| DOI: | 10.5194/tc-9-305-2015
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| Scopus记录号: | 2-s2.0-84922892584
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| 论文题名: | A 1-D modelling study of Arctic sea-ice salinity |
| 作者: | Griewank P; J; , Notz D
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2015
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| 卷: | 9, 期:1 | | 起始页码: | 305
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| 结束页码: | 329
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| 语种: | 英语
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| 英文关键词: | annual variation
; growing season
; hydraulics
; ice core
; ice thickness
; one-dimensional modeling
; parameterization
; salinity
; sea ice
; Arctic Ocean
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| 英文摘要: | We use a 1-D model to study how salinity evolves in Arctic sea ice. To do so, we first explore how sea-ice surface melt and flooding can be incorporated into the 1-D thermodynamic Semi-Adaptive Multi-phase Sea-Ice Model (SAMSIM) presented by Griewank and Notz (2013). We introduce flooding and a flushing parametrization which treats sea ice as a hydraulic network of horizontal and vertical fluxes. Forcing SAMSIM with 36 years of ERA-interim atmospheric reanalysis data, we obtain a modelled Arctic sea-ice salinity that agrees well with ice-core measurements. The simulations thus allow us to identify the main drivers of the observed mean salinity profile in Arctic sea ice. Our results show a 1.5-4 g kgg'1 decrease of bulk salinity via gravity drainage after ice growth has ceased and before flushing sets in, which hinders approximating bulk salinity from ice thickness beyond the first growth season. In our simulations, salinity interannual variability of first-year ice is mostly restricted to the top 20 cm. We find that ice thickness, thermal resistivity, freshwater column, and stored energy change by less than 5% on average when the full salinity parametrization is replaced with a prescribed salinity profile. © Author(s) 2015. CC Attribution 3.0 License. |
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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/75342
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| Appears in Collections: | 影响、适应和脆弱性
气候变化与战略
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作者单位: | Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, Germany
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| Recommended Citation: | |
Griewank P,J,, Notz D. A 1-D modelling study of Arctic sea-ice salinity[J]. Cryosphere,2015-01-01,9(1)
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