| 中国21kaBP气候模拟的初步试验 |
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| 引用本文： | 陈星,于革,刘健.中国21kaBP气候模拟的初步试验[J].湖泊科学,2000,12(2):154-164. |
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| 作者姓名： | 陈星 于革 刘健 |
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| 作者单位： | 1. 南京大学大气科学系 210093 南京210093
2. 中国科学院南京地理与湖泊研究所南京210008 |
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| 基金项目： | 中国科学院 1 998年“百人计划”(南京地理与湖泊研究所“古湖泊与古气候模拟”课题 )资助 |
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| 摘 要： | 本文使用含有陆面过程的９层大气环流谱模式（ＡＧＣＭ＋ＳＳｉＢ），在地球轨道参数和下垫面边界条件驱动下，对２１ｋａＢＰ的气候进行模拟试验。结果表明，２１ｋａＢＰ时中国东部干旱，西部和青藏高原湿润，全国普遍降温。该模拟结果基本捕捉了由古湖泊资料和孢粉资料重建的气候特征。对模式输出的大气环流场和降水场的分析揭示出，２１ｋａＢＰ东亚夏季风环流明显减弱，而青高原夏季风环流增强；冬季风环流较现在略有增强。该模
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| 关 键 词： | 21kaBP 气候模拟 青藏高原 季风 古气候 |
| 收稿时间： | 1999/12/17 0:00:00 |
| 修稿时间： | 1999年12月17 |
A Prelimilary Simulation of Climate at 21kaBP in China |
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| CHEN Xing,YU Ge and LIU Jian.A Prelimilary Simulation of Climate at 21kaBP in China[J].Journal of Lake Science,2000,12(2):154-164. |
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| Authors: | CHEN Xing YU Ge and LIU Jian |
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| Institution: | CHEN Xing 1 YU Ge 2 LIU Jian 2 |
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| Abstract: | In this paper, we report a simulation of climate at 21kaBP using AGCM+SSiB with forcing boundary conditions and orbital forcing insolation anomalies. The results show that there were significant decreases in temperature in large scale. The climate at 21kaBP was cold and dry in eastern China and cold and wet in Tibetan Plateau. This simulation catches the basic climate features reconstructed from palaeo lake data and pollen data, and predicts the climate of China at 21ka B.P. The atmospheric circulation and precipitation by model experiments reveal that summer monsoon circulation at 21kaBP in eastern Asia was weakened significantly but the Tibetan Plateau summer circulation system was strengthen. The winter monsoon at 21kaBP was little stronger than today. The simulation is able to sever: (1) It is first time to use a AGCM with physical processes and mechanism to simulate last maximum glacial climate in China and that is consistent with geological evidence basically. (2) The cause of climate significant changes between 21kaBP and present could be understood in dynamical mechanisms, such as changes of solar radiation, ice sheet, surface conditions and feedback interactions among these factors. |
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| Keywords: | kaBP climate simulation Tibetan Plateau monsoon |
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