Numerical Study on the Effects of Atmospheric Deposition and River Input on Nutrients and Chlorophyll-a Concentration in the Bohai Sea and Yellow Sea
In this study,the seasonal variation of nutrients and Chlorophyll-a concentration in the Bo-hai Sea and Yellow Sea was simulated by a three-dimensional coupled ecosystem model,and the effects of atmospheric deposition and river input on the concentrations of DIN(dissolved inorganic nitrogen),DIP(dissolved inorganic phosphorus)and Chl-a were compared by sensitive numerical experiments.The results showed that atmospheric deposition could increase the surface DIN concentration by up to 14 mmol/m3,and its influence gradually decreased from the coast to the central area.The influence of river input was concentrated near the estuary,and could increase the surface DIN concentration by up to 90 mmol/m3.In the high flow period in summer,river input could increase the surface Chl-a concentration by 60％,while in other seasons,the effect of atmospheric deposition on Chl-a concentration was signifi-cantly greater than that of river input.The numerical experiments showed that with the increase of at-mospheric deposition flux,the concentrations of DIN and Chl-a increased,while the concentration of DIP changed little,which was related to the composition of atmospheric deposition and the N/P in the marine environment.This study suggests that although the reduction of river input is important for ma-rine environmental protection in coastal regions,the control of atmospheric deposition is also an impor-tant means to improve the quality of seawater.
atmospheric depositionriver inputthe Bohai Sea and Yellow SeaDINDIPChloro-phyll-a
万方数据
维普
