Greenhouse Warming Linked to Shifts in December, January, and February Rainfall

  • Released Wednesday, May 15, 2013
  • Updated Wednesday, September 21, 2016 at 2:35PM
  • ID: 4081

Model simulations of December, January, and February show that warming from carbon dioxide will change the frequency that regions around the planet receive no rain (brown), light rain(brown), moderate rain(yellow) and very heavy rain(dark blue). The occurrence of no rain and heavy rain will increase, while moderate rainfall will decrease. This visual zooms into the United States to see the impact on the December. January, and February time periods.

Global warming may increase the risk for extreme rainfall and drought according to a NASA-led modeling study. The study shows for the first time how rising carbon dioxide concentrations could affect the entire range of rainfall types on Earth. Analysis of information from 14 climate models indicates wet regions of the world, such as the equatorial Pacific Ocean and the Asian monsoon regions, will likely see increases in heavy precipitation because of warming resulting from projected increases in carbon dioxide levels. Arid land areas outside the tropics and many regions with moderate rainfall could become drier.

The models project for every 1 degree Fahrenheit of carbon dioxide-induced warming, heavy rainfall will increase globally by 3.9 percent and light rain will increase globally by 1 percent. However, total global rainfall is not projected to change much because moderate rainfall will decrease globally by 1.4 percent.

This visualization displays areas with no rain (brown), moderate rain (tan), and heavy rain (blue). Very Heavy rainfall (cark blue) is defined as months that receive an average of 0.95 of an inch of rain per day (24 mm/day) every day for the months of June, July, and August. Heavy rainfall is defined as months that receive an average of more than about 0.35 of an inch per day (9 mm/day). Light rain is defined as months that receive an average of less than 0.01 of an inch per day. Moderate rainfall is defined as months that receive an average of between about 0.04 to 0.09 of an inch per day.

This frame sequence shows the same time period with the same NCAR CCSM data from a global perspective.

No description available.

Precipitation from NCAR's Community Climate System Model (CCSM) colorbar.

This frame sequence only has the NCAR CCSM precipitation layer that starts from a global perspective and ends with a North American perspective.

This frame sequence shows the NCAR CCSM precipitation data from a global perspective.

This frame set contains a squence of barplots showing fractional change in the frequency of no rain, moderate rain and heavy rain.

This frame set contains the date of each match rendered frame.


Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio


This visualization can be found in the following series:

Datasets used in this visualization

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