气候变化领域集成服务门户(CCPortal): Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice

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DOI	10.5194/tc-8-2219-2014
	Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice
	Arndt S.; Nicolaus M.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
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.
学科领域	cryosphere; data set; ice cover; sea ice; seasonal variation; shortwave radiation; solar power; transmittance; trend analysis; Arctic Ocean
语种	英语
scopus关键词	cryosphere; data set; ice cover; sea ice; seasonal variation; shortwave radiation; solar power; transmittance; trend analysis; Arctic Ocean
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120004
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Bussestraße 24, Bremerhaven, 27570, Germany
推荐引用方式 GB/T 7714	Arndt S.,Nicolaus M.. Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice[J],2014,8(6).
APA	Arndt S.,&Nicolaus M..(2014).Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice.Cryosphere,8(6).
MLA	Arndt S.,et al."Seasonal cycle and long-term trend of solar energy fluxes through Arctic sea ice".Cryosphere 8.6(2014).