DOI: 10.1175/JCLI-D-12-00051.1
Scopus记录号: 2-s2.0-84870049954
论文题名: Effects of the 18.6-yr modulation of tidal mixing on the north pacific bidecadal climate variability in a coupled climate model
作者: Tanaka Y. ; Yasuda I. ; Hasumi H. ; Tatebe H. ; Osafune S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 21 起始页码: 7625
结束页码: 7642
语种: 英语
Scopus关键词: Air sea interactions
; Climate predictability
; Climate variability
; Coupled climate model
; Decadal variability
; Diapycnal diffusivity
; Diapycnal mixing
; Global climates
; Global ocean circulation
; Global tides
; Midlatitudes
; North Pacific
; North Pacific Ocean
; Orbital inclination
; Pacific decadal oscillation
; Physical mechanism
; Sea level pressure
; Sea surface temperature anomalies
; SST anomalies
; Tidal mixing
; Atmospheric temperature
; Climate change
; Modulation
; Ocean currents
; Sea level
; Mixing
; climate modeling
; climate oscillation
; climate variation
; decadal variation
; diffusivity
; global climate
; global ocean
; oceanic circulation
; sea surface temperature
; spatial distribution
; temperature anomaly
; Kuril Strait
; Pacific Ocean
; Pacific Ocean (North)
; Russian Federation
英文摘要: Diapycnal mixing induced by tide-topography interaction, one of the essential factors maintaining the global ocean circulation and hence the global climate, is modulated by the 18.6-yr period oscillation of the lunar orbital inclination, and has therefore been hypothesized to influence bidecadal climate variability. In thisstudy, the spatial distribution of diapycnal diffusivity together with its 18.6-yr oscillation estimated from a global tide model is incorporated into a state-of-the-art numerical coupled climatemodel to investigate its effects on climate variability over the North Pacific and to understand the underlying physical mechanism. It is shown that a significant sea surface temperature (SST) anomaly with a period of 18.6 years appears in the Kuroshio-Oyashio Extension region; a positive (negative)SST anomaly tends to occur during strong (weak) tidal mixing. This is first induced by anomalous horizontal circulation localized around the Kuril Straits, where enhanced modulation of tidal mixing exists, and then amplified through a positive feedback due to midlatitude air-sea interactions. The resulting SST and sea level pressure variability patterns are reminiscent of those associated with one of the most prominent modes of climate variability in the North Pacific known as the Pacific decadal oscillation, suggesting the potential for improving climate predictability by taking into account the 18.6-yr modulation of tidal mixing. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52140
Appears in Collections: 气候变化事实与影响
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作者单位: Atmosphere and Ocean Research Institute, Kashiwa, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Atmosphere and Ocean Research Institute, Kashiwa, Japan; Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Tokyo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Recommended Citation:
Tanaka Y.,Yasuda I.,Hasumi H.,et al. Effects of the 18.6-yr modulation of tidal mixing on the north pacific bidecadal climate variability in a coupled climate model[J]. Journal of Climate,2012-01-01,25(21)