Seasonal and spatial variations in the partial pressure of carbon dioxide in a eutrophic brackish lake, Lake Hamana, Japan
Seasonal and spatial variations in the partial pressure of carbon dioxide in a eutrophic brackish lake, Lake Hamana, Japan
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日本滨名湖富营养化咸水湖二氧化碳分压的季节和空间变化
DOI：
10.1007/s10872-021-00621-6
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发表时间：
2021
影响因子：
2.3
通讯作者：
Suzuki Kei
中科院分区：
文献类型：
--
作者：
Kubo Atsushi;Yoshida Keisuke;Suzuki Kei
2017年10月至2019年9月，每月在14个站点调查了哈马纳湖表层半咸水沃茨的溶解无机碳和总碱度。表层海水中CO2分压（pCO 2）为29 ~ 1476 μatm，在观测期间，大气CO2不饱和，但由于大量陆源有机碳和无机碳的输入，大部分沿海沃茨为净源区。由于pCO 2与溶解氧之间存在较强的负相关性，pCO 2的季节和时间变化主要来自浮游植物的活动。低碳高氮的污水处理厂出水引起浮游植物的高活性。因此，在具有污水处理厂的城市化沿海沃茨，如日本的沿海沃茨，有可能从较弱的二氧化碳源区转移到汇区。然而，pCO 2过饱和的污染河口，特别是在高降水事件后，由于大量的碳供应。
The dissolved inorganic carbon and total alkalinity in the surface brackish waters of Lake Hamana were investigated monthly from October 2017 to September 2019 at 14 stations. The partial pressure of carbon dioxide (pCO2) in the surface water ranged from 29 to 1476 μatm and was undersaturated for atmospheric CO2during the observation periods, although most coastal waters were net source areas because of the large amount of terrestrial organic and inorganic carbon input. Since there was a strong negative correlation between pCO2and the dissolved oxygen, seasonal and temporal variations in pCO2were mainly derived from phytoplankton activity. The high phytoplankton activity induced by the effluents from sewage treatment plants, which was low in carbon and high in nitrogen. Therefore, in urbanized coastal waters with sewage treatment plants, such as the coastal waters of Japan, there is a possibility of shifting from weaker carbon dioxide source areas to sink areas. However, pCO2was oversaturated at the polluted river mouth, especially after high precipitation events due to the large carbon supply.