Posted By Marc Morano – 9:51 AM EST – Marc_Morano@EPW.Senate.Gov


  Cooling Underway: Global Temperature Continues to Drop in May 

'Significantly Colder' - 16-month temperature drop of -0.774°C! 

Global temperatures continued to slide in May 2008.  Meteorologist Anthony Watts details the cooling temperatures in a report titled “Global Temperature Dives in May.” The new global temperature data reveals a whopping three quarters of a degree Celsius drop in temperatures since January 2007. Watts reported late yesterday that the cooling is “equal in magnitude to the generally agreed upon ‘global warming signal’ of the last 100 years.”


“Confirming what many of us have already noted from the anecdotal evidence coming in of a much cooler than normal May, such as late spring snows as far south as Arizona, extended skiing in Colorado, and delays in snow cover melting in many parts of the northern hemisphere, the University of Alabama, Huntsville (UAH), published their satellite-derived Advanced Microwave Sounder Unit data set of the Lower Troposphere for May 2008,” Watts reported on June 3. 


“It is significantly colder globally, colder even than the significant drop to -0.046°C seen in January 2008,” Watts explained. (The updated global temperature chart is here )


“But even more impressive is the change since the last big peak in global temperature in January 2007 at 0.594°C, giving a 16 month change in temperature of -0.774°C which is equal in magnitude to the generally agreed upon ‘global warming signal’ of the last 100 years,” he added. [Note: MIT Climate Scientist Dr. Richard Lindzen’s March 2008 presentation of data from the Hadley Centre of the UK Met Office found the Earth has had “no statistically significant warming since 1995.” (LINK) An April 2008 peer-reviewed study found "global warming will stop." - LINK ]


Climatologist Dr. Roy Spencer, formerly of NASA and currently principal research scientist at the University of Alabama in Huntsville, commented on the new data.  “If you exclude the anomalous 1992 cooling from the Pinatubo volcano eruption, it’s the coolest May in 20 years,” Spencer said.

Physicist Dr. Lubos Motl, formerly of Harvard University, also reacted to the new temperature data. “The global anomaly was -0.17 °C, the coldest reading after January 2000 and the third coldest monthly figure after September 1993. Yes, I mean that anomaly-wise, May was even colder than all the cool months of 2008, despite the dramatically weakening La Nina that now seems likely to change to ENSO neutral conditions this month. For example, the month-on-month cooling from April 2008 was by 0.19 °C while May 2008 was more than 0.75 °C cooler than January 2007. The average anomaly for the first five months of 2008 is negative. 1994 was the last year whose average annual anomaly was negative,” Motl wrote on June 4. (LINK)

“The Sun has been spotless at least for 9 days. The standardized May sunspot number was 2.9, equal to April, and the solar flux was even slightly lower than in April, namely 68.4,” Motl wrote. [Note: Even the bees are struggling with colder temperatures. See: "Bees' pollination work stung by cool temps in Michigan" (6-3-08) – Excerpt: The unusually cold May climate, filled with frost warnings and nights dipping into the upper 20s and low 30s, has been preventing some bees from pollinating. - LINK ]

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Related Links:  

'Global Warming Will Stop,' New Peer-Reviewed Study Says – April 30, 2008  

Global COOLING Currently Under Way – February 27, 2008  

U.S Army Chief Scientist Says Sun, Not Man, Is Causing Climate Change – June 3, 2008 

National Post: Global Cooling! 'Spotless Sun' prompts scientists to fear 'dramatic turn for the worse' – May 31, 2008 

U.S. Senate Minority Report: “Over 400 Prominent Scientists Disputed Man-Made Global Warming Claims in 2007”  

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