关键词: 回潮, 回潮

Abstract: In order to understand fully the temporal and spatial distribution characteristics of the spring gale anomalies in Shanxi Province and reveal its causes, to provide decision-making basis for agricultural disaster prevention and mitigation and improving the ecological environment, the daily wind observations of 65 meteorological stations, the air-sea-related informations in 1986-2009 and the methods, such as empirical orthogonal function decomposition, synthetic analysis, correlation analysis and singular value decomposition were used to analyze the anomalies of the spring gale days in Shanxi Province and the relationships between it and the atmospheric circulation, the Pacific SSTA anomalies. The results showed that: (1) the interannual anomalies of the spring gale days in Shanxi Province mainly existed 2 kinds of different spatial distribution characteristics, the same type was main, in addition, existed the distribution characteristics that too many and less coexist. (2) The interannual anomalies of the gale days in the spring in Shanxi Province and the circulation anomaly over the middle and high latitude existed significant relationship. The circulation anomaly in multi-gale years mainly showed that: through in the east Asian was deepened and the ridge over Ural was strengthened. The anomaly of 500 hPa height mainly effected the interannual anomalies of gale days. There were larger correlation between the gale days in spring and the westerly circulation index in Asian, the polar vortex intensity index in northern hemisphere and the winter monsoon index in east Asian. (3) There was a certain relationship between the gale days in the spring in Shanxi Province and the Pacific SST anomaly, the Pacific SSTA anomaly mainly affected the interdecadal anomaly of the gale days, and this effect was persistent, it could continue to affect from early summer to the spring over the same period.