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Validation of the operational MSG-SEVIRI snow cover product over Austria
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hess-18-763-2014.pdf
Date
2014-2-24
Author
Surer, S.
Parajka, J.
Akyurek, Z.
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<jats:p>Abstract. The objective of this study is to evaluate the mapping accuracy of the MSG-SEVIRI operational snow cover product over Austria. The SEVIRI instrument is aboard the geostationary Meteosat Second Generation (MSG) satellite. The snow cover product provides 32 images per day, with a relatively low spatial resolution of 5 km over Austria. The mapping accuracy is examined at 178 stations with daily snow depth observations and compared with the daily MODIS-combined (Terra + Aqua) snow cover product for the period April 2008–June 2012. The results show that the 15 min temporal sampling allows a significant reduction of clouds in the snow cover product. The mean annual cloud coverage is less than 30% in Austria, as compared to 52% for the combined MODIS product. The mapping accuracy for cloud-free days is 89% as compared to 94% for MODIS. The largest mapping errors are found in regions with large topographical variability. The errors are noticeably larger at stations with elevations that differ greatly from those of the mean MSG-SEVIRI pixel elevations. The median of mapping accuracy for stations with absolute elevation difference less than 50 m and more than 500 m is 98.9 and 78.2%, respectively. A comparison between the MSG-SEVIRI and MODIS products indicates an 83% overall agreement. The largest disagreements are found in Alpine valleys and flatland areas in the spring and winter months, respectively. </jats:p>
Subject Keywords
North America
,
Modis
URI
https://hdl.handle.net/11511/51461
Journal
Hydrology and Earth System Sciences
DOI
https://doi.org/10.5194/hess-18-763-2014
Collections
Department of Civil Engineering, Article
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S. Surer, J. Parajka, and Z. Akyurek, “Validation of the operational MSG-SEVIRI snow cover product over Austria,”
Hydrology and Earth System Sciences
, vol. 18, no. 2, pp. 763–774, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51461.