1980—2017年四川省气候变化综合区划

基于四川省1980—2017年主要气象要素观测资料,运用ArcGIS空间分析法,分别探讨了气温、降水量和极端气候指数的年际空间变化特征;同时建立极端气候指标体系,结合熵权法、模糊综合评价法开展综合极端气候指数区划,最终完成1980—2017年四川省气候变化综合区划。研究表明:1980—2017年四川省极端气候事件的发生率呈上升趋势,从区域分布上大致表现为东高西低;根据四川省气温和降水量变化速率区划、综合极端气候指数区划,将四川省划分为6个气候变化区,其中,川东北地区综合气候变化速率最快。

Comprehensive division of climate change in Sichuan Province from 1980 to 2017

Based on the observations of major meteorological elements in Sichuan Province from 1980 to 2017, the spatial analysis method of ArcGIS was used to discuss the inter-annual spatial changes of temperature, precipitation, and extreme climate index separately. At the same time, an extreme climate index system was established to carried out comprehensive extreme climate index zoning through combining Entropy weight method and fuzzy comprehensive evaluation method. Finally, the Sichuan Province''s comprehensive climate change zoning from 1980 to 2017 was completed. Results show that the incidence of extreme climate events in Sichuan Province presents increasing trend from 1980 to 2017, and the regional distribution is generally high in the east and low in the west. According to the regionalization of temperature and precipitation change rate and comprehensive extreme climate index, Sichuan Province is divided into six climate change regions. Among them, the northeast Sichuan region has the fastest comprehensive climate change rate, mainly including Nanchong, Guangyuan, Guang''an, Bazhong, Dazhou, and Suining.