globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025757
论文题名:
Impacts of coal dust from an active mine on the spectral reflectance of Arctic surface snow in Svalbard, Norway
作者: Khan A.L.; Dierssen H.; Schwarz J.P.; Schmitt C.; Chlus A.; Hermanson M.; Painter T.H.; McKnight D.M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期:3
起始页码: 1767
结束页码: 1778
语种: 英语
英文关键词: albedo ; Arctic ; black carbon ; coal mine ; light-absorbing aerosols ; snow
Scopus关键词: absorption ; albedo ; black carbon ; coal mine ; dust ; global climate ; melting ; mine waste ; particle size ; radiative forcing ; sea ice ; snow ; spectral reflectance ; Arctic ; Svalbard ; Svalbard and Jan Mayen
英文摘要: Light-absorbing particles (LAPs) in snow such as dust and black carbon influence the radiative forcing at the Earth's surface, which has major implications for global climate models. LAPs also significantly influence the melting of glaciers, sea ice, and seasonal snow. Here we present an in situ study of surface snow near an active coal mine in the Norwegian Arctic. We couple measurements of spectral hemispherical directional reflectance factor (HDRF) with measurements of LAPs characterized in two ways, as refractory black carbon using a Single Particle Soot Photometer and the total light absorption of LAPs measured with the Light Absorption Heating Method. The Snow Ice and Aerosol Radiation model was constrained by LAP measurements. Results were compared to observed spectral albedo measurements. Modeled and observed albedos were similar at the cleaner and more remote sites. However, the modeled spectral albedos do not fully account for the low spectral albedo measured next to the mine. LAP measurements also showed a large variation in particle sizes (tenths to tens of microns) related to transport distance of the particles from the mine. Here we find that LAPs from coal dust reduce the spectral HDRF by up to 84% next to the mine and 55% 0.5 km downwind of the mine. The coupling of extreme LAP observations (1 ng g−1 to 4863 ng g−1) with HDRF measurements from 350 to 2500 nm has facilitated the development of spectral band pairs, which could be used in the future to remotely assess LAPs in Arctic snow. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62708
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Department of Civil and Environmental Engineering and Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; National Snow and Ice Data Center, University of Colorado Boulder, Boulder, CO, United States; Department of Marine Sciences, University of Connecticut, Storrs, CT, United States; National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States; Department of Arctic Technology, University Center on Svalbard, Longyearbyen, Svalbard and Jan Mayen; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States

Recommended Citation:
Khan A.L.,Dierssen H.,Schwarz J.P.,et al. Impacts of coal dust from an active mine on the spectral reflectance of Arctic surface snow in Svalbard, Norway[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(3)
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