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From discussions here, on other boards, and with friends, it's pretty clear to me that a lot of people have heard about the so-called "climategate" scandal, but many people don't really understand the scope of the scandal or exactly what is involved, much less the effect this has on global warming theory. I decided I'd break down who was involved, what the allegations were, the evidence supporting those allegations, and what the aftermath was. I'll refer to the situation as "Climategate," although I freaking hate how the -gate suffix gets added to everything, but that's a rant for another thread.
What is Climategate? How did this come up?
In November 2009, a hacker managed to steal about a thousand emails and a few thousand other documents from an internet server used by the University of East Angalia's Climate Research Unit. These emails quickly spread around the internet and became the source of some allegations of serious misconduct on part of some of the scientists working there. The main targets were Phil Jones, the head of the CRU, and Michael Mann of PennState.
What are the allegations and what are they based on?
The emails themselves can be found here:
Climategate Document Database : Alleged CRU Email
So, the allegations are that the CRU and Michael Mann engaged in an effort to distort or alter data regarding global warming research so as to show that things are worse than they really are. It's worth noting that Michael Mann's "hockey stick" temperature reconstruction is just one of many done by scientists from across the globe. Even if you disregard his work entirely, you still end up with this:
File:1000 Year Temperature Comparison.png - Wikipedia, the free encyclopedia
Note that there are ten different temperature reconstructions here. Mann's is the medium-blue color.
The main focus is on two emails. I'll post them in their entirety for reference:
The Explanations
Trick:
Trick, on its face, does sound deceptive. However, deceit is not necessarily part of a "trick." In science, trick is used commonly to describe something neat, clever, or easy. "I found the trick to stopping my spray paint from running!" Want some proof?
http://www.accessecon.com/pubs/EB/2007/Volume3/EB-07C00003A.pdf
SpringerLink - Journal Article
Want more? Go to your favorite science journal and type in the search term "trick." It's everywhere. (I used Proceedings of the National Academy of Science)
Hide the Decline
Hide the decline? Omg! There's a decline in temperatures and these scientists want to cover it up!
One problem though. Global temperatures were not declining. They were going up! So what "decline" was being "hidden?" This series of emails, which the skeptics never bothered to chase down, is referring to one set of tree-ring temperature data that had a known deviation from the temperature record. It was a bad data set from the 1950's, the known temperature record proved it to be incorrect. The debate they were having was over whether or not tree-ring data could be considered reliable enough to be used for reconstructing temperatures. In any case, whether or not this is some sort of deception is fairly irrelevant, because it was one of many temperature datasets from the 1950's and the "decline" they were "hiding" was the data, not the actual temperature. Actual temperature was going up. Hardly evidence that global warming is a hoax.
"Travesty"
Another moment that shows that context is everything. If anybody had bothered to read the preceding emails or following emails, they'd see a couple other climatologists disagreeing. In 2008, temperatures were declining. We were at the end of the 11-year solar cycle, and had a La Nina year, both of which pushed temperatures down a bit. Kevin Trenberth, the writer of that email, was expressing his own opinion. Others disagreed. If you think there was some effort to hide this disagreement, you should understand that Kevin published his opinion:
ScienceDirect - Current Opinion in Environmental Sustainability : An imperative for climate change planning: tracking Earth's global energy
So, if he's trying to hide this whole deal, he's not doing a very good job! He even posted a link to this very paper in the very email he sent expressing this concern, I guess the climate skeptics going over these emails didn't bother to check such things.
Some of the other guys disagreeing:
Email - Re: BBC U-turn on climate
Solar output declining, starts back up in 2009/2010:
http://www.acrim.com/RESULTS/Earth Observatory/earth_obs_fig2.pdf
El Nino/La Nina cycle:
Climate Prediction Center - Monitoring & Data: ENSO Impacts on the U.S. - Previous Events (raw data, sorry. look down at 2007-2008 and you'll see the blue negative numbers)
Two of the natural forcings were pushing down that year. They temporarily overrode the overall trend of temperature increase. Of course, since solar activity and El Nino have already started cycling back up, we're seeing some new record temperatures this spring and summer. We'll probably see a lot of new records in 2010-2012.
But Deuce, why the hell should I listen to you?
Others seem to agree.
Factcheck.org calls the allegations "wide of the mark." They also note that the CRU is just one of many research groups globally and they are not the sole source of information for anything, especially the IPCC.
“Climategate” | FactCheck.org
PennState Clears Mann of wrongdoing:
http://www.research.psu.edu/orp/Findings_Mann_Inquiry.pdf
Investigation by University of East Angalia finds no wrongdoing:
http://www.uea.ac.uk/mac/comm/media/press/CRUstatements/Report of the Science Assessment Panel
UK Parliament finds that the emails have no bearing on our understanding of climate science:
House of Commons - The disclosure of climate data from the Climatic Research Unit at the University of East Anglia - Science and Technology Committee
General info:
Debunking Misinformation About Stolen Climate Emails in the "Climategate" Manufactured Controversy | Union of Concerned Scientists
What is Climategate? How did this come up?
In November 2009, a hacker managed to steal about a thousand emails and a few thousand other documents from an internet server used by the University of East Angalia's Climate Research Unit. These emails quickly spread around the internet and became the source of some allegations of serious misconduct on part of some of the scientists working there. The main targets were Phil Jones, the head of the CRU, and Michael Mann of PennState.
What are the allegations and what are they based on?
The emails themselves can be found here:
Climategate Document Database : Alleged CRU Email
So, the allegations are that the CRU and Michael Mann engaged in an effort to distort or alter data regarding global warming research so as to show that things are worse than they really are. It's worth noting that Michael Mann's "hockey stick" temperature reconstruction is just one of many done by scientists from across the globe. Even if you disregard his work entirely, you still end up with this:
File:1000 Year Temperature Comparison.png - Wikipedia, the free encyclopedia
Note that there are ten different temperature reconstructions here. Mann's is the medium-blue color.
The main focus is on two emails. I'll post them in their entirety for reference:
On the surface, the word "trick" and the phrase "hide the decline" seem to indicate some sort of subterfuge. The other email:Once Tim's got a diagram here we'll send that either later today or
first thing tomorrow.
I've just completed Mike's Nature trick of adding in the real temps
to each series for the last 20 years (ie from 1981 onwards) amd from
1961 for Keith's to hide the decline. Mike's series got the annual
land and marine values while the other two got April-Sept for NH land
N of 20N. The latter two are real for 1999, while the estimate for 1999
for NH combined is +0.44C wrt 61-90. The Global estimate for 1999 with
data through Oct is +0.35C cf. 0.57 for 1998.
Seems damning, kinda. Except people who quote this always leave out the last half:The fact is that we can't account for the lack of warming at
the moment and it is a travesty that we can't. The CERES data published in the August BAMS 09 supplement on 2008 shows there should be even more warming: but the data are surely wrong. Our observing system is inadequate. /global_ocean_monitoring_current.ppt.
PDO is Pacific Decadal Oscillation and ENSO is El Nino/Southern Oscillation.That said there is a LOT of nonsense about the PDO. People like CPC are tracking PDO on a monthly basis but it is highly correlated with ENSO. Most of what they are seeing is the change in ENSO not real PDO. It surely isn't decadal. The PDO is already reversing with the switch to El Nino. The PDO index became positive in September for first time since Sept 2007. see Index of /products/GODAS/ocean_briefing_gif
The Explanations
Trick:
Trick, on its face, does sound deceptive. However, deceit is not necessarily part of a "trick." In science, trick is used commonly to describe something neat, clever, or easy. "I found the trick to stopping my spray paint from running!" Want some proof?
http://www.accessecon.com/pubs/EB/2007/Volume3/EB-07C00003A.pdf
SpringerLink - Journal Article
Want more? Go to your favorite science journal and type in the search term "trick." It's everywhere. (I used Proceedings of the National Academy of Science)
Hide the Decline
Hide the decline? Omg! There's a decline in temperatures and these scientists want to cover it up!
One problem though. Global temperatures were not declining. They were going up! So what "decline" was being "hidden?" This series of emails, which the skeptics never bothered to chase down, is referring to one set of tree-ring temperature data that had a known deviation from the temperature record. It was a bad data set from the 1950's, the known temperature record proved it to be incorrect. The debate they were having was over whether or not tree-ring data could be considered reliable enough to be used for reconstructing temperatures. In any case, whether or not this is some sort of deception is fairly irrelevant, because it was one of many temperature datasets from the 1950's and the "decline" they were "hiding" was the data, not the actual temperature. Actual temperature was going up. Hardly evidence that global warming is a hoax.
"Travesty"
Another moment that shows that context is everything. If anybody had bothered to read the preceding emails or following emails, they'd see a couple other climatologists disagreeing. In 2008, temperatures were declining. We were at the end of the 11-year solar cycle, and had a La Nina year, both of which pushed temperatures down a bit. Kevin Trenberth, the writer of that email, was expressing his own opinion. Others disagreed. If you think there was some effort to hide this disagreement, you should understand that Kevin published his opinion:
ScienceDirect - Current Opinion in Environmental Sustainability : An imperative for climate change planning: tracking Earth's global energy
So, if he's trying to hide this whole deal, he's not doing a very good job! He even posted a link to this very paper in the very email he sent expressing this concern, I guess the climate skeptics going over these emails didn't bother to check such things.
Some of the other guys disagreeing:
Email - Re: BBC U-turn on climate
Solar output declining, starts back up in 2009/2010:
http://www.acrim.com/RESULTS/Earth Observatory/earth_obs_fig2.pdf
El Nino/La Nina cycle:
Climate Prediction Center - Monitoring & Data: ENSO Impacts on the U.S. - Previous Events (raw data, sorry. look down at 2007-2008 and you'll see the blue negative numbers)
Two of the natural forcings were pushing down that year. They temporarily overrode the overall trend of temperature increase. Of course, since solar activity and El Nino have already started cycling back up, we're seeing some new record temperatures this spring and summer. We'll probably see a lot of new records in 2010-2012.
But Deuce, why the hell should I listen to you?
Others seem to agree.
Factcheck.org calls the allegations "wide of the mark." They also note that the CRU is just one of many research groups globally and they are not the sole source of information for anything, especially the IPCC.
“Climategate” | FactCheck.org
PennState Clears Mann of wrongdoing:
http://www.research.psu.edu/orp/Findings_Mann_Inquiry.pdf
Investigation by University of East Angalia finds no wrongdoing:
http://www.uea.ac.uk/mac/comm/media/press/CRUstatements/Report of the Science Assessment Panel
UK Parliament finds that the emails have no bearing on our understanding of climate science:
House of Commons - The disclosure of climate data from the Climatic Research Unit at the University of East Anglia - Science and Technology Committee
General info:
Debunking Misinformation About Stolen Climate Emails in the "Climategate" Manufactured Controversy | Union of Concerned Scientists
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