利用2020年5—7月中国气象局陆面数据同化系统（CLDAS）的5 km×5 km小时再分析数据,结合2020年新疆南部小麦种植区的作物发育期资料,细化了基于小时气象要素的干热风定义,整理出区域内每个格点精确到小时的干热风数据,分析了新疆南部区域的轻、中、重度高温低湿型和旱风型干热风精细化特征。结果表明：（1） 新疆南部区域的轻、中、重度高温低湿型和旱风型干热风的格点平均日数分别为31.0 d、13.8 d、10.7 d和3.6 d;格点平均小时数分别为151.2 h、54.6 h、41.2 h和11.3 h。若羌、哈密和吐鲁番盆地是干热风日数、小时数和干热风综合强度等指标高值区。（2） 区域高温低湿型干热风平均时数≥6.5 h的高发日集中在6月下旬、7月上旬和中旬。区域旱风型干热风平均时数≥4.0 h高发日主要出现在5月、6月中旬和7月上旬。在每天的18：00高温低湿型干热风落区面积最大,19：00旱风型干热风落区面积最大。（3） 新疆南部区域,轻、中、重度高温低湿型和旱风型干热风过程平均次数分别为12.7次、7.9次、5.7次和2.5次,干热风过程最长持续日数平均值分别为8.4 d、3.5 d、2.7 d和1.2 d。该区域的干热风范围广、过程次数多、过程持续日数长,干热风防御需引起足够重视。

The paper using 5 km of CLDAS from May to July 2020 grid hour data and wheat growth data in 2020, the definition of dry-hot wind based on hourly meteorological elements was refined, sort out the hourly dry-hot wind data of each grid, detailed analysis of the characteristics of high temperature and low humidity (light, medium and heavy) and dry wind types dry-hot wind in southern Xinjiang. The results show that: (1) The average cumulative days of four degrees dry-hot wind were 31.0,13.8,10.7, and 3.6 days, and the average cumulative hours were 151.2, 54.6, 41.2, and 11.3 h, the high value areas of dry-hot wind days, hours and comprehensive strength index were located in Ruoqiang, Hami and Turpan regions. (2) The days with average hours of high temperature and low humidity dry-hot wind≥6.5 h were concentrated in late June, early and mid-July, the days with dry wind type dry-hot wind average hours≥4 h were concentrated in May, mid-June and early July, the largest areas of high temperature and low humidity type at 18:00 and dry wind type at 19:00 every day. (3) Analysis of dry-hot wind process distribution, the average cumulative times of four degrees dry-hot wind were 12.7, 7.9, 5.7, and 2.5 times, the average longest duration days were 8.4, 3.5, 2.7, and 1.2 days. The dry-hot wind have large areas, many times, long duration days and strong process. Therefore, enough attention should be paid to the defense of dry-hot wind.