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Modeling gas exchange and biomass production in West African Sahelian and Sudanian ecological zones

Rahimi, Jaber 1,2; Ago, Expedit Evariste; Ayantunde, Augustine; Berger, Sina 1,2; Bogaert, Jan; Butterbach-Bahl, Klaus 1,2; Cappelaere, Bernard; Cohard, Jean-Martial; Demarty, Jérôme; Diouf, Abdoul Aziz; Falk, Ulrike; Haas, Edwin 1,2; Hiernaux, Pierre; Kraus, David ORCID iD icon 1,2; Roupsard, Olivier; Scheer, Clemens ORCID iD icon 1,2; Srivastava, Amit Kumar; Tagesson, Torbern; Grote, Rüdiger ORCID iD icon 1,2
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

West African Sahelian and Sudanian ecosystems provide essential services to people and also play a significant role within the global carbon cycle. However, climate and land use are dynamically changing, and uncertainty remains with respect to how these changes will affect the potential of these regions to provide food and fodder resources or how they will affect the biosphere–atmosphere exchange of CO2. In this study, we investigate the capacity of a process-based biogeochemical model, LandscapeDNDC, to simulate net ecosystem exchange (NEE) and aboveground biomass of typical managed and natural Sahelian and Sudanian savanna ecosystems. In order to improve the simulation of phenology, we introduced soil-water availability as a common driver of foliage development and productivity for all of these systems. The new approach was tested by using a sample of sites (calibration sites) that provided NEE from flux tower observations as well as leaf area index data from satellite images (MODIS, MODerate resolution Imaging Spectroradiometer). For assessing the simulation accuracy, we applied the calibrated model to 42 additional sites (validation sites) across West Africa for which measured aboveground biomass data were available. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000134365
Veröffentlicht am 24.06.2021
DOI: 10.5194/gmd-14-3789-2021
Zitationen: 3
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Institut für Meteorologie und Klimaforschung (IMK)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 24.06.2021
Sprache Englisch
Identifikator ISSN: 1991-9603
KITopen-ID: 1000134365
HGF-Programm 12.11.22 (POF IV, LK 01) Managed ecosystems as sources and sinks of GHGs
Weitere HGF-Programme 12.02.01 (POF III, LK 01) Effects of land use and climate change
Erschienen in Geoscientific model development
Verlag Copernicus Publications
Band 14
Heft 6
Seiten 3789–3812
Projektinformation UPSCALERS (AU, AURG II-1-074-2016)
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Web of Science
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