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| Titel |
Aggregation effects of surface heterogeneity in land surface processes |
| VerfasserIn |
Z. Su, H. Pelgrum, M. Menenti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 3, no. 4 ; Nr. 3, no. 4, S.549-563 |
| Datensatznummer |
250001191
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| Publikation (Nr.) |
 copernicus.org/hess-3-549-1999.pdf |
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| Zusammenfassung |
| In order to investigate the aggregation
effects of surface heterogeneity in land surface processes we have adapted a
theory of aggregation. Two strategies have been adopted: 1) Aggregation of
radiative fluxes. The aggregated radiative fluxes are used to derive input
parameters that are then used to calculate the aerodynamic fluxes at different
aggregation levels. This is equivalent to observing the same area at different
resolutions using a certain remote sensor, and then calculating the aerodynamic
fluxes correspondingly. 2) Aggregation of aerodynamic fluxes calculated at the
original observation scale to different aggregation levels. A case study has
been conducted to identify the effects of aggregation on areal estimates of
sensible and latent heat fluxes. The length scales of surface variables in
heterogeneous landscapes are estimated by means of wavelet analysis. |
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