Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-9291-2017 |
Horizontal and vertical structure of reactive bromine events probed by bromine monoxide MAX-DOAS | |
Simpson, William R.1,2; Peterson, Peter K.3; Friess, Udo4; Sihler, Holger5; Lampel, Johannes4,5; Platt, Ulrich4; Moore, Chris6; Pratt, Kerri3; Shepson, Paul7; Halfacre, John7,9; Nghiem, Son V.8 | |
2017-08-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:15 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Heterogeneous photochemistry converts bromide (Br) to reactive bromine species (Br atoms and bromine monoxide, BrO) that dominate Arctic springtime chemistry. This phenomenon has many impacts such as boundary-layer ozone depletion, mercury oxidation and deposition, and modification of the fate of hydrocarbon species. To study environmental controls on reactive bromine events, the BRomine, Ozone, and Mercury EXperiment (BROMEX) was carried out from early March to mid-April 2012 near Barrow (Utqiagvik), Alaska. We measured horizontal and vertical gradients in BrO with multiple-axis differential optical absorption spectroscopy (MAX-DOAS) instrumentation at three sites, two mobile and one fixed. During the campaign, a large crack in the sea ice (an open lead) formed pushing one instrument package similar to 250 km downwind from Barrow (Utqiagvik). Convection associated with the open lead converted the BrO vertical structure from a surface-based event to a lofted event downwind of the lead influence. The column abundance of BrO downwind of the refreezing lead was comparable to upwind amounts, indicating direct reactions on frost flowers or open seawater was not a major reactive bromine source. When these three sites were separated by similar to 30 km length scales of unbroken sea ice, the BrO amount and vertical distributions were highly correlated for most of the time, indicating the horizontal length scales of BrO events were typically larger than similar to 30 km in the absence of sea ice features. Although BrO amount and vertical distribution were similar between sites most of the time, rapid changes in BrO with edges significantly smaller than this similar to 30 km length scale episodically transported between the sites, indicating BrO events were large but with sharp edge contrasts. BrO was often found in shallow layers that recycled reactive bromine via heterogeneous reactions on snowpack. Episodically, these surface-based events propagated aloft when aerosol extinction was higher (> 0.1 km(-1)) however, the presence of aerosol particles aloft was not sufficient to produce BrO aloft. Highly depleted ozone (< 1 nmol mol(-1) ) repartitioned reactive bromine away from BrO and drove BrO events aloft in cases. This work demonstrates the interplay between atmospheric mixing and heterogeneous chemistry that affects the vertical structure and horizontal extent of reactive bromine events. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407201800002 |
WOS关键词 | OZONE DEPLETION EVENTS ; ARCTIC BOUNDARY-LAYER ; POLAR TROPOSPHERIC OZONE ; SEA-SALT AEROSOL ; FROST FLOWERS ; HETEROGENEOUS REACTIONS ; ATMOSPHERIC CHEMISTRY ; MODELING CHEMISTRY ; HALOGEN ACTIVATION ; MOLECULAR BROMINE |
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/28407 |
专题 | 地球科学 |
作者单位 | 1.Univ Alaska, Geophys Inst, Fairbanks, AK 99775 USA; 2.Univ Alaska, Dept Chem & Biochem, Fairbanks, AK 99775 USA; 3.Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA; 4.Heidelberg Univ, Inst Environm Phys, Heidelberg, Germany; 5.Max Planck Inst Chem, Satellite Remote Sensing Grp, Mainz, Germany; 6.Gas Technol Inst, Des Plaines, IL USA; 7.Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA; 8.CALTECH, Jet Prop Lab, Pasadena, CA USA; 9.Indiana Univ Southeast, Dept Chem, New Albany, IN 47150 USA |
推荐引用方式 GB/T 7714 | Simpson, William R.,Peterson, Peter K.,Friess, Udo,et al. Horizontal and vertical structure of reactive bromine events probed by bromine monoxide MAX-DOAS[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(15). |
APA | Simpson, William R..,Peterson, Peter K..,Friess, Udo.,Sihler, Holger.,Lampel, Johannes.,...&Nghiem, Son V..(2017).Horizontal and vertical structure of reactive bromine events probed by bromine monoxide MAX-DOAS.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(15). |
MLA | Simpson, William R.,et al."Horizontal and vertical structure of reactive bromine events probed by bromine monoxide MAX-DOAS".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.15(2017). |
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