DOI: 10.1002/2017JD027460
Scopus记录号: 2-s2.0-85044471651
论文题名: Secondary Gravity Waves in the Winter Mesosphere: Results From a High-Resolution Global Circulation Model
作者: Becker E. ; Vadas S.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2605
结束页码: 2627
语种: 英语
英文关键词: GW-resolving GCM
; orographic GWs
; secondary GWs
; winter polar mesopause
英文摘要: This study analyzes a new high-resolution general circulation model with regard to secondary gravity waves in the mesosphere during austral winter. The model resolves gravity waves down to horizontal and vertical wavelengths of 165 and 1.5 km, respectively. The resolved mean wave drag agrees well with that from a conventional model with parameterized gravity waves up to the midmesosphere in winter and up to the upper mesosphere in summer. About half of the zonal-mean vertical flux of westward momentum in the southern winter stratosphere is due to orographic gravity waves. The high intermittency of the primary orographic gravity waves gives rise to secondary waves that result in a substantial eastward drag in the winter mesopause region. This induces an additional eastward maximum of the mean zonal wind at z ∼ 100 km. Radar and lidar measurements at polar latitudes and results from other high-resolution global models are consistent with this finding. Hence, secondary gravity waves may play a significant role in the general circulation of the winter mesopause region. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114282
Appears in Collections: 气候减缓与适应
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作者单位: Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany; Northwest Research Associates, Boulder, CO, United States
Recommended Citation:
Becker E.,Vadas S.L.. Secondary Gravity Waves in the Winter Mesosphere: Results From a High-Resolution Global Circulation Model[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)