Measurement of air-sea exchange of dimethyl sulfide and acetone by PTR-MS coupled with gradient flux technique.
Environ Sci Technol
; 48(1): 526-33, 2014.
Article
en En
| MEDLINE
| ID: mdl-24219807
ABSTRACT
We developed a new method for in situ measurement of air-sea 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-sea 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 ± 1.5 and 2.7 ± 1.3 µmol/m(2)/day, respectively. These fluxes are in general in accordance with those reported by previous expeditions.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Acetona
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Agua de Mar
/
Sulfuros
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Contaminantes Químicos del Agua
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Monitoreo del Ambiente
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Contaminantes Atmosféricos
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Compuestos Orgánicos Volátiles
Idioma:
En
Revista:
Environ Sci Technol
Año:
2014
Tipo del documento:
Article
País de afiliación:
Japón