Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0779.1 |
Decadal Variability of Upper-Ocean Heat Content Associated with Meridional Shifts of Western Boundary Current Extensions in the North Pacific | |
Taguchi, Bunmei1,2; Schneider, Niklas3,4; Nonaka, Masami5; Sasaki, Hideharu5 | |
2017-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA |
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 (OHC rho) due to temperature anomalies that are associated with density anomalies and spiciness components (OHC chi) 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. OHC rho variability represents heaving of thermocline, propagates westward, and intensifies along the Kuroshio Extension, consistent with jet-trapped Rossby waves, while OHC chi variability propagates eastward along the subarctic frontal zone, suggesting advection by mean eastward currents. OHC chi variability tightly corresponds in space to horizontal mean spiciness gradients. Meanwhile, area-averaged OHC chi anomalies in the western subarctic frontal zone closely correspond in time to meridional shifts of the subarctic frontal zone. Regression coefficient of the OHC chi time series on the frontal displacement anomalies quantitatively agree with the area-averaged mean spiciness gradient in the region, and suggest that OHC chi is generated via frontal variability in the subarctic frontal zone. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406040200011 |
WOS关键词 | KUROSHIO-OYASHIO EXTENSION ; SEA-SURFACE TEMPERATURE ; EDDY-RESOLVING OGCM ; SST ANOMALIES ; LEVEL CHANGES ; SYSTEM MODEL ; SCALE ; OSCILLATIONS ; CIRCULATION ; SIMULATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19420 |
专题 | 气候变化 |
作者单位 | 1.Univ Tokyo, Res Ctr Adv Sci & Technol, Tokyo, Japan; 2.Japan Agcy Marine Earth Sci & Technol, Yokohama, Kanagawa, Japan; 3.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 4.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA; 5.Japan Agcy Marine Earth Sci & Technol, Applicat Lab, Yokohama, Kanagawa, Japan |
推荐引用方式 GB/T 7714 | Taguchi, Bunmei,Schneider, Niklas,Nonaka, Masami,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,2017,30(16). |
APA | Taguchi, Bunmei,Schneider, Niklas,Nonaka, Masami,&Sasaki, Hideharu.(2017).Decadal Variability of Upper-Ocean Heat Content Associated with Meridional Shifts of Western Boundary Current Extensions in the North Pacific.JOURNAL OF CLIMATE,30(16). |
MLA | Taguchi, Bunmei,et al."Decadal Variability of Upper-Ocean Heat Content Associated with Meridional Shifts of Western Boundary Current Extensions in the North Pacific".JOURNAL OF CLIMATE 30.16(2017). |
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