[张贴报告]Evaluation and attribution of historical surface air temperature changes over China simulated by coupled and uncoupled models

Evaluation and attribution of historical surface air temperature changes over China simulated by coupled and uncoupled models
编号:2371 稿件编号:1160 访问权限:私有 更新:2023-04-11 17:02:22 浏览:468次 张贴报告

报告开始:2023年05月06日 08:23 (Asia/Shanghai)

报告时间:1min

所在会议:[SP] 张贴报告专场 » [SP-13-1] 13、大气物理与气象气候

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摘要
The increase in the average surface air temperature anomaly (SATA) over China is stronger than the global average. However, the accurate simulation and attribution of regional SATA evolution remain challenging for current global climate models. This study simulates historical SATA variations over China using the coupled (FGOALS-g3) and uncoupled (atmospheric component, GAMIL3) models and examines their possible causes. Results show that both models reproduce the historical SATA variation with higher correlation coefficients (0.735 and 0.782) than many global climate models (0.25 - 0.56), although they are somewhat over- or underestimate changes in different periods. In particular, the cooling trend during 1941–1970 is well simulated by the coupled model but poorly presented in the uncoupled model. In addition, the coupled simulations produce stronger long-term trends than the uncoupled ones during 1870-2014 by allowing full interaction between the atmosphere, ocean, and sea ice. In contrast, the uncoupled simulations reproduce better decadal and multi-decadal SATA variations owing to the constraints of the observed sea surface temperature (SST), such as the Atlantic multidecadal oscillation, and sea ice cover. Using Detection and Attribution Model Intercomparison Project (DAMIP) experiments, we find that the warming in the early 20th century and the recent 50 years is mainly driven by natural forcings and greenhouse gases (GHGs), whereas the cooling during 1941–1970 is caused by natural factors and anthropogenic aerosols. The cooling effects of anthropogenic aerosols are mainly from the indirect SST-mediated responses through the atmosphere-ocean interactions in the coupled model.
 
关键字
surface air temperature,attribution; coupled model,uncoupled model,anthropogenic aerosols
报告人
左铃
中国科学院大气物理研究所

稿件作者
李立娟 中科院大气物理研究所
左铃 中国科学院大气物理研究所
王斌 中国科学院大气物理研究所
冯涛 云南大学
常有礼 云南大学
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