1a) USGS Geo Data Portal
Yes, Open Source codebase
cida.usgs.gov/climate/gdp/
Downscaled data: Statistical  BCSD and K. Hayhoe ARRM methodology; Dynamical  Hostettler data set from RegCM3 RCM. 
 Observed gridded and point data
 Downscaled GCM gridded and point data
 Weighted area average statistics (Mean, Minimum, Maximum, Variance, St Dev, Weight_Sum, Count)
 Final summary of statistics by time step, polygon (region), or by attribute (variable)
 Tmax, Tmin, daily precip
 approx. 12km
 15 km for Hostettler dataset;

 daily downscaled (K. Hayhoe, Hostettler data)
 monthly downscaled (BCSD Maurer et al. 2007, Hostetler data)
 decadal data  Hostetler dataset
 daily observed (Maurer et al. 2002)
CONUS and Alaska
 Periods: obs 19501990; Hayhoe 19602099, BCSD 19502099
 Hayhoe data – PCM, CCSM3, GFDL2.0, GFDL 2.1, BCM2, CGCM3, CNRM, ECHAM5, ECHO, HadCM3; A1FI, A1B, A2, B1
 BCSD – 16 GCMs, 36 projections, A1B, A2, B1.
Hostetler dataset  GCM forcing  MPI ECHAM5, GFDL CM2.0, USGS GENMOM; periods 1968–1999, 2040–2069, and 2 simulations for 2010– 2099; A2

 Area or a point
 Algorithm – a) weighted grid statistics or b) feature coverage OPeNDAP intersection
(for (a) choose delimiter, statistics, group columns by feature or attribute, summarize time step or feature attribute)
 Available datasets
 Datatype
(model, emissions, variable)
 Data range (from to)
Output data – delimited text – comma or space. 
 Polygons drawn by user or supplied as shapefiles, or chosen from a list of available shapefiles
 Complex polygons can be created because each click creates a point in the contours
 Several variable combinations can be run with 1 request related to one data set; separate data sets to be accessed with different requests
 Metadata about the provided data sets is available
 Allows for ensemble approach 