气候变化领域集成服务门户(CCPortal): Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic

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DOI	10.5194/acp-20-8139-2020
	Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic
	Donth T.; Jakel E.; Ehrlich A.; Heinold B.; Schacht J.; Herber A.; Zanatta M.; Wendisch M.
发表日期	2020
ISSN	1680-7316
起始页码	8139
结束页码	8156
卷号	20 期号:13
英文摘要	The magnitude of solar radiative effects (cooling or warming) of black carbon (BC) particles embedded in the Arctic atmosphere and surface snow layer was explored on the basis of case studies. For this purpose, combined atmospheric and snow radiative transfer simulations were performed for cloudless and cloudy conditions on the basis of BC mass concentrations measured in pristine early summer and more polluted early spring conditions. The area of interest is the remote sea-ice-covered Arctic Ocean in the vicinity of Spitsbergen, northern Greenland, and northern Alaska typically not affected by local pollution. To account for the radiative interactions between the black-carbon-containing snow surface layer and the atmosphere, an atmospheric and snow radiative transfer model were coupled iteratively. For pristine summer conditions (no atmospheric BC, minimum solar zenith angles of 55 ) and a representative BC particle mass concentration of 5 ng g-1 in the surface snow layer, a positive daily mean solar radiative forcing of +0.2 W m-2 was calculated for the surface radiative budget. A higher load of atmospheric BC representing early springtime conditions results in a slightly negative mean radiative forcing at the surface of about -0.05 W m-2, even when the low BC mass concentration measured in the pristine early summer conditions was embedded in the surface snow layer. The total net surface radiative forcing combining the effects of BC embedded in the atmosphere and in the snow layer strongly depends on the snow optical properties (snow specific surface area and snow density). For the conditions over the Arctic Ocean analyzed in the simulations, it was found that the atmospheric heating rate by water vapor or clouds is 1 to 2 orders of magnitude larger than that by atmospheric BC. Similarly, the daily mean total heating rate (6 K d-1) within a snowpack due to absorption by the ice was more than 1 order of magnitude larger than that of atmospheric BC (0.2 K d-1). Also, it was shown that the cooling by atmospheric BC of the near-surface air and the warming effect by BC embedded in snow are reduced in the presence of clouds. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	black carbon; radiation budget; radiative forcing; radiative transfer; snowpack; solar radiation; Alaska; Arctic; Arctic Ocean; Greenland; Spitsbergen; Svalbard; Svalbard and Jan Mayen; United States
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247658
作者单位	Leipzig Institute for Meteorology (LIM), University of Leipzig, Leipzig, Germany; Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, Germany; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven, Germany
推荐引用方式 GB/T 7714	Donth T.,Jakel E.,Ehrlich A.,et al. Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic[J],2020,20(13).
APA	Donth T..,Jakel E..,Ehrlich A..,Heinold B..,Schacht J..,...&Wendisch M..(2020).Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(13).
MLA	Donth T.,et al."Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.13(2020).