气候变化领域集成服务门户(CCPortal): Measurements of carbonyl compounds around the Arabian Peninsula: Overview and model comparison

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DOI	10.5194/acp-20-10807-2020
	Measurements of carbonyl compounds around the Arabian Peninsula: Overview and model comparison
	Wang N.; Edtbauer A.; Stönner C.; Pozzer A.; Bourtsoukidis E.; Ernle L.; Dienhart D.; Hottmann B.; Fischer H.; Schuladen J.; N. Crowley J.; Daniel J.; Lelieveld J.; Williams J.
发表日期	2020
ISSN	1680-7316
起始页码	10807
结束页码	10829
卷号	20 期号:18
英文摘要	Volatile organic compounds (VOCs) were measured around the Arabian Peninsula using a research vessel during the AQABA campaign (Air Quality and Climate Change in the Arabian Basin) from June to August 2017. In this study we examine carbonyl compounds, measured by a proton transfer reaction mass spectrometer (PTR-ToF-MS), and present both a regional concentration distribution and a budget assessment for these key atmospheric species. Among the aliphatic carbonyls, acetone had the highest mixing ratios in most of the regions traversed, varying from 0.43 ppb over the Arabian Sea to 4.5 ppb over the Arabian Gulf, followed by formaldehyde (measured by a Hantzsch monitor, 0.82 ppb over the Arabian Sea and 3.8 ppb over the Arabian Gulf) and acetaldehyde (0.13 ppb over the Arabian Sea and 1.7 ppb over the Arabian Gulf). Unsaturated carbonyls (C4-C9) varied from 10 to 700 ppt during the campaign and followed similar regional mixing ratio dependence to aliphatic carbonyls, which were identified as oxidation products of cycloalkanes over polluted areas. We compared the measurements of acetaldehyde, acetone, and methyl ethyl ketone to global chemistry-transport model (ECHAM5/MESSy Atmospheric Chemistry-EMAC) results. A significant discrepancy was found for acetaldehyde, with the model underestimating the measured acetaldehyde mixing ratio by up to an order of magnitude. Implementing a photolytically driven marine source of acetaldehyde significantly improved the agreement between measurements and model, particularly over the remote regions (e.g. Arabian Sea). However, the newly introduced acetaldehyde source was still insufficient to describe the observations over the most polluted regions (Arabian Gulf and Suez), where model underestimation of primary emissions and biomass burning events are possible reasons. © 2020 Author(s).
语种	英语
scopus关键词	atmospheric chemistry; biomass burning; comparative study; mass spectrometry; research work; vessel; volatile organic compound; Arabian Peninsula; Varanidae
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247519
作者单位	Air Chemistry Department, Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1, Mainz, 55128, Germany; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Energy Environment and Water Research Center, Cyprus Institute, Nicosia, Cyprus
推荐引用方式 GB/T 7714	Wang N.,Edtbauer A.,Stönner C.,et al. Measurements of carbonyl compounds around the Arabian Peninsula: Overview and model comparison[J],2020,20(18).
APA	Wang N..,Edtbauer A..,Stönner C..,Pozzer A..,Bourtsoukidis E..,...&Williams J..(2020).Measurements of carbonyl compounds around the Arabian Peninsula: Overview and model comparison.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(18).
MLA	Wang N.,et al."Measurements of carbonyl compounds around the Arabian Peninsula: Overview and model comparison".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.18(2020).