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|Title:||Upscaling Ozone Flux in Forests from Leaf to Landscape|
|Authors:||WIESER G.; MATYSSEK R.; THEN C.; CIESLIK Stanislaw; PAOLETTI E.; CEULEMANS R.|
|Citation:||Italian Journal of Agronomy vol. 3 no. 1 p. 35-41|
|Publisher:||Società Italiana di Agronomia - Forum Editrice|
|Type:||Articles in periodicals and books|
|Abstract:||Although stomatal conductance for ozone (O3) correlates with leaf to air water vapor difference (VPDLA) at the leaf level, uncertainty in up-scaling to the whole tree level can be overcome by means of sap flow measurements at the tree trunk. Further up-scaling to the stand level is possible by relating whole tree O3 flux to silvicultural and/or tree-allometric data. In such a way, canopy conductance and O3 uptake can be related to ground surface area. When normalized, canopy conductance is demonstrated to follow a functional relationship to VPDLA across several forest ecosystems thus allowing a generalization of model approaches. Further up-scaling to the landscape level, however, needs further investigations due to differences in the response of canopy conductance to environmental drivers in forest stands and grassland ecosystems, respectively.|
|JRC Directorate:||Sustainable Resources|
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