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Characteristics of mesospheric gravity waves over the southeastern Tibetan Plateau region
Li, Qinzeng; Xu, Jiyao; Liu, Xiao; Yuan, Wei; Chen, Jinsong; Li, QZ (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2016
Volume121Issue:9Pages:9204-9221
ISSN2169-9380
Language英语
KeywordAirglow Gravity Wave Sources
AbstractThe Tibetan Plateau (TP), known as Third Pole of the Earth, has important influences on global climates and local weather. An important objective in present study is to investigate how orographic features of the TP affect the geographical distributions of gravity wave (GW) sources. Three-year OH airglow images (November 2011 to October 2014) from Qujing (25.6 degrees N, 103.7 degrees E) were used to study the characteristics of GWs over the southeastern TP region. Along with the almost concurrent and collocated meteor radar wind measurements and temperature data from SABER/TIMED satellite, the propagation conditions of three types of GWs (freely propagating, ducted, or evanescent) were estimated. Most of GWs exhibited ducted or evanescent characteristics. Almost all GWs propagate southeastward in winter. The GW propagation directions in winter are significantly different from other airglow imager observations at northern middle latitudes. Wind data and convective precipitation fields from the European Centre for Medium-Range Weather Forecasts reanalysis data are used to study the sources of GWs on the edge of the TP. Using backward ray-tracing analysis, we find that most of the mesospheric freely propagating GWs are located in or near the large wind shear intensity region (similar to 10km-similar to 17km) on the southeastern edge of the TP in spring and winter. The averaged value of momentum flux is 11.65.2m(2)/s(2) in winter and 7.53.1m(2)/s(2) in summer. This work will provide valuable information for the GW parameterization schemes in general circulation models in TP region.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5628
Collection空间科学部
Corresponding AuthorLi, QZ (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Li, Qinzeng,Xu, Jiyao,Liu, Xiao,et al. Characteristics of mesospheric gravity waves over the southeastern Tibetan Plateau region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016,121(9):9204-9221.
APA Li, Qinzeng,Xu, Jiyao,Liu, Xiao,Yuan, Wei,Chen, Jinsong,&Li, QZ .(2016).Characteristics of mesospheric gravity waves over the southeastern Tibetan Plateau region.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,121(9),9204-9221.
MLA Li, Qinzeng,et al."Characteristics of mesospheric gravity waves over the southeastern Tibetan Plateau region".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 121.9(2016):9204-9221.
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