([full changelog](https://github.com/NCAR/pop-tools/compare/7c993d45499ffc300e22665f0160a756dc991b81...452856dd8256989eb500021d4752cfa90eaf32bc))
New Features
- Added CFC solubility functions [91](https://github.com/NCAR/pop-tools/pull/91) ([matt-long](https://github.com/matt-long))
- Extend `to_xgcm_grid_dataset()` to support POP datasets with non canonical dimensions [94](https://github.com/NCAR/pop-tools/pull/94) ([andersy005](https://github.com/andersy005))
Breaking Changes
- Upgrade minimum Python version to 3.7 [79](https://github.com/NCAR/pop-tools/pull/79) ([andersy005](https://github.com/andersy005))
- ⬆️ Upgrade dependencies and pin minimum versions [68](https://github.com/NCAR/pop-tools/pull/68) ([andersy005](https://github.com/andersy005))
Bug Fixes
- Update pooch downloader: use `CESMDATAROOT` variable when available [52](https://github.com/NCAR/pop-tools/pull/52) ([andersy005](https://github.com/andersy005))
Documentation
- Experiment with using xoak for indexing [84](https://github.com/NCAR/pop-tools/pull/84) ([dcherian](https://github.com/dcherian))
- 📚 Documentation cleanup [81](https://github.com/NCAR/pop-tools/pull/81) ([andersy005](https://github.com/andersy005))
- Fix Typo in docs [80](https://github.com/NCAR/pop-tools/pull/80) ([andersy005](https://github.com/andersy005))
- Remove sticky sidebar due to responsiveness issues on small screens [77](https://github.com/NCAR/pop-tools/pull/77) ([andersy005](https://github.com/andersy005))
- Add example notebook to demonstrate POP2 heat budget closure with xgcm metrics [75](https://github.com/NCAR/pop-tools/pull/75) ([ALDepp](https://github.com/ALDepp))
- 📚 New docs theme & Add comments [74](https://github.com/NCAR/pop-tools/pull/74) ([andersy005](https://github.com/andersy005))
- Use `execution_excludepatterns` to exclude long running notebooks [76](https://github.com/NCAR/pop-tools/pull/76) ([andersy005](https://github.com/andersy005))
Internal Changes
- Bump pre-commit/action from v2.0.2 to v2.0.3 [92](https://github.com/NCAR/pop-tools/pull/92) ([dependabot](https://github.com/dependabot))
- Bump pre-commit/action from v2.0.0 to v2.0.2 [90](https://github.com/NCAR/pop-tools/pull/90) ([dependabot](https://github.com/dependabot))
- Bump styfle/cancel-workflow-action from 0.8.0 to 0.9.0 [89](https://github.com/NCAR/pop-tools/pull/89) ([dependabot](https://github.com/dependabot))
- Update CI [78](https://github.com/NCAR/pop-tools/pull/78) ([andersy005](https://github.com/andersy005))
Contributors to this release
([GitHub contributors page for this release](https://github.com/NCAR/pop-tools/graphs/contributors?from=2020-12-15&to=2021-05-29&type=c))
[ALDepp](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3AALDepp+updated%3A2020-12-15..2021-05-29&type=Issues) | [andersy005](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3Aandersy005+updated%3A2020-12-15..2021-05-29&type=Issues) | [dcherian](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3Adcherian+updated%3A2020-12-15..2021-05-29&type=Issues) | [dependabot](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3Adependabot+updated%3A2020-12-15..2021-05-29&type=Issues) | [Eddebbar](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3AEddebbar+updated%3A2020-12-15..2021-05-29&type=Issues) | [matt-long](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3Amatt-long+updated%3A2020-12-15..2021-05-29&type=Issues) | [mgrover1](https://github.com/search?q=repo%3ANCAR%2Fpop-tools+involves%3Amgrover1+updated%3A2020-12-15..2021-05-29&type=Issues)