xclim 0.33.0

v0.33.0

on Python PyPI

Contributors to this version: Trevor James Smith (@Zeitsperre), Pascal Bourgault (@aulemahal), Tom Keel (@Thomasjkeel), Jeremy Fyke (@JeremyFyke), David Huard (@huard), Abel Aoun (@bzah), Juliette Lavoie (@juliettelavoie), Yannick Rousseau (@yrouranos).

Announcements

• Deprecation: Release 0.33.0 of xclim will be the last version to explicitly support Python3.7 and xarray<0.21.0.
• xclim now requires yaml files to pass yamllint checks on Pull Requests. (PR/981).
• xclim now requires docstrings have valid ReStructuredText formatting to pass basic linting checks. (PR/993). Checks generally require:
  • Working hyperlinks and reference tags.
  • Valid content references (e.g. :py:func:).
  • Valid NumPy-formatted docstrings.
• The xclim developer community has now adopted the 'Contributor Covenant' Code of Conduct v2.1 (text <https://www.contributor-covenant.org/version/2/1/code_of_conduct/>_). (GH/948, PR/996).

New indicators

• jetstream_metric_woollings indicator returns latitude and strength of jet-stream in u-wind field. (GH/923, PR/924).

New features and enhancements

• Features added and modified to allow proper multivariate adjustments. (PR/964).
  • Added xclim.sdba.processing.to_additive_space and xclim.sdba.processing.from_additive_space to transform "multiplicative" variables to the additive space. An example of multivariate adjustment using this technique was added to the "Advanced" sdba notebook.
  • xclim.sdba.processing.normalize now also returns the norm. xclim.sdba.processing.jitter was created by combining the "under" and "over" methods.
  • xclim.sdba.adjustment.PrincipalComponent was modified to have a simpler signature. The "full" method for finding the best PC orientation was added. (GH/697).
• New xclim.indices.stats.parametric_cdf function to facilitate the computation of return periods over DataArrays of statistical distribution parameters (GH/876, PR/984).
• Add copy parameter to percentile_doy to control if the array input can be dumped after computing percentiles (GH/932, PR/985).
• New improved algorithm for dry_spell_total_length, performing the temporal indexing at the right moment and with control on the aggregation operator (op) for determining the dry spells.
• Added properties.py and measures.py in order to perform diagnostic tests of sdba (GH/424, PR/967).
• Update how percentile_doy rechunk the input data to preserve the initial chunk size. This should make the computation memory footprint more predictable (GH/932, PR/987).

Breaking changes

• To reduce import complexity, select_time has been refactored/moved from xclim.indices.generic to xclim.core.calendar. (GH/949, PR/969).
• The stacking dimension of xclim.sdba.stack_variables has been renamed to "multivar" to avoid name conflicts with the "variables" property of xarray Datasets. (PR/964).
• xclim now requires cf-xarray>=0.6.1. (GH/923, PR/924).
• xclim now requires statsmodels. (GH/424, PR/967).

Internal changes

• Added a CI hook in .pre-commit-config.yaml to perform automated pre-commit corrections with GitHub CI. (PR/965).
• Adjusted CI hooks to fail earlier if lint checks fail. (PR/972).
• TrainAdjust and Adjust object have a new skip_input_checks keyword arg to their train and adjust methods. When True, all unit-, calendar- and coordinate-related input checks are skipped. This is an ugly solution to disappearing attributes when using xr.map_blocks with dask. (PR/964).
• Some slow tests were marked slow to help speed up the standard test ensemble. (PR/969).
  • Tox testing ensemble now also reports slowest tests using the --durations flag.
• pint no longer emits warnings about redefined units when the logging module is loaded. (GH/990, PR/991).
• Added a CI step for cancelling running workflows in pull requests that receive multiple pushes. (PR/988).