Atmospheric deposition of inorganic nitrogen to the eastern China seas and its implications to marine biogeochemistry
Atmospheric deposition of inorganic nitrogen to the eastern China seas and its implications to marine biogeochemistry
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DOI：
10.1029/2009jd012814
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发表时间：
2010-04
影响因子：
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通讯作者：
Yan Zhang;Qi Yu;Weichun Ma;Limin Chen
中科院分区：
文献类型：
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作者：
Yan Zhang;Qi Yu;Weichun Ma;Limin Chen
通量分别为0.05-0.5和0.2-0.6 g m-2 yr-1，湿沉降占总量的79%。中国东海无机氮的总沉降量为498 GgN yr-1，占中国氮排放量的3.4%。NO3和NH 4的沉积占主导地位。模型结果与现场实测结果吻合较好。NH 4和NH3在东海的沉降量高达166 GgN yr-1，这几乎等于来自大陆的184 GgN yr-1的总输入量，包括河流排放、工业废水和生活废水。大气沉降的铵可占总输入量的56%，是主要河流输入东海的1.1-1.5倍。黄海的氨氮沉降量占总输入量的87%。年总氮沉降量可转换为100-200 mmol C m −2 yr −1的新初级生物生产力，相当于东海新生产力的1.1-3.9%。研究结果表明，大气沉降对整个东海的生物生产力有重要影响。
fluxes are 0.05–0.5 and 0.2–0.6 g m −2 yr −1 , respectively, with the wet deposition accounting for 79% of the total. The total deposition of inorganic nitrogen species, including NO3 ,N H4 , HNO3 ,N Ox, and NH3, to the eastern China seas is 498 GgN yr −1 and accounts for 3.4% of the nitrogen emission by China. Deposition of NO3 and NH4 dominates. The model results agree well with available in situ measurements. The deposition of NH4 and NH3 to the East China Sea is up to 166 GgN yr −1 , which nearly equals the total input of 184 GgN yr −1 from the mainland, including riverine discharge, industrial wastewater, and domestic wastewater. Deposition of atmospheric ammonium can account for 56% of the external total input, which is 1.1–1.5 times the input from the major rivers to all the eastern China seas. Ammonium deposition to the Yellow Sea accounts for as much as 87% of the total input. The annual total nitrogen deposition can be converted to new primary biological productivity of 100–200 mmol C m −2 yr −1 ,o r 1.1–3.9% of the new productivity in the East China Sea. Our results suggest that atmospheric deposition has important impact on biological productivity in all the eastern China seas.