Carbon isotope composition of ambient CO2 and recycling: a matrix simulation model

Ecological Modelling
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Abstract

The relationship between isotopic composition and concentration of ambient CO2 in a canopy and its associated convective boundary layer was modeled. The model divides the canopy and convective boundary layer into several layers. Photosynthesis, respiration, and exchange between each layer can be simulated by matrix equations. This simulation can be used to calculate recycling; defined here as the amount of respired CO2 re-fixed by photosynthesis relative to the total amount of respired CO2. At steady state the matrix equations can be solved for the canopy and convective boundary layer CO2 concentration and isotopic profile, which can be used to calculate a theoretical recycling index according to a previously developed equation. There is complete agreement between simulated and theoretical recycling indices for different exchange scenarios. Recycling indices from a simulation of gas exchange between a heterogeneous vegetation canopy and the troposphere also agreed with a more generalized form of the theoretical recycling equation developed here.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Carbon isotope composition of ambient CO2 and recycling: a matrix simulation model
Series title Ecological Modelling
DOI 10.1016/S0304-3800(02)00055-8
Volume 154
Issue 1-2
Year Published 2002
Language English
Publisher Elsevier
Contributing office(s) Southeast Ecological Science Center
Description 14 p.
First page 179
Last page 192
Online Only (Y/N) N
Additional Online Files (Y/N) N