Measurement of pCO₂ in highly dynamic coastal zones such as the southern Baltic Sea presents many challenges. In this study, we designed a system to measure pCO₂ and then validated it in a series of laboratory and seagoing tests. The fast response time of the system was shown to provide a better resolution of CO₂ system gradients. In the open waters of the Baltic Sea, the accuracy of the pCO₂ measurements (±1.3 µatm) met the requirements of the ICOS (±2.0 µatm). In the coastal zone, there was less consistency between pCO₂, DIC and pH measurements, suggesting the need to redefine the quality assurance and control requirements for the measurement of pCO₂ in dynamic regions.

在高度动态的沿海地区（例如波罗的海南部）对pCO _2的测量提出了许多挑战。在这项研究中，我们设计了一种测量pCO ₂的系统，然后在一系列的实验室测试和航海测试中对其进行了验证。系统的快速响应时间显示可提供更好的CO ₂系统梯度分辨率。在波罗的海的公海中，pCO _2的测量精度（±1.3 µatm）满足了ICOS的要求（±2.0 µatm）。在沿海地区，pCO ₂，DIC和pH测量之间的一致性较低，这表明需要重新定义动态区域中pCO ₂测量的质量保证和控制要求。