Sensitivity analysis of leaf wetness duration within a potato canopy
Autor: | Albert A. M. Holtslag, G.J.T. Kessel, Adrie F. G. Jacobs, Bert G. Heusinkveld |
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Rok vydání: | 2009 |
Předmět: |
Meteorologie en Luchtkwaliteit
Canopy Hydrology Atmospheric Science WIMEK Biointeracties and Plant Health estimating dew duration Meteorology and Air Quality field parameterization Wind speed meteorological models PRI Biointeractions en Plantgezondheid Environmental science Dew Precipitation Leaf area index Interception Water content Leaf wetness |
Zdroj: | Meteorological Applications, 16(4), 523-532 Meteorological Applications 16 (2009) 4 |
ISSN: | 1469-8080 1350-4827 |
DOI: | 10.1002/met.151 |
Popis: | A description and analysis is given of a wetness duration experiment, carried out in a potato field in the centre of the Netherlands in September 2005. The observations are used to design and evaluate a within-canopy dew model which provides the leaf wetness distribution within the canopy caused by dew processes and by precipitation. This withincanopy dew model consists of three layers (bottom, centre, top) each with equal contribution to the leaf area index. The model results compared favourably with experimental evidence. The sensitivity of the dew and precipitation interception on the amount of free water and the duration of the leaf wetness was analysed by varying the leaf area index and some important weather variables. The findings suggest that the leaf area index affects the amount of free water, but is barely sensitive to leaf wetness duration. Wind speed has hardly any effect on the amount of free water collection as well as on leaf wetness duration. The net radiation, however, appears to be sensitive to the amount of collected free water as well as the leaf wetness duration |
Databáze: | OpenAIRE |
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