MOPITT V9 TIR Anomaly Event Flags

The MOPITT Version 9 Thermal-InfraRed (TIR) total column carbon monoxide (CO) measurement product has been analyzed to identify observations strongly impacted by anomalous CO emission events that perturb the CO total column from its typical behaviour, using the technique described in Jeffery et al. (2023). This technique is applied to the Level 2 MOPITT TIR CO total column observations, which have been gridded to 0.5 degree latitude by 0.5 degree longitude and averaged to produce daily mean columns at this resolution. Those grid cells displaying anomalous CO daily mean observations, termed anomaly events, are provided here.

One txt file is produced for each 10 degree latitude band. Each file contains a list of anomaly events, as identified through the above method. Each of the listed events gives the year, day of year, latitude, and longitude of the anomaly event. In addition, for each flagged event, the anomaly threshold for the associated grid cell, and the daily-mean CO total column and measurement uncertainty are presented.

Version 1.0 of these flag files covers the period March 2000 to July 2022, and are those used in Jeffery et al. (2023). This time period has been extended in subsequent versions.