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| Titel |
Research Note:The comparison of two models that determine the effects of a vegetation canopy on passive microwave emission |
| VerfasserIn |
E. J. Burke, J.-P. Wigneron, R. J. Gurney |
| 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. 3 ; Nr. 3, no. 3, S.439-444 |
| Datensatznummer |
250001094
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| Publikation (Nr.) |
 copernicus.org/hess-3-439-1999.pdf |
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| Zusammenfassung |
| Two contrasting models are used to account for the effects of vegetation on
microwave emission from the soil. These are: a simple model which requires two
empirically derived parameters as input data (optical depth and single
scattering albedo); and a complex discrete model which requires a detailed
description of all of the components of the vegetation canopy. Both models
account effectively for the vegetation, although the simple model takes a
fraction of the computation time compared to the discrete model. However, the
simple model was fitted to the data, whereas the discrete model used measured
parameters as input. In addition to predicting the microwave brightness
temperature, the discrete model also calculates the optical depth and single
scattering albedo. These calculated values were in agreement with those fitted
using the simple model. Therefore, it is suggested that the discrete model could
be used to calculate the input parameters for the simple model. |
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