Percent change in mean annual precipitation (1971-2100) under MIROC medres A2 for the Apache-Sitgreaves study area, Arizona,
USA
Dataset Identification:
Resource Abstract:
This map represents the percent change in average annua precipitation, simulated by the model MC1 between the 30-year periods
1970-2000 and 2070-2100 under the MIROC medres climate change and A2 emissions scenarios. <br /> <br /> The vegetation model
MC1 (e.g. Bachelet et al. 2001) was used to simulate vegetation dynamics, associated carbon and nitrogen cycle, water budget,
and wild fire impacts at two study sites in eastern Oregon (Deschutes and Fremont-Winema National Forests) and in Arizona
(Apache Sitgreaves National Forest area) in the context of a project funded by the USDA Forest Service (PNW 09-JV-11261900-003).
Historical climate input data used to run the model were provided by the PRISM group (Chris Daly, OSU) at a 30arc second (800m)
spatial grain. The model was also run using future climate change projections from various general circulation models including
CSIRO Mk3 and MIROC 3.2 medres. Future climate change climate datasets were generated through statistical downscaling from
general circulation model output using a simple anomaly method and the climatology (1971-2000) from the PRISM group at 30arc
second spatial grain. The model was run assuming that nitrogen demand from the plants was always met so that the nitrogen
concentrations in various plant parts never dropped below their minimum reported values. A CO2 enhancement effect increased
productivity and water use efficiency as the <i>atmospheric CO2 concentration increased. </i>
Citation
Title Percent change in mean annual precipitation (1971-2100) under MIROC medres A2 for the Apache-Sitgreaves study area, Arizona,
USA