WPS Version 4.3.1

This minor release of the WPS fixes several small issues in the WPS code and
should have no impact on the WPS output.

* Modify several print statements in the g2print utility
* Add new HRRR variables to variable tables in the g2 library
* Correct compilation issues with newer GNU Fortran compiler versions (10.1.0
  and later)

WPS Version 4.3

This release includes the following notable changes:

* The default namelist.wps file has been updated to a newer case, matching
  the new default namelist.input file in WRF.

* The GEOGRID.TBL.ARW files contain 20 new fields used by the new gwd_opt=3
  option in WRF.

* The GEOGRID.TBL.ARW.noahmp file includes fields for the new dynamic irrigation
  scheme in Noah-MP.

* A configure option, --nowrf, has been added to allow for configuration of
  the WPS without reference to a compiled WRF model; this is useful, e.g., if
  only the ungrib component of the WPS is needed.

* The ungrib program has been updated to handle a missing value added to NCEP
  GEFS land surface fields starting in September 2020.

* The ungrib program now handles data from before the year 1000.

* The plotfmt.ncl script now supports datasets on a Lambert conformal conic
  projection.

Acknowledgements: Special thanks are due to Michael Toy (NOAA/ESRL),
Ozan Mert Göktürk (University of Bergen), and Prasanth Valayamkunnath (NCAR).

WPS Version 4.2

This release includes the following notable changes:

* Improved support for the Linux/POWER9 platform

* The addition of an optional IRRIGATION field in geogrid, used by the new WRF
  option sf_surf_irr_scheme = 1, 2, and 3

* An update of Vtable.RAP.hybrid.ncep to handle newer RAP and HRRR data and to
  include microphysical (QNC) and aerosol (QNWFA, QNIFA) fields

* A correction to the LANDMASK calculation when using the 'modis_15s_lake' land
  use dataset

* A modification to ungrib and g2print to permit negative starting latitudes for
  datasets on a Gaussian grid

* A correction to calc_ecmwf_p to avoid the use of uninitialized data in
  the computation of the GHT field when only a subset of EC levels is available

Acknowledgements: Special thanks are due to Hugo Hartmann, Linda Maoyi, and
markelg for identifying issues and proposing fixes included in this release.

WPS Version 4.1

This release includes the following notable changes:

* The addition of support for a MODIS 15-arc-second land use dataset with lakes.
  - This dataset is described in

    Broxton, P. D., Zeng, X., Sulla-Menashe, D., & Troch, P. A. (2014). A global
    land cover climatology using MODIS data. Journal of Applied Meteorology and
    Climatology, 53(6), 1593-1605. DOI: 10.1175/JAMC-D-13-0270.1

    and may be activated by prepending the geog_data_res namelist option with
    'modis_15s_lake+' after downloading the dataset.

* The addition of initial support for POWER systems running Linux with the XL
  compilers.

* Adjustments to the RH field from GEFS data to be w.r.t. liquid water, as is
  done for GFS, CDAS, and ECMWF.

* A change in the default mean sea-level pressure field from smooth PRMSL to
  unsmoothed MSLET for GFS datasets.

* Corrections to the rotation of horizontal wind vectors that are provided on
  a Cassini/rotated lat-lon projection.

WPS Version 4.0.3

This minor release of the WPS fixes several small issues in the WPS code, and is
expected to have no impact on model results.

* The configure script is now capable of detecting a WRF build in ../WRF-4.0.3.

* Compiler warnings about truncated strings when building the g1print utility
  with the GNU compilers have been addressed.

* The non-standard "-f90=" and "-cc=" options to MPI compiler wrappers have been
  removed from several configuration stanzas.

* An inconsequential bug in metgrid that led to the incorrect detection of
  geogrid v4.0.1 output as v4.0 output has been fixed.

WPS Version 4.0.2

This minor release of WPS, Version 4.0.2, updates the system to address two minor
issues in the ungrib program. These were necessary to allow successful building
and running on a Cray platform.

* A Fortran continuation directive in subroutine rrpr was modified.

* As Ungrib only uses unpacking and decoding functions, references to unused
  packing and encoding routines, whose unnecessary compilation would have
  required mods to enable on a Cray, were removed from the g2 subdirectory
  makefile.

WPS Version 4.0.1

This bug-fix release of the WPS addresses one significant issue in metgrid
and several other minor clean-up items.

* The metgrid program now supports the use of input meteorological datasets
  on a rotated latitude-longitude projection that provide a grid-relative
  horizontal wind field. In particular, this allows the WPS to properly use
  NCEP RAP data.

* The default path of the static, geographical datasets has been updated to
  reflect re-organization of the NWSC /glade filesystem. This change should
  only benefit users of NWSC Cheyenne.

* The logic in the configure.wps script has been updated to better locate
  new WRF source code that was obtained either by cloning the WRF GitHub
  repository or by downloading a GitHub archive file.

WRF Pre-processing System Version 4.0

This release includes the following notable changes:

* Introduction of a 'lowres' option for geog_data_res to select coarse resolution
  (typically, 5-arc-minutes) sources for all mandatory static fields. This is
  useful in educational contexts or when the size of the geographical datasets
  must be minimized, e.g., when teaching with WRF/WPS in a Docker container or
  in the cloud.

* New GEOGRID.TBL entry for a pre-computed urban fraction field (FRC_URB2D) based
  on 30-meter NLCD 2011 data.

* A change in the default source of data for the MAXSNOALB and ALBEDO12M fields.
  The new defaults are MODIS-based and higher resolution.

* Two fixes for numerical inaccuracies in the polar stereographic projection.

* A new namelist option for ungrib, pmin, to specify the minimum pressure to
  extract from isobaric datasets.

* A combined Vtable for all CFSR/CFSv2 data, both pressure-level and surface
  fields (Vtable.CFSR).

* Added support for NCAR RDA's ECMWF "ds113.1" dataset.

* Added support for FV3GFS GRIB data.

* Generally, in the v4.0 release of the WPS, there is a move towards a model
  for handling geographical static fields in which all static fields that are
  not required by the default WRF namelist are optional from the viewpoint of
  geogrid.
  - Datasets that were previously mandatory but that are now optional:
    VAR_SSO and LAKE_DEPTH.

Note: There are now three types of downloads for the static, geographical data:
(1) Download the "full-resolution" sources for all default, mandatory fields.
    Use this download for all simulations where accuracy is important.

(2) Download the "low-resolution" sources for all mandatory fields.
    Use this download for testing and educational purposes.

(3) Downloads for individual, optional geographical fields.
    Obtain these datasets as needed by different model options.

WRF Pre-processing System Version 3.9.1

WRF Pre-processing System Version 3.9.0.1