.org/10.5194/angeo-37-581-2019, 2019. a
Baumgarten, K., Gerding, M., Baumgarten, G., and Lübken, F.-J.: Temporal variability of tidal and gravity waves during a record long 10-day continuous lidar sounding, Atmos. Chem. Phys., 18, 371–384, https://doi.org/10.5194/acp-18-371-2018, 2018. a, b
Becker, E.: Dynamical Control of the Middle Atmosphere, Space Sci. Rev.,
168, 283–314, https://doi.org/10.1007/s11214-011-9841-5, 2012. a
Beig, G.: Long-term trends in the temperature of the mesosphere/lower
thermosphere region: 1. Anthropogenic influences, J. Geophys.
Res., 116, A00H11, 2011. a
Brown, P., Weryk, R., Wong, D., and Jones, J.: A meteoroid stream survey using
the Canadian Meteor Orbit Radar: I. Methodology and radiant catalogue,
Icarus, 195, 317–339, https://doi.org/10.1016/j.icarus.2007.12.002,
2008. a
Chau, J. L., Hoffmann, P., Pedatella, N. M., Matthias, V., and Stober, G.:
Upper mesospheric lunar tides over middle and high latitudes during sudden
stratospheric warming events, J. Geophys. Res.-Space Phy.,
120, 3084–3096, https://doi.org/10.1002/2015JA020998,
2015. a
Conte, J. F., Chau, J. L., Stober, G., Pedatella, N., Maute, A., Hoffmann, P.,
Janches, D., Fritts, D., and Murphy, D. J.: Climatology of semidiurnal lunar
and solar tides at middle and high latitudes: Interhemispheric comparison,
J. Geophys. Res.-Space Phy., 122, 7750–7760,
https://doi.org/10.1002/2017JA024396,
2017. a
Conte, J. F., Chau, J. L., Laskar, F. I., Stober, G., Schmidt, H., and Brown, P.: Semidiurnal solar tide differences between fall and spring transition times in the Northern Hemisphere, Ann. Geophys., 36, 999–1008, https://doi.org/10.5194/angeo-36-999-2018, 2018. a
Dowdy, A., Vincent, R. A., Tsutsumi, M., Igarashi, K., Murayama, Y., Singer,
W., and Murphy, D. J.: Polar mesosphere and lower thermosphere dynamics: 1.
Mean wind and gravity wave climatologies, J. Geophys. Res.-Atmos., 112, D17104,
https://doi.org/10.1029/2006JD008126, 2007. a
Eckermann, S. D., Broutman, D., Ma, J., Doyle, J. D., Pautet, P. D., Taylor,
M. J., Bossert, K., Williams, B. P., Fritts, D. C., and Smith, R. B.:
Dynamics of Orographic Gravity Waves Observed in the Mesosphere over the
Auckland Islands during the Deep Propagation Gravity Wave Experiment
(DEEPWAVE), J. Atmos. Sci., 73, 3855–3876,
https://doi.org/10.1175/JAS-D-16-0059.1, 2016. a
Egito, F., Andrioli, V., and Batista, P.: Vertical winds and momentum fluxes
due to equatorial planetary scale waves using all-sky meteor radar over
Brazilian region, J. Atmos. Solar-Terr. Phy.,
149, 108–119, https://doi.org/10.1016/j.jastp.2016.10.005,
2016. a
Emmert, J. T., Picone, J. M., and Meier, R. R.: Thermospheric global average
density trends, 1967–2007, derived from oorbit of 5000 near-Earth objects,
Geophys. Res. Lett., 35, L05101, https://doi.org/10.1029/2007GL032809, 2008. a
Fritts, D. C. and Alexander, M. J.: Gravity wave dynamics and effects in the middle atmosphere, Rev. Geophys., 41, 1003,
https://doi.org/10.1029/2001RG000106, 2003. a, b
Fritts, D. C. and VanZandt, T. E.: Spectral Estimates of Gravity Wave Energy
and Momentum Fluxes. Part I: Energy Dissipation, Acceleration, and
Constraint., J. Atmos. Sci., 50, 3685–3694,
https://doi.org/10.1175/1520-0469(1993)050<3685:SEOGWE>2.0.CO;2,
1993. a
Fuller-Rowell, T. J., Fang, T.-W., Wang, H., Matthias, V., Hoffmann, P., Hocke,
K., and Studer, S.: Impact of Migrating Tides on Electrodynamics During the
January 2009 Sudden Stratospheric Warming, chap. 14, pp. 163–174, American
Geophysical Union (AGU), https://doi.org/10.1002/9781118929216.ch14,
2016. a
Hagan, M. E. and Forbes, J. M.: Migrating and nonmigrating diurnal tides in the
middle and upper Atmosphere excited by tropospheric latent heat release,
J. Geophys. Res., 107, 4754, https://doi.org/10.1029/2001JD001236, 2002. a
Hocking, W. K., Fuller, B., and Vandepeer, B.: Realtime determination of
meteor-related parameters utilizing modern digital technology, J. Atmos. Solar-Terr. Phy., 69, 155–169,
https://doi.org/10.1016/S1364-6826(00)00138-3, 2001. a
Hoffmann, P., Becker, E., Singer, W., and Placke, M.: Seasonal variation of
mesospheric waves at northern middle and high latitudes, J. Atmos. Solar-Terr. Phy., 72, 1068–1079,
https://doi.org/10.1016/j.jastp.2010.07.002, 2010. a, b
Hoffmann, P., Rapp, M., Singer, W., and Keuer, D.: Trends of mesospheric
gravity waves at northern middle latitudes during summer, J. Geophys. Res., 116, D00P08, https://doi.org/10.1029/2011JD015717, 2011. a, b, c
Hysell, D., Fritts, D., Laughman, B., and Chau, J. L.: Gravity Wave-Induced
Ionospheric Irregularities in the Postsunset Equatorial Valley Region,
J. Geophys. Res., 122, 579–590,
https://doi.org/10.1002/2017JA024514, 2017. a
Iimura, H., Fritts, D. C., Tsutsumi, M., Nakamura, T., Hoffmann, P., and
Singer, W.: Long-term observations of the wind field in the Antarctic and
Arctic mesosphere and lower-thermosphere at conjugate latitudes, J. Geophys. Res., 116, D20112, https://doi.org/10.1029/2011JD016003, 2011. a, b
Iimura, H., Fritts, D. C., Janches, D., Singer, W., and Mitchell, N. J.: Interhemispheric structure and variability of the 5-day planetary wave from meteor radar wind measurements, Ann. Geophys., 33, 1349–1359, https://doi.org/10.5194/angeo-33-1349-2015, 2015. a
Jacobi, Ch., Hoffmann, P., and Kürschner, D.: Trends in MLT region winds and planetary waves, Collm (52∘ N, 15∘ E), Ann. Geophys., 26, 1221–1232, https://doi.org/10.5194/angeo-26-1221-2008, 2008. a
Jacobi, C., Fröhlich, K., Portnyagin, Y., Merzlyakov, E., Solovjova, T.,
Makarov, N., Rees, D., Fahrutdinova, A., Guryanov, V., Fedorov, D.,
Korotyshkin, D., Forbes, J., Pogoreltsev, A., and Kürschner, D.:
Semi-empirical model of middle atmosphere wind from the ground to the lower
thermosphere, Adv. Space Res., 43, 239–246, 2009. a
Jacobi, C., Lilienthal, F., Geißler, C., and Krug, A.: Long-term variability
of mid-latitude mesosphere-lower thermosphere winds over Collm (51 N, 13 E),
J. Atmos. Solar-Terr. Phy., 136, 174–186,
https://doi.org/10.1016/j.jastp.2015.05.006, 2015. a, b, c
Jones, J., Brown, P., Ellis, K., Webster, A., Campbell-Brown, M., Krzemenski,
Z., and Weryk, R.: The Canadian Meteor Orbit Radar: system overview and
preliminary results, Planet. Space Sci., 53, 413–421,
https://doi.org/10.1016/j.pss.2004.11.002,
2005. a
Keuer, D., Hoffmann, P., Singer, W., and Bremer, J.: Long-term variations of the mesospheric wind field at mid-latitudes, Ann. Geophys., 25, 1779–1790, https://doi.org/10.5194/angeo-25-1779-2007, 2007. a, b, c
Kishore Kumar, G. and Hocking, W. K.: Climatology of northern polar latitude MLT dynamics: mean winds and tides, Ann. Geophys., 28, 1859–1876, https://doi.org/10.5194/angeo-28-1859-2010, 2010. a
Las̆tovic̆ka, J., Solomon, S. C., and Qian, L.: Trends in the Neutral
and Ionized Upper Atmosphere, Space Sci. Rev., 168, 113–145,
https://doi.org/10.1007/s11214-011-9799-3, 2012. a
Latteck, R., Singer, W., Morris, R. J., Hocking, W. K., Murphy, D. J., Holdsworth, D. A., and Swarnalingam, N.: Similarities and differences in polar mesosphere summer echoes observed in the Arctic and Antarctica, Ann. Geophys., 26, 2795–2806, https://doi.org/10.5194/angeo-26-2795-2008, 2008. a
Lieberman, R. S. and Hays, P. B.: An estimate of the momentum deposition in the
lower thermosphere by the observed diurnal tide., J. Atmos.
Sci., 51, 3094–3105,
https://doi.org/10.1175/1520-0469(1994)051<3094:AEOTMD>2.0.CO;2,
1994. a
Lindzen, R. S. and Chapman, S.: Atmospheric tides, Space Sci. Rev., 10,
3–188, https://doi.org/10.1007/BF00171584, 1969. a
Lu, H., Gray, L. J., White, I. P., and Bracegirdle, T. J.: Stratospheric
Response to the 11-Yr Solar Cycle: Breaking Planetary Waves, Internal
Reflection, and Resonance, J. Climate, 30, 7169–7190,
https://doi.org/10.1175/JCLI-D-17-0023.1, 2017. a
Lukianova, R., Kozlovsky, A., and Lester, M.: Climatology and inter-annual
variability of the polar mesospheric winds inferred from meteor radar
observations over Sodankylä (67 N, 23 E) during solar cycle 24, J.
Atmos. Solar-Terr. Phy., 171, 241–249,
https://doi.org/10.1016/j.jastp.2017.06.005, 2018. a
Manson, A. H., Meek, C. E., Chshyolkova, T., Xu, X., Aso, T., Drummond, J. R., Hall, C. M., Hocking, W. K., Jacobi, Ch., Tsutsumi, M., and Ward, W. E.: Arctic tidal characteristics at Eureka (80∘ N, 86∘ W) and Svalbard (78∘ N, 16∘ E) for 2006/07: seasonal and longitudinal variations, migrating and non-migrating tides, Ann. Geophys., 27, 1153–1173, https://doi.org/10.5194/angeo-27-1153-2009, 2009. a
Matsuno, T.: A Dynamical Model of the Stratospheric Sudden Warming, J.
Atmos. Sci., 28, 1479–1494,
https://doi.org/10.1175/1520-0469(1971)028<1479:ADMOTS>2.0.CO;2, 1971. a, b
Matthias, V. and Ern, M.: On the origin of the mesospheric quasi-stationary planetary waves in the unusual Arctic winter 2015/2016, Atmos. Chem. Phys., 18, 4803–4815, https://doi.org/10.5194/acp-18-4803-2018, 2018. a, b
Middleton, H. R., Mitchell, N. J., and Muller, H. G.: Mean winds of the mesosphere and lower thermosphere at 52∘ N in the period 1988–2000, Ann. Geophys., 20, 81–91, https://doi.org/10.5194/angeo-20-81-2002, 2002. a, b
Pedatella, N., Liu, H.-L., and Hagan, M.: Day-to-day migrating and nonmigrating
tidal variability due to the six-day planetary wave, J. Geophys. Res., 117, A06301, https://doi.org/10.1029/2012JA017581, 2012. a
Portnyagin, Y. I., Solovjova, T. V., Makarov, N. A., Merzlyakov, E. G., Manson, A. H., Meek, C. E., Hocking, W., Mitchell, N., Pancheva, D., Hoffmann, P., Singer, W., Murayama, Y., Igarashi, K., Forbes, J. M., Palo, S., Hall, C., and Nozawa, S.: Monthly mean climatology of the prevailing winds and tides in the Arctic mesosphere/lower thermosphere, Ann. Geophys., 22, 3395–3410, https://doi.org/10.5194/angeo-22-3395-2004, 2004. a, b, c, d
Portnyagin, Y. I., Merzlyakov, E. G., Solovjova, T. V., Jacobi, C.,
Kürschner, D., Manson, A., and Meek, C.: Long-term trends and
year-to-year variability of mid-latitude mesosphere/lower thermosphere winds,
J. Atmos. Solar-Terr. Phy., 68, 1890–1901,
https://doi.org/10.1016/j.jastp.2006.04.004, 2006. a
Qian, L., Jacobi, C., and McInerney, J.: Trends and Solar Irradiance Effects in
the Mesosphere, J. Geophys. Res., 124, 1343–1360,
https://doi.org/10.1029/2018JA026367, 2019. a
Rind, D., Lean, J., Lerner, J., Lonergan, P., and Leboissitier, A.: Exploring
the stratospheric/tropospheric response to solar forcing, J. Geophys. Res., 113, D24103, https://doi.org/10.1029/2008JD010114, 2008. a
Salby, M. L. and Callaghan, P. F.: Influence of the Solar cycle on the
Gerneral circulation of the Stratosphere and Upper Troposphere, Space Sci.
Rev., 124, 287–303, https://doi.org/10.1007/s11214-006-9064-3, 2006. a
Schminder, R. and Kürschner, D.: Permanent monitoring of the upper
mesosphere and lower thermosphere wind fields (prevailing and semidiurnal
tidal components) obtained from LF D1 measurements in 1991 at the Collm
Geophysical Observatory, J. Atmos. Terr. Phys., 56,
1263–1269, https://doi.org/10.1016/0021-9169(94)90064-7,
1994. a
Shibuya, R., Sato, K., Tsutsumi, M., Sato, T., Tomikawa, Y., Nishimura, K., and Kohma, M.: Quasi-12 h inertia–gravity waves in the lower mesosphere observed by the PANSY radar at Syowa Station (39.6∘ E, 69.0∘ S), Atmos. Chem. Phys., 17, 6455–6476, https://doi.org/10.5194/acp-17-6455-2017, 2017. a
Stober, G. and Chau, J. L.: A multistatic and multifrequency novel approach for
specular meteor radars to improve wind measurements in the MLT region,
Radio Sci., 50, 431–442, https://doi.org/10.1002/2014RS005591, 2015. a
Stober, G., Jacobi, C., and Keuer, D.: Distortion of meteor count rates due to cosmic radio noise and atmospheric particularities, Adv. Radio Sci., 8, 237–241, https://doi.org/10.5194/ars-8-237-2010, 2010. a
Stober, G., Jacobi, C., Matthias, V., Hoffmann, P., and Gerding, M.: Neutral
air density variations during strong planetary wave activity in the mesopause
region derived from meteor radar observations, J. Atmos. Solar-Terr. Phy., 74, 55–63, https://doi.org/10.1016/j.jastp.2011.10.007,
2012. a
Stober, G., Matthias, V., Brown, P., and Chau, J. L.: Neutral density variation
from specularmeteor echo observations spanning one solar cycle, Geophys.
Res. Lett., 41, 6919–6925, https://doi.org/10.1002/2014GL061273, 2014. a
Stober, G., Matthias, V., Jacobi, C., Wilhelm, S., Höffner, J., and Chau, J. L.: Exceptionally strong summer-like zonal wind reversal in the upper mesosphere during winter 2015/16, Ann. Geophys., 35, 711–720, https://doi.org/10.5194/angeo-35-711-2017, 2017. a, b, c, d
Stober, G., Chau, J. L., Vierinen, J., Jacobi, C., and Wilhelm, S.: Retrieving horizontally resolved wind fields using multi-static meteor radar observations, Atmos. Meas. Tech., 11, 4891–4907, https://doi.org/10.5194/amt-11-4891-2018, 2018.
a, b, c
Tsuda, T.: Characteristics of atmospheric gravity waves observed using the MU
(Middle and Upper atmosphere) radar and GPS (Global Positioning System) radio
occultation, P. Jpn. Acad., B-Phys., 90, 12–27,
https://doi.org/10.2183/pjab.90.12, 2014. a
Tsuda, T., Kato, S., and Vincent, R.: Long period wind oscillations observed by
the Kyoto meteor radar and comparison of the quasi-2-day wave with Adelaide
HF radar observations, J. Atmos. Terr. Phys., 50, 225–230,
https://doi.org/10.1016/0021-9169(88)90071-2, 1988. a
Tsuda, T., Nishida, M., Rocken, C., and Ware, R. H.: A Global Morphology of
Gravity Wave Activity in the Stratosphere Revealed by the GPS Occultation
Data (GPS/MET), J. Geophys. Res., 105, 7257–7273,
https://doi.org/10.1029/1999JD901005, 2000. a
Webster, A. R., Brown, P. G., Jones, J., Ellis, K. J., and Campbell-Brown, M.: Canadian Meteor Orbit Radar (CMOR), Atmos. Chem. Phys., 4, 679–684, https://doi.org/10.5194/acp-4-679-2004, 2004. a
Yiğit, E. and Medvedev, A.: Internal wave coupling processes in Earth’s
atmosphere, Adv. Space Res., 55, 983–1003,
https://doi.org/10.1016/j.asr.2014.11.020,
2015. a
Yiğit, E. K. K. P., Georgieva, K., and Ward, W.: A review of vertical
coupling in the Atmosphere–Ionosphere system: Effects of waves, sudden
stratospheric warmings, space weather, and of solar activity, J. Atmos. Solar-Terr. Phy., 141, 1–12,
https://doi.org/10.1016/j.jastp.2016.02.011, 2016. a
Yuan, T., Schmidt, H., She, C. Y., Krueger, D. A., and Reising, S.: Seasonal
variations of semidiurnal tidal perturbations in mesopause region temperature
and zonal and meridional winds above Fort Collins, Colorado (40.6∘ N,
105.1∘ W), J. Geophys. Res., 113, D20103, https://doi.org/10.1029/2007JD009687,
2008a. a, b
Yuan, T., She, C.-Y., Krueger, D. A., Sassi, F., Garcia, R., Roble, R. G.,
Liu, H.-L., and Schmidt, H.: Climatology of mesopause region temperature,
zonal wind, and meridional wind over Fort Collins, Colorado (41∘ N,
105∘ W), and comparison with model simulations, J. Geophys. Res., 113, D03105, https://doi.org/10.1029/2007JD008697, 2008b. a
Short summary
We report on long-term observations of atmospheric parameters in the mesosphere and lower thermosphere made over the last 2 decades for the northern-latitude locations of Andenes, Juliusruh, and Tavistock. The observations are based on meteor wind measurements and further include the long-term variability of winds, tides, and the kinetic energy of gravity waves and planetary waves. Furthermore, the influence on an 11-year oscillation on the winds and tides is presented.
We report on long-term observations of atmospheric parameters in the mesosphere and lower...
