Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1557-2017 |
Halogen chemistry reduces tropospheric O-3 radiative forcing | |
Sherwen, Tomas1; Evans, Mat J.1,2; Carpenter, Lucy J.1; Schmidt, Johan A.3; Mickley, Loretta J.4 | |
2017-01-31 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Denmark; USA |
英文摘要 | Tropospheric ozone (O-3) is a global warming gas, but the lack of a firm observational record since the preindustrial period means that estimates of its radiative forcing (RFTO3) rely on model calculations. Recent observational evidence shows that halogens are pervasive in the troposphere and need to be represented in chemistry-transport models for an accurate simulation of present-day O-3. Using the GEOS-Chem model we show that tropospheric halogen chemistry is likely more active in the present day than in the preindustrial. This is due to increased oceanic iodine emissions driven by increased surface O-3, higher anthropogenic emissions of bromo-carbons, and an increased flux of bromine from the stratosphere. We calculate preindustrial to present-day increases in the tropospheric O-3 burden of 113 Tg without halogens but only 90 Tg with, leading to a reduction in RFTO3 from 0.43 to 0.35 Wm(-2). We attribute similar to 50% of this reduction to increased bromine flux from the stratosphere, similar to 35% to the ocean-atmosphere iodine feedback, and similar to 15% to increased tropospheric sources of anthropogenic halogens. This reduction of tropospheric O-3 radiative forcing due to halogens (0.087W m(-2)) is greater than that from the radiative forcing of stratospheric O-3 (similar to 0.05 Wm(-2)). Estimates of RFTO3 that fail to consider halogen chemistry are likely overestimates (similar to 25 %). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394610700009 |
WOS关键词 | GAS-PHASE REACTIONS ; BIOMASS BURNING EMISSIONS ; ATMOSPHERIC CHEMISTRY ; PHOTOCHEMICAL DATA ; IODINE CHEMISTRY ; HETEROGENEOUS REACTIONS ; OZONE MEASUREMENTS ; BROMINE CHEMISTRY ; EASTERN PACIFIC ; AIR-QUALITY |
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/28352 |
专题 | 地球科学 |
作者单位 | 1.Univ York, Dept Chem, Wolfson Atmospher Chem Labs, York YO10 5DD, N Yorkshire, England; 2.Univ York, Natl Ctr Atmospher Sci, York YO10 5DD, N Yorkshire, England; 3.Univ Copenhagen, Dept Chem, Univ Pk, DK-2100 Copenhagen O, Denmark; 4.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Sherwen, Tomas,Evans, Mat J.,Carpenter, Lucy J.,et al. Halogen chemistry reduces tropospheric O-3 radiative forcing[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Sherwen, Tomas,Evans, Mat J.,Carpenter, Lucy J.,Schmidt, Johan A.,&Mickley, Loretta J..(2017).Halogen chemistry reduces tropospheric O-3 radiative forcing.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Sherwen, Tomas,et al."Halogen chemistry reduces tropospheric O-3 radiative forcing".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
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