Untersuchung thermischer Eigenschaften unterschiedlicher Habitate im Schweizerischen Nationalpark in der Raum-Zeit-Relation
Thermal properties of habitats in the Swiss National Park related to space ad time
Project Number: CH-5988
||01/01/2015 - ? project completed
||Dr. Ruedi Haller
Forschung und Geoinformation
Phone: +41 (0) 81 851 41 11
FAX: +41 (0) 81 851 41 12
| engineering sciences|
Thermische Eigenschaften, Habitate, Nationalpark
The Swiss National Park, which covers an area that has been almost entirely left to nature in the past 100 years, has served for generations of researchers as the fundament of their studies. New studies have been continuously carried out, extended or verified with novel methods. The present study adds value to this strand of research through the use of a fixed thermal imaging camera in two discrete areas of the National Park. The areas are the fire damaged Il Fuorn at the Ofenpass road and the orographic right side of the valley of Val Trupchun. The two slopes were alternately photographed every half hour between April and September 2015 and the results form the core of this study.
The research focus is on the mapping of the temperature history of habitats (similar surface temperature with respect to time). Central was the development of the methodology for the classification of habitats according to thermal properties; a procedure that has not been described in scientific studies so far. The methodology was primarily based on the temperature changes during the day and classified the thermal habitats in accordance to these characteristics. The statistical analyses illustrated the average temperatures of the habitats in temperature curves. During intense sunlight periods, the classified habi- tats could be differentiated from each other due to different temperature increases and decreases and different surface temperatures. This knowledge confirmed the quality of the classification of habitats. Also, a clear correlation between the habitat boundaries and the topographical terrain break lines could be made.
However, the number of simultaneously displayed temperature curves had to be reduced due to the limited capacity of the human eye. As an alternative method, the present study investigated to what extent and in what particular manner can Story Maps, as an image sequence over time, facilitate the interpretation. The Story Map proved to be a suitable analytical instrument, in particular when all habitats should be considered, or when the temperature changes from image to image or over short time intervals were of interest. Yet, the Story Map could not fully replace the temperature curves, which have the benefit of offering a good overview over long periods of time.
The final georeferencing of the habitat was only of limited use because of major distor- tions caused by mapping the trees (surface) in the terrain model. In contrast, georefer- encing of the picture points could make sense under exclusion of tree habitats. The georeferencing is the basis for the overlay of spatial data by third parties. It is left open whether the overlays are done georeferenced or in the thermal image.
Lauber Ch. (2016) Untersuchung thermischer Eigenschaften unterschiedlicher Habitate im Schweizerischen Nationalpark in der Raum-Zeit-Relation. Master Thesis UNIGIS Universität Salzburg.PDF Masterarbeit
Last update: 7/18/17
Source of data: ProClim- Research InfoSystem (1993-2020)
Update the data of project: CH-5988