DOI: 10.1002/2014GL059934
论文题名: Long-term trend of Pacific South Equatorial Current bifurcation over 1950-2010
作者: Zhai F. ; Hu D. ; Wang Q. ; Wang F.
刊名: Geophysical Research Letters
ISSN: 0094-10077
EISSN: 1944-9808
出版年: 2014
卷: 41, 期: 9 起始页码: 3172
结束页码: 3180
语种: 英语
英文关键词: long-term trend
; South Equatorial Current
Scopus关键词: Earth sciences
; Geophysics
; Circulation changes
; Equatorial undercurrents
; Long-term changes
; Long-term trend
; North Equatorial Current
; Reduced-gravity model
; Simple ocean data assimilations
; South equatorial currents
; Bifurcation (mathematics)
; Ekman transport
; gravity field
; long-term change
; surface wind
; wind forcing
; wind-driven current
; Coral Sea
; Pacific Ocean
; Pacific Ocean (Northwest)
; Pacific Ocean (Southeast)
; Pacific Ocean (Tropical)
; South Equatorial Current
; Anthozoa
英文摘要: This study investigates the long-term change of the Pacific South Equatorial Current (SEC) bifurcation latitude (SBL) over 1950-2010 with Simple Ocean Data Assimilation version 2.2.4. Results indicate that the SBL averaged within upper 200m has migrated southward at 0.020°Syr-1, comparable in magnitude with -0.024°Nyr-1 for the North Equatorial Current bifurcation latitude (NBL). The SEC transport into the Coral Sea has increased. Due to the southward SBL migration, most of the increased SEC water was transported equatorward, contributing to the Equatorial Undercurrent intensification. Experiments with a nonlinear 1.5 layer reduced gravity model indicate that the southward migration of SBL is mainly caused by positive Ekman flux divergence trend in the eastern tropical South Pacific, while that of NBL is caused by negative Ekman flux divergence trend in the western tropical North Pacific. Key Points SBL and NBL show consistent long-term trends over 1950-2010 Long-term trends of SBL and NBL are related to different circulation changes The circulation changes are due to different surface wind forcing anomalies © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901914122&doi=10.1002%2f2014GL059934&partnerID=40&md5=7ec1e91f0b6b3b8ee326693afdc9f93a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7341
Appears in Collections: 气候减缓与适应
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作者单位: Third Institute of Oceanography State Oceanic Administration, Xiamen, China
Recommended Citation:
Zhai F.,Hu D.,Wang Q.,et al. Long-term trend of Pacific South Equatorial Current bifurcation over 1950-2010[J]. Geophysical Research Letters,2014-01-01,41(9).