Measurement of Air-Sea Exchange of Dimethyl Sulfide and Acetone by PTR-MS Coupled with Gradient Flux Technique

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• 作者：Hiroshi Tanimoto ; Sohiko Kameyama ; Toru Iwata ; Satoshi Inomata ; Yuko Omori
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：January 7, 2014
• 年：2014
• 卷：48
• 期：1
• 页码：526-533
• 全文大小：518K
• ISSN：1520-5851

文摘

We developed a new method for in situ measurement of air鈥搒ea fluxes of multiple volatile organic compounds (VOCs) by combining proton transfer reaction-mass spectrometry (PTR-MS) and gradient flux (GF) technique. The PTR-MS/GF system was first deployed to determine the air鈥搒ea flux of VOCs in the open ocean of the western Pacific, in addition to carbon dioxide and water vapor. Each profiling at seven heights from the ocean surface up to 14 m took 7 min. In total, 34 vertical profiles of VOCs in the marine atmosphere just above the ocean surface were obtained. The vertical gradient observed was significant for dimethyl sulfide (DMS) and acetone with the best-fit curves on quasi-logarithmic relationship. The mean fluxes of DMS and acetone were 5.5 卤 1.5 and 2.7 卤 1.3 渭mol/m²/day, respectively. These fluxes are in general in accordance with those reported by previous expeditions.