|April 16, 2010|
Tomorrow's Weather - Warm and Getting Warmer
|The first decade of the new millennium was the warmest on record
according to the United Nations weather monitoring agency the
World Meteorological Organization (WMO).
"The decade of the 2000s was warmer than the decade of the 1990s, which in turn was warmer than the 1980s," said Omar Baddour, Chief of the Data Management Application Divisions at WMO.
The new findings are part of the WMO Statement on the Status of the Global Climate, an annual survey by the agency about the weather and climate change.
The decade between 2000 and 2009 included one of the warmest years on record - last year, which was the fifth hottest year since records began.
"The current nominal ranking of 2009 places it as the fifth-warmest year since the beginning of instrumental climate records [in 1850]," Mr. Baddour said yesterday.
Last year also brought extreme weather, ranging from devastating droughts to severe floods, extreme heat waves and cold waves, in many parts of the world, according to the newly released WMO Statement on the Status of the Global Climate.
The Southern Hemisphere was particularly warmer than the long-term average, while the Northern Hemisphere cooled at the end of 2009 with heavy snowfall in Europe, North America and northern Asia.
Why are Anomolies Important?
In climate change studies, temperature anomalies are more important than absolute temperature.
A temperature anomaly is the difference from an average, or baseline, temperature. The baseline temperature is typically computed by averaging 30 or more years of temperature data.
A positive anomaly indicates the observed temperature was warmer than the baseline, while a negative anomaly indicates the observed temperature was cooler than the baseline.Source: www.un.org