AUTHOR=Yun Qiuhao , Zhang Qiang TITLE=Spatiotemporal variation characteristics of extreme temperature events in Hainan Province over the past four decades JOURNAL=Frontiers in Environmental Science VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1510445 DOI=10.3389/fenvs.2025.1510445 ISSN=2296-665X