DOI: 10.5194/tc-15-183-2021
论文题名: New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
作者: Katlein C. ; Valcic L. ; Lambert-Girard S. ; Hoppmann M.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 1 起始页码: 183
结束页码: 198
语种: 英语
英文摘要: The radiative transfer of shortwave solar radiation through the sea ice cover of the polar oceans is a crucial aspect of energy partitioning at the atmosphere-ice-ocean interface. A detailed understanding of how sunlight is reflected and transmitted by the sea ice cover is needed for an accurate representation of critical processes in climate and ecosystem models, such as the ice-albedo feedback. Due to the challenges associated with ice internal measurements, most information about radiative transfer in sea ice has been gained by optical measurements above and below the sea ice. To improve our understanding of radiative transfer processes within the ice itself, we developed a new kind of instrument equipped with a number of multispectral light sensors that can be frozen into the ice. A first prototype consisting of a 2.3 m long chain of 48 sideward planar irradiance sensors with a vertical spacing of 0.05 m was deployed at the geographic North Pole in late August 2018, providing autonomous, vertically resolved light measurements within the ice cover during the autumn season. Here we present the first results of this instrument, discuss the advantages and application of the prototype, and provide first new insights into the spatiotemporal aspect of radiative transfer within the sea ice itself. In particular, we investigate how measured attenuation coefficients relate to the optical properties of the ice pack and show that sideward planar irradiance measurements are equivalent to measurements of total scalar irradiance. © 2021 Copernicus GmbH. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164720
Appears in Collections: 气候变化与战略
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作者单位: Alfred-Wegener-Institut, Hemholtz-Zentrum für Polar- und Meeresforschung, Sea Ice Physics, Bremerhaven, Germany; Takuvik Joint International Laboratory, Université Laval and CNRS (France), Québec, QC, Canada; Bruncin Observation Systems, Zagreb, Croatia
Recommended Citation:
Katlein C.,Valcic L.,Lambert-Girard S.,et al. New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements[J]. Cryosphere,2021-01-01,15(1)