COSMIC GPS observations of topographic gravity waves in the stratosphere around the Tibetan Plateau

被引：14

作者：

Zeng XuanYun ^{[1
]}

Xue XiangHui ^{[1
]}

Dou XianKang ^{[1
]}

Liang Chen ^{[1
]}

Jia MingJiao ^{[1
]}

机构：

[1] Univ Sci & Technol China, Key Lab Geospace Environm, Sch Earth & Space Sci, Chinese Acad Sci, Hefei 230026, Peoples R China

来源：

SCIENCE CHINA-EARTH SCIENCES | 2017年 / 60卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Tibetan Plateau; Gravity wave; Stratosphere; Topography; Filtering of wind; GLOBAL MORPHOLOGY; OCCULTATION DATA; ENERGY;

D O I：

10.1007/s11430-016-0065-6

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Temperature profiles provided by the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) global positioning system (GPS) satellite constellation were used to study an eight-year series (2007 to 2015) of gravity wave (GW) potential energy in the stratosphere (18-30 km) around the Tibetan Plateau (TP). We found that with increasing altitude, the GW potential energy (E (p)) values in the stratosphere caused by convection decreases. The importance of GWs that are stimulated by topography is enhanced in this area. In the TP, which was considered to lack strong topographical GW activity, clear activity existed in the spring and winter of all studied years. Based on the latitudinal zone of the TP, the distribution of GW potential energy is highly consistent with the elevation of the local topography. The activities of topographical GWs are strongly filtered as they propagate upward to the area of zero speed wind. The analysis indicates that in the TP, clear orographic GW excitation exists and propagates upward to the upper stratosphere, where it is greatly influenced by the wind.

引用

页码：188 / 197

页数：10

共 33 条

[1] COSMIC GPS Observations of Northern Hemisphere winter stratospheric gravity waves and comparisons with an atmospheric general circulation model [J].