Hansen et al. 2002
, , , and , 2002: Global warming continues. Science, 295, 275, doi:10.1126/science.295.5553.275c.
The 2001 meteorological year (December-November) had the second warmest global surface temperature in more than a century of instrumental data. Calendar year 2001 will also be the second warmest year on record, as the 11-month temperature anomaly exceeds that in the next warmest years (1990 and 1995) by almost 0.1°C. Our analysis uses recently documented procedures for data over land and for sea surface temperatures.