Measurements of net ecosystem CO2 exchange
using continental tower flux networks provide a critical constraint in models
of regional and global carbon budgets. Uncertainty exists in these measurements
due to the effects of complex terrain and vegetation gradients. Using an array
of seven towers distributed across a mountain landscape, we estimated that a
significant error exists in the five-year record of measured net ecosystem CO2
exchange. The error was due to the previously ignored influence of advective CO2
fluxes. When this error was rectified by explicit consideration of the
advective flux components, the forest was predicted to exhibit a 38% higher
potential for carbon sequestration than previously thought.
Author: R. Monson, C. Yi, D. Anderson, J. Sun, B. Lamb, et al (russell dot monson at colorado dot edu)
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