Mean annual precipitation, (1971-2000) for the Apache-Sitgreaves study area, Arizona, USA
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Resource Abstract:
This map represents the average annual precipitation, simulated by the model MC1 for the 30-year period 1970-2000. <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.
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Citation
Title Mean annual precipitation, (1971-2000) for the Apache-Sitgreaves study area, Arizona, USA