A controlled CO₂ release experiment was carried out in order to mimic unintended leakage of geologically stored CO₂, and to study methods for detecting these leak events. The experiment was carried out at 60 m depth in the Oslo Fjord over the course of one month. During the simulated leak events, the water chemistry was monitored by sensors mounted on stationary templates located 10 and 22 m horizontally from the source, as well as sensors mounted on an Autonomous Underwater Vehicle (AUV). During baseline conditions (no CO₂ release), we observe a strong biogenic correlation between O₂ and CO₂. This correlation is lacking during CO₂ releases, indicating that the CO₂-O₂ correlation can be used as a marker for CO₂ leakage. The same deviations were not initially detected by the CO₂ sensor mounted on the AUV due to the longer response time of membrane-based CO₂ sensors. However, by applying response time correction in the post-processing of the AUV CO₂ data, the generated CO₂ plume was detected. Moreover, the plume was clearly detected by the AUV using the faster responding pH sensors, where the correlation with O₂ again could be used to confirm the anomaly.

为了模拟地质存储的CO _2的意外泄漏，并研究检测这些泄漏事件的方法，进行了受控的CO ₂释放实验。该实验在一个月的时间里于奥斯陆峡湾的60 m深度进行。在模拟泄漏事件期间，通过安装在距水源水平10和22 m的固定模板上的传感器以及安装在自动水下航行器（AUV）上的传感器对水化学进行监测。在基线条件下（无CO ₂释放），我们观察到O ₂和CO ₂之间存在很强的生物相关性。在CO ₂释放期间缺乏这种相关性，表明CO ₂-O ₂相关性可以用作CO ₂泄漏的标记。由于基于膜的CO ₂传感器的响应时间较长，最初安装在AUV上的CO ₂传感器未检测到相同的偏差。但是，通过在AUV CO ₂数据的后处理中应用响应时间校正，可以检测到生成的CO ₂羽流。此外，AUV使用响应速度更快的pH传感器可以清楚地检测出羽流，其中与O ₂的相关性可再次用于确认异常。