Abstract:

Abstract: Based on the annually last frost data of 35 stations in Shanxi during 1971—2008 and the mean monthly reanalysis SST data(grid:2°×2°)of NCEP/NCAR,the temporal-spatial characteristics of the last frost in Shanxi and the relationship of the sea surface temperature in spring of the northern Pacific Ocean are investigated in terms of wavelet analysis, empirical orthogonal function(EOF), singular value decomposition(SVD)and else. Results show that the temporal evolution and spatial distribution of the last frost are not homogeneous in Shanxi. There are prominent inter-annual and inter-decadal variability of the last frost. The last frost anomaly existed 3-year、5-year, 15-year periodic variation in Shanxi. And the relationship between the last frost and SST over the northern Pacific Ocean are investigated, The key region which influences the last frost anomaly has been found. And the SST of the key region has the best negative correlation with the last frost.