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Dear Kazushi Takahashi,
some useful references for trapping of CO2 from soils for isotope
ratio measurements are:
J. I. Freijer; W. Bouten (1991) A comparison of field methods for
measuring soil carbon dioxide evolution: experiments and simulation.
Plant and Soil, vol. 135, pp. 133 - 142.
G. R. Davidson (1995) The stable isotopic composition and measurement
of carbon in soil CO2. Geochim. Cosmochim. Acta, vol. 59 no. 12, pp.
2485 - 2489.
P. Fritz; A. A. Mozeto; E. J. Reardon (1985) Practical considerations
on carbon isotope studies on soil carbon dioxide. Chem. Geol., vol.
58, pp. 89 - 95.
T. E. Cerling; D. K. Solomon; J. Quade; J. R. Bowman (1991) On the
isotopic composition of carbon in soil carbon dioxide. Geochim.
Cosmochim. Acta, vol. 55, pp. 3403 - 3405.
Some of these deal with trapping of CO2 emitted from soils, others
with measurement of within-soil CO2. Freijer & Bouten (1991) is not
about isotope ratio but exact concentration measurements. It
gives a good overview and comparison of several methods for trapping
emitted CO2 quantitatively.
Frank Pawellek
----------------------------
Frank Pawellek
Stable Isotope Laboratory
Department of Geography
University of Wales, Swansea
Singleton Park
Swansea SA2 8PP
Wales / GB
Tel. +44 1792 295148
Fax. +44 1792 205556
email [log in to unmask]
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