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| Titel |
Implementation and evaluation of a new methane model within a dynamic global vegetation model: LPJ-WHyMe v1.3.1 |
| VerfasserIn |
R. Wania, I. Ross, I. C. Prentice |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 3, no. 2 ; Nr. 3, no. 2 (2010-10-27), S.565-584 |
| Datensatznummer |
250000956
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| Publikation (Nr.) |
 copernicus.org/gmd-3-565-2010.pdf |
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| Zusammenfassung |
| For the first time, a model that simulates methane emissions from
northern peatlands is incorporated directly into a dynamic global
vegetation model. The model, LPJ-WHyMe (LPJ Wetland
Hydrology and Methane), was previously modified in order
to simulate peatland hydrology, permafrost dynamics and peatland
vegetation. LPJ-WHyMe simulates methane emissions using a mechanistic
approach, although the use of some empirical relationships and
parameters is unavoidable. The model simulates methane production,
three pathways of methane transport (diffusion, plant-mediated
transport and ebullition) and methane oxidation. A sensitivity test
was conducted to identify the most important factors influencing
methane emissions, followed by a parameter fitting exercise to find
the best combination of parameter values for individual sites and over
all sites. A comparison of model results to observations from seven
sites resulted in normalised root mean square errors (NRMSE) of 0.40 to
1.15 when using the best site parameter combinations and 0.68 to 1.42
when using the best overall parameter combination. |
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