Table 1. NRCC (Northeast Regional Climate Center, Cornell University, Ithaca, NY; www.nrcc.cornell.edu) and PRISM (Parameter Regression on Independent Slopes Model) product summary [17].
| Data Product | Resolution | Domain | Data Sources | Methods | |||
| Temporal | Spatial | Temporal | Spatial | Primary | Secondary | ||
| PRISM [2] | Monthly | 4 km | 1895-present | Contiguous 48 US states | Station records | 4 km elevation model;geographic facets1 | Regression models based on elevation, facets, using an expert system with weighting schemes |
| NRCC [8] | Daily | 2.5 arc-min (4 kmat 45°N) | 1979-present | US Northeast (NY, VT, NH,ME, MA, RI, CT, PA, NJ) | North American RegionalReanalysis2; Selected COOP3Stations | 2.5 arc min (4 km)elevation model | Downscaling of NARR to 4 km elevation model; Bias correction within a defined radius using selected COOP stations |
1
Geographical facets in PRISM represent combinations of slope, aspect and elevation generated by the PRISM system for regression modeling and interpolation.
2
The North American Regional Reanalysis (NARR) is a 50 km resolution model output generated by a regional meteorological model that has been back-calibrated with observed satellite, radar and ground-based instrumental records [21].
3
NOAA Cooperative Observer Network (COOP) weather stations.