A regime shift in the interhemispheric teleconnection between the Yellow and East China Seas and the southeastern tropical Pacific during the boreal summer SCIE SCOPUS

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Title
A regime shift in the interhemispheric teleconnection between the Yellow and East China Seas and the southeastern tropical Pacific during the boreal summer
Author(s)
Kim, Yong Sun; Kwon, Min Ho; Chung, Eui-Seok; Yeh, Sang-Wook; Jeong, Jin Yong; Jang, Chan Joo
KIOST Author(s)
Kim, Yong Sun(김용선)Kwon, Min Ho(권민호)Jeong, Jin Yong(정진용)Jang, Chan Joo(장찬주)
Alternative Author(s)
김용선; 권민호; 정진용; 장찬주
Publication Year
2023-06
Abstract
A drastic regime shift is observed in the early summer connection between the Yellow and East China Seas (YECS) and the tropical Pacific in the early 2000s through statistical estimations on reconstructed datasets for the period 1982-2020. During the pre-2003 period, prior to the regime shift, the summer sea surface temperatures (SSTs) in the YECS were modulated by local oceanic and atmospheric processes, along with their marginal coupling to the tropical Pacific. In contrast, an interhemispheric coupling emerges between the YECS and southeastern tropical Pacific after the regime shift. This teleconnection is attributed to a reduced El Nino signature in the tropical Pacific, which favors the emergence of the South Pacific meridional mode (SPMM) independently from the El Nino-Southern Oscillation signals. The SPMM-related SST anomalies invoke changes in rainfall and vertical motion over the western tropical Pacific, activating the western North Pacific subtropical high over the Philippine Sea. This atmospheric circulation system acts as an atmospheric bridge to mediate the air-sea interacted variability associated with the SPMM into the YECS. The susceptibility of the YECS to atmospheric forcing highlights the role of SST in the YECS as a potential indicator of global-scale climate change.
ISSN
0930-7575
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43315
DOI
10.1007/s00382-022-06529-1
Bibliographic Citation
Climate Dynamics, v.60, no.11-12, pp.3661 - 3680, 2023
Publisher
Springer Verlag
Keywords
South Pacific Meridional Mode; El Nino-Southern Oscillation; East Asian Summer Monsoon; Western North Pacific subtropical high; La Nina-like mean state
Type
Article
Language
English
Document Type
Article; Early Access
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