Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-14071-2019 |
Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations | |
Asher, Elizabeth1; Hornbrook, Rebecca S.1; Stephens, Britton B.1; Kinnison, Doug1; Morgan, Eric J.5; Keeling, Ralph F.5; Atlas, Elliot L.6; Schauffler, Sue M.1; Tilmes, Simone1; Kort, Eric A.2; Hoecker-Martinez, Martin S.3; Long, Matt C.1; Lamarque, Jean-Francois1; Saiz-Lopez, Alfonso1,4; McKain, Kathryn7,8; Sweeney, Colm8; Hills, Alan J.1; Apel, Eric C.1 | |
2019-11-22 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:22页码:14071-14090 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Spain |
英文摘要 | Fluxes of halogenated volatile organic compounds (VOCs) over the Southern Ocean remain poorly understood, and few atmospheric measurements exist to constrain modeled emissions of these compounds. We present observations of CHBr3, CH2Br2, CH3I, CHClBr2, CHBrCl2, and CH3Br during the O-2/N-2 Ratio and CO2 Airborne Southern Ocean (ORCAS) study and the second Atmospheric Tomography mission (ATom-2) in January and February of 2016 and 2017. Good model-measurement correlations were obtained between these observations and simulations from the Community Earth System Model (CESM) atmospheric component with chemistry (CAM-Chem) for CHBr3, CH2Br2, CH3I, and CHClBr2 but all showed significant differences in model : measurement ratios. The model : measurement comparison for CH3Br was satisfactory and for CHBrCl2 the low levels present precluded us from making a complete assessment. Thereafter, we demonstrate two novel approaches to estimate halogenated VOC fluxes; the first approach takes advantage of the robust relationships that were found between airborne observations of O-2 and CHBr3, CH2Br2, and CHClBr2. We use these linear regressions with O-2 and modeled O-2 distributions to infer a biological flux of halogenated VOCs. The second approach uses the Stochastic Time-Inverted Lagrangian Transport (STILT) particle dispersion model to explore the relationships between observed mixing ratios and the product of the upstream surface influence of sea ice, chl a, absorption due to detritus, and downward shortwave radiation at the surface, which in turn relate to various regional hypothesized sources of halogenated VOCs such as marine phytoplankton, phytoplankton in seaice brines, and decomposing organic matter in surface seawater. These relationships can help evaluate the likelihood of particular halogenated VOC sources and in the case of statistically significant correlations, such as was found for CH3I, may be used to derive an estimated flux field. Our results are consistent with a biogenic regional source of CHBr3 and both nonbiological and biological sources of CH3I over these regions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000498809000002 |
WOS关键词 | ATMOSPHERIC POTENTIAL OXYGEN ; METHYL-IODIDE ; ORGANIC-COMPOUNDS ; SEA-SALT ; CHEMISTRY ; BROMINE ; MODEL ; ATLANTIC ; AEROSOL ; ICE |
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/224073 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 2.Univ Michigan, Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA; 3.Univ Redlands, Phys Dept, Redlands, CA 92373 USA; 4.CSIC, Dept Atmospher Chem & Climate, Inst Phys Chem Rocasolano, Madrid, Spain; 5.Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103 USA; 6.Univ Miami, Dept Atmospher Sci, Miami, FL USA; 7.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 8.NOAA, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Asher, Elizabeth,Hornbrook, Rebecca S.,Stephens, Britton B.,et al. Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(22):14071-14090. |
APA | Asher, Elizabeth.,Hornbrook, Rebecca S..,Stephens, Britton B..,Kinnison, Doug.,Morgan, Eric J..,...&Apel, Eric C..(2019).Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(22),14071-14090. |
MLA | Asher, Elizabeth,et al."Novel approaches to improve estimates of short-lived halocarbon emissions during summer from the Southern Ocean using airborne observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.22(2019):14071-14090. |
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