气候变化领域集成服务门户(CCPortal): Variability of light transmission through Arctic land-fast sea ice during spring

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DOI	10.5194/tc-7-977-2013
	Variability of light transmission through Arctic land-fast sea ice during spring
	Nicolaus M.; Petrich C.; Hudson S.R.; Granskog M.A.
发表日期	2013
ISSN	19940416
卷号	7 期号:3
英文摘要	The amount of solar radiation transmitted through Arctic sea ice is determined by the thickness and physical properties of snow and sea ice. Light transmittance is highly variable in space and time since thickness and physical properties of snow and sea ice are highly heterogeneous on variable time and length scales. We present field measurements of under-ice irradiance along transects under undeformed land-fast sea ice at Barrow, Alaska (March, May, and June 2010). The measurements were performed with a spectral radiometer mounted on a floating under-ice sled. The objective was to quantify the spatial variability of light transmittance through snow and sea ice, and to compare this variability along its seasonal evolution. Along with optical measurements, snow depth, sea ice thickness, and freeboard were recorded, and ice cores were analyzed for chlorophyll and particulate matter. Our results show that snow cover variability prior to onset of snow melt causes as much relative spatial variability of light transmittance as the contrast of ponded and white ice during summer. Both before and after melt onset, measured transmittances fell in a range from one third to three times the mean value. In addition, we found a twentyfold increase of light transmittance as a result of partial snowmelt, showing the seasonal evolution of transmittance through sea ice far exceeds the spatial variability. However, prior melt onset, light transmittance was time invariant and differences in under-ice irradiance were directly related to the spatial variability of the snow cover. © 2013 Author(s).
学科领域	chlorophyll; ice core; ice thickness; irradiance; irradiation; light scattering; particulate matter; physical property; sea ice; snowmelt; solar radiation; spring (season); transmittance; Alaska; Barrow; United States
语种	英语
scopus关键词	chlorophyll; ice core; ice thickness; irradiance; irradiation; light scattering; particulate matter; physical property; sea ice; snowmelt; solar radiation; spring (season); transmittance; Alaska; Barrow; United States
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/120285
作者单位	Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar-und Meeresforschung, Bremerhaven, Germany; Norut Narvik AS, Narvik, Norway; Norwegian Polar Institute, Fram Centre, Tromsø, Norway
推荐引用方式 GB/T 7714	Nicolaus M.,Petrich C.,Hudson S.R.,et al. Variability of light transmission through Arctic land-fast sea ice during spring[J],2013,7(3).
APA	Nicolaus M.,Petrich C.,Hudson S.R.,&Granskog M.A..(2013).Variability of light transmission through Arctic land-fast sea ice during spring.Cryosphere,7(3).
MLA	Nicolaus M.,et al."Variability of light transmission through Arctic land-fast sea ice during spring".Cryosphere 7.3(2013).