Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-3401-2017 |
Bromine atom production and chain propagation during springtime Arctic ozone depletion events in Barrow, Alaska | |
Thompson, Chelsea R.1,6,7; Shepson, Paul B.1,2,3; Liao, Jin4,8,9; Huey, L. Greg4; Cantrell, Chris5,10; Flocke, Frank5; Orlando, John5 | |
2017-03-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Ozone depletion events (ODEs) in the Arctic are primarily controlled by a bromine radical-catalyzed destruction mechanism that depends on the efficient production and recycling of Br atoms. Numerous laboratory and modeling studies have suggested the importance of heterogeneous recycling of Br through HOBr reaction with bromide on saline surfaces. On the other hand, the gas-phase regeneration of bromine atoms through BrO-BrO radical reactions has been assumed to be an efficient, if not dominant, pathway for Br reformation and thus ozone destruction. Indeed, it has been estimated that the rate of ozone depletion is approximately equal to twice the rate of the BrO self-reaction. Here, we use a zero-dimensional, photochemical model, largely constrained to observations of stable atmospheric species from the 2009 Ocean-Atmosphere-Sea Ice-Snowpack (OASIS) campaign in Barrow, Alaska, to investigate gas-phase bromine radical propagation and recycling mechanisms of bromine atoms for a 7-day period during late March. This work is a continuation of that presented in Thompson et al. (2015) and utilizes the same model construct. Here, we use the gas-phase radical chain length as a metric for objectively quantifying the efficiency of gas-phase recycling of bromine atoms. The gas-phase bromine chain length is de-termined to be quite small, at < 1.5, and highly dependent on ambient O-3 concentrations. Furthermore, we find that Br atom production from photolysis of Br-2 and BrCl, which is predominately emitted from snow and/or aerosol surfaces, can account for between 30 and 90% of total Br atom production. This analysis suggests that condensed-phase production of bromine is at least as important as, and at times greater than, gas-phase recycling for the occurrence of Arctic ODEs. Therefore, the rate of the BrO self-reaction is not a sufficient estimate for the rate of O-3 depletion. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397795000002 |
WOS关键词 | MARINE BOUNDARY-LAYER ; GAS-PHASE REACTIONS ; SUNRISE EXPERIMENT 1992 ; POLAR SUNRISE ; ATMOSPHERIC CHEMISTRY ; TROPOSPHERIC OZONE ; PHOTOCHEMICAL DATA ; ABSORPTION SPECTROMETER ; MOLECULAR BROMINE ; ORGANIC-COMPOUNDS |
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/20556 |
专题 | 地球科学 |
作者单位 | 1.Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA; 2.Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA; 3.Purdue Univ, Purdue Climate Change Res Ctr, W Lafayette, IN 47907 USA; 4.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 5.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 6.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 7.NOAA, Div Chem Sci, Earth Syst Res Lab, Boulder, CO 80305 USA; 8.NASA, Atmospher Chem & Dynam Lab, Goddard Space Flight Ctr, Greenbelt, MD USA; 9.Univ Space Res Assoc, Columbia, MD USA; 10.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Thompson, Chelsea R.,Shepson, Paul B.,Liao, Jin,et al. Bromine atom production and chain propagation during springtime Arctic ozone depletion events in Barrow, Alaska[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(5). |
APA | Thompson, Chelsea R..,Shepson, Paul B..,Liao, Jin.,Huey, L. Greg.,Cantrell, Chris.,...&Orlando, John.(2017).Bromine atom production and chain propagation during springtime Arctic ozone depletion events in Barrow, Alaska.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(5). |
MLA | Thompson, Chelsea R.,et al."Bromine atom production and chain propagation during springtime Arctic ozone depletion events in Barrow, Alaska".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.5(2017). |
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