Momentum balance and gravity wave forcing in the mesosphere and lower thermosphere

被引：24

作者：

Liu, H. -L. ^{[1
]}

Marsh, D. R. ^{[2
]}

She, C. -Y. ^{[3
]}

Wu, Q. ^{[1
]}

Xu, J. ^{[4
]}

机构：

[1] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA

[2] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA

[3] Colorado State Univ, Dept Phys, Ft Collins, CO 80526 USA

[4] Chinese Acad Sci, State Key Lab Space Weather, Beijing 100080, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

STRATOSPHERE; SATELLITE; DYNAMICS; WIND;

D O I：

10.1029/2009GL037252

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Gravity wave forcing (GWF), which is the primary driver of the mesospheric and lower thermospheric (MLT) circulation, is difficult to measure directly. In this work, the zonal mean GWF at extratropical MLT is deduced from measured winds using momentum balance. With the GWF dominating in the MLT, the zonally averaged zonal momentum equation can be simplified to a balance relation between the GWF and the Coriolis force in the extratropics. The meridional advection of zonal momentum makes a higher order contribution to the momentum balance, especially at places where the GWF maximizes. This method is tested with WACCM3 model and preliminary results are obtained from wind measurements by CSU Na lidar and TIMED/TIDI. Citation: Liu, H.-L., D. R. Marsh, C.-Y. She, Q. Wu, and J. Xu (2009), Momentum balance and gravity wave forcing in the mesosphere and lower thermosphere, Geophys. Res. Lett., 36, L07805, doi: 10.1029/2009GL037252.

引用

页数：5

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