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| Titel |
Advancement toward coupling of the VAMPER permafrost model within the Earth system model iLOVECLIM (version 1.0): description and validation |
| VerfasserIn |
D. C. Kitover, R. van Balen, D. M. Roche, J. Vandenberghe, H. Renssen |
| 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 ; 8, no. 5 ; Nr. 8, no. 5 (2015-05-18), S.1445-1460 |
| Datensatznummer |
250116343
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| Publikation (Nr.) |
 copernicus.org/gmd-8-1445-2015.pdf |
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| Zusammenfassung |
| The VU Amsterdam Permafrost (VAMPER) permafrost model has been enhanced with snow thickness and active
layer calculations in preparation for coupling within the iLOVECLIM Earth system model of intermediate complexity (EMIC). In addition, maps of basal heat
flux and lithology were developed within ECBilt, the atmosphere component of
iLOVECLIM, so that VAMPER may use spatially varying parameters of geothermal
heat flux and porosity values. The enhanced VAMPER model is validated by
comparing the simulated modern-day extent of permafrost thickness with
observations. To perform the simulations, the VAMPER model is forced by
iLOVECLIM land surface temperatures. Results show that the simulation which
did not include the snow cover option overestimated the present permafrost
extent. However, when the snow component is included, the simulated
permafrost extent is reduced too much. In analyzing simulated permafrost depths, it was found that most of the modeled thickness values and
subsurface temperatures fall within a reasonable range of the corresponding
observed values. Discrepancies between simulated and observed permafrost depth distribution are due to
lack of captured effects from features such as topography and organic soil
layers. In addition, some discrepancy is also due to disequilibrium with the
current climate, meaning that some observed permafrost is a result of colder
states and therefore cannot be reproduced accurately with constant
iLOVECLIM preindustrial forcings. |
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