中山大学学报（自然科学版）2018，Vol.57Issue(3)：34-43,10.DOI:10.13471/j.cnki.acta.snus.2018.03.005
中南半岛春季土壤湿度对南海及其周边地区夏季降水的影响
Effect of spring soil moisture in Indo-China Peninsula on summer precipitation over the South China sea and surrounding area
摘要
Abstract
In this paper,the influence of the spring soil moisture in the Indo-China Peninsula was ana-lyzed on summer precipitation over the South China Sea and surrounding area by using statistical methods like SVD.The results indicate that there exists obvious positive correlation between soil moisture and summer precipitation over the western Pacific Ocean and negative correlation between soil moisture and summer precipitation over the eastern Indian Ocean.Summer precipitation increased over the western Pa-cific and decreased over the eastern Indian Ocean when positive(negative)anomaly in soil moisture oc-curred over the Indo-China Peninsula.When soil moisture anomaly over the Indo-China Peninsula was positive,local evaporation increased,near surface humidity decreased,latent heat flux from ground to at-mosphere increased,surface albedo decreased,the absorption of solar shortwave radiation was strength-ened,and upward shortwave radiation correspondingly decreased.This resulted in that near surface tem-perature decreased,sensible heat flux and long-wave radiation decreased,and the sea-land thermal difference reduced,which enhanced the monsoon and caused monsoon to occur earlier.Furthermore,that enhanced the transportation of water vapor from the eastern Indian Ocean to the western Pacific Ocean, and increased the precipitation in the western Pacific.The increase in near surface temperature will lead to the opposite precipitation mode,and vice versa.关键词
中南半岛/南海/土壤湿度/夏季降水Key words
Indo-China Peninsula/the South China Sea/soil moisture/summer precipitation分类
大气科学引用本文复制引用
游家兴,李江南,赵杨洁,毛江玉..中南半岛春季土壤湿度对南海及其周边地区夏季降水的影响[J].中山大学学报（自然科学版）,2018,57(3):34-43,10.基金项目
国家重点研发计划项目(2016YFA0602701) （2016YFA0602701）
国家重点基础研究计划项目(2014CB953903) （2014CB953903）
国家自然科学基金(41275060) （41275060）
