Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-11345-2018 |
Size-resolved mixing state of black carbon in the Canadian high Arctic and implications for simulated direct radiative effect | |
Kodros, John K.1; Hanna, Sarah J.2; Bertram, Allan K.2; Leaitch, W. Richard3; Schulz, Hannes4; Herber, Andreas B.4; Zanatta, Marco4; Burkart, Julia5; Willis, Megan D.5; Abbatt, Jonathan P. D.5; Pierce, Jeffrey R.1 | |
2018-08-14 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:15页码:11345-11361 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Germany |
英文摘要 | Transport of anthropogenic aerosol into the Arctic in the spring months has the potential to affect regional climate; however, modeling estimates of the aerosol direct radiative effect (DRE) are sensitive to uncertainties in the mixing state of black carbon (BC). A common approach in previous modeling studies is to assume an entirely external mixture (all primarily scattering species are in separate particles from BC) or internal mixture (all primarily scattering species are mixed in the same particles as BC). To provide constraints on the size-resolved mixing state of BC, we use airborne single-particle soot photometer (SP2) and ultrahigh-sensitivity aerosol spectrometer (UHSAS) measurements from the Alfred Wegener Institute (AWI) Polar 6 flights from the NETCARE/PAMARCMIP2015 campaign to estimate coating thickness as a function of refractory BC (rBC) core diameter and the fraction of particles containing rBC in the springtime Canadian high Arctic. For rBC core diameters in the range of 140 to 220 nm, we find average coating thicknesses of approximately 45 to 40 nm, respectively, resulting in ratios of total particle diameter to rBC core diameters ranging from 1.6 to 1.4. For total particle diameters ranging from 175 to 730 nm, rBC-containing particle number fractions range from 16% to 3 %, respectively. We combine the observed mixing-state constraints with simulated size-resolved aerosol mass and number distributions from GEOS-Chem-TOMAS to estimate the DRE with observed bounds on mixing state as opposed to assuming an entirely external or internal mixture. We find that the pan-Arctic average springtime DRE ranges from -1.65 to -1.34 W m(-2) when assuming entirely externally or internally mixed BC. This range in DRE is reduced by over a factor of 2 (-1.59 to -1.45 W m(-2)) when using the observed mixing-state constraints. The difference in DRE between the two observed mixing-state constraints is due to an underestimation of BC mass fraction in the springtime Arctic in GEOS-Chem-TOMAS compared to Polar 6 observations. Measurements of mixing state provide important constraints for model estimates of DRE. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441651800001 |
WOS关键词 | PARTICLE SOOT PHOTOMETER ; LIGHT-ABSORPTION ENHANCEMENT ; MARINE BOUNDARY-LAYER ; OPTICAL-PROPERTIES ; AEROSOL ; TRANSPORT ; SENSITIVITY ; MODEL ; CYCLE ; DISTRIBUTIONS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/20577 |
专题 | 地球科学 |
作者单位 | 1.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA; 2.Univ British Columbia, Dept Chem, Vancouver, BC, Canada; 3.Environm & Climate Change Canada, Climate Res Div, 4905 Dufferin St, Toronto, ON M3H 5T4, Canada; 4.Alfred Wegener Inst Helmholtz Ctr Polar & Marine, Bremerhaven, Germany; 5.Univ Toronto, Dept Chem, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Kodros, John K.,Hanna, Sarah J.,Bertram, Allan K.,et al. Size-resolved mixing state of black carbon in the Canadian high Arctic and implications for simulated direct radiative effect[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(15):11345-11361. |
APA | Kodros, John K..,Hanna, Sarah J..,Bertram, Allan K..,Leaitch, W. Richard.,Schulz, Hannes.,...&Pierce, Jeffrey R..(2018).Size-resolved mixing state of black carbon in the Canadian high Arctic and implications for simulated direct radiative effect.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(15),11345-11361. |
MLA | Kodros, John K.,et al."Size-resolved mixing state of black carbon in the Canadian high Arctic and implications for simulated direct radiative effect".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.15(2018):11345-11361. |
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