基于CI指数的阿克苏市气象干旱分析  

Analysis on Meteorological Drought in Aksu City Based on the CI Index

作　　者：袁志伟 YUAN Zhiwei(Xinjiang Toutunhe River Basin Administration Center, Changji 831100, China)

机构地区：[1]新疆头屯河流域管理局水利管理中心,新疆昌吉831100

出　　处：《广东水利水电》2021年第3期35-37,49,共4页Guangdong Water Resources and Hydropower

摘　　要：该文基于1984—2016年的实测月降水和气温数据,采用综合气象干旱指数(CI)对阿克苏市月尺度、季尺度和年尺度的干旱特征进行了分析。结果表明:阿克苏市全年6—8月最湿润,12月至来年2月较干旱;四季中春季旱象最突出,其次是冬季,夏季和秋季相对湿润;33 a各干旱等级在年尺度上分布频次由大到小依次为:特旱>无旱>轻旱>重旱>中旱,阿克苏市的气候干旱情况有向两极化发展的趋势。Based on the measured monthly precipitation and temperature data from 1984 to 2016,the drought characteristics of Aksu city at monthly,seasonal and annual scales were analyzed by using comprehensive meteorological drought index(CI).The results show that:In Aksu City,the humidity from June to August was the highest,and December to February of the next year was relatively dry;Spring drought was the most prominent in four seasons,followed by winter,summer and autumn were relatively wet;In the past 33 years,the distribution frequency of each drought grade on the annual scale from large to small was:extremely drought>no drought>light drought>severe drought>moderate drought.The climate drought situation in Aksu city tends to be polarized.

关 键 词：综合气象干旱指数 干旱等级 阿克苏市 时间尺度 

分 类 号：P426.616[天文地球—大气科学及气象学]