Meridional Displacement of the East Asian Upper-tropospheric Westerly Jet and Its Relationship with the East Asian Summer Rainfall in CMIP5 Simulations
Meridional Displacement of the East Asian Upper-tropospheric Westerly Jet and Its Relationship with the East Asian Summer Rainfall in CMIP5 Simulations
复制标题
CMIP5模拟中东亚对流层上层西风急流的经向位移及其与东亚夏季降水的关系
DOI：
10.1007/s00376-019-9066-1
复制
发表时间：
2019-11
影响因子：
5.8
通讯作者：
Lu Riyu
中科院分区：
文献类型：
--
作者：
Yan Yuhan;Li Chaofan;Lu Riyu
东亚西风急流（EAJ）作为对流层上层环流的第一主导模态，其纬向位移与东亚夏季降水的变化密切相关。利用CMIP 5（耦合模式相互比较项目第5阶段）的历史模拟资料，分析了东亚-日本纬向位移的年际变化及其与东亚夏季降水的关系。模型基本上能再现EAJ的纬向位移，在大多数模拟中主要表现为第一主模态。对于EAJ的纬向位移和东亚降水之间的关系，几乎所有的模型都描绘了一个较弱的相关性比观测，并表现出相当大的传播模型。结果表明，这种年际关系的差异与气候平均状态的模拟密切相关，包括欧亚西风急流的气候位置以及南亚和西北太平洋降水的偏差。此外，还发现模拟差异与东亚急流变率强度之间存在密切关系：东亚急流纬向位移强度越大的模式，模拟的年际关系越密切，反之亦然。
As the first leading mode of upper-tropospheric circulation in observations, the meridional displacement of the East Asian westerly jet (EAJ) varies closely with the East Asian rainfall in summer. In this study, the interannual variation of the EAJ meridional displacement and its relationship with the East Asian summer rainfall are evaluated, using the historical simulations of CMIP5 (phase 5 of the Coupled Model Intercomparison Project). The models can generally reproduce the meridional displacement of the EAJ, which is mainly manifested as the first principal mode in most of the simulations. For the relationship between the meridional displacement of the EAJ and East Asian rainfall, almost all the models depict a weaker correlation than observations and exhibit considerably large spread across the models. It is found that the discrepancy in the interannual relationship is closely related to the simulation of the climate mean state, including the climatological location of the westerly jet in Eurasia and rainfall bias in South Asia and the western North Pacific. In addition, a close relationship between the simulation discrepancy and intensity of EAJ variability is also found: the models with a stronger intensity of the EAJ meridional displacement tend to reproduce a closer interannual relationship, and vice versa.
登录
查看更多内容
不同水平分辨率BCC_CSM模式模拟中国近半个世纪夏季降水的评价
影响因子：
4.4
作者：
Zhao, Yong;Zhou, Yang;Yang, Ben;Wu, Haomin
通讯作者：
Wu, Haomin
IAP AGCM4.0模拟东亚副热带西风急流与东亚夏季降水的关系
影响因子：
2.3
作者：
Yan Zhengbin;Lin Zhaohui;Zhang He
通讯作者：
Zhang He
影响因子：
5.8
作者：
Jinhai He;Mingsheng Wen;Lijuan Wang;Haiming Xu
通讯作者：
Jinhai He;Mingsheng Wen;Lijuan Wang;Haiming Xu
CMIP5模式中夏季东亚西风急流核心气候位置位置的模式间多样性及其与东亚降水的关系
影响因子：
5.8
作者：
Lin Zhongda;Fu Yuanhai;Lu Riyu
通讯作者：
Lu Riyu
CMIP5 耦合模型中东亚夏季风的气候学和年际变化：海气耦合是否改善了模拟？
影响因子：
4.9
作者：
Song, Fengfei;Zhou, Tianjun
通讯作者：
Zhou, Tianjun