[ RadSafe ] Climate change

[Brennan, Mike (DOH)]

Some years ago, at the request of an Astrophysicist PhD. friend of mine,
I did some rough calculations on the dose from a gamma ray burst 100
light years away.  I forget the details, but I remember it was pretty
obvious that pretty much everything on that side of the planet would
die, but the planet should provide adequate shielding for things on the
other side.  On the other hand, we had questions about how much of the
atmosphere would get blown off (the energy involved is amazing.  It
would glaze the Moon by melting the material on the surface.) 

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Dan McCarn
Sent: Tuesday, February 26, 2013 2:31 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] Climate change

Dear James:

Well, us geologists have to take the wider and longer point of view
about these sorts of things... after all, wasn't it only 10,000-15,000
years ago that we were coming-out of the last major glaciation?  And I
read somewhere that there is evidence of a gamma-ray burst that hit the
earth in early medieval times!  And I'm sure that you, just like me,
have seen evidence of past asteroid strikes - we just call them
"astroblemes".
http://en.wikipedia.org/wiki/Impact_structure

http://www.bbc.co.uk/news/science-environment-21082617

And after all, a few Krakatoa's and we'll be freezing all over again!

But in all seriousness, our atmosphere seems to be warming, but it has
since around 1800.  How much is caused by CO2 emissions  I don't really
know!


Dan ii

Dan W McCarn, Geologist
108 Sherwood Blvd
Los Alamos, NM 87544-3425
+1-505-672-2014 (Home - New Mexico)
+1-505-670-8123 (Mobile - New Mexico)
HotGreenChile at gmail.com (Private email) HotGreenChile at gmail dot com


On Tue, Feb 26, 2013 at 3:14 PM, Power, James
<jpower at appliedmedical.com>wrote:

> Dan - Always enjoy the very pragmatic "geologist's-take" on "climate 
> [fill in blank bs]." Makes me proud to be one...
>
>
>
> Jim Power
>
> Escondido, CA
>
>
>
>
>
> Message: 9
>
> Date: Mon, 25 Feb 2013 22:12:31 -0700
>
> From: Dan McCarn <hotgreenchile at gmail.com>
>
> Subject: Re: [ RadSafe ] Climate change
>
> To: "The International Radiation Protection (Health Physics) Mailing
>
>       List" <radsafe at health.phys.iit.edu>
>
> Message-ID:
>
>       
> <CAD=JBaxS2Yhxpsc8BOUAjM_LtYE811q=SS69ZmySG8Q2gfqfPA at mail.gmail.com>
>
> Content-Type: text/plain; charset=windows-1252
>
>
>
> Jerry, there is a 4th possibility:
>
>
>
> Earth gets hit by a catastrophic event that burns most of the 
> atmosphere
>
> off.  I was thinking gamma-ray burst or a large asteroid.
>
>
>
> Then it really won't matter!
>
>
>
>
>
> Dan ii
>
>
>
> Dan W McCarn, Geologist
>
> 108 Sherwood Blvd
>
> Los Alamos, NM 87544-3425
>
> +1-505-672-2014 (Home ? New Mexico)
>
> +1-505-670-8123 (Mobile - New Mexico)
>
> HotGreenChile at gmail.com<mailto:HotGreenChile at gmail.com> (Private 
> email) HotGreenChile at gmail dot com
>
>
>
>
>
> On Mon, Feb 25, 2013 at 5:26 PM, Jerry Cohen
<jjcohen at prodigy.net<mailto:
> jjcohen at prodigy.net>> wrote:
>
>
>
> > There are only 3 possibilities for future climate change:
>
> >
>
> > 1.) The climate will  get warmer
>
> > 2.) The climate wil become colder, or
>
> > 3.) The climate will remain about the same
>
> >
>
> > Whatever actually happens, there will be a hugh constituency 
> > claiming
> that
> > they predicted it. FYI, I belong in the 3rd group.
>
>
>
>
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