globalchange  > 科学计划与规划
DOI: 10.1002/2015GL066645
论文题名:
Oxidation of mercury by bromine in the subtropical Pacific free troposphere
作者: Gratz L.E.; Ambrose J.L.; Jaffe D.A.; Shah V.; Jaeglé L.; Stutz J.; Festa J.; Spolaor M.; Tsai C.; Selin N.E.; Song S.; Zhou X.; Weinheimer A.J.; Knapp D.J.; Montzka D.D.; Flocke F.M.; Campos T.L.; Apel E.; Hornbrook R.; Blake N.J.; Hall S.; Tyndall G.S.; Reeves M.; Stechman D.; Stell M.
刊名: Geophysical Research Letters
ISSN: 0094-8347
EISSN: 1944-8078
出版年: 2015
卷: 42, 期:23
起始页码: 10494
结束页码: 10502
语种: 英语
英文关键词: airborne measurements ; bromine radicals ; free troposphere ; NOMADSS ; oxidized mercury
Scopus关键词: Atmospheric chemistry ; Atmospheric movements ; Bromine ; Mercury (metal) ; Meteorological problems ; Oxidants ; Troposphere ; Air mass back trajectories ; Airborne measurements ; Atmospheric conditions ; Atmospheric depositions ; Free troposphere ; NOMADSS ; Oxidized mercury ; Trace gas measurement ; Oxidation ; air mass ; airborne survey ; atmospheric chemistry ; atmospheric deposition ; bromine ; mercury (element) ; oxidation ; radical ; trace gas ; troposphere ; Pacific Ocean ; Pacific Ocean (Subtropical) ; Texas ; United States
英文摘要: Mercury is a global toxin that can be introduced to ecosystems through atmospheric deposition. Mercury oxidation is thought to occur in the free troposphere by bromine radicals, but direct observational evidence for this process is currently unavailable. During the 2013 Nitrogen, Oxidants, Mercury and Aerosol Distributions, Sources and Sinks campaign, we measured enhanced oxidized mercury and bromine monoxide in a free tropospheric air mass over Texas. We use trace gas measurements, air mass back trajectories, and a chemical box model to confirm the origin and chemical history of the sampled air mass. We find the presence of elevated oxidized mercury to be consistent with oxidation of elemental mercury by bromine atoms in this subsiding upper tropospheric air mass within the subtropical Pacific High, where dry atmospheric conditions are conducive to oxidized mercury accumulation. Our results support the role of bromine as the dominant oxidant of mercury in the upper troposphere. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953637753&doi=10.1002%2f2015GL066645&partnerID=40&md5=851a94cfe6636a24d76dec59443811ae
Citation statistics:
被引频次[WOS]:60   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7963
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Environmental Program, Colorado College, Colorado Springs, CO, United States

Recommended Citation:
Gratz L.E.,Ambrose J.L.,Jaffe D.A.,et al. Oxidation of mercury by bromine in the subtropical Pacific free troposphere[J]. Geophysical Research Letters,2015-01-01,42(23).
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