Atmospheric methane and carbon dioxide concentrations measured during ALKOR cruise AL561 on 2021-08-05@en

Atmospheric gas concentrations of CH4 and CO2 were measured with Picarro G2301-f analyser during AL561 cruise onboard RV Alkor (02.-12.08.2021). The gas inlet was placed at the bow of RV Alkor, at 6 m above sea level, to identify natural and anthropogenic methane anomalies near the sea surface (Schmidt et al., 2021). Concentration data are correlated with GPS-position and weather data (DSHIP) using time stamps (UTC); calculated in 1-3s averages.2021年8月2日至12日，在阿尔科号（RV Alkor）科考船执行AL561航次期间，使用Picarro G2301-f型分析仪对大气中甲烷（CH4）和二氧化碳（CO2）的浓度进行了测定。为识别海面附近的自然与人为成因甲烷异常，该分析仪的气体进气口被安装于阿尔科号船首，高度为海平面以上6米（Schmidt等，2021）。浓度数据通过UTC时间戳与GPS位置信息及DSHIP气象数据进行关联，并以1至3秒为窗口完成平均计算。