Atmospheric iron deposition in the northwestern Pacific Ocean and its adjacent marginal seas: The importance of coal burning

被引:24
|
作者
Lin, Yi-Chiu [1 ]
Chen, Jen-Ping [1 ]
Ho, Tung-Yuan [2 ]
Tsai, I-Chun [1 ]
机构
[1] Natl Taiwan Univ, Dept Atmospher Sci, Taipei 10764, Taiwan
[2] Acad Sinica, Res Ctr Environm Changes, Taipei 115, Taiwan
关键词
SOUTH CHINA SEA; FIRED POWER-PLANTS; MODEL AEROSOL COMPONENT; LONG-RANGE TRANSPORT; TRACE-ELEMENTS; CHEMICAL-COMPOSITION; SIZE DISTRIBUTION; FLY-ASH; PARTICULATE MATTER; METAL COMPOSITION;
D O I
10.1002/2013GB004795
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study applied a regional air quality model, incorporated with an emission module, to quantitatively differentiate the atmospheric iron sources originating from lithogenic dusts or coal-burning fly ashes deposited in the Northwestern Pacific Ocean and its marginal seas. Particular attention was paid to the high iron content of fly ashes emitted from steel and iron plants burning coals. Using the year 2007 as an example, the modeling results exhibit large seasonal variations in iron deposition, with highest deposition fluxes occurred during spring and autumn, which are comparable to the seasonal fluctuation of chlorophyll a concentrations estimated by satellite images in the oceanic regions. Fly ash from coal burning accounted for 7.2% of the total iron deposited over the northwestern Pacific Ocean and 15% of that over the northern South China Sea. After considering the difference of iron solubility in the aerosols, anthropogenic aerosol associated with coal burning would be the major bioavailable iron source in the surface water of the oceanic regions.
引用
收藏
页码:138 / 159
页数:22
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