During the development of DAISY, the snowpack model we
realised that we did not have enough accurate calibration measurements. We
needed more reliable measurements of snow temperatures and settlements
within the snow cover.
Therefore, from winter 1990/91 the thermal development of the season snow
cover in the test field with self-developed temperature harps was measured.
These temperature harps can move freely with the snow cover, in contrast to
the usually fixed temperature profiles.
With these harps, it became possible to monitor the temperatures and
settlements of the individual layers throughout the winter.
Additionally, the surface temperature, snow level and the usual
meteorological parameters such as air temperature, humidity, wind speed and
the radiation in various wavelength ranges were measured.
Furthermore, conventional snow profiles were recorded with measurements of
densities, hardness, grain sizes and grain shapes.
During three winters, this facility was intensively used for monitoring
purposes. The support and monitoring of these measurements and the
accompanying, very time-intensive manual measurements were carried out by
Peter Weilenmann and Franz Herzog.
The results of these measurements in winter 1990/91, 1991/92 and 1992/93
are given in the internal report No. 723.
The use of these measurements for the validation of DAISY and MiniDAISY are
gathered internally in report No. 724..726.
