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These data form the basis for investigating the long term variability in the Earth's climate system for the past 1000 years.
correspondence of this simulation as mainly tied to the setting the solar
radiation, volcanic activity and carbon dioxide levels to the
estimates at these times. These external drivers of the climate system
are known as forcings. The annual series used for these simulations are
listed in text format in the files:
Original model output proived by Caspar Ammann and is in the moderately large (243Mb) netcdf file TREFHT.sd.b056.82.0850-1999.nc. Create.NAtemp.R is the R script used to process this original output file into an R data set format.
Load the fields library and the data set in R binary format:
Image plot of spring 850, the first time point ( timeNA is 850.25) with world map added.
image.plot( lonNA, latNA, NAtemp[,,1]) world ( add=TRUE)
Time series of first 125 years (500/4) for the grid box (25,10), the magenta point in the first figure.
plot( timeNA[1:500], NAtemp[25,10,1:500], type="l", xlab="years", ylab="temperature")