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| Titel |
Evaluation of evapotranspiration processes in global models (hydrological and LSMs) using flux tower data at different time scales during dry-down |
| VerfasserIn |
Emma Robinson, Alberto Martinez-de la Torre, Eleanor Blyth |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250143208
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| Publikation (Nr.) |
 EGU/EGU2017-6910.pdf |
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| Zusammenfassung |
| In the context of model evaluation for a total of 10 global hydrological and land surface models, we analyse model performance in terms of evapotranspiration decay during dry events (10-day periods of no precipitation). For the evaluation, we use a set of flux tower sites that provides half-hourly evapotranspiration data and represents different land covers and climates around the world. In order to focus on water limited conditions, the dry-down curve dependency on soil moisture conditions is also analysed.
In addition, evapotranspiration in the first hours after a precipitation event is dominated by evaporation from water intercepted by the canopy. The interception component has a much faster dry-down and we investigate how the difference in dry-down rates can be used to evaluate the interception fraction in global models.
Our dry-down analysis characterizes different models on their response to water limited conditions and their interception fraction and provides a potential constraint for future climate change model projections. |
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