RC for PRISM

[lee1043]

If you are registering content (RC) for obs4MIPs, please fill out the requested information below. If you want to create an issue about something else, please delete the text below and title your issue as appropriate.

To register (or edit) some or all of the obs4MIPs RC, please title this github issue as follows:
"RC for " + your source_name (as you define below), and indicate if you are modifying your input from an earlier issue

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The following are required registered content (with example content for each item in bold). Please replace the example text below with your information to the right of the equal sign (DO NOT MAKE ANY CHANGES TO THE LEFT HAND SIDE OF THE EQUAL SIGN):

1. source_id['source_id'][key]['source_name'] = 'PRISM'
2. source_id['source_id'][key]['release_year'] = '2022'
3. source_id['source_id'][key]['source_description'] = 'PRISM'
4. source_id['source_id'][key]['source_version_number'] = ''
5. source_id['source_id'][key]['institution_id'] = 'OregonStateUniversity'
6. source_id['source_id'][key]['region'] = 'north america'
7. source_id['source_id'][key]['source_type'] = 'satellite_merged'
8. A list of CMIP variable_ids that the above information refers to. In most cases it will only be for one variable_id. If it is for more than one, please make sure your source_description is sufficiently general to apply to all relevant variable_ids.
   pr, tmax, tmean, tmin for 1981-present

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See note 14 and Appendix II of the obs4MIPs data specifications (https://goo.gl/jVZsQl) for more information regarding registered content, and feel free to ask questions!