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DOI | 10.5194/acp-20-6081-2020 |
A new marine biogenic emission: Methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea | |
Edtbauer A.; Stönner C.; Pfannerstill E.Y.; Berasategui M.; Walter D.; Crowley J.N.; Lelieveld J.; Williams J. | |
发表日期 | 2020 |
ISSN | 16807316 |
起始页码 | 6081 |
结束页码 | 6094 |
卷号 | 20期号:10 |
英文摘要 | We present the first ambient measurements of a new marine emission methane sulfonamide (MSAM: CH5NS), along with dimethyl sulfide (DMS) and dimethyl sulfone (DMSO2) over the Arabian Sea. Two shipborne transects (W→E, E→W) were made during the AQABA (Air Quality and Climate Change in the Arabian Basin) measurement campaign. Molar mixing ratios in picomole of species per mole of air (throughout this paper abbreviated as ppt) of DMS were in the range of 300-500 ppt during the first traverse of the Arabian Sea (first leg) and 100-300 ppt on the second leg. On the first leg DMSO2 was always below 40 ppt and MSAM was close to the limit of detection. During the second leg DMSO2 was between 40 and 120 ppt and MSAM was mostly in the range of 20-50 ppt with maximum values of 60 ppt. An analysis of HYSPLIT back trajectories combined with calculations of the exposure of these trajectories to underlying chlorophyll in the surface water revealed that most MSAM originates from the Somalia upwelling region, known for its high biological activity. MSAM emissions can be as high as one-third of DMS emissions over the upwelling region. This new marine emission is of particular interest as it contains both sulfur and nitrogen, making it potentially relevant to marine nutrient cycling and marine atmospheric particle formation. © Author(s) 2020. |
关键词 | atmospheric chemistrybiogenic emissionchlorophylldimethylsulfidemethanemixing rationitrogennutrient cyclingsulfurArabian SeaIndian Ocean |
语种 | 英语 |
来源机构 | Atmospheric Chemistry and Physics |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/132017 |
推荐引用方式 GB/T 7714 | Edtbauer A.,Stönner C.,Pfannerstill E.Y.,et al. A new marine biogenic emission: Methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea[J]. Atmospheric Chemistry and Physics,2020,20(10). |
APA | Edtbauer A..,Stönner C..,Pfannerstill E.Y..,Berasategui M..,Walter D..,...&Williams J..(2020).A new marine biogenic emission: Methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea.,20(10). |
MLA | Edtbauer A.,et al."A new marine biogenic emission: Methane sulfonamide (MSAM), dimethyl sulfide (DMS), and dimethyl sulfone (DMSO2) measured in air over the Arabian Sea".20.10(2020). |
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