2019年内蒙古高温天气统计分析

Statistical Analysis on High Temperature Weather in Inner Mongolia in 2019

文章详细分析2019年内蒙古119个气象观测站逐小时自动观测中出现的气温≥35.0℃的高温情况以及对应的温压场。结果表明:全年出现≥35.0℃高温天气的有63个站,共306次,站点主要分布在阿拉善盟和乌海市以及赤峰市东部和通辽市中部等地;5—8月均有高温天气发生,7月最多;日最高气温主要出现在15—17时,呈单峰型,16时最多;分析高温站次超过15次的日期,发现没有全区性的高温天气;只有一天出现极端高温事件,且没有一个站高温超过历史极值;高温发生时500 hPa受高压(脊)控制,850 hPa处于暖区,地面处于低压区,地面风速多在4.0 m·s^(-1)以上,多高于日平均风速,最高气温出现时风速> 10.0 m·s^(-1)的有7站次。

The statistical analysis of the high temperature weather that the highest temperature is higher than 35℃has done in this paper using hourly data set of automatic observational data of 119 national weather station in Inner Mongolia.The results indicate that there are 306 hot days(≥35℃)in 63 national weather station over the whole year.The sites are mainly distributed in Alashan League,Wuhai City,east of Chifeng City,central Tongliao City.The high temperature from May to August,mostly occurring in July.The highest daily temperature is mainly from 15 to 17,which is single peak type,and the highest is at 16.Analyzing the date of more than 15 high temperature stations,there is no regional high temperature weather.There is only one day of extreme high temperature event,and no station has high temperature exceeding the historical extreme value.When high temperature occurs,high altitude corresponds to high pressure(ridge),low level is in warm zone with the ground air pressure reduced.The surface wind speed is more than 4 m·s^(-1),which is higher than the average daily wind speed.When the maximum temperature occurs,the wind speed exceeds 10 m·s^(-1) up to 8 stations.