Source:         Princeton University
Name:           Princeton Global Forcings
Period:         Jan-1948 - Dec-2016
Times:          3-hourly, daily, monthly
Coverage:       Global
Resolution:     0.25-degree
Grid:           Latitude-longitude
Type:           Observational-Reanalysis hybrid
Related Sites:	http://hydrology.princeton.edu/data/index.html
Publications:   Sheffield, J., G. Goteti, and E. F. Wood, Development of a
		50-yr high-resolution global dataset of meteorological forcings for land
		surface modeling, J. Climate, 19 (13), 3088-3111.
Variables:	Precipitation (prcp)
		Air temperature at 2m above ground (tas)
		Downward longwave at surface (dlwrf)
		Downward shortwave at surface (dswrf)
		Surface pressure (pres)
		Specific humidity (shum)
		Windspeed (wind)
Formats:        NetCDF
History:	Original data version 1 (V1) and updates (V2, V2.2, V3)	
Volume:         3hourly: 
		0.25deg: 5-8 GB/year/variable; daily: 0.5-1.0 GB/year/variable; monthly: 0.01 GB/year/variable 
Date Created:   Tue May 29 00:00:00 EDT 2018
Change Log:     

1) Tue May 29 00:00:00 EDT 2018
New version V3 added to website
V3 is 0.25-degree, 3-hourly, semi-global, 1948-2016
It contains a number of upgrades including
- extension to 2016
- updated method for rain day correction
- many others (to be documented here)