Tropical Marine Science Institute, National University of Singapore, Singapore 119223, Republic of Singapore.
Water Sci Technol. 2010;61(4):859-67. doi: 10.2166/wst.2010.357.
Atmospheric deposition is an important source of nutrients to the ocean, potentially stimulating primary production, but its relative effect on coastal eutrophication remains largely unknown. This paper presents data generated by the 3-D modelling program NEUTRO to assess the proportion of atmospheric nutrient fluxes, allowing a quantification of the relative contribution of atmospheric and ocean fluxes in the Singapore Strait. This work included an assessment of the importance of high concentration episodic inputs of nitrate-nitrogen associated with transport of polluted air onto the surface water. The NEUTRO model features a nutrient-fuelled food web composed of nutrients, plankton, and dissolved oxygen dynamics. Model simulations show that atmospheric deposition fluxes alone might contribute nitrate-nitrogen mass up to 15% into the Singapore Strait. This amount might be a significant contributor toward regional eutrophication when the system is under nutrient-depleted conditions. Model calibrations for temporal and spatial variability of nutrients qualitatively and quantitatively agreed with available measurements.
大气沉降是海洋营养物质的重要来源，可能刺激初级生产力，但它对沿海富营养化的相对影响在很大程度上仍不清楚。本文介绍了由三维模型程序 NEUTRO 生成的数据，以评估大气营养物质通量的比例，从而定量分析大气和海洋通量在新加坡海峡中的相对贡献。这项工作包括评估与受污染空气输送到地表水有关的硝酸盐氮高浓度爆发式输入的重要性。NEUTRO 模型具有一个由营养物质、浮游生物和溶解氧动态组成的营养驱动的食物网。模型模拟表明，仅大气沉降通量就可能将硝酸盐氮质量贡献高达 15%到新加坡海峡中。当系统处于营养物质匮乏的情况下，这个数量可能是导致区域富营养化的一个重要因素。对营养物质的时间和空间变异性进行的模型校准在定性和定量上都与现有测量结果一致。
