Forrest Melton

Member since: Mar 28, 2011, CSU Monterey Bay / NASA Ames Research Center

Sample Images from the NEX Downscaled Climate Projections

shared by Forrest Melton on May 08, 2014


Description of the Images

These images provide examples from the NASA Earth Exchange Downscaled Climate Projections (NEX-DCP30) for the U.S. The images show daily average maximum temperature for the beginning of each decade in July from 1950-2100. Data for 1950-2000 is based on climate simulations driven with observed data, and data for 2010-2100 is based on the ensemble average of all climate models under the highest greenhouse gas emissions pathway evaluated (Representative Concentration Pathway 8.5). At present, the global rate of greenhouse gas emissions is tracking at or above this highest emissions pathway.

Image Credits

Alberto Guzman / Forrest Melton, Cooperative for Research in Earth Science and Technology at NASA Ames Research Center (NASA ARC-CREST)

Dataset Credits

Bridget Thrasher, Jun Xiong, Weile Wang, Forrest Melton, Andrew Michaelis, Rama Nemani

About the NEX-DCP30 Data

Using the supercomputing resources and Earth observation datasets available through the NASA Earth Exchange (NEX), scientists have completed and released nationwide, high-resolution projections of climate conditions for the United States through the year 2100. This dataset provides information derived from the latest global climate simulations and provides data for resource managers, urban planners and the climate change science community at the scale of individual neighborhoods. Production of this dataset required hundreds of thousands of CPU hours and very large volumes of data, and would have previously taken more than a year to complete. Using the supercomputing resources provided by the NASA Earth Exchange and the NASA Advanced Supercomputing division, the team of scientists was able to complete the downscaled, high resolution climate dataset for the U.S. within months of release of the final global climate scenarios prepared for the IPPC Fifth Assessment Report.

Technical Summary

The NEX-DCP30 dataset provides information on projected temperature and precipitation patterns for the conterminous U.S. (lower 48 states) at the resolution of 30 arc-seconds (800m or approximately 0.5 miles x 0.5 miles). The downscaled climate projections were derived from the latest climate scenarios produced by an ensemble of global general circulation models (GCMs) for the IPCC 5th Assessment Report (IPCC AR5).

The NEX-DCP30 data provides high resolution information on future climate conditions, and the data have been corrected to account for the effect of local topography (e.g., mountains) on temperature and precipitation patterns. The NEX-DCP30 data was produced to provide high resolution climate scenarios that will allow climate scientists, hydrologists, land and natural resource managers, city planner, engineers and others to quantify climate change impacts on a wide range of conditions and resources that are important to local communities: water supplies and winter snowpacks, urban heat island effects, public health and the spread of vectorborne diseases, flood risk and potential impacts to critical urban infrastructure, wildfire frequency and severity, agricultural production, wildlife and biodiversity, and many others.

For additional information, please see:


tasmax_July_historical_1950_sp.png tasmax_July_historical_1950_sp.png
Average Daily Maximum Temperature, July 1950
11890526 51 downloads
tasmax_July_historical_1960_sp.png tasmax_July_historical_1960_sp.png
Average Daily Maximum Temperature, July 1960
11907848 33 downloads
tasmax_July_historical_1970_sp.png tasmax_July_historical_1970_sp.png
Average Daily Maximum Temperature, July 1970
11898220 31 downloads
tasmax_July_historical_1980_sp.png tasmax_July_historical_1980_sp.png
Average Daily Maximum Temperature, July 1980
11900727 32 downloads
tasmax_July_historical_1990_sp.png tasmax_July_historical_1990_sp.png
Average Daily Maximum Temperature, July 1990
11871646 28 downloads
tasmax_July_historical_2000_sp.png tasmax_July_historical_2000_sp.png
Average Daily Maximum Temperature, July 2000
11831604 29 downloads
tasmax_July_rcp85_2010.png tasmax_July_rcp85_2010.png
Average Daily Maximum Temperature, RCP 8.5, July 2010
11924497 51 downloads
tasmax_July_rcp85_2020.png tasmax_July_rcp85_2020.png
Average Daily Maximum Temperature, RCP 8.5, July 2020
11895760 45 downloads
tasmax_July_rcp85_2030.png tasmax_July_rcp85_2030.png
Average Daily Maximum Temperature, RCP 8.5, July 2030
11846630 38 downloads
tasmax_July_rcp85_2040.png tasmax_July_rcp85_2040.png
Average Daily Maximum Temperature, RCP 8.5, July 2040
11805048 36 downloads
tasmax_July_rcp85_2050.png tasmax_July_rcp85_2050.png
Average Daily Maximum Temperature, RCP 8.5, July 2050
11776305 54 downloads
tasmax_July_rcp85_2060.png tasmax_July_rcp85_2060.png
Average Daily Maximum Temperature, RCP 8.5, July 2060
11720391 42 downloads
tasmax_July_rcp85_2070.png tasmax_July_rcp85_2070.png
Average Daily Maximum Temperature, RCP 8.5, July 2070
11623857 37 downloads
tasmax_July_rcp85_2080.png tasmax_July_rcp85_2080.png
Average Daily Maximum Temperature, RCP 8.5, July 2080
11539129 37 downloads
tasmax_July_rcp85_2090.png tasmax_July_rcp85_2090.png
Average Daily Maximum Temperature, RCP 8.5, July 2090
11449039 82 downloads
tasmax_July_rcp85_2100.png tasmax_July_rcp85_2100.png
Average Daily Maximum Temperature, RCP 8.5, July 2100
11249323 67 downloads

Other projects using this item:

National Climate Assessment


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