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>Seasonal Response of North Western Pacific Marine Ecosystems to Deposition of Atmospheric Inorganic Nitrogen Compounds from East Asia
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Seasonal Response of North Western Pacific Marine Ecosystems to Deposition of Atmospheric Inorganic Nitrogen Compounds from East Asia
The contribution of the atmospheric deposition of inorganic nitrogen compounds produced in East Asia to the marine ecosystems of the North Western Pacific Ocean (NWPO) was investigated in this study using a 3-D lower trophic-marine ecosystem model (NEMURO) combined with an atmospheric regional chemical transport model (WRF-CMAQ). The monthly mean values for the wet and dry deposition of nitrogen compounds, including gases (HNO3 and NH3) and aerosol particles (NO3− and NH4+), were determined using the WRF-CMAQ for the NWPO from 2009–2016. These values were input into the NEMURO as an additional nitrogen source. The NEMURO indicated that the annual average chlorophyll mass concentration at the surface in the subtropical region (20°N–30°N; 125°E–150°E) of the NWPO increased from 0.04 to 0.10 mg/m3. Similarly, the gross primary productivity, integrated over sea depths of 0–200 m, increased from 85 to 147 mg C/m2/day because of this deposition. This study indicates that the supply of atmospheric inorganic nitrogen compounds from East Asia to the NWPO could have a high nutrient impact on the marine ecosystem in the subtropical region.
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机译:在这项研究中,结合3-D低层营养性海洋生态系统模型(NEMURO),研究了东亚地区产生的无机氮化合物在大气中的沉积对西北太平洋海洋生态系统(NWPO)的贡献区域化学品运输模型(WRF-CMAQ)。使用以下方法确定湿气和干气中含氮化合物(包括气体(HNO3和NH3)和气溶胶颗粒(NO3 - sup>和NH4 + sup>))的月平均值。 2009年至2016年的NWPO WRF-CMAQ。这些值作为附加氮源输入到NEMURO中。 NEMURO表示,NWPO亚热带地区(20°N–30°N; 125°E–150°E)地表的年平均叶绿素质量浓度从0.04增加到0.10 mg / m 3 < / sup>。同样,由于这种沉积,在0-200 m的海深处综合的总初级生产力从85增加到147 mg C / m 2 sup> /天。这项研究表明,从东亚向NWPO供给大气无机氮化合物可能会对亚热带地区的海洋生态系统产生较高的养分影响。
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