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Effect of gravity waves on the tropopause temperature, height and water vapor in Tibet from COSMIC GPS Radio Occultation observations
Khan, Attaullah1,2; Jin, Shuanggen1,3
2016-02-01
Source PublicationJOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
Volume138Pages:23-31
AbstractThe 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.
KeywordTropopause Gravity Wave Gps Radio Occultation Tibet
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jastp.2015.12.001
WOS KeywordTROPICAL TROPOPAUSE ; DECADAL CHANGES ; STRATOSPHERE ; ATMOSPHERE ; VARIABILITY ; LAYER ; TROPOSPHERE ; REANALYSES ; PLATEAU ; GPS/MET
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS SubjectGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS IDWOS:000370769900003
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16145
Collection南极天文中心
Affiliation1.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
Recommended Citation
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.
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