Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-6095-2020 |
Deposition of brown carbon onto snow: changes in snow optical and radiative properties | |
Beres, Nicholas D.1,2,3; Sengupta, Deep1,2; Samburova, Vera1; Khlystov, Andrey Y.1; Moosmueller, Hans1 | |
2020-05-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:10页码:6095-6114 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Austria |
英文摘要 | Light-absorbing organic carbon aerosol - colloquially known as brown carbon (BrC) - is emitted from combustion processes and has a brownish or yellowish visual appearance, caused by enhanced light absorption at shorter visible and ultraviolet wavelengths (0.3 mu m less than or similar to lambda less than or similar to 0.5 mu m). Recently, optical properties of atmospheric BrC aerosols have become the topic of intense research, but little is known about how BrC deposition onto snow surfaces affects the spectral snow albedo, which can alter the resulting radiative forcing and in-snow photochemistry. Wildland fires in close proximity to the cryosphere, such as peatland fires that emit large quantities of BrC, are becoming more common at high latitudes, potentially affecting nearby snow and ice surfaces. In this study, we describe the artificial deposition of BrC aerosol with known optical, chemical, and physical properties onto the snow surface, and we monitor its spectral radiative impact and compare it directly to modeled values. First, using small-scale combustion of Alaskan peat, BrC aerosols were artificially deposited onto the snow surface. UV-Vis absorbance and total organic carbon (TOC) concentration of snow samples were measured for samples with and without artificial BrC deposition. These measurements were used to first derive a BrC (mass) specific absorption (m(2) g(-1)) across the UV-Vis spectral range. We then estimate the imaginary part of the refractive index of deposited BrC aerosol using a volume mixing rule. Single-particle optical properties were calculated using Mie theory, and these values were used to show that the measured spectral snow albedo of snow with deposited BrC was in general agreement with modeled spectral snow albedo using calculated BrC optical properties. The instantaneous radiative forcing per unit mass of total organic carbon deposited to the ambient snowpack was found to be 1.23 (+0.14/-0.11) W m(-2) per part per million (ppm). We estimate the same deposition onto a pure snowpack without light-absorbing impurities would have resulted in an instantaneous radiative forcing per unit mass of 2.68 (+0.27/-0.22) W m(-2) per ppm of BrC deposited. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537577300001 |
WOS关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS ; LIGHT-ABSORBING PARTICLES ; BIOMASS-BURNING EMISSIONS ; DISSOLVED ORGANIC-CARBON ; SINGLE SCATTERING ALBEDO ; BLACK CARBON ; SPECTRAL ALBEDO ; SIERRA-NEVADA ; ABSORPTION CHARACTERISTICS ; SPHERICAL-PARTICLES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/271610 |
专题 | 地球科学 |
作者单位 | 1.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA; 2.Univ Nevada, Dept Phys, Reno, NV 89557 USA; 3.Univ Vienna, Aerosol & Environm Phys, Vienna, Austria |
推荐引用方式 GB/T 7714 | Beres, Nicholas D.,Sengupta, Deep,Samburova, Vera,et al. Deposition of brown carbon onto snow: changes in snow optical and radiative properties[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(10):6095-6114. |
APA | Beres, Nicholas D.,Sengupta, Deep,Samburova, Vera,Khlystov, Andrey Y.,&Moosmueller, Hans.(2020).Deposition of brown carbon onto snow: changes in snow optical and radiative properties.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(10),6095-6114. |
MLA | Beres, Nicholas D.,et al."Deposition of brown carbon onto snow: changes in snow optical and radiative properties".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.10(2020):6095-6114. |
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