Standard deviation for fall maximum temperature (Celsius), 2060-2079, 6 GCMs, B1 emission scenario
Dataset Identification:
Resource Abstract:
<p> <span style="">Using the simple anomaly method (modifying a historical baseline with differences or ratios projected by
General Circulation Models), scientists from the California Academy of Sciences downscaled monthly average temperature and
monthly total precipitation from 16 different global circulation models (GCMs). The GCMs were described in the latest Intergovernmental
Panel for Climate Change (IPCC 2007) and archived at the WCRP PCMDI (http://www-pcmdi.llnl.gov/ipcc/about_ipcc.php). Monthly
maximum temperature and monthly minimum temperatures were downscaled from the only 6 GCMs that archived these particular variables.
Scientists used Worldclim v.1.4 (Hijmans et al 2005) at 5 arc-minute (~10km) spatial grain as the current climate baseline
averaged over the period 1950-2000. They assessed future change simulated by each GCM by calculating the difference
(or ratio) between historical and future conditions projected by the climate models thus creating anomalies. Each monthly
climate variable was averaged for 20 years of GCM simulation, supporting time series analyses from 2000 through 2099. Seasonal
climate variables were generated by averaging values for three months (ex. winter conditions correspond to the average climate
for </span>December, January and February<span style="">). Two sets of future climate projections are available, corresponding
to either the regional economic A2 or the global environmental and equitable B1 greenhouse gas emissions scenarios. Every
spatial climate data layer has a corresponding layer representing the standard deviation across time and GCMs, which gives
an estimate of the variability of the climate during the 20 years and across the various GCMs (16 or 6) used to calculate
the average. The final dataset includes 128 spatial climate layers, and their corresponding standard deviations (another 128
files) at a 10km spatial grain for the terrestrial fraction of the globe.</span></p> <br /> <br /> Related datasets and documentation
can be found in the Databasin gallery at: http://app.databasin.org/app/pages/galleryPage.jsp?id=2a47360040364876b37a52657793faa6
Citation
Title Standard deviation for fall maximum temperature (Celsius), 2060-2079, 6 GCMs, B1 emission scenario