夏季东海生源硫的分布、通量及其对非海盐硫酸盐的贡献

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Abstract

The spatial distributions of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO) as well as their control factors were studied in the East China Sea during June 2012. The sea-to-air flux of DMS and its contribution to non-sea-salt sulfate (nss-SO₄^2-) in atmospheric sulphate aerosol were also estimated. The average concentrations of DMS, dissolved DMSP (DMSPd), particulate DMSP (DMSPp), dissolved DMSO (DMSOd) and particulate DMSO (DMSOp) in the surface seawater were (5.71±5.23), (5.94±3.68), (23.84±14.15), (9.14±10.52) and (11.01±5.81) nmol/L, respectively. Concentrations of DMS, DMSP and DMSOp formed high values center in the region of 28°N~29°N and 122°E~123.5°E and declined around this region diffusively, exhibiting similar distribution patterns to chlorophyll a (Chl-a). Concentrations of DMS, DMSPd, DMSPp and DMSOp were significantly correlated with the levels of Chl-a, suggesting that phytoplankton biomass might play an important role in controlling the production and distributions of biogenic sulfur compounds in the East China Sea. The sea-to-air fluxes of DMS in the study area varied from 0.93 to 101.02 μmol/(m²·d), with an average of (18.13±21.42) μmol/(m²·d). The contribution of biogenic nss-SO₄^2- to the total nss-SO₄^2- in the atmospheric aerosol was only 2.2%, indicating that anthropogenic emission was the major source of atmospheric sulfur over the East China Sea in summer.

Key words： dimethylsulfide dimethylsulfoniopropionate dimethylsulfoxide sea-to-air flux non-sea-salt sulfate East China Sea

Received: 15 April 2016

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X142

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	SUN Jing
	ZHANG Hong-hai
	ZHANG Sheng-hui
	GAO Nan
	YANG Gui-peng

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SUN Jing,ZHANG Hong-hai,ZHANG Sheng-hui等. Distribution and fluxes of biogenic sulfur in the East China Sea and its contribution to the non-sea-salt sulfate in atmospheric aerosol in summer[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(11): 3456-3464.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I11/3456

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