The default data sources for the HGT_M, LANDUSEF/LU_INDEX, and GREENFRAC fields have been updated in v3.8 for ARW:
* HGT_M now defaults to 30-arc-second USGS GMTED2010
* GREENFRAC now defaults to MODIS FPAR
* LU_INDEX/LANDUSEF now defaults to 21-class IGBP MODIS.
For information on how to recover the behavior of v3.7.1 and earlier, see the notes in the example namelist.wps files included with the WPS source code. The GMTED2010 data have been reformatted for use with the WPS, and voids over Lake Superior and the Caspian Sea have been filled (thanks to Peter Lauritzen, NCAR). More information on the GMTED2010 data is available at http://topotools.cr.usgs.gov/gmted_viewer/ .