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, NO2- and SiO32- concentrations were relatively high in summer and autumn, while NO3- and PO43- 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 NO2--N, NO3--N, PO43--P and SiO32--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.
atmosphere wet depositionnutrienteutrophicationZhanjiang Bay
NETL
NSTL
万方数据
维普
