DOI: 10.1029/2017JC013718
Scopus记录号: 2-s2.0-85051204030
论文题名: Signatures of the 1976–1977 Regime Shift in the North Pacific Revealed by Statistical Analysis
作者: Giamalaki K. ; Beaulieu C. ; Faranda D. ; Henson S.A. ; Josey S.A. ; Martin A.P.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 6 起始页码: 4388
结束页码: 4397
语种: 英语
英文关键词: Aleutian Low
; change-point detection
; dynamical proxies
; Kuroshio Extension
; regime shifts
英文摘要: Regime shifts are abrupt changes in an ecosystem that may propagate through multiple trophic levels and have pronounced effects on the biotic and abiotic environment, potentially resulting in ecosystem reorganization. There are multiple mechanisms that could cause such abrupt events including natural and anthropogenic factors. In the North Pacific, a major shift in the physics of the system, including a sudden increase in sea surface temperature, was reported in 1977 with a prominent biological response in the lower trophic levels and subsequent effects on the fisheries and economy of the region. Here we investigate the statistics of physical processes that could have triggered and maintained the late 1970s shift. The hypothesis of an extreme sea level pressure event abruptly changing the oceanic conditions in winter 1976–1977, which was maintained by long-term changes in air-sea interaction processes, is tested. Using dynamical proxies, we show the occurrence of an extreme atmospheric event, specifically a persistent Aleutian Low during winter 1976–1977, which constitutes a substantial part of the triggering mechanism of the regime shift. Subsequent sudden changes in the net heat flux occurred in the western North Pacific, particularly in the Kuroshio Extension region, which contributed to the maintenance of the new regime. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113776
Appears in Collections: 气候减缓与适应
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作者单位: Ocean and Earth Science, University of Southampton, European Way, Southampton, United Kingdom; Ocean Sciences Department, University of California, Santa Cruz, CA, United States; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; National Oceanography Centre, European Way, Southampton, United Kingdom
Recommended Citation:
Giamalaki K.,Beaulieu C.,Faranda D.,et al. Signatures of the 1976–1977 Regime Shift in the North Pacific Revealed by Statistical Analysis[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(6)