Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1900613116 |
Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion | |
Wang, Siyuan1,8; McNamara, Stephen M.1; Moore, Christopher W.2,9; Obrist, Daniel2,10; Steffen, Alexandra3; Shepson, Paul B.4,5,6,11; Staebler, Ralf M.3; Raso, Angela R. W.4; Pratt, Kerri A.1,7 | |
2019 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2019 |
卷号 | 116期号:29页码:14479-14484 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Bromine atoms play a central role in atmospheric reactive halogen chemistry, depleting ozone and elemental mercury, thereby enhancing deposition of toxic mercury, particularly in the Arctic near-surface troposphere. However, direct bromine atom measurements have been missing to date, due to the lack of analytical capability with sufficient sensitivity for ambient measurements. Here we present direct atmospheric bromine atom measurements, conducted in the springtime Arctic. Measured bromine atom levels reached 14 parts per trillion (ppt, pmol mol(-1); 4.2 x 10(8) atoms per cm(-3)) and were up to 3-10 times higher than estimates using previous indirect measurements not considering the critical role of molecular bromine. Observed ozone and elemental mercury depletion rates are quantitatively explained by the measured bromine atoms, providing field validation of highly uncertain mercury chemistry. Following complete ozone depletion, elevated bromine concentrations are sustained by photochemical snowpack emissions of molecular bromine and nitrogen oxides, resulting in continued atmospheric mercury depletion. This study provides a breakthrough in quantitatively constraining bromine chemistry in the polar atmosphere, where this chemistry connects the rapidly changing surface to pollutant fate. |
英文关键词 | atmosphere bromine ozone mercury |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475610000018 |
WOS关键词 | TROPOSPHERIC OZONE ; HALOGEN CHEMISTRY ; POLAR SUNRISE ; CLIMATE ; MONOXIDE ; CHLORINE ; SURFACE ; EVENTS ; BARROW ; ALERT |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/205144 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA; 2.Desert Res Inst, Div Atmospher Sci, Reno, NV 89523 USA; 3.Environm & Climate Change Canada, Air Qual Proc Res Sect, Toronto, ON M3H 5T4, Canada; 4.Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA; 5.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; 6.Purdue Univ, Purdue Climate Change Res Ctr, W Lafayette, IN 47907 USA; 7.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; 8.Natl Ctr Atmospher Res, Atmospher Chem Observat & Modeling, Boulder, CO 80307 USA; 9.Gas Technol Inst, Des Plaines, IL 60018 USA; 10.Univ Massachusetts, Dept Environm Earth & Atmospher Sci, Lowell, MA 01854 USA; 11.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA |
推荐引用方式 GB/T 7714 | Wang, Siyuan,McNamara, Stephen M.,Moore, Christopher W.,et al. Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(29):14479-14484. |
APA | Wang, Siyuan.,McNamara, Stephen M..,Moore, Christopher W..,Obrist, Daniel.,Steffen, Alexandra.,...&Pratt, Kerri A..(2019).Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(29),14479-14484. |
MLA | Wang, Siyuan,et al."Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.29(2019):14479-14484. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论