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The scintillation technique is one of the few techniques that can provide fluxes at scales of several kilometers (10 km). For example the combination of a large aperture optical scintillometer (LAS) and a radio wave scintillometer (RWS), also known as the two-wavelength method, can provide the fluxes of both H and LvE at kilometer scales.
So far there have been only a few experiments with (optical) scintillometers operated over heterogeneous terrain and only one experiment that systematically investigated the two-wavelength method (see Boundary-Layer Meteorology special issue on scintillomerty, volume 105, 2002).
In this study we will present the results of scintillometer measurements carried out during the LITFASS-2003 experiment using three large aperture scintillometers (LAS) and one radio wave scintillometer (RWS). All scintillometers were installed in different parts of the Lindenberg area (20 x 20 km2). The orography of the Lindenberg area has been formed by inland glaciers during the last ice age and is characterized by slight, irregular undulations and a number of small lakes. The land use consists of 42% forest, 47% farmland, 7% open water and 4% villages, making it an ideal heterogeneous area for testing the scintillation technique. The scintillometers were installed as follows:
One LAS and the RWS were installed over a path length of 4.7 km. The source area of the scintillometers consists roughly of 10% forest and 90% farmland. The second LAS was installed over a homogenous forest (path length 3 km). Finally, and extra large aperture scintillometer (XLAS) was set-up over a path length of 10 km. The source area of the XLAS consists roughly of 70% forests and 30% farmland.
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