生态环境学报2025，Vol.34Issue(12)：1909-1918,10.DOI:10.16258/j.cnki.1674-5906.2025.12.008
基于年度热浪强度指数的海南岛热浪变化特征研究
The Characterization of Heat Wave Changes in Hainan Island Based on the Annual Heatwave Magnitude Index
摘要
Abstract
As a tropical region affected by regional warming,Hainan Island has been threatened by an increase in the frequency and intensity of heatwave events,including local human health,ecological environment,and economic development.However,current research is still limited by the understanding of the extreme impacts of heatwaves and long-term climate change trends related to heatwaves on islands.Previous studies have employed the Heat Wave Magnitude Index(HWMI)to assess heat wave changes using the maximum values from annual heat wave events,which may underestimate their cumulative effects over one year.In this study,we modified the HWMI algorithm to comprehensively calculate the annual heatwave magnitude index(AHWMI)and aggregate the magnitude of all heatwave events occurring in a single year.We then analyzed the trends in heatwave changes on Hainan Island from 1980‒2021.Hainan Island has experienced significant climate warming,with an average temperature increase of 7.9℃from 1980‒2021.Concurrently,the frequency and duration of heatwave events have increased rapidly,and the seasonal scope of heatwave impacts has expanded from spring and summer in the 1980s to autumn in the 2010s.Heatwave intensity also increased from 1980 to 2021,with the increase rate of HWMI and AHWMI increasing at rates of 0.08 and 0.3 per decade,respectively.The spatial distribution of the overall heatwave intensity on Hainan Island was heterogeneous,with a significantly higher intensity in the western part of the island than in the east.The highest heatwave intensity was observed in the island's southwest,which may also be linked to frequent droughts in this region.Trend analysis further revealed that the areas with the most rapid increases in heatwave intensity were primarily in the southwest and northeast regions.Extreme heatwave events on Hainan Island have occurred frequently in recent years,and the total number of extreme heatwaves recorded between 2011 and 2021 accounted for 67%of the total number over the entire 1980-2021 period.The heatwave that struck in May 2021 reached historical highs in terms of intensity and impact duration.Therefore,Hainan Island must optimize its heatwave disaster mitigation and prevention measures to adapt to the new challenges posed by heatwave situations.关键词
海南/高温热浪/热浪指数/时空动态Key words
climate change/heat wave indices/heat wave intensity/Hainan Province分类
资源环境引用本文复制引用
胡永红,袁艳峰,徐榕焓,艾金龙,侯美亭..基于年度热浪强度指数的海南岛热浪变化特征研究[J].生态环境学报,2025,34(12):1909-1918,10.基金项目
海南省自然科学基金创新团队项目(422CXTD532) （422CXTD532）
国家自然科学基金项目(42471360) （42471360）
中国气象局气象能力提升联合研究专项(23NLTSQ010) （23NLTSQ010）
益阳职业技术学院"曙光计划"重点项目(YYZYSZ2023004) （YYZYSZ2023004）
