Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-7335-2020 |
Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O-3 in the Arctic | |
Huang, Jiayue1; Jaegle, Lyatt1; Chen, Qianjie1,7; Alexander, Becky1; Sherwen, Tomas2,3; Evans, Mat J.2,3; Theys, Nicolas4; Choi, Sungyeon5,6 | |
2020-06-25 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:12页码:7335-7358 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Belgium |
英文摘要 | We use the GEOS-Chem chemical transport model to examine the influence of bromine release from blowing-snow sea salt aerosol (SSA) on springtime bromine activation and O-3 depletion events (ODEs) in the Arctic lower troposphere. We evaluate our simulation against observations of tropospheric BrO vertical column densities (VCDtropo) from the GOME-2 (second Global Ozone Monitoring Experiment) and Ozone Monitoring Instrument (OMI) spaceborne instruments for 3 years (2007-2009), as well as against surface observations of O-3. We conduct a simulation with blowing-snow SSA emissions from first-year sea ice (FYI; with a surface snow salinity of 0.1 psu) and multi-year sea ice (MYI; with a surface snow salinity of 0.05 psu), assuming a factor of 5 bromide enrichment of surface snow relative to sea-water. This simulation captures the magnitude of observed March-April GOME-2 and OMI VCDtropo to within 17 %, as well as their spatiotemporal variability (r = 0.76-0.85). Many of the large-scale bromine explosions are successfully reproduced, with the exception of events in May, which are absent or systematically underpredicted in the model. If we assume a lower salinity on MYI (0.01 psu), some of the bromine explosions events observed over MYI are not captured, suggesting that blowing snow over MYI is an important source of bromine activation. We find that the modeled atmospheric deposition onto snow-covered sea ice becomes highly enriched in bromide, increasing from enrichment factors of similar to 5 in September-February to 10-60 in May, consistent with composition observations of freshly fallen snow. We propose that this progressive enrichment in deposition could enable blowing-snow-induced halogen activation to propagate into May and might explain our late-spring underestimate in VCDtropo. We estimate that the atmospheric deposition of SSA could increase snow salinity by up to 0.04 psu between February and April, which could be an important source of salinity for surface snow on MYI as well as FYI covered by deep snowpack. Inclusion of halogen release from blowing-snow SSA in our simulations decreases monthly mean Arctic surface O-3 by 4-8 ppbv (15%-30%) in March and 8-14 ppbv (30%-40%) in April. We reproduce a transport event of depleted O-3 Arctic air down to 40 degrees N observed at many sub-Arctic surface sites in early April 2007. While our simulation captures 25%-40% of the ODEs observed at coastal Arctic surface sites, it underestimates the magnitude of many of these events and entirely misses 60%-75% of ODEs. This difficulty in reproducing observed surface ODEs could be related to the coarse horizontal resolution of the model, the known biases in simulating Arctic boundary layer exchange processes, the lack of detailed chlorine chemistry, and/or the fact that we did not include direct halogen activation by snowpack chemistry. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000543786800002 |
WOS关键词 | SURFACE OZONE DEPLETION ; BROMINE EXPLOSION EVENT ; BOUNDARY-LAYER ; TROPOSPHERIC BRO ; POLAR SUNRISE ; ATMOSPHERIC CHEMISTRY ; VERTICAL-DISTRIBUTION ; CHEMICAL-COMPOSITION ; HALOGEN DEPOSITION ; MOLECULAR BROMINE |
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/278052 |
专题 | 地球科学 |
作者单位 | 1.Univ Washington, Dept Atmospher Sci, Seattle, WA 98115 USA; 2.Univ York, Dept Chem, Wolfson Atmospher Chem Labs, York YO10 5DD, N Yorkshire, England; 3.Univ York, Natl Ctr Atmospher Sci, York YO10 5DD, N Yorkshire, England; 4.Royal Belgian Inst Space Aeron BIRA IASB, Brussels, Belgium; 5.Sci Syst & Applicat Inc, Lanham, MD 20706 USA; 6.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA; 7.Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Huang, Jiayue,Jaegle, Lyatt,Chen, Qianjie,et al. Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O-3 in the Arctic[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(12):7335-7358. |
APA | Huang, Jiayue.,Jaegle, Lyatt.,Chen, Qianjie.,Alexander, Becky.,Sherwen, Tomas.,...&Choi, Sungyeon.(2020).Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O-3 in the Arctic.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12),7335-7358. |
MLA | Huang, Jiayue,et al."Evaluating the impact of blowing-snow sea salt aerosol on springtime BrO and O-3 in the Arctic".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020):7335-7358. |
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