| DOI: | 10.1002/2014GL062180
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| 论文题名: | Axisymmetric circulation driven by marginal heating in ice-covered lakes |
| 作者: | Kirillin G.B.; Forrest A.L.; Graves K.E.; Fischer A.; Engelhardt C.; Laval B.E.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8755
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| EISSN: | 1944-8486
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| 出版年: | 2015
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| 卷: | 42, 期:8 | | 起始页码: | 2893
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| 结束页码: | 2900
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| 语种: | 英语
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| 英文关键词: | buoyancy flux
; density underflows
; ice-covered lakes
; rotating gravity currents
; sloping topography
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| Scopus关键词: | Buoyancy
; Gravitation
; Gravity waves
; Heat flux
; Ice
; Anti-cyclonic gyre
; Basin-scale circulation
; Buoyancy fluxes
; Continental shelves
; Gravity currents
; Ice-covered
; Temperature of maximum densities
; Underflows
; Lakes
; buoyancy
; continental shelf
; gravity wave
; gyre
; ice cover
; lake ecosystem
; water column
; Finland
; Lake Kilpisjarvi
; Lappi [Finland]
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| 英文摘要: | Below the temperature of maximum density (TMD) in freshwater lakes, heating at the lateral margins produces gravity currents along the bottom slope, akin to katabatic winds in the atmosphere and currents on continental shelves. We describe axisymmetric basin-scale circulation driven by heat flux at the shorelines in polar Lake Kilpisjärvi. A dense underflow originating near the shore converges toward the lake center, where it produces warm upwelling and return flow across the bulk of lake water column. The return flow, being subject to Coriolis force, creates a lake-wide anticyclonic gyre with velocities of 2-4 cm s-1. While warm underflows are common on ice-covered lakes, the key finding is the basin-scale anticyclonic gyre with warm upwelling in the core. This circulation mechanism provides a key to understanding transport processes in (semi) enclosed basins subject to negative buoyancy flux due to heating (or cooling at temperatures above TMD) at their lateral boundaries. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929501663&doi=10.1002%2f2014GL062180&partnerID=40&md5=f36c356d1448b14b614ec16d6c1129b1
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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/8371
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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: | Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
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| Recommended Citation: | |
Kirillin G.B.,Forrest A.L.,Graves K.E.,et al. Axisymmetric circulation driven by marginal heating in ice-covered lakes[J]. Geophysical Research Letters,2015-01-01,42(8).
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