DOI: 10.1175/JCLI-D-15-0206.1
Scopus记录号: 2-s2.0-84957836925
论文题名: Decadal variation in winter mixed layer depth south of the Kuroshio Extension and its influence on winter mixed layer temperature
作者: Sugimoto S. ; Kako S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 3 起始页码: 1237
结束页码: 1252
语种: 英语
Scopus关键词: Atmospheric temperature
; Mechanical waves
; Decadal variability
; Geographic location
; Mixed layer
; North Pacific Ocean
; Surface temperatures
; Variability
; Ocean currents
; decadal variation
; depth
; mixed layer
; oceanic current
; surface temperature
; temperature profile
; winter
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The long-term behavior of the wintertime mixed layer depth (MLD) and mixed layer temperature (MLT) are investigated in a region south of the Kuroshio Extension (KE) (30°-37°N, 141°-155°E), an area of the North Pacific subtropical gyre where the deepestMLD occurs, using historical temperature profiles of 1968-2014. Both theMLD andMLT in March have low-frequency variations, which show significant decadal (~10 yr) variations after the late 1980s. Observational data and simulation outputs from a one-dimensional turbulent closure model reveal that surface cooling is the main control on winter MLD in the late 1970s and 1980s, whereas there is a change in the strength of subsurface stratification is the main control after~1990. In the latter period, a weak (strong) subsurface stratification is caused by a straight path (convoluted path) of the KE and by a deepening (shallowing) of the main thermocline depth due to oceanic Rossby waves formed as a result of positive (negative) anomalies of wind stress curl associated with a southward (northward) movement of the Aleutian low in the central North Pacific. During deeper (shallower) periods of winter MLD, the strong (weak) vertical entrainment process, resulting from a rapid (slow) deepening of the mixed layer (ML) in January and February, forms a negative (positive) anomaly of temperature tendency. Consequently, the decadal variations in wintertime MLT are formed. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50270
Appears in Collections: 气候变化事实与影响
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作者单位: Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Japan; Graduate School of Science and Engineering, Department of Ocean Civil Engineering, Kagoshima University, Kagoshima, Japan
Recommended Citation:
Sugimoto S.,Kako S.. Decadal variation in winter mixed layer depth south of the Kuroshio Extension and its influence on winter mixed layer temperature[J]. Journal of Climate,2016-01-01,29(3)