气象学报Issue(3)：442-458,17.DOI:10.11676/qxxb2015.028
2013年5月华南强降水与中国南海夏季风爆发
Severe rainfalls in South China during May 2013 and its relation to the onset of the South China Sea summer monsoon
摘要
Abstract
Based on the field observation of the South China Monsoon Rainfall Experiment (SCMREX),the National Centers for Environment Prediction (NCEP)final (FNL)operational global analysis data and the equivalent temperature of the black-body at the top of the cloud (TBB)data,a comparative analysis of the circulation and related meteorological elements between two severe rainfall events (7-12 and 14-17 May)in South China in 2013 was conducted.The South China Sea (SCS)sum-mer monsoon established in the third pentad of May 2013,just in between two severe rainy stages.There exist significant differences between two events in the major circulation systems,e.g.the South Asia High (SAH)and the subtropical high westerly jet at the higher levels,the circulation pattern at 500 hPa,the water vapor transportation,etc.It indicates typical va-riances of the effects of the large scale circulation on severe rainfalls before and after the onset of SCS monsoon.During 7-12 May,influenced mainly by both the southward invasion of cold front and the convergence of warm moist airflow from the tropi-cal region,the two rain-bands appeared in northern and southern South China.Differently,due to the vigorous convective ac-tivity over South China caused by the strong warm and moist air after the onset of monsoon,the rain-band was formed in the north of Guangdong Province during 14-17 May,with more concentrated and convective precipitation than the former event. The underlying physical mechanisms for the two severe rainfall events are quasi-balanced thermal adjustment process,which is better reflected during the second event because of heavier precipitation.The sounding data in Guangdong are also applied to re-veal differences of the atmosphere dynamic and thermodynamic effects between the two warm sector rainstorms.The warm sec-tor rainstorm during 7-12 May occurred under the condition of the atmospheric baroclinic instability induced by the strong low-levels vertical wind shear.However,the strong coupling between the high-level and low-level jet streams caused the warm sector rainstorm during 14-17 May after the onset of the SCS summer monsoon.关键词
华南强降水/南海夏季风/锋面/探空资料Key words
Severe rainfall in South China/SCS summer monsoon/Front/Sounding data分类
天文与地球科学引用本文复制引用
赵欢,张人禾,温敏..2013年5月华南强降水与中国南海夏季风爆发[J].气象学报,2015,(3):442-458,17.基金项目
资助课题国家自然科学基金项目（41221064）、国家财政部公益性行业（气象）科研专项经费项目（GYHY201306004）和国家重点基础研究发展计划（973）项目（2012CB417205）。 （）
