Dear all,

we have several questions regarding fractionation effects associated with
dissolved air in water.

We measure isotopic composition on Nitrogen and Oxygen from air bubbles
which are in contact with water at 20°C. The water can be undersaturated
and the air is not necessarily in equilibrium with the water. Thus we are
interested in equilibrium and kinetic fractionation effects between
dissolved and gaseous Oxygen and Nitrogen and in molecular diffusion
coefficients of the Oxygen and Nitrogen isotopes in water. We search for
the following data:

Equilibrium fractionation between dissolved and gaseous Nitrogen (delta 15N).
Kinetic fractionation effects due to solution of Nitrogen (delta15N) and
Oxygen (delta18O) in water.
Diffusion coefficients of 15N-14N , 14N-14N ,18O-16O and 16O-16O in water.

We hope to get some information this way, thank you in advance.

Best wishes,

Markus Leuenberger

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Dr. Markus C. Leuenberger
Climate and Environmental Physics
Physics Instiute, Universität Bern
Sidlerstrasse 5
3012 Bern
Fax +41 (0)31 631 87 42 (NEW FAX NUMBER)
ph 031/ 631 44 70
email: [log in to unmask]
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