Figure : ngp_hydrologic-change_v1

Hydrologic Changes Across the Northern Great Plains

Figure 22.3

North Carolina State University
Kenneth E. Kunkel

This figure appears in chapter 22 of the Impacts, Risks, and Adaptation in the United States: The Fourth National Climate Assessment, Volume II report.

These maps show historical (left; 1976–2005) and projected changes (right; 2036-2065) under a higher scenario (RCP8.5) in average snowpack (top row) and annual streamflow (bottom row). Snowpack is measured in terms of snow water equivalent, or SWE—the depth in inches of the amount of water contained in the snowpack. The top two maps show average values for March to provide historical and future end-of-season estimates of SWE. This illustrates projected warming and potential snow loss. Projected decreases in snowpack across montane western regions in the upper-right plot are primarily the result of projected warming at the highest elevations. Projected increases in snow at lower elevations are less important, since those changes are relative to a much lower average (top left) than in montane regions. Similarly, annual streamflows are expected to increase across much of the eastern part of the region, with isolated but important decreases in the western highlands. In this context, streamflow refers to the sum of surface runoff and subsurface flow for each location in space. Sources: NOAA NCEI and CICS-NC.

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This figure was created on June 09, 2017.

This figure was submitted on December 03, 2018.

Provenance
This figure was derived from scenario rcp_8_5


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