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《China Environmental Science》 2017-06
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Nutrients in atmospheric wet deposition in the Zhanjiang Bay

CHEN Fa-jin;CHEN Chun-qing;ZHOU Feng-xia;LAO Qi-bin;ZHU Qing-mei;ZHANG Shu-wen;Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction Technologies, Guangdong Ocean University;  
The nutrients in atmospheric wet deposition in the Zhanjiang Bay and their impacts on the marine ecosystems were studied based on the rainwater investigation from May 2015 to April 2016. The results showed that the rainfall during the year of investigation was significantly higher than the average annual rainfall due to the influence of El Nino. In rainwater, NO_2~-and SiO_3~(2-)concentrations were relatively high in summer and autumn, while NO_3~- and PO_4~(3-)concentrations were relatively high in spring and winter. The deposition fluxes of these nutrients were all highest in autumn, with a high average contribution(larger than 50%) to the wet deposition fluxes in a whole year. These seasonal variations were affected by rainfall, different sources of air masses, local human activities. A super typhoon passing by in autumn, which brought heavy rains, contributed much to the highest deposition fluxes of nutrients in autumn. The wet deposition could bring 2.04, 292.4, 8.13 and 45.8t/a of NO_2~--N, NO_3~--N, PO_4~(3-)-P and SiO_3~(2-)-Si into the Zhanjiang Bay. Their deposition in autumn might cause phytoplankton to increase in seawater in short period, while in other seasons this phenomenon might be absent.
【Fund】: 国家自然科学基金资助项目(41476066 41476010);; 广东省自然科学基金资助项目(2016A030312004);; 广东省高等学校优秀青年教师培养计划项目(Yq2014004);; 广东海洋大学创新强校项目(GDOU2014050201);广东海洋大学校选项目(1312437)
【CateGory Index】: X51
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