A transient shift in equatorial hydrology and vegetation during the Eocene Thermal Maximum 2  

作　　者：Gaurav Srivastava Harshita Bhatia Poonam Verma Yogesh P.Singh Shailesh Agrawal Torsten Utescher R.C.Mehrotra 

机构地区：[1]Birbal Sahni Institute of Palaeosciences,53 University Road,Lucknow 226007,India [2]Academy of Scientific and Innovative Research(AcSIR),Ghaziabad 201002,India [3]Senckenberg Research Institute and Natural History Museum,Frankfurt/M.,Senckenberg Research Station of Quaternary Palaeontology,Weimer,Germany [4]Institute for Geosciences,University of Bonn,Nussallee 8,53115 Bonn,Germany

出　　处：《Geoscience Frontiers》2024年第5期174-181,共8页地学前缘（英文版）

基　　金：In-house project no.3 at the Birbal Sahni Institute of Palaeosciences.

摘　　要：The equatorial evergreen forests nourish the world’s biodiversity hotspots and are considered the lungs of the Earth.However,their future survival is uncertain,due to anthropogenically increased carbon emissions and changes in the hydrological cycle.Understanding the changes in the hydrological cycle in the equatorial region due to an increase in carbon emission is of prime importance.The early Paleogene hyperthermal events are potential analogs to understand the consequences of high carbon emission on the hydrological cycle.In this communication,we quantify the terrestrial seasonal climate using the plant proxy and infer that during the Eocene Thermal Maximum 2 when atmospheric carbon dioxide concentration was>1000 ppmv near the palaeo-equator(~0.6°N),the rainfall decreased significantly,leading to the expansion of deciduous forests.This study raises important questions about the future survival of equatorial rainforests and biodiversity hotspots under increased carbon emissions.

关 键 词：Coexistence approach Climate ETM-2 Global warming Hyperthermal PALEOGENE 

分 类 号：P736.22[天文地球—海洋地质]