辽宁酷热日的天气气候分析

Weather analysis of sweltering hot days in Liaoning Province

利用统计方法对辽宁1951-2003年的酷热天气进行了分析,发现辽宁的酷热天气主要出现在辽西地区;酷热天气在5-7月均可出现,主要集中在7月;无明显的年际变化。中纬度东—西高压带是造成辽宁酷热天气的主要天气形势;其次是西风带暖高压,在850hPa温度场上,辽宁西部在24℃暖中心之内有很好的指示意义。

The sweltering hot days during past 53 years (1951-2003) are investigated by means of statistical analysis. The result show that sweltering hot days mainly occur in the western Liaoning from May to July, mainly in July. Eastern-to-western high in the middle latitude is contributing factor of the sweltering hot days , and the warm high in westerlies might play the second important role.And the warm center of 24℃ around the western Liaoning over 850hPa is a remarkable index for prediction of sweltering hot days.