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Nutrients

机译:营养素

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emissions to the marine nitrogen inventory-A case study for the western Baltic Sea D. Neumann, M. Karl, H. Radtke et al. Ocean Science 2020 16/1 (pp 115-134) Leibniz- Institute for Baltic Sea Research Warnemunde, Seestr. 15, Rostock, 18119, Germany The western Baltic Sea is impacted by various anthropogenic activities and stressed by high riverine and atmospheric nutrient loads. Atmospheric deposition accounts for up to a third of the nitrogen input into the Baltic Sea and contributes to eutrophica-tion. Amongst other emission sources, the shipping sector is a relevant contributor to the atmospheric concentrations of nitrogen oxides (NOX) in marine regions. Thus, it also contributes to atmospheric deposition of bioavailable oxidized nitrogen into the Baltic Sea. In this study, the contribution of shipping emissions to the nitrogen budget in the western Baltic Sea is evaluated with the coupled three-dimensional physical biogeochemical model MOM-ERGOM (Modular Ocean Model-Ecological ReGional Ocean Model) in order to assess the relevance of shipping emissions for eutrophication. The atmospheric input of bioavailable nitrogen impacts eutrophication differently depending on the time and place of input. The shipping sector contributes up to 5% to the total nitrogen concentrations in the water. The impact of shipping-related nitrogen is highest in the offshore regions distant from the coast in early summer, but its contribution is considerably reduced during blooms of cyanobacteria in late summer because the cyanobacteria fix molecular nitrogen. Although absolute shipping-related total nitrogen concentrations are high in some coastal regions, the relative contribution of the shipping sector is low in the vicinity of the coast because of high riverine nutrient loads.
机译:D. Neumann,M。Karl,H。Radtke等人在波罗的海西部的案例研究。海洋科学2020 16/1(pp 115-134)莱布尼兹-波罗的海研究所,瓦尔内明德,Seestr。 15,罗斯托克,18119,德国西波罗的海受到各种人类活动的影响,并受到河流和大气中高养分负荷的压力。大气沉积占波罗的海输入氮的三分之一,并促进了富营养化。在其他排放源中,航运部门是海洋区域大气中氮氧化物(NOX)浓度的重要贡献者。因此,这也有助于大气中可生物利用的氧化氮向波罗的海的沉积。在这项研究中,结合三维物理生物地球化学模型MOM-ERGOM(模块化海洋模型-生态区域海洋模型),评估了波罗的海西部船舶排放物对氮预算的贡献,以评估运输的相关性富营养化的排放。大气中生物利用氮的输入对富营养化的影响取决于输入的时间和地点。航运部门贡献了水中总氮浓度的5%。与运输有关的氮的影响在初夏远离海岸的近海地区影响最大,但在夏末的蓝细菌开花期间,其影响被大大降低,因为蓝细菌固定了分子氮。尽管在某些沿海地区,与运输相关的总氮的绝对浓度较高,但由于河流中的养分含量高,在沿海地区,运输部门的相对贡献较低。

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    《Oceanographic Literature Review》 |2020年第3期|507-508|共2页
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