globalchange  > 气候减缓与适应
DOI: 10.1175/JCLI-D-16-0779.1
Scopus记录号: 2-s2.0-85025578215
论文题名:
Decadal variability of upper-ocean heat content associated with meridional shifts of western boundary current extensions in the North Pacific
作者: Taguchi B.; Schneider N.; Nonaka M.; Sasaki H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期:16
起始页码: 6247
结束页码: 6264
语种: 英语
Scopus关键词: Atmospheric thermodynamics ; Enthalpy ; Oceanography ; Atmosphere-ocean interactions ; Boundary currents ; Decadal variability ; North Pacific Ocean ; Ocean dynamics ; Oceanic variabilities ; Ocean currents
英文摘要: Generation and propagation processes of upper-ocean heat content (OHC) in the North Pacific are investigated using oceanic subsurface observations and an eddy-resolving ocean general circulation model hindcast simulation. OHC anomalies are decomposed into physically distinct dynamical components (OHCρ) due to temperature anomalies that are associated with density anomalies and spiciness components (OHCχ) due to temperature anomalies that are density compensating with salinity. Analysis of the observational and model data consistently shows that both dynamical and spiciness components contribute to interannual-decadal OHC variability, with the former (latter) component dominating in the subtropical (subpolar) North Pacific. OHCρ variability represents heaving of thermocline, propagates westward, and intensifies along the Kuroshio Extension, consistent with jet-trapped Rossby waves, while OHCχ variability propagates eastward along the subarctic frontal zone, suggesting advection by mean eastward currents. OHCχ variability tightly corresponds in space to horizontal mean spiciness gradients. Meanwhile, area-averaged OHCχ anomalies in the western subarctic frontal zone closely correspond in time to meridional shifts of the subarctic frontal zone. Regression coefficient of the OHCχ time series on the frontal displacement anomalies quantitatively agree with the area-averaged mean spiciness gradient in the region, and suggest that OHCχ is generated via frontal variability in the subarctic frontal zone. © 2017 American Meteorological Society.
资助项目: MEXT, Ministry of Education, Culture, Sports, Science and Technology ; MEXT, Ministry of Education, Culture, Sports, Science and Technology ; MEXT, Ministry of Education, Culture, Sports, Science and Technology ; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48782
Appears in Collections:气候减缓与适应
气候变化与战略

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作者单位: Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan; International Pacific Research Center, University of Hawai'i at Manoa, Honolulu, HI, United States; Department of Oceanography, University of Hawai'i at Manoa, Honolulu, HI, United States; Application Laboratory, Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan

Recommended Citation:
Taguchi B.,Schneider N.,Nonaka M.,et al. Decadal variability of upper-ocean heat content associated with meridional shifts of western boundary current extensions in the North Pacific[J]. Journal of Climate,2017-01-01,30(16)
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