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题名: Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations
作者: Khan, Attaullah1, 2; Jin, Shuanggen1, 3
刊名: JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
出版日期: 2016-02-01
卷号: 138, 页码:23-31
关键词: Tropopause ; Gravity wave ; GPS Radio Occultation ; Tibet
DOI: 10.1016/j.jastp.2015.12.001
文章类型: Article
英文摘要: The tropopause plays an important role in climate change, particularly in Tibet with complex topography and climate change system. In this paper, the temperature and height of the Cold Point Tropopause (CPT) in Tibet are obtained and investigated from COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate) GPS Radio Occultation (RO) during June 2006-Feb 2014, which are compared with Lapse Rate Tropopause (LRT) from Atmospheric Infrared Sounder (AIRS/NASA). Furthermore, the impact of Gravity waves (GW) potential energy (E-p) on the CPT-Temperature, CPT-Height, and the variation of stratospheric water vapor with GW E-p variations are presented. Generally the coldest CPT temperature is in June-July-August (JJA) with =76.5 degrees C, resulting less water vapor into the stratosphere above the cold points. The temperature of the cold point increases up to -69 degrees C during the winter over the Tibetan Plateau (25-40 degrees N, 70-100 degrees E) that leads to increase in water vapor above the cold points (10 hPa). Mean vertical fluctuations of temperature are calculated as well as the mean gravity wave potential energy E-p for each month from June 2006 to Feb 2014. Monthly E-p is calculated at 5 x 5 grids between 17 km and 24 km in altitude for the Tibetan Plateau. The EP raises from 1.83 j/Kg to 3.4 J/Kg from summer to winter with mean E-p of 2.5 J/Kg for the year. The results show that the gravity waves affect the CPT temperature and water vapor concentration in the stratosphere. Water vapor, CPT temperature and gravity wave (Er) have good correlation with each other above the cold points, and water vapor increases with increasing E. (C) 2015 Elsevier Ltd. All rights reserved.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
研究领域[WOS]: Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
关键词[WOS]: TROPICAL TROPOPAUSE ; DECADAL CHANGES ; STRATOSPHERE ; ATMOSPHERE ; VARIABILITY ; LAYER ; TROPOSPHERE ; REANALYSES ; PLATEAU ; GPS/MET
收录类别: SCI
项目资助者: Shanghai Science and Technology Commission Project(12DZ2273300) ; National Natural Science Foundation of China (NSFC)(11373059 ; 11573052)
语种: 英语
WOS记录号: WOS:000370769900003
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16145
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Planetary Sci, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Bulent Ecevit Univ, Dept Geomat Engn, TR-67100 Zonguldak, Turkey
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