DOI: 10.1002/2013GL058203
论文题名: Monitoring the width of the tropical belt with GPS radio occultation measurements
作者: Ao C.O. ; Hajj A.J.
刊名: Geophysical Research Letters
ISSN: 0094-8334
EISSN: 1944-8065
出版年: 2013
卷: 40, 期: 23 起始页码: 6236
结束页码: 6241
语种: 英语
英文关键词: GPS
; Hadley circulation
; occultation
; RO
; tropical belt
; tropopause
Scopus关键词: Hadley circulation
; occultation
; RO
; Tropical belt
; tropopause
; Climate change
; Clouds
; Global positioning system
; Tropics
; belt
; climate change
; GPS
; linearity
; measurement method
; monitoring
; Northern Hemisphere
; resolution
; temperature profile
; tropopause
; United States
英文摘要: GPS radio occultation data collected over the period 2002-2011 were analyzed to examine the possible expansion of the tropical belt due to climate change. By the use of high vertical-resolution temperature profiles, monthly averages of the lapse rate tropopause were obtained and used to derive a decade-long time series of the tropical edge latitude (TEL) in each hemisphere and its linear trends. Two different TEL criteria were examined. Our analysis shows that a statistically significant widening trend of ≈1° latitude/decade was found in the Northern Hemisphere (NH) by either criterion. This contrasts strongly with the Southern Hemisphere (SH), where no statistically significant trends were found. Comparison with ECMWF reanalysis shows good agreement, but the agreement is worse over SH. Substantial differences in seasonal trends were found between NH and SH, with the latter showing strong widening in the austral summer countered by contraction over the austral winter and spring. Key Points A decade of tropopause height data was used to study changes in tropical width Widening rates are sensitive to the definition of the tropical boundaries Significant widening trend was observed in NH but not SH for the past decade © Published 2013. This article is a U.S. Government work and is in the public domain in the USA. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84889032550&doi=10.1002%2f2013GL058203&partnerID=40&md5=e69d1baa05c32154cde2f1d0e0b5c2f1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5598
Appears in Collections: 气候减缓与适应
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, M/S 138-308, 4800 Oak Grove Dr., Pasadena, CA 91109, United States
Recommended Citation:
Ao C.O.,Hajj A.J.. Monitoring the width of the tropical belt with GPS radio occultation measurements[J]. Geophysical Research Letters,2013-01-01,40(23).