Emilio,
Thanks for the information. If those papers don't have what I'm looking for, I'm sure their references would be useful. 
Thanks again.

-Tom

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
University of Arkansas Stable Isotope Laboratory
http://www.uark.edu/ua/isotope/



----- Original Message -----
From: Emilio Mayorga <[log in to unmask]>
Date: Wednesday, February 7, 2007 9:02 am
Subject: Re: [ISOGEOCHEM] atmospheric carbon istope paper
To: [log in to unmask]

> Tom,
> 
> The isotopic (13C & 14C) imprint of fossil fuel combustion on
> atmospheric CO2 is a well established result. I'm sure you'd find it
> well described in many articles and books, so identifying the one
> particular article you're looking for could be hard. Off the top of my
> head, I can't recall the classic articles or outstanding review
> articles, so here are three somewhat recent ones to get you on the
> right track:
> 
> Francey, R.; Allison, C.; Etheridge, D.; Trudinger, C.; Enting, I.;
> Leuenberger, M.; Langenfelds, R.; Michel, E. & Steele, L. A 1000-year
> high precision record of d13C in atmospheric CO2. Tellus, 1999, 51B,
> 170-193
> 
> Levin, I. & Hesshaimer, V. Radiocarbon -- A unique tracer of global
> carbon cycle dynamics Radiocarbon, 2000, 42, 69-80
> 
> Randerson, J.; Enting, I.; Schuur, E.; Caldeira, K. & Fung, I.
> Seasonal and latitudinal variability of troposphere D14CO2: Post bomb
> contributions from fossil fuels, oceans, the stratosphere, and the
> terrestrial biosphere Global Biogeochemical Cycles, 2002, 16, 1112,
> doi:10.1029/2002GB001876
> 
> Good luck. Cheers,
> 
> -Emilio Mayorga
> Rutgers, The State University of New Jersey
> Institute of Marine and Coastal Sciences
> 71 Dudley Rd.
> New Brunswick, NJ 08901-8521, USA
> Tel: 732-932-6555 x338
> FAX: 732-932-1792
> Email: [log in to unmask]
> 
> 
> On 2/7/07, Thomas L. Millican <[log in to unmask]> wrote:
> > Hello All,
> > I was told of a journal article discussing the isotope ratio of 
> carbon in the atmosphere. Supposedly, the article links the 
> increased atmospheric CO2 concentration to anthropogenic sources 
> through this carbon isotope ratio.
> > Unfortunately, after a couple of weeks of looking for this 
> article, I have been unable to find it. Has anyone else come across 
> such an article? Either my searching technique is really lacking, 
> or it doesn't exist (the article).
> > Thanks,
> > -Tom Millican
> >
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > University of Arkansas Stable Isotope Laboratory
> > http://www.uark.edu/ua/isotope/
> >
>