Every month University of Alabama in Huntsville climatologists John Christy and Roy Spencer report the latest global temperature trends from satellite data. Below are the newest data updated through October, 2011.
Temperatures fall as La Niña sets up
Global Temperature Report: October 2011
Global climate trend since Nov. 16, 1978: +0.14 C per decade
October temperatures (preliminary)
Global composite temp.: +0.11 C (about 0.20 degrees Fahrenheit) above 30-year average for October.
Northern Hemisphere: +0.17 C (about 0.31 degrees Fahrenheit) above 30-year average for October.
Southern Hemisphere: +0.06 C (about 0.11 degrees Fahrenheit) above 30-year average for October.
Tropics: -0.06 C (about 0.11 degrees Fahrenheit) below 30-year average for October.
September temperatures (revised):
Global Composite: +0.29 C above 30-year average
Northern Hemisphere: +0.30 C above 30-year average
Southern Hemisphere: +0.27 C above 30-year average
Tropics: +0.18 C above 30-year average
(All temperature anomalies are based on a 30-year average (1981-2010) for the month reported.)
Notes on data released Nov. 4, 2011:
Temperatures in both hemispheres and the tropics dropped through October as a new La Niña Pacific Ocean cooling event strengthened in the ocean west of Ecuador, Peru and Colombia, according to Dr. John Christy, a professor of atmospheric science and director of the Earth System Science Center at The University of Alabama in Huntsville.
Go here for the monthly temperature datasets.