Table 9 List of attributes in the files originating from the CU container or Met City, and archived on the Arctic Data Center.

From: Year-round trace gas measurements in the central Arctic during the MOSAiC expedition

Variable

Definition

Date_Time_UTC

Date and Time of measurement in Coordinated Universal Time

latitude

Latitude of Research Vessel Polarstern in degrees north

longitude

Longitude of Research Vessel Polarstern in degrees east

MOSAiC_event_label

Event list of MOSAiC campaign PS122

compound_unit (CH4_ppb, CO2_ppm, O3_ppb, DMS_ppt, Hg0_ng_per_m3, propane_ppt, i_butane_ppt, n_butane_ppt, isoprene_ppt)

Ambient air mole fraction or concentration

compound_unit_adjusted (CH4_ppb_adjusted, CO2_ppm_adjusted, O3_ppb_adjusted)

Adjusted ambient air mole fraction after cross-evaluation

pollution_flag

Pollution flag were “yes” means that local pollution was detected

  1. The variable compound_unit_adjusted is present only in case of cross-evaluation. As measurements were only performed when the wind was from the clean air sector, the files do not include a pollution flag (data exempt from local anthropogenic pollution). The variable pollution_flag is only present for ozone for which a few data points had to be manually flagged.
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