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Tags aig , ice cores , icr

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Old 23rd June 2012, 07:03 AM   #1
UnrepentantSinner
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Creationist Ice Core/isotope claim - a little help

Do we we have any atomospheric scientists here, or people familiar enough with ice cores to discern the scientific facts about isotopes from Creationist BS? Here's snippets of a discussion from Facebook link to group - must join to participate.

Quote:
Ice core dating assumes one year per layer, and a layer defined as a change in chemical signatures such as oxygen ratio. But the same thing happens when you compare snow/ice deposits close to open water and inland: you get the same change in ratios. Therefore, if there was a big storm which left the ocean close to the shore covered for a few days or longer, the storm that left that snow would show a change in ratios. Therefore each layer could well be the marker for a storm, and since multiple storms per year are not unheard of even today, it is illogical and dogmatic to claim these markers must be annual indicators.
My request for evidence resulted in 3 sources, two Crationist and one scholarly.

http://www.answersingenesis.org/arti...housands-years
Quote:
Since the creationist model postulates an annual layer thickness significantly thicker, say 12 inches (30 cm) as an example, the uniformitarians have taken more measurements than needed and are, therefore, measuring multiple cycles of oxygen isotopes within one year. This is how the number of annual layers becomes greatly exaggerated.6
Footnote 6 takes you to an ICR article availible here:
http://www.icr.org/article/are-polar...500-years-old/
Quote:
These sub-annual signatures may be the result of individual storms, or they could be cycles of sunny, mild weather alternating with cool, stormy weather. These sub-annual layers can mimic annual layers in the measured variables. For instance, enough variability exists in the precipitation from some mid-latitude storms to account for the annual amplitude of the oxygen isotope ratio.10
Footnote 10 then takes us to this scholarly article that primarily discusses hydrogen/deuterium ratios in snow/rain fall in the mid-lattitudes rather than snowfall in artic lattitudes, but does mention the O16/O18 ratios a few times.
http://journals.ametsoc.org/doi/pdf/...P%3E2.0.CO%3B2

Can anyone help me out with this?
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Old 23rd June 2012, 07:16 AM   #2
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ice cores get comapred to ice cores from other loacations to rule out local influences that might confuse the interpretation of layers.
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Old 23rd June 2012, 07:24 AM   #3
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Yeah they just don't go around pointing at things saying...oh this is this and that. They have to be calibrated, then the calibration is peer reviewed. I am only guessing but I would suggest someone thought about how 'big storms' could affect the results
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Old 23rd June 2012, 07:32 AM   #4
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Originally Posted by DC View Post
ice cores get comapred to ice cores from other loacations to rule out local influences that might confuse the interpretation of layers.
Originally Posted by MG1962 View Post
Yeah they just don't go around pointing at things saying...oh this is this and that. They have to be calibrated, then the calibration is peer reviewed. I am only guessing but I would suggest someone thought about how 'big storms' could affect the results
I know guys, I know. I'm looking for something specific that gets to the heart of the paper in the last link and relates it back to the "claims" in the ICR and AiG page though.
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Old 23rd June 2012, 08:00 AM   #5
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Originally Posted by UnrepentantSinner View Post
I know guys, I know. I'm looking for something specific that gets to the heart of the paper in the last link and relates it back to the "claims" in the ICR and AiG page though.
Okay well I am having dinner tonight or tomorrow with some who has just completed a similar project, measuring snow depth from space using radar. I will ask about the calibration process
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Old 23rd June 2012, 08:08 AM   #6
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Originally Posted by MG1962 View Post
Okay well I am having dinner tonight or tomorrow with some who has just completed a similar project, measuring snow depth from space using radar. I will ask about the calibration process
Thank you sir.
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Old 23rd June 2012, 08:24 AM   #7
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Originally Posted by UnrepentantSinner View Post
Thank you sir.
Well with the radar survey I know they spent two years with people running all over Alaska measuring their results to make sure they were calibrated before they even started taking serious measurements.

With the cores. I can only imagine how long that all took to get right.
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Old 24th June 2012, 07:18 PM   #8
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Okay here is how it works. They use the same concept as geological strata. They take cores from various areas and look for common reference points. This means that if one core shows indications of unusual thickness or not matching the other cores this data is rejected

The point is, if a storm affected an area as the creationists suggest, it not likely that all ice cores over hundreds of miles will have been affected by the same storm.

Finally he mentioned that when researchers can not calibrate the ice core they say so in their research and introduce possible dating errors based on compression rates etc
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Old 24th June 2012, 07:24 PM   #9
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Originally Posted by MG1962 View Post
The point is, if a storm affected an area as the creationists suggest, it not likely that all ice cores over hundreds of miles will have been affected by the same storm.
But that's only true if you reject the theory of global storms and Creationists have not rejected the idea of global storms.

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Antarctic ice cores go back 740,000 years. So the Creations believe that there were 128 storms a year for the past 6000 years. And somehow Noah's Flood didn't show up anywhere in the young-earth ice cores. That must have been one magical flood.
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Last edited by Ladewig; 24th June 2012 at 07:32 PM.
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Old 24th June 2012, 07:27 PM   #10
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Originally Posted by UnrepentantSinner View Post
Do we we have any atomospheric scientists here, or people familiar enough with ice cores to discern the scientific facts about isotopes from Creationist BS? Here's snippets of a discussion from Facebook link to group - must join to participate.



My request for evidence resulted in 3 sources, two Crationist and one scholarly.

http://www.answersingenesis.org/arti...housands-years


Footnote 6 takes you to an ICR article availible here:
http://www.icr.org/article/are-polar...500-years-old/


Footnote 10 then takes us to this scholarly article that primarily discusses hydrogen/deuterium ratios in snow/rain fall in the mid-lattitudes rather than snowfall in artic lattitudes, but does mention the O16/O18 ratios a few times.
http://journals.ametsoc.org/doi/pdf/...P%3E2.0.CO%3B2

Can anyone help me out with this?

Does this page help?
http://westerngeologist.blogspot.com...-of-earth.html
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Old 25th June 2012, 09:20 AM   #11
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The layers in an ice core are also easily visible in some cases. The layers aren't determined (exclusively anyway) by isotopes. If you look at the ice core wiki there is a photo of a core with very clear layers.
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Old 25th June 2012, 04:56 PM   #12
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Is it possible that Adam and Eve went skating?
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Old 26th June 2012, 09:11 PM   #13
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Originally Posted by MG1962 View Post
Okay here is how it works. They use the same concept as geological strata. They take cores from various areas and look for common reference points. This means that if one core shows indications of unusual thickness or not matching the other cores this data is rejected

The point is, if a storm affected an area as the creationists suggest, it not likely that all ice cores over hundreds of miles will have been affected by the same storm.

Finally he mentioned that when researchers can not calibrate the ice core they say so in their research and introduce possible dating errors based on compression rates etc
Awesome. The folks in that thread didn't seem to want to respond after I actually took a look at the article and made my observations that it primarily dealt with hydrogen/deuterium ratios and how it didn't specifically address O16/18 ratios in artic environments. I'll keep his comments in mind should I see someone offering up that AiG/ICR propaganda in the future.

Originally Posted by Ladewig View Post
Sure did. I actually found that earlier in the night of the OP when I was responding to Lost Squadron claims. That's a great article full of lots of debunking for Creationists nonsense.
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