| DOI: | 10.5194/tc-8-2219-2014
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| Scopus记录号: | 2-s2.0-84913587851
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| 论文题名: | Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice |
| 作者: | Arndt S; , Nicolaus M
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2014
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| 卷: | 8, 期:6 | | 起始页码: | 2219
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| 结束页码: | 2233
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| 语种: | 英语
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| 英文关键词: | cryosphere
; data set
; ice cover
; sea ice
; seasonal variation
; shortwave radiation
; solar power
; transmittance
; trend analysis
; Arctic Ocean
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| 英文摘要: | Arctic sea ice has not only decreased in volume during the last decades, but has also changed in its physical properties towards a thinner and more seasonal ice cover. These changes strongly impact the energy budget, and might affect the ice-associated ecosystems. In this study, we quantify solar shortwave fluxes through sea ice for the entire Arctic during all seasons. To focus on sea-ice-related processes, we exclude fluxes through open water, scaling linearly with sea ice concentration. We present a new parameterization of light transmittance through sea ice for all seasons as a function of variable sea ice properties. The maximum monthly mean solar heat flux under the ice of 30 × 105 Jm-2 occurs in June, enough heat to melt 0.3 m of sea ice. Furthermore, our results suggest that 96% of the annual solar heat input through sea ice occurs during only a 4-month period from May to August. Applying the new parameterization to remote sensing and reanalysis data from 1979 to 2011, we find an increase in transmitted light of 1.5% yr-1 for all regions. This corresponds to an increase in potential sea ice bottom melt of 63% over the 33-year study period. Sensitivity studies reveal that the results depend strongly on the timing of melt onset and the correct classification of ice types. Assuming 2 weeks earlier melt onset, the annual transmitted solar radiation to the upper ocean increases by 20%. Continuing the observed transition from a mixed multi-year/first-year sea ice cover to a seasonal ice cover results in an increase in light transmittance by an additional 18%. © Author(s) 2014. |
| 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/74758
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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: | Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Bussestraße 24, Bremerhaven, Germany
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| Recommended Citation: | |
Arndt S,, Nicolaus M. Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice[J]. Cryosphere,2014-01-01,8(6)
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