Update documentation for ERA5 with new variables

[lukasbrunner]

Description

As discussed in #2097 some variables were added to the on-the-fly fixes for ERA5 data. This PR updates the documentation acordingly.

• Closes Update documentation for Supported datasets/ERA5 #2097
• Link to documentation:

---

• ☝ Create an issue to discuss what you are going to do

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

---

[lukasbrunner]

Okay how does this look? Apart from the fact that I obviously have no idea how internal links work... I found it important to mention that the upward radiation variables are calculated on the fly so they are available even though they are not in the input data repository.

[Peter9192]

Hmm, that double asterix doesn't seem to work if you look at the docs preview (you can find it if you click the details on the github check for docs). Maybe we can use labelled footnotes instead? That would look something like:

[#note1]_ and [#note2]_ in conjunction with

.. [#note1] ERA5 cmorization is built into ...
.. [#note2] Derived on the fly from down & net radiation

[lukasbrunner]

Okay that worked thanks are you happy with that @Peter9192 ?

[Peter9192]

Yes, this looks find with me. Thanks for picking that up :-)

[nielsdrost]

Thanks @Peter9192 and @lukasbrunner!