Reconstructing early Eocene(～55 Ma) paleogeographic boundary conditions for use in paleoclimate modelling  

作　　者：Zhilin HE Zhongshi ZHANG Zhengtang GUO 

机构地区：[1]Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [2]University of Chinese Academy of Sciences, Beijing 100049, China [3]Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China [4]NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen 5007, Norway [5]Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China [6]CAS Center for Excellence in Life and Paleoenvironment, Beijing 100044, China

出　　处：《Science China Earth Sciences》2019年第9期1416-1427,共12页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41690114, 41888101 & 41430531)

摘　　要：The early Eocene is a period with very high atmospheric CO2 levels, which receives many interests from climate modelling aspects. To simulate the early Eocene paleoclimate, a realistic reconstruction for land-sea distribution, paleotopography and paleobathymetry is the fundamental step. Here, we present global paleogeographic reconstructions for the early Eocene(~55 Ma), based on integrated paleogeographic data set, the plate-tectonic reconstruction software(GPlates) and geographic information system software(ArcGIS). Comparing with previous paleogeographic reconstructions, we improve the reconstructions by incorporating many recent geologic data and data set, including:(1) Better representations of the Tethys Sea,some marginal or inland seas in the East and Southeast Asia, Atlantic and Arctic region, and the Drake Passage and Tasmanian Gateway;(2) integrated paleoelevation data of global high plateaus and mountains, especially the paleotopography of East Asia,and adopting the latest paleotopographic reconstruction data of the Antarctica;and(3) using the latest data set of oceanic crust paleo-age and oceanic sediment thickness to reconstruct the paleobathymetry.The early Eocene is a period with very high atmospheric CO2 levels, which receives many interests from climate modelling aspects. To simulate the early Eocene paleoclimate, a realistic reconstruction for land-sea distribution, paleotopography and paleobathymetry is the fundamental step. Here, we present global paleogeographic reconstructions for the early Eocene（～55 Ma）, based on integrated paleogeographic data set, the plate-tectonic reconstruction software（GPlates） and geographic information system software（ArcGIS）. Comparing with previous paleogeographic reconstructions, we improve the reconstructions by incorporating many recent geologic data and data set, including:（1） Better representations of the Tethys Sea,some marginal or inland seas in the East and Southeast Asia, Atlantic and Arctic region, and the Drake Passage and Tasmanian Gateway;（2） integrated paleoelevation data of global high plateaus and mountains, especially the paleotopography of East Asia,and adopting the latest paleotopographic reconstruction data of the Antarctica; and（3） using the latest data set of oceanic crust paleo-age and oceanic sediment thickness to reconstruct the paleobathymetry.

关 键 词：Paleogeographic reconstruction LAND-SEA distribution PALEOTOPOGRAPHY Paleobathymetry Early EOCENE PALEOCLIMATE modelling 

分 类 号：P[天文地球]