Poleward expansion of the tropical belt derived from upper tropospheric water vapour

被引：3

作者：

You, Qinglong ^{[1
,2
,3
,4
,5
]}

Min, Jinzhong ^{[1
,2
,3
,4
]}

Kang, Shichang ^{[6
]}

Pepin, Nick ^{[7
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, ESMC, Nanjing 210044, Peoples R China

[2] Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Peoples R China

[3] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China

[4] Nanjing Univ Informat Sci & Technol, NIAMS, Nanjing 210044, Peoples R China

[5] Key Lab Sichuan Prov, Open Res Fund Program Plateau Atmosphere & Enviro, Chengdu, Peoples R China

[6] Chinese Acad Sci, State Key Lab Cryospher Sci, Lanzhou, Peoples R China

[7] Univ Pittsburgh, Dept Geog, Pittsburgh, PA 15260 USA

来源：

INTERNATIONAL JOURNAL OF CLIMATOLOGY | 2015年 / 35卷 / 09期

基金：

中国国家自然科学基金;

关键词：

poleward expansion; tropical belt; water vapour; VARIABILITY; HUMIDITY;

D O I：

10.1002/joc.4125

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Based on intersatellite-calibrated high-resolution infrared radiation sounder (HIRS) upper tropospheric water vapour (UTWV) brightness temperatures, the width of the tropical belt is defined as the distance between the latitudes at which maximum HIRS UTWV brightness temperatures are recorded in both hemispheres. Poleward expansion of the tropical belt is evident during 1979-2013 on an annual basis, with an average global magnitude of 1.57 degrees latitude per decade. Most rapid widening is evident in the west Pacific, in agreement with the strengthening of the Walker Circulation over time. This research suggests that the HIRS UTWV brightness temperatures are a good proxy to investigate the expansion of the tropical circulation in low latitudes.

引用

页码：2237 / 2242

页数：6

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