In the NOAA GHG embed environment, the monthly average chart does not completely align and looks to be shifted from the daily average chart.
The misalignment in charts (ref. attached image) seems to be caused by the selection of dates for monthly and daily averages (which is taken as 00:00 (UTC) for daily and the first of each month at 00:00 (UTC) for monthly).
Selecting mean dates for the mean GHG concentration during aggregation will probably resolve the issue.
In the NOAA GHG embed environment, the monthly average chart does not completely align and looks to be shifted from the daily average chart. The misalignment in charts (ref. attached image) seems to be caused by the selection of dates for monthly and daily averages (which is taken as 00:00 (UTC) for daily and the first of each month at 00:00 (UTC) for monthly). Selecting mean dates for the mean GHG concentration during aggregation will probably resolve the issue.