气候变化研究进展 ›› 2019, Vol. 15 ›› Issue (4): 343-351.doi: 10.12006/j.issn.1673-1719.2018.157

• 气候系统变化 • 上一篇    下一篇

模式内部变率引起的1.5℃和2℃升温阈值出现时间模拟的不确定性研究

季涤非1,刘利1(),李立娟2,孙超1,于馨竹1,李锐喆1,张诚1,王斌1,2   

  1. 1 清华大学地球系统科学系,北京 100084
    2 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京 100029
  • 收稿日期:2018-11-09 修回日期:2019-01-03 出版日期:2019-07-30 发布日期:2019-07-30
  • 通讯作者: 刘利 E-mail:liuli-cess@mail.tsinghua.edu.cn
  • 作者简介:季涤非,女,硕士研究生
  • 基金资助:
    国家重点研发计划项目(2017YFC1501903)

Uncertainties in the simulation of 1.5℃ and 2℃warming threshold-crossing time arising from model internal variability based on CMIP5 models

Di-Fei JI1,Li LIU1(),Li-Juan LI2,Chao SUN1,Xin-Zhu YU1,Rui-Zhe LI1,Cheng ZHANG1,Bin WANG1,2   

  1. 1 Department of Earth System Science, Tsinghua University, Beijing 100084, China
    2 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
  • Received:2018-11-09 Revised:2019-01-03 Online:2019-07-30 Published:2019-07-30
  • Contact: Li LIU E-mail:liuli-cess@mail.tsinghua.edu.cn

摘要:

模式内部变率是模拟结果不确定性的重要来源,然而它对于1.5℃和2℃升温阈值出现时间不确定性的影响尚不清楚。因此,基于耦合模式比较计划第五阶段(CMIP5)的多模式数据研究了模式内部变率对1.5℃和2℃升温阈值出现时间不确定性的影响以及对未来排放情景的敏感性。结果表明,模式内部变率对升温阈值出现时间模拟的影响与外强迫的影响相当,单个模式内部不同成员达到全球平均1.5℃或2℃增温的年份相差2~12年;其影响具有明显的空间差异,影响极大值出现在欧亚大陆以北洋面、白令海峡周围区域、北美东北部及其与格陵兰岛之间的海域、南半球高纬地区等;低排放情景下模式内部变率的影响大于高排放情景。

关键词: CMIP5, 1.5℃和2℃升温, 出现时间, 模式内部变率

Abstract:

Model internal variability has been recognized as an important source of uncertainties of climate simulation results. However, the impact of model internal variability on the uncertainties in the simulation of 1.5℃ and 2℃ warming threshold-crossing time has not been explored to date. In this paper, such impact and the corresponding sensitivity to different future emission scenarios are investigated based on the outputs of Coupled Model Intercomparison Project Phase5 (CMIP5) models. The results show that the effect of internal variability on uncertainties in the simulation of threshold-crossing time is equivalent to that of external forcing. The difference between the threshold-crossing time of model members reaching 1.5℃ or 2℃ global warming is 2-12 years. The influence of internal variability has a clear spatial distribution. Maximum uncertainties are observed at the ocean northern of Eurasia, the area around the Bering Strait, the northeastern North America and the ocean between it and Greenland, and the high latitudes in the Southern Hemisphere. Model internal variability causes greater uncertainties in the low emission scenario than the high emission scenario.

Key words: Coupled Model Intercomparison Project Phase5 (CMIP5), 1.5℃ and 2℃ warming, Threshold-crossing time, Model internal variability

京ICP备11008704号-4
版权所有 © 《气候变化研究进展》编辑部
地址:北京市海淀区中关村南大街46号 邮编:100081 电话/传真:(010)58995171 E-mail:accr@cma.gov.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn