蔡忠银1,
邵莉莉1,
王荻1,
刘峰1
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
基金项目: 国家自然科学基金项目（批准号：41771043和41530748）资助
详细信息
作者简介: 田立德, 男, 52岁, 研究员, 自然地理学专业, E-mail:ldtian@ynu.edu.cn
中图分类号: P426.612 收稿日期:2021-01-08
修回日期:2021-03-10
刊出日期:2021-05-30
Review on the study of climatic significance of precipitation isotope in Asia monsoon region
TIAN Lide1,2,,CAI Zhongyin1,
SHAO Lili1,
WANG Di1,
LIU Feng1
1. Institute of International Rivers and Eco-security, Yunnan University, Kunming 650500, Yunnan
2. Yunnan Key Lab of International Rivers and Transboundary Eco-security, Kunming 650091, Yunnan
MSC: P426.612
--> Received Date: 08 January 2021
Revised Date: 10 March 2021
Publish Date: 30 May 2021
摘要
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。
关键词: 降水同位素/
气候意义/
亚洲季风/
古气候重建/
ENSO
Abstract: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 comparable isotope records in various isotope archives in both the Indian monsoon region and East Asian monsoon region, and therefore, shed light on the climate rebuilding from ice core record, as least for the high frequency interannual variation and possibly on the global scale. However, the mechanism controlling precipitation isotopes probably varies in different time scale, and we are aware that the ENSO controlling on the interannual precipitation isotopes in Asian monsoon region probably will not hold for long-term variation recorded in various archives as ice core, stalagmite and tree ring isotope records. Therefore, there is still a long way to go for the challenge in the understanding of the long-term isotope record in different archives and further effect such as GCM coupled with water isotope may help in the mechanism of the control on long-term precipitation isotope change in history.
Key words:precipitation isotope/
climatic significance/
Asian monsoon/
paleoclimate reconstruction/
ENSO
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