Advances in Earth Science ›› 2007, Vol. 22 ›› Issue (10): 1054-1065. doi: 10.11867/j.issn.1001-8166.2007.10.1054

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Progress in Rapid Climate Changes and Their Modeling Study in Millennial and Centennial Scales

JIN Li-ya, CHEN Fa-hu   

  1. Key laboratory of Western China's Environmental Systems, Center for Arid Environment and Paleoclimate Research, Lanzhou University, Lanzhou 730000, China
  • Received:2007-08-15 Revised:2007-09-11 Online:2007-10-15 Published:2007-10-10

JIN Li-ya, CHEN Fa-hu. Progress in Rapid Climate Changes and Their Modeling Study in Millennial and Centennial Scales[J]. Advances in Earth Science, 2007, 22(10): 1054-1065.

Rapid climate changes at millennialand centennial scales are one of the most important aspects in Paleoclimate study. It has been found that rapid climate changes at millennial and centennial scales are a global phenomenon during both the glacial age and the Holocene with amplitudes typical for geological or astronomical time-scales. Simulations of glacial and Holocene climate changes have demonstrated the response of climate system to the Earth orbital forcing and the importance of variations in feedbacks of ocean, vegetation cover, continental ice sheets and greenhouse gases. Modeling experiments suggest that the Atlantic thermohaline circulation was sensitive to the freshwater inputting into the North Atlantic and was closely related to the rapid climate changes during the last glacial age and the Holocene. By using 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(60~20kyrBP)and impacts of snow and glaciers over the Tibetan Plateau on Holocene climate change were studied. Further progress of paleoclimate modeling depends on developing finer-grid models and reconstructing more reliable boundary conditions. More attentions should be paid to the study of mechanisms of abrupt climate changes as well as regional climate changes on the basis of global climate change.

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