Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations

	Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations
	Khan, Attaullah 1,2; Jin, Shuanggen 1,3
刊名	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
	2016-02-01
卷号	138 页码:23-31
关键词	Tropopause Gravity wave GPS Radio Occultation Tibet
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
语种	英语
WOS记录号	WOS:000370769900003
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16145]
专题	紫金山天文台_南极天文中心
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
推荐引用方式 GB/T 7714	Khan, Attaullah,Jin, Shuanggen. Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations[J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,2016,138:23-31.
APA	Khan, Attaullah,&Jin, Shuanggen.(2016).Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,138,23-31.
MLA	Khan, Attaullah,et al."Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 138(2016):23-31.