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Challenges for evaluating process-based models of gas exchange at forest sites with fetches of various species

Grote, R. ORCID iD icon 1; Korhonen, J.; Mammarella, I.
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)


Physiologically-based (or process-based) models are commonly applied to describe plant responses mechanistically in dependence on environmental conditions. They are increasingly evaluated with eddy-covariance measurements that integrate carbon and water exchange of an area of several hectares (called the fetch). However, almost all models applied to date in such exercises have considered only the dominant tree species and neglected other species that contributed to the measured gas exchange rates-either in separate patches or in mixture. This decreases the transferability of the model from one site to another because the contributions from other species might be different. It is therefore a major challenge in modeling today to separate the measured gas exchanges by sources. In this study, a detailed physiologically-based biosphere model is applied that allows distinguishing between tree species in mixed forests, considering them as «vegetation cohorts» that interact with each other. The sensitivity of the model to different assumptions about how different tree species contribute to an integrated measurement of standscale gas exchange is investigated. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/110086971
Veröffentlicht am 28.05.2018
DOI: 10.5424/fs/20112003-11084
Zitationen: 21
Web of Science
Zitationen: 21
Zitationen: 24
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2011
Sprache Englisch
Identifikator ISSN: 1131-7965, 2171-5068, 2171-9845
KITopen-ID: 110086971
HGF-Programm 12.02.02 (POF II, LK 01) Ökosystem - Atmosphäre Interaktionen
Erschienen in Forest systems
Verlag Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Band 20
Heft 3
Seiten 389-406
Schlagwörter forest structure, understorey, physiologically-oriented model, eddy-flux measurements, sensitivity analysis
Nachgewiesen in Web of Science
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