DOI: 10.1175/JCLI-D-14-00172.1
Scopus记录号: 2-s2.0-84921656304
论文题名: Causes of the multidecadal-scale warming of the intermediate water in the Okhotsk Sea and western subarctic North Pacific
作者: Nakanowatari T. ; Nakamura T. ; Uchimoto K. ; Uehara H. ; Mitsudera H. ; Ohshima K.I. ; Hasumi H. ; Wakatsuchi M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 2 起始页码: 714
结束页码: 736
语种: 英语
Scopus关键词: Budget control
; Oceanography
; Sea ice
; Atmospheric conditions
; Atmospheric forcing
; Heat and freshwater fluxes
; Heat budget analysis
; Ice-ocean coupled model
; Intermediate waters
; Ocean circulation
; Okhotsk sea intermediate waters
; Surface waters
; annual variation
; heat budget
; ice-ocean interaction
; intermediate water
; sea ice
; thermohaline circulation
; warming
; wind stress
; Pacific Ocean
; Pacific Ocean (North)
; Sea of Okhotsk
英文摘要: Causes of the multidecadal-scale warming of the intermediate water in the Okhotsk Sea and the western subarctic North Pacific during 1980-2008 are investigated using an ice-ocean coupled model with interannually varying atmospheric forcing. A hindcast experiment qualitatively reproduces the warming and decadal fluctuations of the intermediate water that are similar to those of observations: the warming is significant along the western part of the Okhotsk Sea and subarctic frontal region. The effects of the thermohaline- and wind-driven ocean circulation on the warming are evaluated from perturbation experiments on thermohaline (turbulent heat and freshwater fluxes) and wind causes, respectively. The thermohaline causes are shown to contribute positively to warming in the Okhotsk Sea Intermediate Water (OSIW). The heat budget analysis for the OSIW indicates that the warming is related to a decrease in cold and dense shelf water (DSW) flux, which is caused by a decrease in sea ice and surface water freshening. In contrast, the wind cause has a cooling effect in the OSIW through an increase in DSW. In the subarctic frontal region, the warming is mainly caused by the wind stress change. The heat budget analysis indicates that the warming is related to an increase in the northward advection of the subtropical warm water. These results imply that both thermohaline- and winddriven ocean circulation changes are essential components of the warming in the intermediate water. The atmospheric conditions responsible for the warming are related to a weakened Aleutian low and Siberian high in early and late winter. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50682
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Research Institute of Innovative Technology for the Earth, Kyoto, Japan; Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan
Recommended Citation:
Nakanowatari T.,Nakamura T.,Uchimoto K.,et al. Causes of the multidecadal-scale warming of the intermediate water in the Okhotsk Sea and western subarctic North Pacific[J]. Journal of Climate,2015-01-01,28(2)