Evidence for diurnal period Kelvin waves in the Martian atmosphere from Mars Global Surveyor TES data

被引：69

作者：

Wilson, RJ ^{[1
]}

机构：

[1] Princeton Univ, NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08542 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2000年 / 27卷 / 23期

关键词：

D O I：

10.1029/2000GL012028

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Midlevel (similar to 25 km) atmospheric temperatures derived from Mars Global Surveyor (MGS) Thermal Emission Spectrometer (TES) spectra indicate the presence of stationary waves and thermal tides. Stationary waves are prominent, at middle to high latitudes where westerly zonal flow is indicated by the meridional temperature gradient. Longitudinal variability within 30 degreesS to 30 degreesN is dominated by topographically-forced nonmigrating thermal tides that have westward and eastward propagating components. The MGS mapping data are available at two fixed local times so that it is not possible to distinguish between these components or isolate the sun-synchronous tide. A comparison with Mars general circulation model (MGCM) simulations suggests that the observed wave patterns are consistent with the presence of eastward propagating, diurnal period Kelvin waves with zonal wavenumbers one and two. These waves can propagate to great heights and may account for observed zonal variations in thermospheric density.

引用

页码：3889 / 3892

页数：4

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