DOI: 10.1175/JCLI-D-13-00641.1
Scopus记录号: 2-s2.0-84905189954
论文题名: Long-term variations of the Kuroshio Extension path in winter: Meridional movement and path state change
作者: Seo Y. ; Sugimoto S. ; Hanawa K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 15 起始页码: 5929
结束页码: 5940
语种: 英语
Scopus关键词: Convolution
; Rivers
; Anticyclonic eddies
; Atmosphere-ocean interactions
; Boundary currents
; Decadal variability
; Eastern north pacific
; High spatial resolution
; North Pacific Ocean
; Sea Surface Temperature gradients
; Ocean currents
; air-sea interaction
; anticyclone
; boundary current
; decadal variation
; eddy
; sea surface temperature
; spatial resolution
; temperature gradient
; thermocline
; wind stress
; Kuroshio Extension
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: As an indicator of the Kuroshio Extension (KE) path, the KE northern boundary (KENB) was detected based on the position of the strong winter sea surface temperature (SST) gradient between 142° and 155°E, using high spatial resolution satellite-derived SST for the 30 winters (January to March) from 1982 to 2011. The KE path showed meridional movement with a period of 10-15 yr and an amplitude of about 2° latitude. The changes in latitudinal position of the KE path were initiated by a north-south shift of the Aleutian low (AL). Negative wind stress curl anomalies around 35°N in the eastern North Pacific associated with a northward shift of the AL induced a deepening of the main thermocline depth, and then this deepening signal propagated westward, reaching the KE region after about 3 yr, where it caused the KE path to move northward. The path state of the KE (straight path/convoluted path) modulated on a time scale of 8-12 yr, but this was not significantly correlated with the meridional movement of the KE path. The anticyclonic eddies containing warm-salty water that detached northward from the convoluted KE exerted a strong influence on oceanic conditions in the Kuroshio-Oyashio Confluence (KOC) region. The changes in path state of the KE were related to the path of the Kuroshio south of Japan over the long term; a convoluted (straight) KE path was associated with the Kuroshio taking the offshore nonlarge (nearshore nonlarge or typical large) meander path. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51072
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
Recommended Citation:
Seo Y.,Sugimoto S.,Hanawa K.. Long-term variations of the Kuroshio Extension path in winter: Meridional movement and path state change[J]. Journal of Climate,2014-01-01,27(15)