Journal cover Journal topic
Annales Geophysicae An open-access journal of the European Geosciences Union
Ann. Geophys., 23, 1131-1137, 2005
http://www.ann-geophys.net/23/1131/2005/
doi:10.5194/angeo-23-1131-2005
© Author(s) 2005. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
03 Jun 2005
Intra-seasonal Oscillations (ISO) of zonal-mean meridional winds and temperatures as measured by UARS
F. T. Huang1, H. G. Mayr2, and C. A. Reber2 1Terranet Inc., Mitchelville, Maryland, USA
2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Abstract. Based on an empirical analysis of measurements with the High Resolution Doppler Imager (HRDI) on the UARS spacecraft in the upper mesosphere (95km), persistent and regular intra-seasonal oscillations (ISO) with periods of about 2 to 4 months have recently been reported in the zonal-mean meridional winds. Similar oscillations have also been discussed independently in a modeling study, and they were attributed to wave-mean-flow interactions. The observed and modeled meridional wind ISOs were largely confined to low latitudes. We report here on an analysis of concurrent UARS temperature measurements, which produces oscillations similar to those seen in the meridional winds. Although the temperature oscillations are observed at lower altitudes (55km), their phase variations with latitude are qualitatively consistent with the inferred properties seen in the meridional winds and thus provide independent evidence for the existence of ISOs in the mesosphere.

Citation: Huang, F. T., Mayr, H. G., and Reber, C. A.: Intra-seasonal Oscillations (ISO) of zonal-mean meridional winds and temperatures as measured by UARS, Ann. Geophys., 23, 1131-1137, doi:10.5194/angeo-23-1131-2005, 2005.
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