何鹏^1,,
刘健^1,2,3,,,
刘斌¹,
宁亮^1,3,4,
严蜜^1,3
1. 虚拟地理环境教育部重点实验室, 江苏省地理环境演化国家重点实验室培育建设点, 江苏省地理信息资源开发与利用协同创新中心, 南京师范大学地理科学学院, 江苏 南京 210023
2. 江苏省大规模复杂系统数值模拟重点实验室, 南京师范大学数学科学学院, 江苏 南京 210023
3. 青岛海洋科学与技术国家实验室海洋-气候-同位素模拟开放工作室, 山东 青岛 266237
4. 中国科学院地 球环境研究所, 黄土与第四纪地质国家重点实验室, 陕西 西安 710061

基金项目: 国家重点基础研究发展计划项目（批准号：2016YFA0600401）、国家自然科学基金项目（批准号：41420104002、41671197和41631175）、江苏省高校优势学科建设工程项目（批准号：164320H116）和中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金专项项目（批准号：SKLLQG1820）共同资助


详细信息

作者简介: 何鹏, 男, 30岁, 博士研究生, 古气候模拟研究, E-mail:hepeng8812@163.com

通讯作者: 刘健, E-mail:jliu@njnu.edu.cn

中图分类号: P467;P534.63⁺2;P532

收稿日期:2019-03-19
修回日期:2019-07-13
刊出日期:2019-11-30

Comparison of changes of Northern Hemisphere monsoon precipitation between two typical abrupt climate events in Holocene

He Peng^1,,
Liu Jian^1,2,3,,,
Liu Bin¹,
Ning Liang^1,3,4,
Yan Mi^1,3
1. Key Laboratory for Virtual Geographic Environment of Ministry of Education/State Key Laboratory of Geographical Evolution of Jiangsu Provincial Cultivation Base/School of Geography Science, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing 210023, Jiangsu
2. Jiangsu Provincial Key Laboratory for Numerical Simulation of Large Scale Complex Systems/School of Mathematical Science, Nanjing Normal University, Nanjing 210023, Jiangsu
3. Open Studio for the Simulation of Ocean-Climate-Isotope, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237
4. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Science, Xi'an 710061, Shaanxi


More Information

Corresponding author: Liu Jian,E-mail:jliu@njnu.edu.cn

MSC: P467;P534.63⁺2;P532

--> Received Date: 19 March 2019
Revised Date: 13 July 2019
Publish Date: 30 November 2019


摘要
摘要:利用通用气候系统模式（Community Climate System Model version 3，简称CCSM3）模拟的TraCE-21ka全新世以来的试验数据，分析了全新世两次突变事件（8.2 ka B.P.和4.2 ka B.P.）前后（分别为9200~8800 a B.P.、8800~8000 a B.P.和4800~4500 a B.P.、4500~4000 a B.P.）北半球夏季（6~8月）气温和季风降水的时空变化特征，并通过对比4个单因子（地球轨道参数、温室气体浓度、大陆冰盖和淡水注入）敏感性试验结果来分析北半球季风降水变化的成因。结果表明：1）两次典型突变事件前后欧亚大陆中高纬大范围的地表气温均明显下降，但是8.2 ka B.P.事件的降温程度大于4.2 ka B.P.事件，此外，在8.2 ka B.P.事件下北美中部有明显的增温，而在4.2 ka B.P.事件下该地区为降温；2）两次典型突变事件前后的北半球季风降水变化的空间分布类似，主要表现为北美季风区、北非季风区西部和印度季风降水一致减少，而东亚季风降水呈现"南涝北旱"的分布型；3）两次典型突变事件前后环流场变化的空间型相似，但是4.2 ka B.P.事件的环流强度变化明显弱于8.2 ka B.P.事件；4）8.2 ka B.P.事件下北半球季风降水变化主要是淡水注入所导致，而4.2 ka B.P.事件主要由于地球轨道参数和气候系统内部变率的共同影响。
关键词: 全新世/
突变事件/
北半球/
季风降水

Abstract:Based on the results of TraCE-21ka simulated by Community Climate System Model version 3 (CCSM3), the spatial pattern of the Northern Hemisphere summer (JJA) temperature and monsoon precipitation changes of two typical abrupt climate changes in the "8.2 ka B. P. event" (9200~8800 a B.P. versus 8800~8000 a B. P.) and the "4.2 ka B. P. event" (4800~4500 a B.P. versus 4500~4000 a B. P.) were analyzed. Through comparing with four single-forcing experiments (Orbital Forcing, Atmospheric Greenhouse Gases, Ice Sheets and Meltwater Forcing), the possible mechanism of the changes of Northern Hemisphere summer monsoon precipitation were discussed as well. The results showed that:(1) The surface temperature dropped significantly over the mid-high latitudes of the Eurasian continent when two typical abrupt climate events occurred, but the 8.2 ka B. P. event cooled greater than the 4.2 ka B. P. event. In addition, there is significant temperature increase in the central North America under the 8.2 ka B. P. event, but the area is cooling down in the 4.2 ka B. P. event. (2) The spatial distribution of monsoon precipitation in the Northern Hemisphere was similar for two typical abrupt climate events. The precipitation of the North American monsoon, west of North African monsoon and the Indian monsoon presented consistent reduction. The East Asian monsoon precipitation presented a dipole pattern of "Southern-flood and Northern-drought". (3) The spatial pattern of the atmospheric circulation was similar for two typical abrupt climate events, but the intensity of the atmospheric circulation of the 4.2 ka B. P. event is significantly weaker than the 8.2 ka B. P. event. (4) The Northern Hemisphere monsoon precipitation change for the 8.2 ka B. P. event was mainly caused by freshwater injection, while the Northern Hemisphere monsoon precipitation was mainly affected by the changes of orbital forcing and internal variability for the 4.2 ka B. P. event.
Key words:Holocene/
abrupt climate event/
Northern Hemisphere/
monsoon precipitation



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