While you need to use the full time series to qc and gapfill, you only want to append the most recent year(s) of qc'd and gapfilled data to the ongoing time series (e.g., append C1 qc'd and gapfilled temp 2019-2022 to the ongoing 1952-2018 ongoing gapfilled dataset, or append SDL 2022 to SDL 1987-2021). This could be coded manually each time, but to be consistent whenever things are updated and fool-proof natural human error (esp when tired :]), I think a function to do this would be a good idea!
While you need to use the full time series to qc and gapfill, you only want to append the most recent year(s) of qc'd and gapfilled data to the ongoing time series (e.g., append C1 qc'd and gapfilled temp 2019-2022 to the ongoing 1952-2018 ongoing gapfilled dataset, or append SDL 2022 to SDL 1987-2021). This could be coded manually each time, but to be consistent whenever things are updated and fool-proof natural human error (esp when tired :]), I think a function to do this would be a good idea!