同位素2026，Vol.39Issue(3)：199-209,11.DOI:10.7538/tws.2026.youxian.017
西双版纳台风期降雨δ2H和δ18O特征及控制因素
Characteristics and Controlling Factors of δ2H and δ18O in Typhoon Precipitation in the Xishuangbanna Region
摘要
Abstract
Extreme rainfall events occur frequently under the background of global climate changes.As an important contributor to extreme rainfall,typhoons exert significant impacts on regional environment and social economy.Xishuangbanna,located in the southernmost tropical region of Yunnan province,serves as the terminal affected area of westward-moving typhoons.Investigating precipitation δ2H and δ18O in this region can provide a scientific basis for deciphering the water vapor transport pathway and controlling mechanism of typhoons in tropical China.In this study,rainfall samples were collected before,during,and after multiple typhoon events in Xishuangbanna from 2021 to 2024.Combined with the HYSPLIT backward trajectory model and meteorological data,the temporal variations and dominant controlling factors of δ2H and δ18O in precipitation were analyzed.The results show that the δ2H and δ18O in typhoon-related rainfall exhibited a distinct three-stage variation pattern with a unique delayed depletion feature,which usually occured 1-3 days after the typhoon.The depletion magnitude of δ2H and δ18O in rainfall was mainly controlled by typhoon intensity and the distance between the typhoon low-pressure center and the study region.The correlations between precipitation isotopes and local meteorological factors were more weak with the increasing typhoon intensity,and the influences of local meteorological factors were completely masked during the super typhoons.This study filled the research gap of δ2H and δ18O in typhoon-related rainfall in Xishuangbanna,and provided implications for understanding the disturbance of typhoons on inland water cycle processes and optimizing regional water resource management.关键词
热带雨林/台风降雨事件/氢氧稳定同位素/后向轨迹/水汽来源Key words
tropical rainforest/typhoon rainfall event/hydrogen and oxygen stable isotopes/backward trajectory/water vapor source分类
能源科技引用本文复制引用
孙艳,杨斌,严雪琴,黄丽,孟宪菁,刘文杰,宋亮..西双版纳台风期降雨δ2H和δ18O特征及控制因素[J].同位素,2026,39(3):199-209,11.基金项目
国家自然科学基金项目(32371608) （32371608）
中国科学院西双版纳热带植物园"十四五"科技创新规划项目(E32KFF7B01) （E32KFF7B01）
中国科学院青年创新促进会项目(2021397) （2021397）
国家留学基金项目(202204910108). （202204910108）
