| DOI: | 10.1002/grl.50260
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| 论文题名: | Dense bottom layers in the Scotia Sea, Southern Ocean: Creation, lifespan, and destruction |
| 作者: | Meredith M.P.; Brown P.J.; Naveira Garabato A.C.; Jullion L.; Venables H.J.; Messias M.-J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9253
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| EISSN: | 1944-8984
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| 出版年: | 2013
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| 卷: | 40, 期:5 | | 起始页码: | 933
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| 结束页码: | 936
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| 语种: | 英语
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| 英文关键词: | Abyssal mixing
; Dense bottom layers
; Overflows
; Southern Ocean
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| Scopus关键词: | Abyssal mixing
; Bottom layers
; Overflows
; Overturning circulation
; Southern ocean
; Spatially inhomogeneous
; Vertical diffusivity
; Vertical mixing
; Mixing
; Stream flow
; Oceanography
; dense water
; diffusivity
; episodic event
; estimation method
; stratification
; vertical mixing
; Atlantic Ocean
; Scotia Sea
; Southern Ocean
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| 英文摘要: | The lower limb of the Atlantic overturning circulation is renewed by dense waters from the Southern Ocean, a substantial portion of which flow through the Scotia Sea. We report dense bottom layers here, with gradients in temperature and salinity comparable to those seen near the surface of the Southern Ocean. These are overlain by layers with much weaker stratification, and are caused by episodic overflows of dense waters across the South Scotia Ridge, and topographic trapping within deep trenches. One such layer was found to be at least 3-4 years older than the water immediately above. The estimated vertical diffusivity to which this layer was subject is substantially less than the strong basin-average deep mixing reported previously. We conjecture that (a) vertical mixing in the Scotia Sea is strongly spatially inhomogeneous, and (b) the flushing of these layers, like their formation, is related to overflow events, and hence also strongly episodic. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876798410&doi=10.1002%2fgrl.50260&partnerID=40&md5=dbf88a4767b6c2cec4127bb41e681aad
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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/6517
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| Appears in Collections: | 气候减缓与适应
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作者单位: | British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom
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| Recommended Citation: | |
Meredith M.P.,Brown P.J.,Naveira Garabato A.C.,et al. Dense bottom layers in the Scotia Sea, Southern Ocean: Creation, lifespan, and destruction[J]. Geophysical Research Letters,2013-01-01,40(5).
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