东亚中高纬环流对黑龙江省春播期降水异常的影响

Influence of East Asian mid-high latitude circulation on abnormal rainfall during spring sowing season in Heilongjiang Province

探讨了东亚中高纬环流对黑龙江省春播期降水异常的影响。结果表明:在500h Pa平均高度场和距平场上,西低东高、北高南低以及西负东正、北正南负等特征有利于出现较大降水,纬向环流或西高东低以及南正北负或西正东负等特征有利于干旱少雨。在850h Pa风距平场上,中国东北和华北为气旋环流,俄罗斯远东和鄂霍次克海为反气旋环流,黑龙江省多偏东风距平,这些特征有利于出现较大降水;与此相反的特征有利于干旱少雨。

This paper explores the influence of East Asian mid- high latitude circulation on the abnormal rainfall during the spring sowing season in Heilongjiang Province. Research show that the features such as the low in the west and high in the east,or low in the south and high in the north as well as negative in the west and positive in the east,or neghtive in the south and positive in the north in 500 h Pa average height field and anomaly field are favorable to much precipitation. Correspondingly,the opposite features are favourable to drought and fewer precipitation. In 850 h Pa wind anomely field,An cyclonic circulation in northeast China and north China and an anticyclonic circulation in Russian far east and over the Okhotsk Sea,as well as more anomaly in side of east wind in Heilongjiang Province are favorable to form more precipitation,and opposite features are fravorable to cause drought.