Journal article
Stomatal and non-stomatal fluxes of ozone to a northern mixed hardwood forest
Tellus. Series B, Chemical and physical meteorology, Vol.59(3), pp.514-525
01/01/2007
Handle:
https://hdl.handle.net/2376/104782
Abstract
Measurements of ozone, sensible heat, and latent heat fluxes and plant physiological parameters were made at a northern mixed hardwood forest located at the University of Michigan Biological Station in northern Michigan from June 27 to September 28, 2002. These measurements were used to calculate total ozone flux and partitioning between stomatal and non-stomatal sinks. Total ozone flux varied diurnally with maximum values reaching 100 μmol m
-2
h
-1
at midday and minimums at or near zero at night. Mean daytime canopy conductance was 0.5 mol m
-2
s
-1
. During daytime, non-stomatal ozone conductance accounted for as much as 66% of canopy conductance, with the non-stomatal sink representing 63% of the ozone flux. Stomatal conductance showed expected patterns of behaviour with respect to photosynthetic photon flux density (PPFD) and vapour pressure defecit (VPD). Non-stomatal conductance for ozone increased monotonically with increasing PPFD, increased with temperature (T) before falling off again at high T, and behaved similarly for VPD. Day-time non-stomatal ozone sinks are large and vary with time and environmental drivers, particularly PPFD and T. This information is crucial to deriving mechanistic models that can simulate ozone uptake by different vegetation types
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Details
- Title
- Stomatal and non-stomatal fluxes of ozone to a northern mixed hardwood forest
- Creators
- Alan Hogg - Department of Atmospheric, Oceanic, and Space Sciences, University of MichiganJohan Uddling - School of Natural Resources and Environment, University of MichiganDavid Ellsworth - School of Natural Resources and Environment, University of MichiganMary Anne Carroll - Department of Chemistry, University of MichiganShelley Pressley - Department of Civil and Environmental Engineering, Washington State UniversityBrian Lamb - Department of Civil and Environmental Engineering, Washington State UniversityChristoph Vogel - University of Michigan Biological Station, University of Michigan
- Publication Details
- Tellus. Series B, Chemical and physical meteorology, Vol.59(3), pp.514-525
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Taylor & Francis
- Identifiers
- 99900546623201842
- Language
- English
- Resource Type
- Journal article