[ RadSafe ] BBC article: "Chernpobyl's legacy recorded in trees"

[Mohan Doss]

     Here are a few websites that show photos of tree rings changing color:

          
http://www.simplejoyfulliving.com/2012/12/discover-nature-tree-rings.html

          
http://phys.org/news/2012-05-ancient-tree-ring-southwest-today-megafires.html

          http://www.arborday.org/trees/ringsLivingForest.cfm

                                                  Mohan



Mohan Doss, Ph.D., MCCPM
Medical Physicist,
Associate Professor, Diagnostic Imaging,
Fox Chase Cancer Center, R427
333 Cottman Avenue,
Philadelphia, PA 19111-2497.
Phone: 215 214-1707
Fax:   215 728-4755
E-mail:  Mohan.Doss at fccc.edu


On 8/11/2013 10:13 PM, Jeremy Nicoll wrote:
> I wonder if this chap's cut down many trees?
>
> This appearance is not uncommon, certainly in the southern hemisphere, but we don't get much fallout.
>
> I can't explain it, but then I'm not a Health Botanist, or a forester for that matter.
>
> Jeremy
>
>
> -----Original Message-----
> From: radsafe-bounces at agni.phys.iit.edu [mailto:radsafe-bounces at agni.phys.iit.edu] On Behalf Of Brennan, Mike (DOH)
> Sent: Saturday, 10 August 2013 4:29 a.m.
> To: The International Radiation Protection (Health Physics) MailingList
> Subject: Re: [ RadSafe ] BBC article: "Chernpobyl's legacy recorded in trees"
>
> I certainly think this is a field worthy of future research.
>
> It would be interesting to find out what cause the color change, and if the growth rate before and after were significantly different.  I do admit to being a little skeptical that the color change is due to genetic mutation, as that would imply that a number of trees exposed to radiation had the same mutation triggered in all of the growing cells the entire length and completely around each tree.  From something as random as radiation, I would expect something less symmetric.
>
> The trees with the unusual growth patterns are more along the lines of what I would expect, though then it becomes a statistics game, as I have seen the occasional tree like that in areas not impacted by massive fallout.
>
> Still, interesting, and worthy of more work.
>
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Dimiter Popoff
> Sent: Friday, August 09, 2013 8:39 AM
> To: radsafe at health.phys.iit.edu
> Subject: Re: [ RadSafe ] BBC article: "Chernpobyl's legacy recorded in trees"
>
>> It'd be interesting to get a thin (1") or so slice across the trunk
>> and do an autoradiograph to see if there is distributed radioactive
>> material in the wood,
> Yes, and some spectra of samples at a few depths of interest would likely also be very telling.
>
> Dimiter
>
>> From: "Rees, Brian G"<brees at lanl.gov>
>> To:<radsafe at health.phys.iit.edu>
>> Date: Fri, 9 Aug 2013 15:21:44 +0000
>> Subject: Re: [ RadSafe ] BBC article: "Chernpobyl's legacy recorded in
> trees"
>> I remember that hair of people with high exposures grows back coarser,
>> and sometimes a slightly different color.  It sounds like it might be
> related.
>>    It'd be interesting to get a thin (1") or so slice across the trunk
>> and do an autoradiograph to see if there is distributed radioactive
>> material in the wood, or just at the "event horizon"....
>>
>> Brian Rees
>>
>> -----Original Message-----
>> From: radsafe-bounces at health.phys.iit.edu
>> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Dimiter
>> Popoff
>> Sent: Friday, August 09, 2013 10:01 AM
>> To: radsafe at health.phys.iit.edu
>> Subject: [ RadSafe ] BBC article: "Chernpobyl's legacy recorded in
> trees"
>> http://www.bbc.co.uk/news/science-environment-23619870
>>
>> The photo shows a distinct change of colour which as I get it matches
>> the accident date.
>> But it looks very distinct. I wonder how did they determine the cause
>> was radiation and not some chemistry thing, perhaps/probably also
>> related to the accident.
>>
>> Dimiter
>>
>>
>> ------------------------------------------------------
>> Dimiter Popoff               Transgalactic Instruments
>>
>> http://www.tgi-sci.com
>> ------------------------------------------------------
>> http://www.flickr.com/photos/didi_tgi/sets/72157600228621276/
>>
>>
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