Progress in rapid climate changes and their modeling study in millennial and centennial scales |
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| Authors: | Liya Jin and Fahu Chen |
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| Institution: | (1) Key Laboratory of Western China’s Environmental Systems (Ministry of Education), Center for Arid Environment and Paleoclimate Research, Lanzhou University, Lanzhou, 730000, China |
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| Abstract: | Rapid climate change at millennial and centennial scales is one of the most important aspects in paleoclimate study. It has
been found that rapid climate change at millennial and centennial scales is a global phenomenon during both the glacial age
and the Holocene with amplitudes typical of geological or astronomical time-scales. Simulations of glacial and Holocene climate
changes have demonstrated the response of the climate system to the changes of earth orbital parameter and the importance
of variations in feedbacks of ocean, vegetation, icecap and greenhouse gases. Modeling experiments suggest that the Atlantic
thermohaline circulation was sensitive to the freshwater input into the North Atlantic and was closely related to the rapid
climate changes during the last glacial age and the Holocene. Adopting the Earth-system models of intermediate complexity
(EMICs), CLIMBER-2, the response of East Asian climate change to Dansgaard/Oeschger and Heinrich events during the typical
last glacial period (60 ka B.P.-20 ka B.P.) and impacts of ice on the Tibetan plateau on Holocene climate change were stimulated,
studied and revealed. Further progress of paleoclimate modeling depends on developing finer-grid models and reconstructing
more reliable boundary conditions. More attention should be paid on the study of mechanisms of abrupt climatic changes as
well as regional climate changes in the background of global climate change.
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Translated from Advances in Earth Science, 2007, 22(10): 1054–1065 译自: 地球科学进展] |
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| Keywords: | rapid climate change paleoclimate modelling mechanism of climate change |
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