Global Warming Science - www.appinsys.com/GlobalWarming

United States, July 2010

[last update: 2010/09/02]

July was apparently quite warm in the United States, as shown below (although record low highs were being set on parts of the west coast).

[http://www.ncdc.noaa.gov/oa/climate/research/cag3/cag3.html]

The alarmists would have us believe that this hot July 2010 is due to global warming. An examination of regional trends in the US follows. Temperature graphs below show July average temperatures from http://www.ncdc.noaa.gov/oa/climate/research/cag3/regional.html.

(Note: the NCDC temperature graphs below do not show statistical significance on the trends. Most of the regional trends are not statistically significant.)

Northeast

July 2010 – 3.1 degrees above average - a hot summer within no warming trend.

Southeast

July 2010 – 2.4 degrees above average - a hot summer within no warming trend.

Central

July 2010 – 1.9 degrees above average - a normal  summer within no warming trend.

East North Central

July 2010 – 1.6 degrees above average - a normal summer within no warming trend.

South

July 2010 – exactly average - a normal summer within no warming trend.

West North Central

July 2010 – 0.6 degrees cooler than average - a normal summer within no significant warming trend.

Northwest

July 2010 – 0.3 degrees cooler than average - a normal summer within a slight warming trend.

Southwest

July 2010 – 1.7 degrees warmer than average - a warm summer within a slight warming trend.

West

July 2010 – 1.5 degrees warmer than average - a warm summer within a slight warming trend.

The “West” region contains California and Nevada – which have distinctly different trends as shown below. CA has no warming trend (left), while NV has warming over the last 10 years (right) although the hottest NV July was 1931.

Conclusion

July 2010 was only hot in the regions that have no warming trend. It was normal in most regions in the US.

No evidence of July 2010 in the US being part of any global warming trend.