海洋降水中无机离子浓度及湿沉降通量——中国海及西北太平洋降水的研究

发布时间：2018-07-07 19:29

  本文选题：降水 + 无机离子　； 参考：《中国环境科学》2017年05期

【摘要】：于2016年春夏季搭载航次采集了黄、东、南海及西北太平洋的海洋降水,用离子色谱法测定了其中的Cl~-、NO_3~-、SO_4~(2-)、PO_4~(3-)、Cl~-、NH_4~+、K~+、Mg~(2+)和Ca~(2+)离子浓度,并计算了其湿沉降通量及对海洋初级生产力的影响.结果表明,海洋降水样品主要受海洋影响,海盐离子浓度较高且不同海域主要离子类似;西北太平洋主要离子为Cl~-、Cl~-、SO_4~(2-)、Mg~(2+),黄海主要离子NO_3~-、SO_4~(2-)、Ca~(2+)、Cl~-,东海和南海主要离子均为Cl~-、Na~+、NO_3~-、SO_4~(2-).海洋降水中总离子浓度(mmol/L)的空间分布为西北太平洋(1.27)南海(0.53)东海(0.40)黄海(0.31).海洋降水中无机氮主要以硝态氮的形式存在,在气团由陆地向海洋传输的过程中,硝态氮在无机氮中的贡献也不断增加.Cl~-、NO_3~-、SO_4~(2-)、PO_4~(3-)、Na~+、NH_4~+、K~+、Mg~(2+)和Ca~(2+)的湿沉降通量[mg/(m~2·h)]范围分别是:3.47~451.43、0.60~49.36、1.13~124.02、0.0015~0.094、1.21~383.37、0.06~7.57、0.25~28.86、0.17~47.39和0.37~27.24.在靠近源区、降水量多的区域主要无机离子的湿沉降通量较高.估算结果显示,每小时降水所含氮磷可为各海域提供占初级生产力0.13‰~32.08%的新生产力.
[Abstract]:The precipitation in the Yellow, East, South China Sea and the Northwest Pacific Ocean was collected during the spring and summer of 2016, and the ion concentrations of Cl-No _ 3 ~ (-) -so _ 4 ~ (2-) ~ (2-) C ~ (4-) C ~ (4-) C ~ (4) C ~ (2) and Ca2 ~ (2) ions were determined by ion chromatography in the cities of Huanghuangdong, South China Sea and the Northwest Pacific Ocean. The wet deposition flux and its effect on marine primary productivity were calculated. The results show that the sea precipitation samples are mainly influenced by the ocean, the sea salt ion concentration is higher and the main ions in different sea areas are similar, the main ions in the Northwest Pacific Ocean are Cl-OCl-Cl-Cl-Na-Cl-NaNaNaNaSO4-SO4- (2-), the main ions of Huang Hai are NO3CO-SO4- SO4- (2-), and the main ions in the East China Sea and the South China Sea are Cl-Na-Na-Na-tia-3- so _ 4- (2-). The spatial distribution of total ion concentration (mmol / L) in ocean precipitation is as follows: northwest Pacific (1. 27) South China Sea (0. 53) and East China Sea (0. 40) Huang Hai (0. 31). 娴锋磱闄嶆按涓�鏃犳満姘�涓昏�佷互纭濇�佹爱鐨勫舰寮忓瓨鍦，

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