Objective The Ordovician–Silurian transitional period is a special time when the global paleo-environment changed greatly.It witnessed the first mass extinction as of Phanerozoic period and glaciations that occurred ...Objective The Ordovician–Silurian transitional period is a special time when the global paleo-environment changed greatly.It witnessed the first mass extinction as of Phanerozoic period and glaciations that occurred frequently at a large scale in a very short time,which has thus attracted much attention among geoscientists at home and abroad.展开更多
The current advances in the study of geochemistry and paleo-oceanography of the Co-rich crust are reviewed in this paper. We summarize the study of geochemistry of the Co-rich crust, discuss the diffusion of elements ...The current advances in the study of geochemistry and paleo-oceanography of the Co-rich crust are reviewed in this paper. We summarize the study of geochemistry of the Co-rich crust, discuss the diffusion of elements in the Co-rich crust and the exchange with ambient seawater. Besides, we discuss the effect of phosphatization and substrate rocks on the composition of the Co-rich crust. We also introduce the application of stable isotopes(including the stable isotopes of Pb, Nd, and Hf), radioactive isotopes (including the radioactive isotopes of Be, U and Th), and elements (including the major elements, minor elements and rare earth elements) to the study of paleo-oceanography of the Co-rich crust.展开更多
The environmental evidence regarding the present warming of the global climate is very strong,with convincing evidence of human contribution.However,the effect of the dynamic geology and plate tectonics on these varia...The environmental evidence regarding the present warming of the global climate is very strong,with convincing evidence of human contribution.However,the effect of the dynamic geology and plate tectonics on these variations is often overlooked.Earth global climate is primarily determined by the efficient ability of water to convert solar light into heat and store it.Plate tectonics,describing the shifting geography through geological history,highlights the mobility of the oceans and the continents on the surface of the planet and their impact on climate variability.Since it seems that global warming is a natural phenomenon,mitigating its effects should follow large-scale engineering solutions rather than amelioration of anthropogenic pollution.展开更多
Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14 MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the...Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14 MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the effect of the north shift of Australian continent onthe tropical oceanic circulation, especially the formation ofthe western Pacific warm pool. The numerical experimentsof the individual OGCM forced by the modern atmosphericcirculation indicate that the closure of Indonesian passageresults in warming in the tropical Pacific Ocean and coolingin the tropical Indian Ocean; furthermore, it also results inchange in source of the Indonesian Through Flow (ITF) wa-ter, e.g. ITF mainly originates from the south Pacific at 14MaBP, but it mainly originates from the north Pacific now.The coupled model shows similar results as the individualOGCM qualitatively.展开更多
基金financially supported by the National Natural Science Foundation of China(grant No.4157020610)Science and Technology Program of Guizhou Province,China(No.[2017]1407)
文摘Objective The Ordovician–Silurian transitional period is a special time when the global paleo-environment changed greatly.It witnessed the first mass extinction as of Phanerozoic period and glaciations that occurred frequently at a large scale in a very short time,which has thus attracted much attention among geoscientists at home and abroad.
文摘The current advances in the study of geochemistry and paleo-oceanography of the Co-rich crust are reviewed in this paper. We summarize the study of geochemistry of the Co-rich crust, discuss the diffusion of elements in the Co-rich crust and the exchange with ambient seawater. Besides, we discuss the effect of phosphatization and substrate rocks on the composition of the Co-rich crust. We also introduce the application of stable isotopes(including the stable isotopes of Pb, Nd, and Hf), radioactive isotopes (including the radioactive isotopes of Be, U and Th), and elements (including the major elements, minor elements and rare earth elements) to the study of paleo-oceanography of the Co-rich crust.
文摘The environmental evidence regarding the present warming of the global climate is very strong,with convincing evidence of human contribution.However,the effect of the dynamic geology and plate tectonics on these variations is often overlooked.Earth global climate is primarily determined by the efficient ability of water to convert solar light into heat and store it.Plate tectonics,describing the shifting geography through geological history,highlights the mobility of the oceans and the continents on the surface of the planet and their impact on climate variability.Since it seems that global warming is a natural phenomenon,mitigating its effects should follow large-scale engineering solutions rather than amelioration of anthropogenic pollution.
文摘Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14 MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the effect of the north shift of Australian continent onthe tropical oceanic circulation, especially the formation ofthe western Pacific warm pool. The numerical experimentsof the individual OGCM forced by the modern atmosphericcirculation indicate that the closure of Indonesian passageresults in warming in the tropical Pacific Ocean and coolingin the tropical Indian Ocean; furthermore, it also results inchange in source of the Indonesian Through Flow (ITF) wa-ter, e.g. ITF mainly originates from the south Pacific at 14MaBP, but it mainly originates from the north Pacific now.The coupled model shows similar results as the individualOGCM qualitatively.
