孙炜毅^1,,
刘健^1,2,3,,,
万凌峰¹,
宁亮^1,3,4,
严蜜^1,3,4
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试点国家实验室, 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：41971108、41942033、41971021和41671197）、江苏省高校优势学科建设项目（批准号：164320H116）及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项目（批准号：SKLLQG1820和SKLLQG1930）共同资助


详细信息

作者简介: 孙炜毅, 男, 29岁, 讲师, 古气候模拟研究, E-mail:leosunweiyi@126.com

通讯作者: 刘健, E-mail:jliu@njnu.edu.cn

中图分类号: P532;P426.6

收稿日期:2020-07-25
修回日期:2020-09-15
刊出日期:2020-11-30

Simulation of northern hemisphere mid-latitude precipitation response to different external forcings during the Holocene

Sun Weiyi^1,,
Liu Jian^1,2,3,,,
Wan Lingfeng¹,
Ning Liang^1,3,4,
Yan Mi^1,3,4
1. Key Laboratory for Virtual Geographic Environment of Ministry of Education, State Key Laboratory Cultivation Base of Geographical Environment Evolution of Jiangsu Province, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Geography Science, 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, Shandong
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: P532;P426.6

--> Received Date: 25 July 2020
Revised Date: 15 September 2020
Publish Date: 30 November 2020


摘要
摘要:北半球中纬度（30°~50°N）降水变化一直是当今社会关注的热点。文章基于重建资料、气候系统模式CCSM开展的TraCE-21 ka瞬变试验和地球系统模式CESM完成的NNU-12k瞬变加速气候模拟试验结果，探讨了全新世以来中纬度降水变化趋势及其对外强迫的响应。结果表明：全新世以来重建的中纬度降水呈增加趋势，在距今10~7 ka，TraCE-21 ka全强迫试验模拟出了这一趋势，主要受陆地冰盖衰退、淡水注入和轨道参数（ORB）的共同影响。在7~0 ka，NNU-12k的ORB试验与重建的降水增加趋势一致，但主要集中在海洋地区。两个模式均模拟出了欧亚大陆中纬度地区比北美大陆干燥的趋势特点，并发现是ORB的作用引起的；而温室气体（GHGs）主要对欧亚大陆降水增强有所贡献，但不能抵消ORB的负贡献。然而，模拟的中纬度降水对全新世以来ORB、GHGs的响应存在模式依赖性，这是今后重建-模拟资料对比时需要考虑的重要因素。
关键词: 全新世/
中纬度降水/
重建-模拟资料对比/
轨道参数/
温室气体

Abstract:The Northern Hemisphere(NH) mid-latitude precipitation(30°~50°N) change is the focus of social attention. Using the reconstructions, the results of TraCE-21 ka experiments simulated by the Community Climate System Model 3(CCSM3), and the results of NNU-12k transient acceleration experiments simulated by Community Earth System Model(CESM), this study discuss the change of NH mid-latitude precipitation and its response to external forcing during the Holocene. The result shows that the reconstructed NH mid-latitude precipitation has increased since the Early Holocene. During 10~7 ka B.P., a similar increasing trend occurs in the TraCE-21 ka all forcing experiment, which is mainly affected by the ice sheet recession, fresh water injection and orbit forcing(ORB). During 7~0 ka, the precipitation shows an increase trend in NNU-12k ORB experiment, which is consistent with the reconstructions, but the trend is concentrated in marine areas. Both models simulate a stronger drying trend over mid-latitude Eurasia than North America, which is induced by the ORB. Greenhouse gases(GHGs) mainly contribute to the enhanced precipitation in Eurasia, but it cannot offset the negative contribution of the ORB. However, during the Holocene, the response of simulated NH mid-latitude precipitation to ORB and GHGs is model dependent, which can be an important factor to be considered in the proxy-model data comparison.
Key words:Holocene/
mid-latitude precipitation/
proxy-model data comparison/
orbital forcing/
greenhouse gases



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