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Updated: Jul 2, 2026
09:05
Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
Published on: June 24, 2019
CO2 fluxes near a forest edge: a numerical study
Andrey Sogachev1, Monique Y Leclerc, Gengsheng Zhang
1Department of Physics, University of Helsinki, P.O. Box 64, Helsinki FI-00014, Finland. andrey.sogachev@risoe.dk
Summary
Forest edges significantly impact carbon dioxide (CO2) transfer, influencing CO2 exchange and flux patterns. Understanding these dynamics is crucial for accurate CO2 flux measurements and experiments.
Area of Science:
- Environmental science
- Atmospheric science
- Forest ecology
Background:
- Recent research has focused on forest edge flow dynamics, but less on scalar transport, especially CO2 transfer.
- The influence of abrupt roughness changes at forest edges on CO2 exchange remains understudied.
Purpose of the Study:
- To investigate the impact of forest edges on atmospheric boundary layer CO2 exchange.
- To contrast CO2 concentration and flux fields at forest edges with those over uniform forest surfaces.
Main Methods:
- Utilized an atmospheric boundary layer two-equation closure model.
- Incorporated flow dynamics and vertical divergence of CO2 sources/sinks within a plant canopy.
- Characterized spatial CO2 flux variations based on source/sink distribution and canopy structure.
Main Results:
- Ground CO2 sources significantly influence wave-like vertical CO2 flux patterns downwind of forest edges.
- Scalar advection in the trunk space causes variations in vertical CO2 fluxes.
- These effects are more pronounced in canopies with upper-leaf area concentration.
Conclusions:
- Forest edges create distinct CO2 flux behaviors compared to uniform forests.
- Findings aid in interpreting CO2 flux tower data and designing future CO2 transport experiments.
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