气候变化领域集成服务门户(CCPortal): Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska

CCPortal

DOI	10.1029/2019JD032240
	Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska
	Mori T.; Kondo Y.; Ohata S.; Zhao Y.; Sinha P.R.; Oshima N.; Matsui H.; Moteki N.; Koike M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	Black carbon (BC) aerosol deposited in and onto Arctic snow increases the snow's absorption of sunlight and accelerates snowmelt. Wet removal of BC from the atmosphere plays a key role in determining its abundance in the Arctic atmosphere and in Arctic snow. However, this process is poorly understood, mainly due to the scarcity of relevant measurements. To study wet deposition of BC, we made measurements of mass concentration of BC in snow and rain (CMBC) and of BC in air (MBC) with high accuracy (16% and 10%, respectively) at the Barrow Atmospheric Baseline Observatory, Alaska, from July 2013 to August 2017 and analyzed them along with routinely measured meteorological parameters from Barrow. Monthly mean MBC near the surface and CMBC were poorly correlated from midwinter to early spring, when CMBC was close to the annual median while MBC was at its annual peak. Seasonal variations in the altitude distribution of MBC may lead to these differences in seasonal variation of MBC near the surface and CMBC. About 50% of the annual wet deposition of BC occurred in the 3 months of summer, associated with high values of total precipitation and BC originating from biomass burning. Size distributions of BC in snow and rain were stable throughout the year, suggesting that the size distribution of BC in the lower troposphere was similarly stable. Calculations by two global models reproduced the observed seasonal variations of CMBC and showed that BC from biomass burning dominated CMBC in summer. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	a single-particle soot photometer; Arctic; biomass burning; black carbon; seasonal variations; wet deposition
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185840
作者单位	Department of Physics, Faculty of Science Division I, Tokyo University of Science, Tokyo, Japan; National Institute of Polar Research, Tachikawa, Japan; Institute for Space–Earth Environmental Research, Nagoya University, Nagoya, Japan; Institute for Advanced Research, Nagoya University, Nagoya, Japan; Air Quality Research Center, University of California, Davis, CA, United States; Department of Earth and Space Sciences, Indian Institute of Space Science and Technology, Thiruvananthapuram, India; Meteorological Research Institute, Tsukuba, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Mori T.,Kondo Y.,Ohata S.,et al. Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska[J],2020,125(16).
APA	Mori T..,Kondo Y..,Ohata S..,Zhao Y..,Sinha P.R..,...&Koike M..(2020).Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Mori T.,et al."Seasonal Variation of Wet Deposition of Black Carbon in Arctic Alaska".Journal of Geophysical Research: Atmospheres 125.16(2020).