1961-2012年夏季南亚高压与中国云南地区降水的关系

摘要

Based on monthly average reanalysis data from NCEP/NCAR and monthly precipitation data at 124 weather stations in Yunnan region from 1961 to 2012,relationships between the South Asian High (SAH)and pre-cipitation in summer in Yunnan were analyzed using a correlation analysis method.The results show that relation-ship between summer precipitation in the southwest of Yunnan region and longitude of SAH main center is a sig-nificant negative correlation from 1961 to 2012,so is between precipitation in the south of Yunnan region and areas of SAH.In June,precipitation in the northwest and south of Yunnan region is significantly positive correlated to positions of SAH ridge line as well as main center latitude;precipitation in the southwest of Yunnan region is a sig-nificantly positive correlation with SAH main central intensity and a significant negative correlation with SAH main center longitude;precipitation in the middle of Yunnan region is a positive correlation with SAH main center lati-tude.In July,relationship between precipitation in the southwest of northwestern and southwestern Yunnan region and in the south of study area and SAH ridge line location is positive,while it is negative between precipitation in the west of Yunnan region and SAH main center intensity and between precipitation in the middle and east of Yun-nan region and SAH main center longitude.In August,precipitation in the south,east and center of Yunnan region is significantly negative correlated to SAH area.%基于1961—2012年NCEP／NCAR月平均再分析资料和云南地区124个气象观测站月降水资料，利用相关分析法分析夏季南亚高压与云南地区降水的关系。结果表明：1961—2012年夏季滇西南地区降水与南亚高压主中心经度呈较显著的负相关，滇南地区降水与南亚高压面积呈较显著的负相关；6月滇西北和滇南地区降水与南亚高压脊线位置和高压主中心纬度呈显著的正相关，滇西南地区降水与南亚高压主中心强度呈显著的正相关，而与南亚高压主中心经度呈显著的负相关，滇中地区降水与南亚高压主中心纬度呈显著的正相关；7月滇西南、滇西北的西南部和滇西的北部地区降水与南亚高压脊线位置呈较显著的正相关，滇西地区降水与南亚高压主中心强度呈较显著的负相关，滇中和滇东地区降水与南亚高压主中心经度呈较显著的负相关；8月滇西南、滇中、滇南和滇东地区降水与南亚高压面积呈显著的负相关。