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Vortragsreihe Ökologie und Umweltforschung WS 2009/10

Donnerstag 16:15-17:45 H6, Geo

Prof. Yaoming Ma (Vortrag fällt aus!)
Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, CAS, Beijing
Montag, , 07.12.2009 16:15-17:45 H8:

Vortrag fällt aus!

ACHTUNG Vortrag fällt aus. Prof Ma kann aus China NICHT anreisen!


invited by Prof Foken

As a unique geological and geographical unit, the Tibetan Plateau dramatically impacts the world’s environment and especially controls climatic and environmental changes in China, Asia and even in the Northern Hemisphere. Tibetan Plateau, therefore, provides a field laboratory for studying global change. With support from various agencies in the People’s Republic of China, a Tibetan Observation and Research Platform (TORP) is now implementing. Firstly the background of the establishment of the TORP, the establishing and monitoring plan of long-term scale (5-10 years) of the TORP will be introduced. Then the preliminary observational analysis results, such as the characteristics of land surface heat fluxes and CO2 flux partitioning, the characteristics of atmospheric and soil variables, the structure of the Atmospheric Boundary Layer (ABL) and the turbulent characteristics will also be shown. The study on the regional distribution of land surface heat fluxes of paramount importance over heterogeneous landscape of the Tibetan Plateau. Therefore, here the parameterization methods based on satellite data (NOAA/AVHRR, Landsat-7 ETM, ASTER and MODIS) and ABL observations have been proposed and tested for deriving surface reflectance, surface temperature, NDVI, MSAVI, vegetation coverage, LAI, net radiation flux, soil heat flux, sensible heat flux and latent heat flux over heterogeneous landscape. As cases study, the methods were applied to the experimental area of the CAMP/Tibet (CEOP (Coordinated Enhanced Observing Period) Asia-Australia Monsoon Project (CAMP) on the Tibetan Plateau), which located at the central Tibetan Plateau and the whole Tibetan Plateau area. Five scenes of Landsat-7 ETM data, four scenes of NOAA/AVHRR data, three scenes of ASTER data and four MODIS data were used in this study. To validate the proposed methods, the ground-measured values are compared to satellite derived values. The results show that the derived surface variables and land surface heat fluxes over the study area are in good accordance with the land surface status. It is therefore concluded that the proposed methods are successful for the retrieval of land surface variables and land surface heat fluxes over heterogeneous landscape of the Tibetan Plateau area. Further improvement of the methods and its applying field will also be discussed.

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