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Simulated Relationship between Wintertime ENSO and East Asian Summer Rainfall: From CMIP3 to CMIP6
Advances in Atmospheric Sciences ( IF 5.8 ) Pub Date : 2020-10-30 , DOI: 10.1007/s00376-020-0147-y
Yuanhai Fu , Zhongda Lin , Tao Wang

El Niño-Southern Oscillation (ENSO) events have a strong influence on East Asian summer rainfall (EASR). This paper investigates the simulated ENSO-EASR relationship in CMIP6 models and compares the results with those in CMIP3 and CMIP5 models. In general, the CMIP6 models show almost no appreciable progress in representing the ENSO-EASR relationship compared with the CMIP5 models. The correlation coefficients in the CMIP6 models are relatively smaller and exhibit a slightly greater intermodel diversity than those in the CMIP5 models. Three physical processes related to the delayed effect of ENSO on EASR are further analyzed. Results show that, firstly, the relationships between ENSO and the tropical Indian Ocean (TIO) sea surface temperature (SST) in the CMIP6 models are more realistic, stronger, and have less intermodel diversity than those in the CMIP3 and CMIP5 models. Secondly, the teleconnections between the TIO SST and Philippine Sea convection (PSC) in the CMIP6 models are almost the same as those in the CMIP5 models, and stronger than those in the CMIP3 models. Finally, the CMIP3, CMIP5, and CMIP6 models exhibit essentially identical capabilities in representing the PSC-EASR relationship. Almost all the three generations of models underestimate the ENSO-EASR, TIO SST-PSC, and PSC-EASR relationships. Moreover, almost all the CMIP6 models that successfully capture the significant TIO SST-PSC relationship realistically simulate the ENSO-EASR relationship and vice versa, which is, however, not the case in the CMIP5 models.

中文翻译:

冬季ENSO与东亚夏季降雨量的模拟关系:从CMIP3到CMIP6

厄尔尼诺-南方涛动 (ENSO) 事件对东亚夏季降雨 (EASR) 有很大影响。本文研究了 CMIP6 模型中模拟的 ENSO-EASR 关系,并将结果与​​ CMIP3 和 CMIP5 模型中的结果进行了比较。总的来说,与 CMIP5 模型相比,CMIP6 模型在表示 ENSO-EASR 关系方面几乎没有明显的进步。CMIP6 模型中的相关系数相对较小,并且比 CMIP5 模型中的模型间多样性略大。进一步分析了与 ENSO 对 EASR 的延迟效应相关的三个物理过程。结果表明,首先,在 CMIP6 模型中,ENSO 与热带印度洋 (TIO) 海面温度 (SST) 之间的关系更真实、更强、并且比 CMIP3 和 CMIP5 模型中的模型间多样性更小。其次,CMIP6 模型中 TIO SST 和菲律宾海对流(PSC)之间的遥相关性与 CMIP5 模型中的几乎相同,并且强于 CMIP3 模型中的遥相关。最后,CMIP3、CMIP5 和 CMIP6 模型在表示 PSC-EASR 关系方面表现出基本相同的能力。几乎所有的三代模型都低估了 ENSO-EASR、TIO SST-PSC 和 PSC-EASR 关系。此外,几乎所有成功捕获显着 TIO SST-PSC 关系的 CMIP6 模型都真实地模拟了 ENSO-EASR 关系,反之亦然,然而,CMIP5 模型并非如此。CMIP6 模型中 TIO SST 和菲律宾海对流 (PSC) 之间的遥相关性与 CMIP5 模型中的几乎相同,并且强于 CMIP3 模型中的遥相关。最后,CMIP3、CMIP5 和 CMIP6 模型在表示 PSC-EASR 关系方面表现出基本相同的能力。几乎所有的三代模型都低估了 ENSO-EASR、TIO SST-PSC 和 PSC-EASR 关系。此外,几乎所有成功捕获显着 TIO SST-PSC 关系的 CMIP6 模型都真实地模拟了 ENSO-EASR 关系,反之亦然,然而,CMIP5 模型并非如此。CMIP6 模型中 TIO SST 和菲律宾海对流 (PSC) 之间的遥相关性与 CMIP5 模型中的几乎相同,并且强于 CMIP3 模型中的遥相关。最后,CMIP3、CMIP5 和 CMIP6 模型在表示 PSC-EASR 关系方面表现出基本相同的能力。几乎所有的三代模型都低估了 ENSO-EASR、TIO SST-PSC 和 PSC-EASR 关系。此外,几乎所有成功捕获显着 TIO SST-PSC 关系的 CMIP6 模型都真实地模拟了 ENSO-EASR 关系,反之亦然,然而,CMIP5 模型并非如此。和 CMIP6 模型在表示 PSC-EASR 关系方面表现出基本相同的能力。几乎所有的三代模型都低估了 ENSO-EASR、TIO SST-PSC 和 PSC-EASR 关系。此外,几乎所有成功捕获显着 TIO SST-PSC 关系的 CMIP6 模型都真实地模拟了 ENSO-EASR 关系,反之亦然,然而,CMIP5 模型并非如此。和 CMIP6 模型在表示 PSC-EASR 关系方面表现出基本相同的能力。几乎所有的三代模型都低估了 ENSO-EASR、TIO SST-PSC 和 PSC-EASR 关系。此外,几乎所有成功捕获显着 TIO SST-PSC 关系的 CMIP6 模型都真实地模拟了 ENSO-EASR 关系,反之亦然,然而,CMIP5 模型并非如此。
更新日期:2020-10-30
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