Global Temperature Report: May 2010

First five months of 2010 second warmest on record
Global climate trend since Nov. 16, 1978: +0.14 C per decade
May temperatures (preliminary)
Global composite temp.: +0.53 C (about 0.95 degrees Fahrenheit) above
20-year average for May.
Northern Hemisphere: +0.78 C (about 1.40 degrees Fahrenheit) above 20-year
average for May.
Southern Hemisphere: +0.29 C (about 0.52 degrees Fahrenheit) above 20-year
average for April.
Tropics: +0.71 C (about 1.28 degrees Fahrenheit) above 20-year average for
May.
April temperatures (revised):
Global Composite: +0.50 C above 20-year average
Northern Hemisphere: +0.80 C above 20-year average
Southern Hemisphere: +0.20 C above 20-year average
Tropics: +63 C above 20-year average
(All temperature anomalies are based on a 20-year average (1979-1998) for
the month reported.)
Notes on data released June 7, 2010:
In the race to …

Second warmest April on record is warmest month in the Arctic
Global climate trend since Nov. 16, 1978: +0.14 C per decade
April temperatures (preliminary)
Global composite temp.: +0.50 C (about 0.9 degrees Fahrenheit) above 20-year average for April.
Northern Hemisphere: +0.80 C (about 1.44 degrees Fahrenheit) above 20-year average for April.
Southern Hemisphere: +0.21 C (about 0.38 degrees Fahrenheit) above 20-year average for April.
Tropics: +0.63 C (about 1.34 degrees Fahrenheit) above 20-year average for April.
March temperatures (revised):
Global Composite: +0.66 C above 20-year average
Northern Hemisphere: +0.85 C above 20-year average
Southern Hemisphere: +0.46 C above 20-year average
Tropics: +73 C above 20-year average
(All temperature anomalies are based on a 20-year average (1979-1998) for the month reported.)
Notes on data released May 6, 2010:
The …

Global climate trend since Nov. 16, 1978: +0.13 C per decade
August temperatures (preliminary)
Global composite temp.: +0.23 C (about 0.41 degrees Fahrenheit) above 20-year average for August.
Northern Hemisphere: +0.28 C (about 0.50 degrees Fahrenheit) above 20-year average for August.
Southern Hemisphere: +0.18 C (about 0.32 degrees Fahrenheit) above 20-year average for August.
July temperatures (revised):
Global Composite: +0.41 C above 20-year average
Northern Hemisphere: +0.21 C above 20-year average
Southern Hemisphere: +0.61 C above 20-year average
(All temperature variations are based on a 20-year average (1979-1998) for the month reported.)
Notes on data released September 8, 2009:
The tropics continued to respond in August to warming caused by the El Niño Pacific Ocean warming event, with the average temperature in the tropics warming from …

Tasmania’s east coast is recording its highest-ever winter water temperatures of more than 13ºC – up to 1.5ºC above normal – due to a strengthening of an ocean current originating north of Australia.
Satellites have given oceanographers an insight into a remarkable phenomenon – a significant extension of the Leeuwin Current curling around the southern tip of Tasmania and reaching as far north as St Helens.
Remote sensing specialists at CSIRO’s Wealth from Oceans Flagship have been observing the current in recent days using satellite data, and ocean measurements made near Maria Island on Tasmania’s east coast.
“It’s important for us to monitor these changes in the ocean, as they can have consequences for marine ecosystems, fisheries, aquaculture, …

The global composite temperature during June 2009 was flat, according to figures from The University of Alabama in Huntsville. Northern Hemisphere experienced a slight increase — +0.03 C (about 0.05 degrees Fahrenheit) above 20-year average for June. Meanwhile, the Southern Hemisphere was cooler by the same amount — -0.03 C (about 0.05 degrees Fahrenheit) below 20-year average for June.
Global climate trend since Nov. 16, 1978: +0.12 C per decade
June temperatures (preliminary)
Global composite temp.: ±0.00 C (about 0.00 degrees Fahrenheit) above/below 20-year average for April.
Northern Hemisphere: +0.03 C (about 0.05 degrees Fahrenheit) above 20-year average for June.
Southern Hemisphere: -0.03 C (about 0.05 degrees Fahrenheit) below 20-year average for June.
May temperatures (revised):
Global Composite: +0.05 C above 20-year …