v0.20.0

Breaking changes

• xclim.subset has been deprecated and now relies on clisops to perform specialized spatio-temporal subsetting.
  Install with pip install xclim[gis] in order to retain the same functionality.
• The python library pandoc is no longer listed as a docs build requirement. Documentation still requires a current
  version of pandoc binaries installed at system-level.
• ANUCLIM indices have seen their input_freq parameter renamed to src_timestep for clarity.
• A clean-up and harmonization of the indicators metadata has changed some of the indicator identifiers, long_names, abstracts and titles. xclim.atmos.drought_code and fire_weather_indexes now have indentifiers "dc" and "fwi" (lowercase version of the previous identifiers).
• xc.indices.run_length.run_length_with_dates becomes xc.indices.run_length.season_length. Its argument date is now optional and the default changes from "07-01" to None.
• xc.indices.consecutive_frost_days becomes xc.indices.maximum_consecutive_frost_days.
• Changed the history indicator output attribute to xclim_history in order to respect CF conventions.

New indicators

• atmos.max_pr_intensity acting on hourly data.
• atmos.wind_vector_from_speed, also the wind_speed_from_vector now also returns the "wind from direction".
• Richards-Baker flow flashiness indicator (xclim.land.rb_flashiness_index).
• atmos.max_daily_temperature_range.
• atmos.cold_spell_frequency.
• atmos.tg_min and atmos.tg_max.
• atmos.frost_season_length, atmos.first_day_above. Also, atmos.consecutive_frost_days now takes a thresh argument (default : 0 degC).

New features and enhancements

• sdba.loess submodule implementing LOESS smoothing tools used in sdba.detrending.LoessDetrend.
• xclim now depends on clisops for subsetting, offloading several heavy GIS dependencies. This improves
  maintainability and reduces the size of a "vanilla" xclim installation considerably.
• New generic.parametric_quantile function taking parameters estimated by generic.fit as an input.
• Add support for using probability weighted moments method in generic.fit function. Requires the
  lmoments3 package, which is not included in dependencies because it is unmaintained. Install manually if needed.
• Implemented _fit_start utility function providing initial conditions for statistical distribution parameters estimation, reducing the likelihood of poor fits.
• Added support for indicators based on hourly (1H) inputs, and a first hourly indicator called max_pr_intensity
  returning hourly precipitation intensity.
• Indicator instances can be retrieved through their class with the get_instance() class method.
  This allows the use of xclim.core.indicator.registry as an instance registry.
• Indicators now have a realm attribute. It must be given when creating indicators outside xclim.
• Better docstring parsing for indicators: parameters description, annotation and default value are accessible in the json output and Indicator.parameters.
• New command line interface xclim for simple indicator computing tasks.
• New sdba.processing.jitter_over_thresh for variables with a upper bound.
• Added op parameter to xclim.indices.daily_temperature_range to allow resample reduce operations other than mean
• core.formatting.AttrFormatter (and thus, locale dictionaries) can now use glob-like pattern for matching values to translate.

Bug fixes

• The ICCLIM module was identified as icclim in the documentation but the module available under ICCLIM. Now icclim == ICCLIM and ICCLIM will be deprecated in a future release.

Internal changes

• xclim.subset now attempts to load and expose the functions of clisops.core.subset. This is an API workaround preserving backwards compatibility.
• Code styling now conforms to the latest release of black (v0.20.8).
• New IndicatorRegistrar class that takes care of adding indicator classes and instances to the
  appropriate registries. Indicator now inherits from it.