This paper summarizes what is known about reactive carbon emissions from vegetation including the magnitude of local, landscape, and global scale fluxes and their contribution to atmospheric CO2.
We then put our Sierra Nevada O3 deposition measurements in perspective by comparing our results with measured O3 deposition velocity for sites outside the Sierra Nevada and by comparing ecosystem scale fluxes of O3 to other trace gases.
Gemini, a mechanistic model linking plant functional traits, plant populations, community dynamics, and ecosystem scale fluxes in grasslands has been reported in a companion paper (Soussana et al., 2012).
Leaf-level information is used to scale fluxes up to the canopy to estimate gross primary production using a physiology-based process model.
At the day scale, fluxes were mainly controlled by radiation and to a lesser extent by the VPD.
The paper provides an opportunity to compare reach-scale flux estimates using both techniques.
Furthermore, small-scale flux emergence and cancellation can be identified easily within the flaring region of the CME-associated flares.
In the field, ecosystem-scale flux measurements of atmospheric H2 were made both above and below the forest canopy for over a year using a custom, automated instrument at the Harvard Forest.
However, we can always identify one or more small-scale flux emergence or cancellation in the studied ARs even though not any obvious surface activities.
Results show that the radon-222 profile method can estimate a narrower range of point-scale flux than the temperature profile method.
