35 ka BP climate simulations in East Asia and probing the mechanisms of climate changes |
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Authors: | Email author" target="_blank">Ge?YuEmail author Yiqun?Zheng Xiankun?Ke |
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Institution: | (1) Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 210008 Nanjing, China;(2) Institute of Meteorology, The Chinese People’s Liberation Army University of Sciences and Technology, 211101 Nanjing, China;(3) Department of Geography, University of Regina, SK S4S0A2, Canada |
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Abstract: | Paleoclimate modeling has become an important tool to detect the future climate of the global warming that is difficult to
be validated. The paleoclimate modeling has to be evaluated by regionally geological data in order to determine if it is able
to reproduce a reality of climate states. Geological evidence shows that there was a warm-wet interstadial at 35000±3000 a
BP in China, which provides an important climate period to be historical analogue for the future climate changes induced by
greenhouse gas emissions. Integrated geological records of later phase of the MSI3 from China also provide basements for evaluation
of 35 ka BP climate modeling. This paper reports the paleoclimate experiments applied by various forces, and validates the
outputs by geological data, consequently improving the boundary conditions in the experiments and making the paleoclimates
more approach the reality. The simulations show an increased temperature in the mid-low latitudes and an extended rain-belt
northwards in East Asia, while a decreased temperature in high latitudes and a strong exchange of the N-S atmospheric circulation.
As there is only ca. 10–15 ka from 35 ka BP to the LGM (21 ka BP) during which climate rapidly changed from a warm-wet interstadial
to a typical ice age, this simulation provides scientific basis to recognize the criteria of global warming and trends of
natural climate development. |
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Keywords: | paleoclimate simulation low-latitude temperature in- crease precipitation belt expending northwards geological data validation East Asia |
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