Climatic Research Unit : Papers

Unusual twentieth-century summer warmth in a 1,000-year temperature record from Siberia

Briffa, KR, Jones, PD, Schweingruber, FH, Shiyatov, SG and Cook, ER (1995)

See also

  1. In 2005, a comment was submitted to Nature questioning the dating of the early part of the Polar Urals chronologies. The editor of Nature chose not to publish this comment nor our response. Our response is available here:

  2. This work has been superseded by our new study, Briffa et al. (2013).

Data and computer programs

Transfer function

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

configuration file

calibration

verification

opsk121.dat

opsk122.dat

opsk123.dat

1882-1935

1936-1990

1882-1990

1936-1990

1882-1935

-----


Tree chronology file: polarcomb.dat

Climate data file: nhurals.dat

To execute the transfer function run: run_tural_CH.com

The above configuration reproduces the regression weights in Table 2 for the three variants.

Reconstruction

To execute the reconstruction run: run_recon_polar.sh which picks up the coefficients file (coeffsk123.dat) and the parameters file (osrrecon123.par). The executable used is reconnorm_polar (compiled from reconnorm_polar.for - a modified reconnorm.for that provides denormalised output).

The time series (osrrecon_ts123.dat) output matches the 'Warmest' and 'Coldest' figures given in Table 2.

Amendment record