| DOI: | 10.1002/2015GL063827
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| 论文题名: | Eddy stirring and horizontal diffusivity from Argo float observations: Geographic and depth variability |
| 作者: | Cole S.T.; Wortham C.; Kunze E.; Owens W.B.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9208
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| EISSN: | 1944-8939
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| 出版年: | 2015
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| 卷: | 42, 期:10 | | 起始页码: | 3989
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| 结束页码: | 3997
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| 语种: | 英语
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| 英文关键词: | Argo
; diffusivity
; eddy stirring
; mixing length
; spice
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| Scopus关键词: | Boundary layers
; Mixing
; Ocean currents
; SPICE
; Statistical tests
; Antarctic Circumpolar Currents
; Argo
; Density surfaces
; Eddy stirring
; Mixing length
; Orders of magnitude
; Velocity fluctuations
; Western boundary currents
; Diffusion
; Antarctic Circumpolar Wave
; Argo
; diffusivity
; eddy covariance
; equatorial dynamics
; isopycnal layer
; mixing
; sea surface salinity
; tracer
; western boundary current
; zonal flow
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| 英文摘要: | Stirring along isopycnals is a significant factor in determining the distribution of tracers within the ocean. Salinity anomalies on density surfaces from Argo float profiles are used to investigate horizontal stirring and estimate eddy mixing lengths. Eddy mixing length and velocity fluctuations from the ECCO2 global state estimate are used to estimate horizontal diffusivity at a 300 km scale in the upper 2000 m with near-global coverage. Diffusivity varies by over two orders of magnitude with latitude, longitude, and depth. In all basins, diffusivity is elevated in zonal bands corresponding to strong current regions, including western boundary current extension regions, the Antarctic Circumpolar Current, and equatorial current systems. The estimated mixing lengths and diffusivities provide an observationally based data set that can be used to test and constrain predictions and parameterizations of eddy stirring. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931562101&doi=10.1002%2f2015GL063827&partnerID=40&md5=2d6366b3c809d0c89cc5af8137e4fe63
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8824
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Woods Hole Oceanographic Institution, Woods Hole, MA, United States
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| Recommended Citation: | |
Cole S.T.,Wortham C.,Kunze E.,et al. Eddy stirring and horizontal diffusivity from Argo float observations: Geographic and depth variability[J]. Geophysical Research Letters,2015-01-01,42(10).
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