The average global surface temperature in 2005 is currently 0,48 ° C positive anomaly compared to the normal calculated for the period 1961-1990 (14 ° C), based on records from Members of the Organization. World Meteorological (WMO).
To date, 2005 is the second warmest year since 1861, when records began, and it is likely that this year will be one of the four warmest years known to mankind since then, but the official figures will not be released until February. The record is still held by 1998, when, according to precise estimates, the global surface temperature was 0,54 ° C higher than the average for this same period. The uncertainty about the global average temperature, which mainly stems from gaps in the observational network, is such that 2005 could be the hottest year but could also be the eighth hottest year since the beginning. statements. With the exception of 1996, the last ten years (1996-2005) have been among the hottest years on record.