哈密高温气候特征及其环流形势分型

本文利用1961～2014年哈密国家基准气象观测站5～9月逐日最高气温、极端最高气温和NCEP1°×1°再分析资料，统计分析哈密市高温天气的气候特征及其环流特征。结果表明：（1）哈密市高温天气具有明显的时间变化特点，1961～1993年是偏少期，1994年以后明显偏多，而近14a是呈直线上升的趋势，这与全球气候变暖趋势一致。（2）哈密市近54a年平均高温日数是35d，主要集中在6～8月，7月最多。（3）高温日数具有明显的年际变化，最多为2002年出现60d，最少为1993年仅出现了11d。（4）新疆脊、伊朗副热带高压与西太平洋副热带高压的强弱和位置与高温天气有很好的对应关系；哈密出现持续性高温天气过程在500hPa高度场主要表现为三类环流类型:西太副高西伸发展型、伊朗副高东伸发展型、西太副高西伸发展与伊朗副高东伸发展共同作用型。

The high temperature climate characteristics and its circulation situation analysis Xinjiang hami

In this paper,we used daily maximum temperature,extreme maximum temperature of hami national meteorological station and and NCEP1 1°x 1°reanalysis data from 1961 to 2014(May to September) with high temperature weather climate features and its circulation for statistical analysis . The results showed that: (1) Hami City hot weather had obvious time-varying characteristics, the period from 1961 to 1993 is less than normal, more obvious after 1994, but almost 14 a was straight upward trend, which is consistent with the global warming trend.(2)the average annual temperature near 54a number of days was 35d in Hami city,mainly concentrated from June to August,while the most was in July.(3)high temperature days have obvious interannual variability, up to 2002 appear 60d, at least for 11 d only appeared in 1993.(4) Xinjiang ridge ,Iran and the west Pacific subtropical high strength and location with the hot weather had a good corresponding relationship, Hami persistent hot weather processes in 500hPa height field mainly for three types of circulation: Westpac developmental westward extension of the subtropical high, Iranian Deputy high toshin developmental, western Pacific subtropical high of west development and Iran to t the reach development work together.