Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

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Turbidity climatology
Turbidity is the main input of clear sky models, which are used for ground as well as satellite radiation
models. Existing climatologies did not fulfil the quality needs by this kind of models. Additionally new
measurements by satellites and on the ground were available back to 2000. Therefore a new climatology
for aerosol optical depth as well as Linke turbidity has been made. It’s based on 7 years of satellite
information (MISR and MODIS of NASA) and 10 year of ground measurements (AERONET of
NASA, http://aeronet.gsfc.nasa.gov/). First tests showed good results. Further post processing of data
is needed to be done next year. The data has been included in Meteonorm Version 6.0 already and
will be used in other radiation models.
Map showing yearly means of Linke Turbidity.
National / international cooperation
The work was done in the framework of IEA Solar Heating and Cooling Task 36. From Switzerland
there is also University of Geneva part of the task team.
Outlook
The validation of the solar radiation forecast will be carried on. First the model will be enhanced (WRF,
2-10 km spatial resolution). Secondly the forecast will be coupled with PV yield simulation to get a PV
production forecast. It will be included operationally in the online PV control service SPYCE
(www.spyce.ch). Thirdly the model will be enhanced by simple model output statistics.
References
[1] Homepage of IEA Solar Heating and Cooling Task 36: http://re.jrc.cec.eu.int/iea-shc-task36/index.htm
Solar Resource Management, J. Remund, Meteotest Seite 273 von 288