Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-10825-2018 |
Oxidation processes in the eastern Mediterranean atmosphere: evidence from the modelling of HOx measurements over Cyprus | |
Mallik, Chinmay1; Tomsche, Laura1; Bourtsoukidis, Efstratios1; Crowley, John N.1; Derstroff, Bettina1; Fischer, Horst1; Hafermann, Sascha1; Hueser, Imke1; Javed, Umar1; Kessel, Stephan1; Lelieveld, Jos1,2; Martinez, Monica1; Meusel, Hannah3; Novelli, Anna4; Phillips, Gavin J.5; Pozzer, Andrea1; Reiffs, Andreas1; Sander, Rolf1; Taraborrelli, Domenico4; Sauvage, Carina1; Schuladen, Jan1; Su, Hang3; Williams, Jonathan1,2; Harder, Hartwig1 | |
2018-07-31 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:14页码:10825-10847 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Cyprus; England |
英文摘要 | The Mediterranean is a climatically sensitive region located at the crossroads of air masses from three continents: Europe, Africa, and Asia. The chemical processing of air masses over this region has implications not only for the air quality but also for the long-range transport of air pollution. To obtain a comprehensive understanding of oxidation processes over the Mediterranean, atmospheric concentrations of the hydroxyl radical (OH) and the hydroperoxyl radical (HO2) were measured during an intensive field campaign (CYprus PHotochemistry EXperiment, CYPHEX-2014) in the northwest of Cyprus in the summer of 2014. Very low local anthropogenic and biogenic emissions around the measurement location provided a vantage point to study the contrasts in atmospheric oxidation pathways under highly processed marine air masses and those influenced by relatively fresh emissions from mainland Europe. The CYPHEX measurements were used to evaluate OH and HO2 simulations using a photochemical box model (CAABA/MECCA) constrained with CYPHEX observations of O-3, CO, NOx, hydrocarbons, peroxides, and other major HOx (OH + HO2) sources and sinks in a low-NO + environment (< 100 pptv of NO). The model simulations for OH agreed to within 10% with in situ OH observations. Model simulations for HO2 agreed to within 17% of the in situ observations. However, the model strongly under-predicted HO2 at high terpene concentrations, this under-prediction reaching up to 38% at the highest terpene levels. Different schemes to improve the agreement between observed and modelled HO2, including changing the rate coefficients for the reactions of terpene-generated peroxy radicals (RO2) with NO and HO2 as well as the autoxidation of terpene-generated RO2 species, are explored in this work. The main source of OH in Cyprus was its primary production from O-3 photolysis during the day and HONO photolysis during early morning. Recycling contributed about one-third of the total OH production, and the maximum recycling efficiency was about 0.7. CO, which was the largest OH sink, was also the largest HO2 source. The lowest HOx production and losses occurred when the air masses had higher residence time over the oceans. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440515900001 |
WOS关键词 | LASER-INDUCED FLUORESCENCE ; VOLATILE ORGANIC-COMPOUNDS ; OH-INITIATED OXIDATION ; OZONE PRODUCTION-RATES ; IN-SITU MEASUREMENTS ; ISOPRENE OXIDATION ; BOUNDARY-LAYER ; TECHNICAL NOTE ; ALPHA-PINENE ; HYDROXYL RADICALS |
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/19436 |
专题 | 地球科学 |
作者单位 | 1.Max Planck Inst Chem, Atmospher Chem Dept, D-55128 Mainz, Germany; 2.Cyprus Inst, Energy Environm & Water Res Ctr, CY-1645 Nicosia, Cyprus; 3.Max Planck Inst Chem, Multiphase Chem Dept, D-55128 Mainz, Germany; 4.Forschungszentrum Julich, Inst Energy & Climate Res, D-52425 Julich, Germany; 5.Univ Chester, Dept Nat Sci, Chester CH1 4BJ, Cheshire, England |
推荐引用方式 GB/T 7714 | Mallik, Chinmay,Tomsche, Laura,Bourtsoukidis, Efstratios,et al. Oxidation processes in the eastern Mediterranean atmosphere: evidence from the modelling of HOx measurements over Cyprus[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(14):10825-10847. |
APA | Mallik, Chinmay.,Tomsche, Laura.,Bourtsoukidis, Efstratios.,Crowley, John N..,Derstroff, Bettina.,...&Harder, Hartwig.(2018).Oxidation processes in the eastern Mediterranean atmosphere: evidence from the modelling of HOx measurements over Cyprus.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(14),10825-10847. |
MLA | Mallik, Chinmay,et al."Oxidation processes in the eastern Mediterranean atmosphere: evidence from the modelling of HOx measurements over Cyprus".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.14(2018):10825-10847. |
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