文献类型：期刊文献

英文题名：Interannual Covariation of the North American and African Summer Monsoons

作者：Luo, Weijian[1];Weng, Jinwen[1];Luo, Jianzhou[1];Wang, Lei[1,2]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang, Peoples R China

年份：2024

外文期刊名：INTERNATIONAL JOURNAL OF CLIMATOLOGY

收录：SCI-EXPANDED(收录号：WOS:001332032900001)、、EI(收录号：20244317242219)、Scopus(收录号：2-s2.0-85206619328)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 41776031), the Innovative Team Plan for Department of Education of Guangdong Province (Grant No. 2023KCXTD015) and the program for scientific research start- up funds of Guangdong Ocean University (Grant No. R17051).

语种：英文

外文关键词：inter-monsoon relationship; monsoon precipitation; North African summer monsoon; North American summer monsoon; tropical Pacific-Atlantic SST anomalies

外文摘要：The North American summer monsoon (NASM) and the North African summer monsoon (NAFSM) are two vital subsystems of the global monsoon. To date, the potential inter-monsoon relationship between the NASM and NAFSM has not been fully understood. To fill this gap, we investigate the NASM-NAFSM relationship on the interannual timescale during the period of 1979-2022. Based on statistical methods (including correlation, empirical orthogonal function and cross wavelet analyses), we identify a noteworthy interannual covariation of the NASM and NAFSM. This observed NASM-NAFSM covariation can be explained by atmospheric circulation anomalies associated with sea surface temperature (SST) anomalies in the tropical central-eastern Pacific and tropical Atlantic, suggesting the critical roles of tropical Pacific-Atlantic SST anomalies in shaping the NASM-NAFSM covariation. The results of Coupled Model Intercomparison Project Phase 6 (CMIP6) models indicate that a model's ability to simulate the NASM-NAFSM covariation tends to be related to its ability to reproduce the modulating effects of the tropical Pacific-Atlantic SST anomalies. These results have potential implications for seasonal forecasts of the NASM and NAFSM variations, suggesting that the NASM and NAFSM can be considered simultaneously in climate predictions. This study identifies a noteworthy interannual covariation of the North American summer monsoon (NASM) and the North African summer monsoon (NAFSM). The NASM-NAFSM covariation can be explained by atmospheric circulation anomalies associated with trans-Atlantic-Pacific dipole-like sea surface temperature (SST) anomalies.image