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| Titel |
Modeling hydrology and vegetation interaction in a changing climate |
| VerfasserIn |
S. Fatichi, V. Y. Ivanov, E. Caporali |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025982
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| Zusammenfassung |
| The study provides a proof-of-concept framework to investigate the propagation of climate
disturbances as inferred, for example, from General Circulation Models (GCM), through an
eco-hydrologic system. When non-stationarity in the climate is considered, non-linear
effects and feedbacks between hydrological processes and vegetation seasonality
may arise. It becomes fundamental to understand and evaluate potential changes in
surface energy fluxes, soil moisture dynamics, as well as vegetation productivity. A
stochastic downscaling technique is developed in this study together with a weather
generator to generate future climate scenarios. The weather generator is designed to
reproduce climate statistics over a wide range of temporal scales, from high-frequency
extremes, to low-frequency inter-annual variability. In simulating future climate, it
includes the possibility to modify precipitation and temperature, on the basis of
statistical information inferred from a GCM scenario. The weather generator simulates
hourly variables as input to a novel eco-hydrological model. The hydrological model
reproduces all essential components of hydrological cycle, resolving complete mass and
energy budgets. The vegetation model parsimoniously parameterizes essential plant
life-cycle processes, including photosynthesis, phenology, carbon allocation, and tissue
turnover. In this study, hydrological states and vegetation response are examined for
two scenarios of future climate in different climatic systems. Possible interaction
between ecosystem and hydrological processes in a changing climate are discussed. |
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