This is a combination of two posts elsewhere that illustrate just how much hype and how little substance the MSM and blogs like Grist, Climate Progress. and Capital Weather Gang have been pushing trying to make a run of the mill summer heat wave seem like an event of unprecedented global warming proportions. It isn’t, and not even close compared to weather records history of the past.
Spread these far and wide, anywhere the hype manifests itself.
First from the Real-Science blog, an analysis of the 3000 new high temperature records set that gets touted by the shrill alarmists as if this never happened before and is a direct consequence of CO2 in the atmosphere. It isn’t according to the data:
There have been 372,989 correctly recorded daily high temperature records in the US since 1895. 84% of them were set when CO2 was below 350ppm.
Compare the number of record highs in the 1930s to the past decade. You can see that the 1930s were consistently much hotter.
Bear in mind, that since the 1930′s, when the majority of America (and weather stations) were rural, we now have many more large cities and many weather stations compromised (~90% of USHCN stations in Category 3,4,5 from Fall et al) by affected by urbanization encroachment.
Next up, a much broader analysis from Joe D’Aleo of WeatherBell via ICECAP:
By Joseph D’Aleo, CCM, AMS Fellow
Following the super La Nina of 2010/11, we had a period of extremes – snow and cold to start, then floods and drought, tornadoes and heat and a landfalling hurricane.
As the La Nina faded but the eastern and northern Pacific water remained cold, a warm and dry winter followed in 2011/12 much as the warm winter of 1918/19 followed the super La Nina of 1917/18 which was the only colder, snowier La Nina this century.
The warmth peaked in March. With the exception of the Pacific Northwest, most of the nation was well above normal with many daily record highs. Warmest March in the record books for the lower 48.
The warmth has continued but gradually subsided since then.
Despite the high number of record daily highs, this is a US centric warm event. The NCEP CFSv2 global anomalies from the winter through early June have been much of the time below the 1981-2010 average. The deep Eurasian cold wave shows in late January.
Looking back over the last century, you can explain global temperatures by ENSO and volcanism and the ocean multidecadal cycles that favor a particular ENSO state. Here is the plot since 1979 of all data sets with ENSO and volcanism indicated.
El Ninos bring a short term warming, La Ninas a dip in global temperatures. The warm mode of the Pacific from 1977 to 1998, led to a net warming. Major volcanoes produce a cooling as we saw in the early 1980s and early 1990s, lack of volcanism (like we have seen since the middle 1990s) means more solar radiation at the surface and enhanced warming.
In 1995, the Atlantic went into its warm mode, which means a warmer annual temperature in the Northern Hemisphere.
May for the US was warm again making the last year in the US allegedly the warmest in the record, but as John Christy of UAH noted from the satellite perspective, it was notable only in the lower 48 (see).
Again in the Pacific Northwest, it actually was colder than the 30 year mean for the fifth straight year.
•Spring temperatures across the Northwest Region have been trending downward at a rate of 0.59 degrees F per decade during the 30 years since 1983.
•Spring temperatures across the Northwest Region have been trending downward at a rate of 4.10 degrees F per decade during the 10 years since 2003.
A Cold west usually translates to warmth further east as we saw in the 2010 and 2011 summers.
As hot as it has been the past two summers, the heat is not cracking all-time levels. Here is the latest decadal plot of all-time records for the 50 states. When multiple years are tied, the latest year/decade is used.
The 1930s stands out as the hottest decade, the 1910s and 1950s were second, 1990s third and 1980s fourth. This decade doesn’t rank although it is early.
All time cold records look like this.
New York City reached 100F last summer, but that was common from the 1930s to 1950s.
Oh by the way see how the 100 degree days compares with CO2.
Here is Des Moines which has seen fewer and fewer 100F days in recent decades.
As Steve Goddard reports “During the 1930s, 100 degree days were very common in Des Moines. They very rarely happen any more. It has been nine years since Des Moines hit 100F. By contrast, 1934 had thirty-one days over 100 – including five days over 110 and three days over 112.”
The state monthly records through the end of the 2009.. This depicts the 12 monthly records for the 50 states (600 data points). There were likely March heat records set in some states and perhaps some other months so the 2010s will show and take away from some prior years.
See Bruce Hall’s 2010 guest post on Roger Pielke Sr.’s Climate Science here.
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