摘要
利用1979—2015年ERA-interim月平均再分析资料,分析了夏季南亚高压(SAH)与邻近上对流层下平流层(UTLS)区水汽空间分布特征,讨论了二者的相关关系和因果联系。结果表明:(1)在对流层上层,水汽大值区位于南亚高压的东南侧,并随高度升高向西北倾斜到100 hPa,水汽大值中心基本位于南亚高压中心附近。(2)南亚高压偏强(弱)时,南亚高压东部UTLS区水汽显著偏多(少),而南亚高压西北部水汽异常不显著。(3)南亚高压偏强(弱)时南亚高压中部UTLS区水汽偏多(少)可能与南亚高压对水汽的抽吸和对水汽输送屏障有关。(4)而南亚高压东南侧UTLS区水汽偏多(少)时南亚高压偏强(弱)可能与深对流输送的水汽潜热释放有关。
The spatial distribution characteristics of South Asian High（SAH）and water vapor in the upper troposphere and lower stratosphere（UTLS）over the SAH in summer were analyzed based on the ERA-interim reanalysis monthly data from 1979 to 2015.The correlation and causality between the two variables were also discussed.The results are as follows.（1）In the upper troposphere,the area of high water vapor is located on the southeastern side of SAH and tilts northwestward with increasing height until 100 hPa,and the center of water vapor is near the center of SAH.（2）When SAH is stronger（weaker）,the water vapor content in the UTLS area of eastern SAH is significantly higher（lower）,while the water vapor anomalies in the northwestern SAH are not significant.（3）The reason that water vapor content is higher（lower）in the middle of SAH over the UTLS area when SAH is stronger（weaker）SAH may be because of the suction and transport barrier effects of SAH to water vapor.（4）A stronger（weaker）SAH often corresponds to higher（lower）water vapor content in the UTLS to the southeast of SAH,which is probably associated with the latent heat release induced by deep convective water vapor transport.
作者
黄莹
郭栋
周顺武
施春华
李震坤
覃皓
苏昱丞
王琳玮
HUANG Ying;GUO Dong;ZHOU Shunwu;SHI Chunhua;LI Zhenkun;QIN Hao;SU Yucheng;WANG Linwei(Key Laboratory of Meteorological Disaster, Ministry of Education （ KLME） /Joint International Research Laboratory of Climate and Environment Change （ILCEC） /Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters （ CIC-FEMD ） , Nanj ing University of Information Science Technology, Nanjing 210044, China;Shanghai Climate Center, Shanghai 200030, China;Shanghai Public Meteorological Service Center, Shanghai 200030,China)
出处
《气象学报》
CAS
CSCD
北大核心
2017年第6期934-942,共9页
Acta Meteorologica Sinica
基金
国家自然科学基金(91537213
41675039
41641042
41375047
41375092
41275095)
国家重点研发计划课题(2016YFA0602003)
江苏高校优势学科建设工程项目(PAPD)
关键词
南亚高压
水汽
因果联系
夏季
上对流层和下平流层
South Asian High, Water vapor, Causality, Summer, Upper troposphere and lower stratosphere
