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Science & Technology

Nations try to hide global warming slowdown

September 22, 2013 | Comment icon 43 comments



Wind farms are one example of a 'green' solution to energy production. Image Credit: CC BY-SA 2.0 Chris Lim
Controversy surrounds many of the conclusions of the IPCC climate change report to be revealed on Friday.
The 2,000 page report is considered to be highly influential because it was will be used as a basis for UN negotiations on how global warming will be tackled. Co-authored by 257 scientists, the report is the first IPCC report in five years and is due to be released at the end of the week.

Controversy and bickering however has been taking place behind the scenes due to disagreements over some of the conclusions. One particular point of contention is that scientists have struggled to explain why global warming appears to have been slowing down since 1998, a fact that has been attributed to a combination of "natural variability", volcanic eruptions and solar activity.
Reports have emerged suggesting that some countries have even attempted to interfere with this aspect of the report with efforts to have references to the slowdown either removed or trivialized.

The claims have fueled concerns that the topic of climate change has become too political and that it is being used as an excuse by some nations to invest in expensive CO2 mitigation policies with ulterior motives.

Source: Telegraph | Comments (43)



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Recent comments on this story
Comment icon #34 Posted by highdesert50 8 years ago
It had taken all of human history until around the period of the industrial revolution in 1800 for world population to reach one billion. In the last two centuries, the world population has risen from one billion to over seven billion. One may argue the particulars, but it would be extremely naive to not believe in the gross environmental impact of humanity on this planet in light of the industrial revolution. That we all want to eat, procreate, live longer, be warm in the winter, and travel by fossil fuel is a given too, as are the inevitable environmental changes brought about by too many hu... [More]
Comment icon #35 Posted by Zerocoder 8 years ago
Good, because if they keep saying world is going down, then everyone will keep inventing greener methods of doing ****
Comment icon #36 Posted by MonkeyLove 8 years ago
"Global Warming Since 1997 Underestimated by Half" http://www.realclimate.org/index.php/archives/2013/11/global-warming-since-1997-underestimated-by-half/
Comment icon #37 Posted by Doug1029 8 years ago
The search for the causes of the "slowdown" seems to be settling on volcanic aerosols. This isn't good news because all the drivers of global warming remain in place, unaffected. Once the climate system clears the aerosols, warming is expected to return - with a vengeance. True, there are other things affecting the climate as well, such as a dip in solar output. But whether that is temporary or permanent remains to be seen and either way, warming will overcome the solar dip in a few years. At best, we seem to have been granted a reprieve. What we do with it will determine what we have to live ... [More]
Comment icon #38 Posted by MonkeyLove 8 years ago
"What ocean heating reveals about global warming" http://www.realclimate.org/index.php/archives/2013/09/what-ocean-heating-reveals-about-global-warming/
Comment icon #39 Posted by Doug1029 8 years ago
Just stumbled across an article that looks at the last millennium in in the northern hemisphere, essentially the same time interval examined by Mann et al. back in 1998. Results are similar to Mann's findings, but with a couple of differences: 1. Esper et al. found the Medieval Warm Period to be slightly warmer than did Mann. He also found the high temp (about 990 AD) to be a little more pronounced than Mann did. Since 1900 both chronologies are essentially identical. 2. Due to the slightly warmer MWP, Esper found that global temps have not quite reached the level they were in 990. The differe... [More]
Comment icon #40 Posted by MonkeyLove 8 years ago
There's a 2012 paper but it refers to Scandinavia: http://www.skepticalscience.com/news.php?n=1544
Comment icon #41 Posted by Doug1029 8 years ago
There's a 2012 paper but it refers to Scandinavia: http://www.skeptical...news.php?n=1544 Like you say; it's about Scandinavia. One problem with tree-ring chronologies is that they are heavily weighted in favor of the summer months. A two-degree change in summer temps shows up readily, but a ten-degree change in winter temps may be completely overlooked. From an ecological perspective, that doesn't matter as summer is when things are happening. Even down here in sunny Oklahoma, trees reflect very little of what happens in the way of temperatures between mid-October and early February. Beginnin... [More]
Comment icon #42 Posted by MonkeyLove 8 years ago
Like you say; it's about Scandinavia. One problem with tree-ring chronologies is that they are heavily weighted in favor of the summer months. A two-degree change in summer temps shows up readily, but a ten-degree change in winter temps may be completely overlooked. From an ecological perspective, that doesn't matter as summer is when things are happening. Even down here in sunny Oklahoma, trees reflect very little of what happens in the way of temperatures between mid-October and early February. Beginning in February, a severe freeze (11 degrees C.) will leave a narrow ring, but average temps... [More]
Comment icon #43 Posted by Doug1029 8 years ago
That is why multiple data sets need to be considered. For example, http://www.unexplain...30#entry4997859 There's also the NAS final report and others. I am also suspicious that rising CO2 levels may be confounding the warming signal in tree ring reconstructions. To test this, L-O-N-G datasets are needed, going back at least to 1800. Hopefully, I can test this in a year or two. Doug P.S.: Just re-read my previous post: that should be -11 degrees C., not +11 degrees C. Doug


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