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| Home > Publications database > Remote sounding of atmospheric gravity waves with satellite limb and nadir techniques |
| Journal Article | PreJuSER-40890 |
; ; ; ; ; ;
2006
Elsevier Science
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.asr.2005.07.031
Abstract: Recent advances in satellite techniques hold great potential for mapping global gravity wave (GW) processes at various altitudes. Poor understanding of small-scale GWs has been a major limitation to numerical climate and weather models for making reliable forecasts. Observations of short-scale features have important implication for validating and improving future high-resolution numerical models. This paper summarizes recent GW observations and sensitivities from several satellite instruments, including MLS, AMSU-A, AIRS, GPS, and CLAES. It is shown in an example that mountain waves with horizontal wavelengths as short as similar to 30 km now can be observed by AIRS, reflecting the superior horizontal resolution in these modern satellite instruments. Our studies show that MLS, AMSU-A and AIRS observations reveal similar GW characteristics, with the observed variances correlated well with background winds. As a complementary technique, limb sounding instruments like CRISTA, CLAES, and GPS can detect GWs with better vertical but poorer horizontal resolutions. To resolve different parts of the broad GW spectrum, both satellite limb and nadir observing techniques are needed, and a better understanding of GW complexities requires joint analyses of these data and dedicated hieh-resolution model simulations. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.
Keyword(s): S ; gravity waves (auto) ; satellite observations (auto) ; instrument filter (auto) ; wave sources (auto)
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