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| Titel |
High-fidelity subsurface thermal model as part of a Martian atmospheric column model |
| VerfasserIn |
M. D. Paton, A.-M. Harri, T. Mäkinen, H. Savijärvi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2193-0856
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 2, no. 1 ; Nr. 2, no. 1 (2013-01-18), S.17-27 |
| Datensatznummer |
250017333
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| Publikation (Nr.) |
 copernicus.org/gi-2-17-2013.pdf |
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| Zusammenfassung |
| As the Martian atmosphere is observed in ever greater detail, more realistic
computer models are required to interpret these measurements. Physical
exchange processes between the atmosphere's lower boundary and the surface
are often simplified. This is because the atmospheric calculations can
describe the behaviour of the atmosphere accurately in many cases and
simplifying the boundaries saves computing resources. However, the vertical
heterogeneity of the subsurface (such as the presence of dust and ice
layers) will interact via heat and mass transfer with the atmosphere. Here a
new realistic numerical thermal conductivity scheme is introduced for use with a 1-D atmospheric
column model useful for investigating the subsurface for layered material
and to provide more accurate modelling of the Martian atmosphere. The model
with the updated scheme produces results that are identical to the previous
versions of the model in identical (non-layered) conditions. The updated
model fits well to Viking 1 temperature data from the atmosphere using
realistic thermal parameters. Introducing layered material, with different
thermal properties, produces noticeable changes in the maximum and diurnal
temperatures when changing the thickness of its top layer. The time of
maximum surface temperature is only significantly changed when the thickness
of the top layer is a moderate fraction of the top layer's skin depth. |
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