Removed automatic conversion of precipitation units from monitoring diagnostic

[schlunma]

Description

Currently, the diagnostic monitor/multi_datasets.py automatically converts precipitation units from kg m-2 s-1 to mm day-1 even if the user does not ask for this. The reason for this was that ESMValCore was not able to do that conversion in the preprocessor.

Since ESMValGroup/ESMValCore#1574 and ESMValGroup/ESMValCore#1837 this conversion is now possible; thus, the conversion can be removed from the diagnostic.

How to change recipes?

To use the unit conversion for precipitation in the new version of this diagnostic, add the following preprocessor for the precipitation dataset to the recipe:

convert_units:
  units: mm day-1

---

Checklist

It is the responsibility of the author to make sure the pull request is ready to review. The icons indicate whether the item will be subject to the 🛠 Technical or 🧪 Scientific review.

• 🛠 This pull request has a descriptive title
• 🛠 Code is written according to the code quality guidelines
• 🛠 Documentation is available
• 🛠 Tests run successfully
• 🛠 The list of authors is up to date
• 🛠 Any changed dependencies have been added or removed correctly
• 🛠 All checks below this pull request were successful

New or updated recipe/diagnostic

• 🧪 Recipe runs successfully
• 🧪 Recipe is well documented
• 🧪 Figure(s) and data look as expected from literature
• 🛠 Provenance information has been added

---

To help with the number of pull requests:

• 🙏 We kindly ask you to review two other open pull requests in this repository

[schlunma]

To use the unit conversion in the new version of this diagnostic, add the following preprocessor for the precipitation dataset to the recipe:

convert_units:
  units: mm day-1

[schlunma]

@esmvalbot Please run monitor/recipe_monitor_with_refs.yml

[esmvalbot]

Since @schlunma asked, ESMValBot will run recipe monitor/recipe_monitor_with_refs.yml as soon as possible, output will be generated here

[esmvalbot]

ESMValBot is happy to report recipe monitor/recipe_monitor_with_refs.yml ran OK, output has been generated here

[valeriupredoi]

do you not want to add the conversion preprocessor to the recipe? Apart from that - one of the easiest reviews ever 😁

[schlunma]

do you not want to add the conversion preprocessor to the recipe? Apart from that - one of the easiest reviews ever grin

The recipe uses temperature and not precipitation - so no, I don't want to add that 😅

[valeriupredoi]

surely some American will complain their temperature is indeed measured in mm/day 🤣

[valeriupredoi]

@remi-kazeroni you wanna merge this, bud? Unless you think temperature is measured in mm/day 😆

[remi-kazeroni]

@schlunma, could you please move or duplicate these instructions to the description PR? This would help the release manager to draft the changelog 🍻 This can then be merged. Thanks!

[schlunma]

Done!

[remi-kazeroni]

Thanks for your contribution @schlunma and the review @valeriupredoi!