At 10:05 14.3.00 +0100, you wrote:
>I am actually looking for an equation giving the variation of delta 13C of
>dissolved inorganic carbon or dissolved CO2 in water (fresh- and marine
>water) with water temperature. Had enyone ever seen such an equation or a
>paper on this subject?

Dear Nicolas,

Have a look at:

Zhang, J., Quay, P.D. & Wilbur, D.O. (1995): Carbon isotope fractionation
during gas-water exchange and dissolution of CO2. Geochim. Cosmochim. Acta,
59, 107-114
for experimental determination of the temperature dependant fractionation.
Or see:
Gruber, N. et al. (1999): Spatiotemporal patterns of carbon-13 in the
global surface oceans and the oceanic Suess effect. Global Biogeochem.
Cycles, 13, 307-335
for actual temperature effects in ocean surface waters.

Best Regards,
Florian Boehm

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Florian Boehm
GEOMAR
Forschungszentrum für Marine Geowissenschaften
Wischhofstr. 1-3, Gebäude 4, D-24148 Kiel
email: [log in to unmask]
http://www.geomar.de/~fboehm/
Tel.: (49)431-600-2842    Fax:  (49)431-600-2941
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