OJEong Resilience Institute, Korea University, Seoul 02841, Republic of Korea.
Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
Mar Pollut Bull. 2024 Apr;201:116262. doi: 10.1016/j.marpolbul.2024.116262. Epub 2024 Mar 20.
This study investigated the carbonate system and air-sea CO exchange in the inshore waters along South Korea's western coastline in 2020. Overlooking these waters might introduce significant errors in estimating air-sea CO fluxes of the southeastern Yellow Sea, given their interaction with land, offshore regions, and sediments. During periods other than summer, seasonal variations in seawater CO partial pressure (pCO) could be generally explained by thermal effects. Tidal mixing and shallow depths resulted in weaker stratification-induced carbon export compared to offshore regions. However, during summer, inshore waters exhibited high spatial variability in pCO, ranging from approximately 185 to 1000 μatm. In contrast to offshore waters that modestly absorbed CO, inshore waters shallower than 20 m emitted ∼100 Gg C yr to the atmosphere. However, considering the high heterogeneity of the study area, additional observations with high spatial and temporal resolution are required to refine estimates of air-sea CO exchange.
本研究调查了 2020 年韩国西部沿海近岸水域的碳酸盐体系和海-气 CO 交换。鉴于这些水域与陆地、近海区域和沉积物相互作用，忽略它们可能会导致对东南黄海海-气 CO 通量的估算产生重大误差。在夏季以外的其他时期，海水 CO2 分压（pCO2）的季节性变化通常可以用热效应来解释。潮汐混合和较浅的水深导致与近海区域相比，分层引起的碳输出较弱。然而，在夏季，近岸水域的 pCO2 空间变异性很大，范围约为 185 至 1000 μatm。与适度吸收 CO2 的近海水域相比，水深小于 20 m 的近岸水域向大气排放约 100 Gg C yr。然而，考虑到研究区域的高度异质性，需要进行更多具有高时空分辨率的观测，以完善对海-气 CO 交换的估算。
