气象科学2011，Vol.31Issue(3)：258-265,8.
东亚副热带急流与东北夏季降水异常的关系
Relationship between the East Asian subtropical westerly jet and summer rainfall anomaly in Northeast China
摘要
Abstract
The relationship between the East Asian subtropical westerly jet (EASWJ) and the summer (July and August) rainfall anomaly in Northeast China is investigated by using the observed precipitation data at 88 meteorological stations and the NCEP/NCAR monthly reanalysis data.The results show that the intensity of EASWJ center over the Tibetan Plateau at 200 hPa increased (decreased) and the westerly jet axis oriented northeast-southwestwards (northwest-southwestwards) in the years with abnormally more (less) summer rainfall over Northeast China.The results also show significant differences in the water vapor transport and atmospheric circulation at different levels between the abnormally more and less summer rainfall years.The analysis of the thermal features indicates that the changes of the meridional temperature gradients in the mid-upper troposphere over the Tibetan Plateau have important impacts on the intensity of the summer EASWJ center over the Tibetan Plateau.关键词
副热带西风急流/大气环流差异/东北夏季降水异常Key words
Subtropical westerly jet/ Atmospheric circulation difference/ Summer precipitation anomaly in Northeast China分类
天文与地球科学引用本文复制引用
兰明才,张耀存..东亚副热带急流与东北夏季降水异常的关系[J].气象科学,2011,31(3):258-265,8.基金项目
公益性行业(气象)科研专项(GYHY200706005,GYHY201006019) （气象）
