Drylands under pressure: vegetation modeling of dryland ecosystems in the Sahel
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- Drylands under pressure
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Dryland ecosystems form a major land cover (40% of the Earth's surface,
accounting for approximately 40% of the global net primary productivity)
that is largely under pressure due to global change and human
activities, but which is also largely understudied. Our research hence
aims to bridge current knowledge gaps in the paleotropics by unraveling
the driving mechanisms of vegetation shifts in the Sahel. To do this, we
combine in-situ measurements with dynamic global vegetation models
(DGVMs) and remote sensing observations. In this presentation we show
our first model results with two state-of-the-art DGVMs (the Ecosystem
Demography model, ED2, and the Lund-Potsdam-Jena General Ecosystem
Simulator, LPJ-GUESS), which we adapted to Sahel-specific conditions.
Our parameterization of these models is based on recent in-situ
measurements of meteorological conditions and plant functional traits.
For validation purposes, we compare our model's primary productivity
with flux tower measurements of carbon exchange across six Sahel sites.
We finally discuss the usefulness of remote sensing data integration
into ED2 and LPJ-GUESS, and support this discussion with a first
assessment of key model sensitivities.
Original language | English |
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Article number | 13042 |
Journal | Geophysical Research Abstracts |
Volume | 20 |
ISSN | 1607-7962 |
Publication status | Published - 2018 |
Links
- http://adsabs.harvard.edu/abs/2018EGUGA..2013042V
Final published version
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