See ReadMe.txt for a text-only version of the information on this page.
All data are reported as monthly anomalies in degrees C.
The latitude and longitude for each of the 5509 columns in the following files are given in the files Tir_lats.txt and Tir_lons.txt.
cloudmaskedAVHRR.txt contains the monthly-averaged cloud-masked satellite data used in the reconstruction presented in the main text (and shown in Figures S1c and S1d). The 300 rows are months, starting with 1982 (January) at the top, and ending in 2006 (December) at the bottom.
ant_recon.txt contains the monthly-averaged data from the reconstruction presented in the main text. The 600 rows are months, starting with 1957 (January) at the top, and ending in 2006 (December) at the bottom.ant_recon_detrend.txt contains the monthly-averaged data from figure S4d in the Supplementary text. The 600 rows are months, starting with 1957 (January) at the top, and ending in 2006 (December) at the bottom.
ant_recon_pca.txt contains the monthly-averaged data from Figure S4c. The 600 rows are months, starting with 1957 (January) at the top, and ending in 2006 (December) at the bottom.
All data are reported as monthly anomalies in degrees C.
The file ant_recon_aws.txt contains the monthly-averaged data from Figure S3. The 600 rows are months, starting with 1957 (January) at the top, and ending in 2006 (December) at the bottom. The latitude and longitude for each of the 63 columns are given in the files aws_lats.txt and aws_lons.txt.
awsreconcorrected.txt is a correction to the above file, using corrected AWS data at two AWS stations. See the note under "Raw Data", below. The resulting differences in the reconstruction are too small to be discernable in Figure S3, or in the trends for individual stations given in Table S1 in the Supplementary Information that accompanies the paper in Nature. (Corrections for all stations in the Table S1 are in the third decimal place (that is <0.01 degrees C/decade)). The mean trend for Antarctica changes by less than 0.004 degrees C/decade. The mean trend for West Antarctica changes by less than 0.02 degrees C/decade. Note also there is a typo in Table S2. The correct coordinates for station 'Harry' are 83.0 S 238.6 E. Note that none of these corrections have any impact on the satellite-based reconstructions; no AWS data were used in those reconstructions.
All of the data used in the temperature reconstructions are from publically available data sources. Any queries about the raw data, or access to it, should be directed to the appropriate data centers, listed below.
Weather station data (both occupied and automatic weather
stations) from the British Antarctic survey:
www.antarctica.ac.uk/met/READER
Note that corrections have been
made to AWS stations "Harry" and "Racer Rock". See the READER web site
for details. A matrix of the READER ground
station monthly anomalies -- as used in the paper -- is given in
READER_groundstations.txt
This file is 600 months (starting in 1957) by 42 locations.
AVHRR thermal infrared data: www.nsidc.org/data/avhrr, ftp://eclipse.ncdc.noaa.gov/pub/OI-daily-v2