Confirmation of AGW

Discussion in 'Environment' started by Old Rocks, Mar 8, 2013.

  1. Old Rocks
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    Old Rocks Diamond Member

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    Global temperatures are close to 11,000-year peak : Nature News & Comment

    Sid Perkins

    07 March 2013

    Global average temperatures are now higher than they have been for about 75% of the past 11,300 years, a study suggests. And if climate models are any indication, by the end of this century they will be the highest ever since the end of the most recent ice age.

    Instrumental records of climate extend back to only the late nineteenth century. Beyond that, scientists depend on analyses of natural chronicles such as tree rings and isotope ratios in cave formations.

    But even these archives have their limits: many detailed reconstructions of climate, particularly of temperature, apply to only limited regions or extend back at most a couple of millennia, says Shaun Marcott, a climate scientist at Oregon State University in Corvallis.

    Marcott and his colleagues set about reconstructing global climate trends all the way back to 11,300 years ago, when the Northern Hemisphere was emerging from the most recent ice age. To do so, they collected and analysed data gathered by other teams. The 73 overlapping climate records that they considered included sediment cores drilled from lake bottoms and sea floors around the world, along with a handful of ice cores collected in Antarctica and Greenland.

    More confirmation of the unnatural nature of the recent global warming.
     
  2. Old Rocks
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    Old Rocks Diamond Member

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    Global temperature rise is fastest in at least 11,000 years, study says - CSMonitor.com

    "To our knowledge, based on this reconstruction, the rate of change today is unprecedented" in the Holocene, says Shaun Marcott, an atmospheric scientist at Oregon State University who led a team formally reporting the results in Friday's issue of the journal Science. Indeed, it may be unprecedented in the past 22,000 years, he adds, when previous paleoclimate research he and his colleagues have conducted is taken into account.

    Other researchers have focused on the Holocene as well, notably Michael Mann, a Penn State University climatologist, and his colleagues. But their reconstructions have taken the record back only about 1,500 years.

    The new work, using different thermometer stand-ins, or proxies, not only reaches results similar to these previous efforts covering the recent past. It also accounts for natural variations in climate over longer time scales in ways that suggest rising temperatures will exceed the range of natural fluctuations. The long-term variations would include changes in Earth’s orbit, for instance.

    Based on the reconstructed temperatures records, natural variability over the study's time span accounts for roughly 1 degree C from coldest to warmest compared with the current climate, observes David Anderson, branch chief for the Paleoclimate Program in at the National Oceanic and Atmospheric Administration's National Climatic Data Center office in Boulder, Colo.

    "If you go grab the mount of warming expected just within the next 80 years, that's more like 3 degrees," says Dr. Anderson, who was not a member of the study team – three times the change one would expect from natural variability alone, and all in the warm direction.
     
  3. martybegan
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    martybegan Diamond Member

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    So instead of a few sets of unconfirmable, implied data, they collected a whole BUNCH of sets of unconfirmable, implied data.

    Do you remember the term GIGO?
     
  4. TheOldSchool
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    TheOldSchool BANNED

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    At least it's data. Deniers only argument is that data is not worth looking at.
     
  5. Old Rocks
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    Old Rocks Diamond Member

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    Uncomfirmable? Really? Care to explain your basis for that statement?

    GIGO. If you cannot adaquetely defend your statement, then that term is applicable to your statements. And judgements of the validity of your future statements.
     
  6. martybegan
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    martybegan Diamond Member

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    That is one of the most ignorant statements I have ever heard. Data is only as good as its reliability, espeicially so because THIS data is being used to support massive changes in the way we live our lives, and how government interacts with its citizens.

    The science isnt the problem. Its what people want to do with the science.
     
  7. martybegan
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    martybegan Diamond Member

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    Can you show me a logged, calibrated thermometer reading (or group of readings) for each of those data points going back 400,000 years?
     
  8. SSDD
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    SSDD Gold Member

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    You said confirmation of AGW. You haven't even confirmed that present temperatures are the highest ever (not even close by the way)...where is the proof there, or even strongly compelling evidence that man is the cause for the present temperatures?

    By the way, I looked for some indication of where either of those "studies" had been published. No mention of publishing or peer review. Self published opinion is what they looked like and about as much credential as they can claim.
     
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    Last edited: Mar 8, 2013
  9. Mad Scientist
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    Mad Scientist Feels Good!

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    Global Warming is good Banker scam! All money from Carbon Taxes go to IMF!

    Haha!

    I support 100%!
     
  10. skookerasbil
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    skookerasbil Platinum Member

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    and?
     

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