HR: 11:45h
AN: B31G-06    [PDF]
TI: The impact of land use change on the energy and water fluxes between atmosphere and tropical vegetation in Central Sulawesi, Indonesia
AU: * Falk, U
EM: ufalk@gwdg.de
AF: Institute of Bioclimatology, University Goettingen, Buesgenweg 2, Goettingen, D-37077 Germany
AU: Ibrom, A
EM: aibrom@gwdg.de
AF: Institute of Bioclimatology, University Goettingen, Buesgenweg 2, Goettingen, D-37077 Germany
AU: Kreilein, H
EM: hkreile@gwdg.de
AF: Institute of Bioclimatology, University Goettingen, Buesgenweg 2, Goettingen, D-37077 Germany
AU: Oltchev, A
EM: aoltche@gwdg.de
AF: Institute of Bioclimatology, University Goettingen, Buesgenweg 2, Goettingen, D-37077 Germany
AU: Gravenhorst, G
EM: ggraven@gwdg.de
AF: Institute of Bioclimatology, University Goettingen, Buesgenweg 2, Goettingen, D-37077 Germany
AB: The conversion of tropical rain forest to agriculturally used land is a widespread process throughout Indonesia. Besides the effects on the biological diversity and the hydrological functions of a forest, this also has an impact on the turbulent exchange processes between vegetation and atmosphere, the radiative properties of the surface and therefore on atmospheric boundary layer and local climate. Within the framework of the project STORMA "Stability of rain forest margins" (SFB 552, University Goettingen, financed by the German Research Foundation), the energy and water fluxes above one of the major land use types, a Cacao plantation, were investigated using the Eddy-Covariance method. Simultaneously meteorological measurements of the variables wind speed and velocity, temperature, humidity, rainfall, soil heat flux and the components of the radiation budget were performed, in order to complete the energy balance and investigate the dependencies of the turbulent exchange processes on the atmospheric boundary conditions. The measurements are being compared to a SVAT model, providing the heat flux into the vegetation. Energy balance closure is used as a means to check the quality of the measured fluxes. The comparison to measurements above undisturbed rain forest by means of the ratio of sensible to latent heat flux, the Bowen ratio, indicates a significantly different boundary layer regime of the atmosphere above the Cacao.
DE: 0400 Biogeosciences
DE: 3307 Boundary layer processes
DE: 3322 Land/atmosphere interactions
DE: 3374 Tropical meteorology
DE: 3379 Turbulence
SC: Biogeosciences [B]
MN: 2003 Fall Meeting