J.C. Moore Online
Current Events from a Science Perspective

The Earth Hasn't Warmed in the Last "X" Years Myth

The title has an “X”, as the number of years varies from 10 to 16 depending on who said it and when. I first heard this myth from George Will when he was attacking John McCain’s stand on global warming during the 2008 presidential campaign. Mr. Will claimed that the Earth’s temperature had not gone up in the last 10 years. When I contacted him for an explanation, he said that it was because 1998 was hotter than any year after that. Strangely, Mr. Will referred to the data from the World Meteorological Organization rather than that from NASA. Mr. Will has no use for the UN, but his statement could only be true if he used the UN data which showed that 2005 was slightly cooler than 1998. NASA’s data shows that 2005 was slightly warmer than 1998, and also that 2007 and 2010 were warmer yet. It’s a little hard to explain how the Earth reached those higher temperatures without  going up, but logic and truth are mostly irrelevant to those who say this.

As the years have gone by, “X” has been increased accordingly and the erroneous statement has been repeated on Skeptic’s blogs, newspaper articles, letters to the editor, op-ed pieces, sites like Yahoo!Answers, and by politicians such as Sen. Inhofe. The number “X” is now up to 16 and when I put “no global warming in past 16 years” in Google’s search engine, I got 114 million hits. It’s a great propaganda piece as it is simple, easily understood, and reduces people’s worry about climate change. Unfortunately, it is very comforting, and very, very wrong. The propaganda has been funded, circulated, and promoted by those who do not want us to address global warming as they have an economic interest in the issue.

So what is the truth of the matter? There are number of natural and man-made factors that affect the temperature of the Earth. The main factors are the amount of solar radiation we receive, volcanic activity, greenhouse gases, and ocean circulations such as El Niño and La Niña. Man’s main contribution falls in the area of greenhouse gases. We are now emitting 30 billion tons of carbon dioxide each year, and the atmospheric concentration of carbon dioxide has gone up about 40% in the last century. That increase and the ensuing feedback loops are the main factors that can be attributed to man. Though there are other contributions, most of the CO2 increase has come from burning fossil fuels.

Probably the best way to see man’s influence on the Earth’s temperature is to subtract out the factors that can be attributed to natural sources and to see what is left. That was done very nicely by climate scientist John Cook in a video which he produced and posted on YouTube. It’s only 2 minutes long, but it shows how the Earth’s temperature has responded to the increasing burden of carbon dioxide in the atmosphere.



If the video doesn’t load, you may access it at: http://www.youtube.com/watch?feature=player_embedded&v=W705cOtOHJ4

Tags: , , , , , ,

No Responses to “The Earth Hasn't Warmed in the Last "X" Years Myth” »

  1. Rachel Says:

    Great post. I too get sick of the “no warming for x years” mantra. It’s so tiresome. I hadn’t seen that SKS video before but it was very good.

  2. admin Says:

    Thanks. I think John Cook may have overestimated the linearity a bit, but other than that, it is right on.

  3. PassFinal Says:

    Useful information. Fortunate me I discovered your site accidentally,
    and I’m stunned why this coincidence didn’t came about earlier!
    I bookmarked it.

  4. Forshorn Says:

    Curiously, this article doesn’t name either the source of the “myth” nor does it debunk the myth with evidence of warming over the past 10-16 years. Actually, climate scientists have accepted the hiatus to the extent that they have offered a variety of explanations for it – generally that heat is being stored in the oceans. You’ll find this theory in a magazine as respected as Nature: http://www.nature.com/news/climate-change-the-case-of-the-missing-heat-1.14525.

    Reiterating the idea that we can prove that warming is anthropogenic is simply dodging the issue and not really relevant to the subject of this article. Is the author of the impression that computer models have been successful in predicting the effect of factors like El Nino. The hiatus, whatever its implications, is widely accepted, and not just by those in the employ of energy companies. No computer model predicted it.

  5. J.C. Moore Says:

    You just stated the myth. What is your source?

    As this article points out,there are both man-made and natural factors which determine the temperature of the Earth. For a hiatus in the temperature to be meaningful, it has to be looked at over a longer period of time than 16 years. The concentration of carbon dioxide in the atmosphere is now around 400 Parts per million and the earth is retaining more heat that it is emitting, which means the earth is storing the heat somewhere. The scientific question is about where that heat is being stored if it is not warming the atmosphere.

Leave a Comment

This blog is kept spam free by WP-SpamFree.