亚洲季风区降水中稳定同位素气候意义研究进展  

REVIEW ON THE STUDY OF CLIMATIC SIGNIFICANCE OF PRECIPITATION ISOTOPE IN ASIAN MONSOON REGION

作　　者：田立德 蔡忠银 邵莉莉 王荻 刘峰 TIAN Lide;CAI Zhongyin;SHAO Lili;WANG Di;LIU Feng(Institute of International Rivers and Eco-security,Yunnan University,Kunming 650500,Yunnan;Yunnan Key Lab of International Rivers and Transboundary Eco-security,Kunming 650091,Yunnan)

机构地区：[1]云南大学国际河流与生态安全研究院,云南昆明650500 [2]云南省国际河流与跨境生态安全重点实验室,云南昆明650091

出　　处：《第四纪研究》2021年第3期856-863,共8页Quaternary Sciences

基　　金：国家自然科学基金项目(批准号:41771043和41530748)资助。

摘　　要：文章回顾了过去30多年围绕亚洲季风区,特别是青藏高原降水与冰芯同位素现代过程研究,对季风区稳定同位素气候意义的认识过程。降水及不同介质氧稳定同位素研究从最早聚焦于降水同位素与当地气候因子之间的关系,即"温度效应"与"降水量效应",发展到大尺度大气环流过程对降水同位素时空变化的影响,进而否定了局地气候因子的控制作用。近些年重要的研究进展之一是明确了与赤道海洋温度变化相关的ENSO对整个亚洲季风区同位素年际年代际波动的影响过程与机制,发现了大尺度大气环流在不同时间尺度稳定同位素记录中的显著信号。这些认识对于亚洲季风区冰芯、石笋、树轮同位素气候意义的解释都具有重要意义。但在不同时间尺度上,影响降水同位素的主导控制因素不同,导致对于解释长时间尺度同位素记录仍存在挑战,有待于从机制和结合同位素分馏的大气环流模型模拟研究中取得新的突破。This paper reviewed the achievement in the understanding of the climatic significance of precipitation isotope in Asian monsoon region in the past three decades,in association with the paleoclimate reconstruction from various isotope archives.In the early stage,most of the study focused on the relationship between precipitation isotopes with the local climate parameters,in particular,with the classic"temperature effect"or"precipitation amount effect."However,increasing modeling and observation works doubted the application of stable isotope"temperature effect"and/or"precipitation effect"in the paleoclimate rebuilding in the following studies.Ice core isotope record in the monsoon region also did not agree with the seasonal relationship in precipitation.These challenges evoked further studies on the dependence of precipitation in Asian monsoon region with the large regional atmospheric circulation and possible different moisture sources."Circulation effect"was suggested in that precipitation isotope linked with different moisture sources,and the distance from the moisture source to precipitation site was in debt.On the Tibetan Plateau,increasing evidence showed that the Indian monsoon and westerly have a strong imprint on both the seasonal and spatial coverage of precipitation isotopes.To reconcile the debate and disagreement in the recognition of precipitation isotope climate significance in the Asian monsoon region,further study found the control of the ENSO cycle by analyzing the relation with tropical sea surface temperature in eastern Pacific Ocean and stable isotopes in precipitation and ice core record.The underlying mechanism is that interannual variations of the tropical sea surface temperature impacts the Walker Circulation and therefore,the interannual changes of convective intensity in the tropical ocean region,depletes(or enriches)heavy isotopes in the atmospheric vapor,subsequently precipitation isotopes as well.The finding of consistent changes of interannual precipitation isotopes highlights the co

关 键 词：降水同位素 气候意义 亚洲季风 古气候重建 ENSO 

分 类 号：P426.612[天文地球—大气科学及气象学]