The files contain 12 columns

1. Date, either year or year/month
2. Median global average sea-surface temperature anomaly (relative to 1961-1990)
3 and 4. define the lower and upper limits of the 95% confidence range associated with uncertainties of the bias adjustments
5 and 6. define the lower and upper limits of the 95% confidence range associated with uncertainties of measurement and sampling error.
7 and 8. define the lower and upper limits of the 95% confidence range associated with coverage uncertainties
9 and 10. define the lower and upper limits of the 95% confidence range associated with combined bias adjustment and measurement and sampling errors
11 and 12. define the lower and upper limits of the 95% confidence range associated with combined bias adjustment and measurement and sampling errors and coverage.