Projected Monthly and Derived Precipitation Products - 2 km CMIP3/AR4

This set of files includes downscaled projections of monthly totals, and derived annual, seasonal, and decadal means of monthly total precipitation (in millimeters, no unit conversion necessary) from Jan 2001 - Dec 2100 at 2km x 2km spatial resolution.

Each set of files originates from one of five top ranked global circulation models from the CMIP3/AR4 models and SRES scenarios, or is calculated as a 5 Model Average.

The downscaling process utilizes PRISM climatological datasets from 1961-1990.

Brief descriptions of the datasets:

Monthly precipitation totals: The total precipitation, in mm, for the month.

For Decadal outputs:
1. Decadal Average Total Monthly Precipitation: 10 year average of total monthly precipitation. Example: All January precipitation files for a decade are added together and divided by ten.
2. Decadal Average Seasonal Precipitation Totals: 10 year average of seasonal precipitation totals. Example: MAM seasonal totals for every year in a decade are added together and divided by ten.
3. Decadal Average Annual Precipitation Totals: 10 year average of annual cumulative precipitation.

For seasonal means, the four seasons are referred to by the first letter of 3 months making up that season:

  • JJA: summer (June, July, August)

  • SON: fall (September, October, November)

  • DJF: winter (December, January, February)

  • MAM: spring (March, April, May)

Data and Resources

Additional Info

Spatial resolution

2000 meters

Temporal extent

Start date: January 2001

End date: December 2100


The following people worked on producing this data set:

  • Matthew Leonawicz
  • Michael Lindgren
  • Tom Kurkowski
  • John Walsh
  • Scott Rupp
Field Value
Maintainer Tom Kurkowski
Version 1.0.0
access_constraints [""]
bbox-east-long 180
bbox-north-lat 73.05271
bbox-south-lat 35.979
bbox-west-long -180
coupled-resource []
credits ["Matthew Leonawicz", "Michael Lindgren", "Tom Kurkowski", "John Walsh", "Scott Rupp"]
dataset-reference-date [{"type": "creation", "value": "2011-11-30T01:00:00"}]
frequency-of-update asNeeded
graphic-preview-description thumbnail
graphic-preview-file pr_decadal_mean_JJA_total_mm_5modelAvg_sresa1b_2050_2059_thumb_s.png
graphic-preview-type png
guid ef1cfde0-2ab5-454f-8bf4-79c03bb499cd
licence []
license Creative Commons Attribution 4.0
metadata-date 2018-03-27T14:31:58
responsible-party [{"name": "Scenarios Network for Alaska and Arctic Planning (SNAP)", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-180.0, 35.979], [180.0, 35.979], [180.0, 73.05271], [-180.0, 73.05271], [-180.0, 35.979]]]}
spatial-reference-system 3338
spatial-resolution 2000
spatial-resolution-units meters
spatial_harvester true
temporal-extent-begin 2001-01-15T00:00:00
temporal-extent-end 2100-12-15T11:00:00