Satellite Data Show That CO2 Has Almost No Effect on Global Warming

By Jonathon DuHammel – The “pause” in global warming has reached a milestone of 17 years with no net warming. This has been very inconvenient for “warmist” scientists and policy makers. There have been many excuses proffered to explain the pause (See: “The ocean ate my global warming below”). And, there have been more scare stories in the media (See: “Risky Business debunked” below).

Back in 2011, a study by a group of pro-catastrophic global warming scientists (CAGW) determined that the human CO2 warming influence on atmospheric temperatures would become obvious over a period of 17 years of satellite measurements. The paper is Santer et al., 2011, Separating signal and noise in atmospheric temperature changes: The importance of timescale, Journal of Geophysical Research (abstract here). The bottom line of the abstract says: “Our results show that temperature records of at least 17 years in length are required for identifying human effects on global-mean tropospheric temperature.”

As of June, 2014, it has been 17 years since the super El Nino of 1997/1998 and there is no obvious signal that increasing CO2 emissions have had any effect on global lower troposphere temperatures. In fact, over the last 17 years, temperatures show a slight cooling trend. See this article and graph from C3Headlines (that graph uses RSS satellite data). See also the latest data from UAH satellites courtesy of Dr. Roy Spencer here. There is some slight difference between RSS and UAH satellite data as explained by Spencer here. Another C3Headlines article shows that “NOAA Confirms: Huge CO2 Emissions Have Zero Impact On U.S. Maximum Temperatures.” (Link)

Once again we come back to a basic fact about global warming alarmism: There is no physical evidence supporting the contention that CO2 emissions play a significant role in driving global temperatures. Such a role for CO2 exists only in computer models.

Fun with graphs:

NOAA maintains a website called “Climate at a glance” where you can construct your own graphs of temperature data. I played with it a bit.

Here are graphs for average July temperatures and maximum July temperatures for the contiguous US from 1895-2013. No sign of CO2 influence:

global warming

 

global warming

We can also play with precipitation data. Below I plot Arizona precipitation for January and July, our two rainy seasons. We see quite a bit of variation but no trend:

global warming

 

global warming

In a separate article, Anthony Watts points out some problems with global precipitation records. According to a recent paper published in Atmospheric Science Letters, global precipitation has either decreased, increased, or not changed over the past 30 years, depending upon which of three global datasets are examined. Thus, the actual trend of global precipitation, if any, remains a mystery. (read full post).

Note: Satellites do not measure temperature directly. Instead, they measure the radiance of oxygen, in several wavelengths, which is proportional to temperature.

See also:
The ocean ate my global warming – part 1
The ocean ate my global warming – part 2

Editor’s Note: reposted from Wry Heat Blog with the author’s permission – original link.

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Jonathon DuHammel climate change climate denierJohathon DuHammel is a retired economic geologist and worked as an explorationist in search of economic mineral deposits, mainly copper, molybdenum, and gold. His exploration activities have been mainly in the Western U.S. including Alaska. He has also worked in Mexico, South Africa, Ireland, and Scotland.

Exploration geologists are trained not only in the geologic sciences, but also in chemistry, physics, botany, and geostatistics. He is also trained in the natural history of the Sonoran Desert.

After graduating from The Colorado School of Mines with a Geology Engineering degree and Master of Science degree, and before practicing as a geologist, Johathon served as an officer in the Army Chemical Corps assigned to a unit that tested experimental weapons and equipment.

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Discuss: “Satellite Data Show That CO2 Has Almost No Effect on Global Warming”

  1. July 13, 2014 at 12:58 am #

    This agrees with other studies such as http://someitemshave.blogspot.in/2014/04/a-new-perspective-on-climate-change.html and the link of this article has been included therein.

  2. July 13, 2014 at 1:01 am #

    This agrees with the earlier study described here http://someitemshave.blogspot.in/2014/04/a-new-perspective-on-climate-change.html The link to this article is now included there.

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