Articles | Volume 27, issue 4
https://doi.org/10.5194/angeo-27-1625-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.Characteristics of equatorial gravity waves derived from mesospheric airglow imaging observations
Abstract. We present the characteristics of small-scale (<100 km) gravity waves in the equatorial mesopause region derived from OH airglow imaging observations at Kototabang (100.3° E, 0.2° S), Indonesia, from 2002 to 2005. We adopted a method that could automatically detect gravity waves in the airglow images using two-dimensional cross power spectra of gravity waves. The propagation directions of the waves were likely controlled by zonal filtering due to stratospheric mean winds that show a quasi-biennial oscillation (QBO) and the presence of many wave sources in the troposphere.