NetMap's Watershed Assessment
Watershed Attribute: Climate Change - Summer Runoff. Predicted percent change from present (1916-2006) to 2040
Data Types: Raster; lines (reach)
Field Name:
Raster: fdsum; Average summer flow-percent change (grid)
Reach, channel segment (line): FDSum_l; Hist-2040 summer flow %change-segment scale (reach)
Reach, aggregated downstream (line): nday_c; Hist-2040 summer flow %change-averaged downstream (reach)
Units: Percent change (can be positive or negative)
NetMap Level 1 Module/Tool: Vegetation/Fire/Climate - Climate Change Vulnerability
Model Description: NetMap's Climate Change Vulnerability tool is used to display and evalute the downscaled climate change predictions involving temperature, precipitation, snowmelt, snow-water-equivalent, and summer and winter runoff (stream flows). The tool provides an efficient means to quickly locate the greatest forecasted changes in climate. Predictions in NetMap are reported in percent (%) change from historical (1916-2006) to forecasts in 2040 (positive and negative values). The tool is also used to quickly search for landscape vulnerability to climate change by examining intersections among climate change, wildfire risk, and in-stream habitat and channel sensitivity indicators (using any percentile of the distribution).
The scenarios represent a composite average of ten global climate models (GCM) for the western US using four bracketing scenarios based on four GCMs (ECHAM5, MIROC_3.2, HADGEM1, and PCM1). Predictions are for one greenhouse gas scenario (A1B, a middle of the road scenario for future emissions). Results are in percent change from historical (1916-2006) to forecasts in 2040. Forecasts were obtained from University of Washington Climate Impacts Group. For additional background information on how forecasts were made, see here and here.
