Fig. 1
From: Year-round trace gas measurements in the central Arctic during the MOSAiC expedition
Experimental workflow. Trace gas ambient air measurements discussed in this paper were performed on sea ice, from a 10 m tower at Met City, and on-board Polarstern in three different sea-container laboratories, referred to as the Atmospheric Radiation Measurement (ARM; in blue), the University of Colorado (CU; in yellow), and Swiss (in red) containers. Note that instruments located in the CU container were connected to sampling inlets on the bow crane. Measurements included nitrous oxide (N2O), ozone (O3), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), dimethylsulfide (DMS), selected volatile organic compounds (VOCs), gaseous elemental mercury (Hg(0)), and sulfur dioxide (SO2). The post-cruise analysis of discrete whole air samples collected in background air (upwind from research activities) was performed at the National Oceanic and Atmospheric Administration (NOAA) Global Monitoring Laboratory (GML). Note that in addition to continuous DMS measurements, discrete samples were also occasionally collected for independent DMS analysis in the CU container. In case of redundant measurements (e.g., CO2), the cross-evaluated individual datasets were used to generate a merged dataset in order to limit gaps in time series and facilitate further use by the community. Photo credit: Jan Rohde.
