Summer temperatures across northern North America: Regional reconstructions from 1760 using tree-ring densities

Data and Code

• 94_Canada.tar.gz contains all the files necessary to run the transfer function and reconstruction

Transfer function

The following table shows the relevant configuration file for the calibration/verification combinations:

Alayuk

configuration file	calibration	verification
opsk202.dat opsk201.dat opsk203.dat	1901-1940 1941-1983 1901-1983	1941-1983 1901-1940 -----

Tree chronology file: canalas.mxd

Climate data file: nhalaska.dat

To execute the transfer function run: run_recon_canalas_CH.sh

Mackeva

configuration file	calibration	verification
opsk212.dat opsk211.dat opsk213.dat	1901-1940 1941-1988 1901-1988	1941-1988 1901-1940 -----

Tree chronology file: canmack.mxd

Climate data file: nhmacken.dat

To execute the transfer function run: run_recon_canmack_CH.sh

Quebla

configuration file	calibration	verification
opsk234.dat opsk233.dat opsk235.dat	1901-1940 1941-1988 1901-1988	1941-1988 1901-1940 -----

Tree chronology file: canqueb.mxd

Climate data file: nhquebec.dat

To execute the transfer function run: run_recon_canqueb_CH.sh

For Alayuk and Quebla the above configuration reproduces the results in Table 2, Mackeva has some small discrepancies.

Reconstruction

To execute the reconstruction run:

run_recon_canalas.sh which picks up the coefficients file (coeffsk203.dat) and the parameters file (osrrecon203.par).

run_recon_canmack.sh which picks up the coefficients file (coeffsk213.dat) and the parameters file (osrrecon213.par).

run_recon_canqueb.sh which picks up the coefficients file (coeffsk235.dat) and the parameters file (osrrecon235.par).

The executable used is reconnorm_canada (compiled from reconnorm_canada.for - in this case an unmodified reconnorm.for).

The normalised output from the above (osrrecon203.dat, osrrecon213.dat and osrrecon235.dat) matches the original output (osrrecon203_ORIGINAL.dat, osrrecon213_ORIGINAL.dat and osrrecon235_ORIGINAL.dat).

The three time series (osrrecon_ts203.dat, osrrecon_ts213.dat and osrrecon_ts235.dat) output visually match the plots in Figure 4.