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《China Environmental Science》 2013-07
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Nutrients of atmospheric wet deposition from the Qianliyan Island of the Yellow Sea

HAN Li-jun1, ZHU Yu-mei1, LIU Su-mei1*, ZHANG Jing2, LI Rui-huan1 (1.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;2.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China)  
Rainwater samples were collected at the Qianliyan Island of the Yellow Sea for the period of 2009-2010 and analysed for pH and nutrient concentrations(i.e.NH4+,NO3-+ NO2-,SiO32-and PO43-).The results showed that the pH values in 58% samples ranged from 5.6 to 7.0,dominated by neutral depositions.Concentrations of nutrients had seasonal variations,higher in spring and winter but relatively low in summer and autumn.Based on comparison of inorganic nitrogen concentrations in rainwater at different regions,the air-mass back-trajectory and annual variations,atmospheric wet depositions over the Yellow Sea were affected by the anthropogenic emissions as well as sand-dust storms.Furthermore,the historical overview of existing data indicated that atmospheric dry and wet depositions of NH4+-N,DI(NO3-+ NO2-),SiO32--Si and PO43--P account for 87%,47%,3% and 53%,respectively,of total terrestrial(i.e.atmospheric depositions and riverine influx) input.Rainfall in this region can dramatically increase surface water nutrient level that enhance the primary productivity.
【Fund】: 国家“973”项目(2011CB409802);; 国家自然科学基金资助项目(40925017 41221004)
【CateGory Index】: X55;X13
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