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| Titel |
Determination of land surface heat fluxes over heterogeneous landscape of the Tibetan Plateau by using the MODIS and in situ data |
| VerfasserIn |
Y. Ma, L. Zhong, B. Wang, W. Ma, X. Chen, M. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 20 ; Nr. 11, no. 20 (2011-10-21), S.10461-10469 |
| Datensatznummer |
250010137
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| Publikation (Nr.) |
 copernicus.org/acp-11-10461-2011.pdf |
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| Zusammenfassung |
| In this study, a parameterization methodology based on MODIS (Moderate
Resolution Imaging Spectroradiometer) and in situ data is proposed and tested for
deriving the regional surface reflectance, surface temperature, net
radiation flux, soil heat flux, sensible heat flux and latent heat flux over
heterogeneous landscape. As a case study, the methodology was applied to the
Tibetan Plateau area. Four images of MODIS data (30 January 2007, 15 April
2007, 1 August 2007 and 25 October 2007) were used in this study for the
comparison among winter, spring, summer and autumn. The derived results were
also validated by using the "ground truth" measured in the stations of the
Tibetan Observation and Research Platform (TORP). The results show that the
derived surface variables (surface reflectance and surface temperature) and
surface heat fluxes (net radiation flux, soil heat flux, sensible heat flux
and latent heat flux) in four different seasons over the Tibetan Plateau
area are in good accordance with the land surface status. These parameters
show a wide range due to the strong contrast of surface features over the
Tibetan Plateau. Also, the estimated land surface variables and surface heat
fluxes are in good agreement with the ground measurements, and all their
absolute percent difference (APD) is less than 10% in the validation
sites. It is therefore concluded that the proposed methodology is successful
for the retrieval of land surface variables and surface heat fluxes using
the MODIS and in situ data over the Tibetan Plateau area. The shortage and
further improvement of the methodology were also discussed. |
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