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| Titel |
Quantifying the effects of interacting nutrient cycles on terrestrial biosphere dynamics and their climate feedbacks (QUINCY) |
| VerfasserIn |
Sönke Zaehle, Silvia Caldararu, Lucia Eder, Jan Engel, Melanie Kern, Marion Schrumpf, Enrico Weber |
| 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 |
250148877
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| Publikation (Nr.) |
 EGU/EGU2017-13174.pdf |
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| Zusammenfassung |
| Nutrient availability plays a pivotal role in the response of terrestrial ecosystems to increasing
atmospheric CO2 and climate change. The first generation of global nutrient-carbon cycle
models shows strongly diverging estimates of the nutrient effect, resulting from lacking
integration of ecosystem observations and fundamental uncertainties in the representation of
governing processes. The two fundamental areas in which advances in modelling are required
at i)the effects of nutrient availability on plant photosynthesis and respiration by explicitly
taking the energy requirement of nutrient acquisition into account, and ii) the effects of
vegetation-soil interactions, namely rhizosphere processes, on plant nutrient availability and
soil C turnover.
Here we present the methodology and first results of the QUINCY project, which
addresses these important issues by an approach encompassing experimentation and model
development. In particular, we outline a novel modelling approach to systematically link
carbon, nutrient and water flows within the framework of a general land surface model at
time-scales of minutes to decades, and illustrate, how (new) experimental data can (better)
constrain this novel model. |
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