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Validation of the Operational Msg-seviri Snow Cover Product Over Austria : Volume 10, Issue 10 (07/10/2013)

By Surer, S.

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Book Id: WPLBN0004011535
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Validation of the Operational Msg-seviri Snow Cover Product Over Austria : Volume 10, Issue 10 (07/10/2013)  
Author: Surer, S.
Volume: Vol. 10, Issue 10
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Parajka, J., Akyurek, Z., & Surer, S. (2013). Validation of the Operational Msg-seviri Snow Cover Product Over Austria : Volume 10, Issue 10 (07/10/2013). Retrieved from http://hawaiilibrary.net/


Description
Description: Geodetic and Geographic Information Technologies, Middle East Technical University, Ankara, Turkey. 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 on board of 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 in 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 much 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.


Summary
Validation of the operational MSG-SEVIRI snow cover product over Austria

Excerpt
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