Impacts of urban carbon dioxide emissions on sea-air flux and ocean acidification in nearshore waters
Impacts of urban carbon dioxide emissions on sea-air flux and ocean acidification in nearshore waters
复制标题
城市二氧化碳排放对近岸海域海气通量和海洋酸化的影响
DOI：
10.1371/journal.pone.0214403
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发表时间：
2019
期刊：
影响因子：
3.7
通讯作者：
F. Chavez
中科院分区：
文献类型：
--
作者：
Devon Northcott;J. Sevadjian;Diego A. Sancho;Christopher Wahl;J. Friederich;F. Chavez
在美国加利福尼亚州蒙特利湾沿海传感器平台的离岸风期间，观察到相对于充分混合的海洋空气，大气中二氧化碳（CO2）水平大大提高。最高浓度来自城市和农业地区，由昼间风驱动，并在清晨达到峰值。这些增强的大气水平可以在约 100 公里宽的近岸区域检测到，并且代表着海洋二氧化碳吸收总量的显着增加。据全球估计，由于大气中二氧化碳浓度大大提高，海气中二氧化碳通量增加了 2500 万吨，约占海洋每年吸收二氧化碳的 1%。 100 公里沿海地带的吸收量增加了 20%，表明对生产性沿海水域的海洋酸化有潜在的巨大影响。
Greatly enhanced atmospheric carbon dioxide (CO2) levels relative to well-mixed marine air are observed during periods of offshore winds at coastal sensor platforms in Monterey Bay, California, USA. The highest concentrations originate from urban and agricultural areas, are driven by diurnal winds, and peak in the early morning. These enhanced atmospheric levels can be detected across a ~100km wide nearshore area and represent a significant addition to total oceanic CO2 uptake. A global estimate puts the added sea-air flux of CO2 from these greatly enhanced atmospheric CO2 levels at 25 million tonnes, roughly 1% of the ocean’s annual CO2 uptake. The increased uptake over the 100 km coastal swath is of order 20%, indicating a potentially large impact on ocean acidification in productive coastal waters.