海洋地质与第四纪地质2024，Vol.44Issue(4)：16-31,16.DOI:10.16562/j.cnki.0256-1492.2024062802
渐新世-中新世东南亚干湿气候格局演变及驱动机制
Preliminary study on Oligo-Miocene hydrological changes in Southeast Asia and their driving mechanisms
摘要
Abstract
The closure of the Indonesian Seaway played a key role in the evolution of the Indo-Pacific Warm Pool and associated atmospheric circulation during the Cenozoic.However,the relationship between the closure of the seaway,the evolution of the warm pool,and the shift in atmospheric circulation remains unclear due to poor constraints in tectonic and paleoenvironmental reconstructions.This study reviews the historical literature,including evidence from pollen records,coal deposits,shallow marine carbonate deposits,and biogeographic evolution.The results show that the hydroclimate in Southeast Asia underwent significant changes during the Oligo-Miocene transition,shifting from relatively dry conditions in the Oligocene to persistently wet conditions throughout the Miocene.Combined with recent simulation studies,it was concluded that the hydrological changes in Southeast Asia were influenced by both global and regional factors.The narrowing and closure of the seaway may have increased the gradient between the east-west thermocline depth and the east-west sea surface temperature in the Pacific Ocean,limiting the exchange of subsurface water between the Pacific and Indian Oceans.This in turn led to a strengthening of the Walker Circulation,which subsequently induced hydrological changes in Southeast Asia after the Oligo-Miocene boundary and mitigated the effects of global cooling over the Late Miocene.Uncertainties remain in current studies,and more geological records and simulation studies in the future would help to accurately characterize the relationship between seaway closure,warm pool evolution,and atmospheric circulation in the Oligo-Miocene.关键词
水文循环/东南亚/渐新世-中新世/印尼海道/印度-太平洋暖池Key words
hydrological cycle/Southeast Asia/Oligocene-Miocene epoch/Indonesian Seaway/Indo-Pacific Warm Pool分类
海洋科学引用本文复制引用
胡建雄,黄恩清,田军..渐新世-中新世东南亚干湿气候格局演变及驱动机制[J].海洋地质与第四纪地质,2024,44(4):16-31,16.基金项目
国家重点研发计划"新近纪晚期印太暖池地区海道关闭与高纬冰盖演变的耦合机制研究"(2023YFF0803902) （2023YFF0803902）
