气候变化领域集成服务门户(CCPortal): An interdecadal change in the relationship between May North Atlantic oscillation and early summer precipitation over the Eastern Tibetan Plateau around the late 1990s

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DOI	10.1016/j.atmosres.2023.107178
	An interdecadal change in the relationship between May North Atlantic oscillation and early summer precipitation over the Eastern Tibetan Plateau around the late 1990s
	Yang, Cheng; Sun, Yang; Deng, Zhongren; Zhou, Shunwu; Danzeng, Lunzhu
发表日期	2024
ISSN	0169-8095
EISSN	1873-2895
卷号	299
英文摘要	Based on the observational and reanalysis datasets, a dipole pattern of the early summer (June) precipitation over the eastern Tibetan Plateau (TP) is identified through empirical orthogonal function. In contrast to previous researches, this paper introduces the May North Atlantic Oscillation (NAO) as a preceding signal and investigates its connection with subsequent early summer precipitation over the eastern TP during 1980-2019, focusing on predictive aspects. Results reveal that the correlation between NAO and primary eastern TP precipitation pattern (Precip_EOF1) has weakened since 2000. During 1980-2000, an equivalent barotropic Silk Road Pattern (SRP) observed across Eurasia triggers southerly wind anomalies over the TP. This, in turn, leads to the northward shift of the water vapor, which favors the ascending motion over the northern TP (NTP) due to water vapor convergence. Additionally, the SRP-related sensible heating also plays a critical role in vertical motion over the eastern TP by enhancing the TP thermal effect. Consequently, these factors contribute to shaping the dipole pattern of eastern TP precipitation. However, the weakened relationship between NAO and Precip_EOF1 during 2001-2019 is attributed to the absence of NAO-related atmospheric circulation over Eurasia. Further analysis suggests that these circulation anomalies arise from the interdecadal variability of the NAO and its phase shift. Moreover, when the influence of sea surface temperature anomalies over the northern North Atlantic is removed, the correlation of Precip_EOF1 with NAO and Atlantic Multidecadal Oscillation (AMO) both become insignifi-cant. This suggests that the NAO-related dipole pattern of eastern TP precipitation is modulated by preceding northern North Atlantic sea surface temperature rather than AMO on the interdecadal timescale.
关键词	Eastern Tibetan Plateau North Atlantic oscillation Preceding signal Silk road pattern Sea surface temperature
英文关键词	INTERANNUAL VARIATION; DIPOLE; IMPACT; CHINA; NAO; TELECONNECTION; FORMULATION; RAINFALL; WEATHER; PATTERN
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001140133400001
来源期刊	ATMOSPHERIC RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283865
作者单位	Nanjing University of Information Science & Technology; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Yang, Cheng,Sun, Yang,Deng, Zhongren,et al. An interdecadal change in the relationship between May North Atlantic oscillation and early summer precipitation over the Eastern Tibetan Plateau around the late 1990s[J],2024,299.
APA	Yang, Cheng,Sun, Yang,Deng, Zhongren,Zhou, Shunwu,&Danzeng, Lunzhu.(2024).An interdecadal change in the relationship between May North Atlantic oscillation and early summer precipitation over the Eastern Tibetan Plateau around the late 1990s.ATMOSPHERIC RESEARCH,299.
MLA	Yang, Cheng,et al."An interdecadal change in the relationship between May North Atlantic oscillation and early summer precipitation over the Eastern Tibetan Plateau around the late 1990s".ATMOSPHERIC RESEARCH 299(2024).