Relationship Between Summer Precipitation of Shanxi Province and SST in Eastern Equatorial Pacific
Abstract：Based on NCEP/NCAR monthly reanalysis geo-potential height,NOAA monthly SST data and the 50 a （1960-2009） rainfall over 58 meteorological stations in Shanxi province, the unusual characteristics of general circulation in drought and flood years of Shanxi are investigated, and the correlationbetween the summer precipitation index of Shanxi province and the SST field in eastern equatorial Pacific is further studied. Results show that in the years of the summer precipitation anomalies of Shanxi, the large-scale circulation systems of 500 hPa geo-potential height are obviously different, such as a high- pressure ridge over the Ural Mountain and deep trough over Baikal Lake and West Pacific subtropicalhigh. The zonal wind of 850 hPa in the southern of Mongolian cyclone and Meridional wind （East Asian summer monsoon） over eastern regions of China to North China tend to exhibit anomalies, which have great impact on the summer rainfall of Shanxi province. The cold SST tongue from eastern equatorial Pa- cific SST and the warm SST tongue from the East Pacific coast often effect a change of circulation sys- tems, which has a significant impact on summer precipitation of Shanxi. Nino region SST anomalies has a significant impact on the summer precipitation of Shanxi province, that is, the lower sea surface tempera- ture of Nino region is conducive to summer more rainfall of Shanxi province.
Keywords：summer precipitationgeneral circulationSST in eastern equatorial Pacificcompositeanalysiscorrelation analysis
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 14-20 )