APPLICATIONS OF METEOSAT SECOND GENERATION MSG Flooding Author

APPLICATIONS OF METEOSAT SECOND GENERATION (MSG) Flooding Author: Pirkko Pylkkö (Finnish Meteorological Institute) pirkko. pylkko@fmi. fi Jochen Kerkmann (EUMETSAT) jochen. kerkmann@eumetsat. int Sep 2005 01. 06. 05 1

Flood detection and monitoring Background • Rapidly updated satellite rainfall estimations at the geostationary scale – one of the tools to estimate floods • Benefits are more precise mesoscale and global scale weather forecasts, better monitoring of for instance flash floods, storm-scale events (See also Satmanu Manual, http: //www. knmi. nl/satrep Sat. Rep Manual, Case Studies, Catastrophic cases, 06 -13 Aug 2002 Flooding over central Europe) BUT 01. 06. 05 • MSG SEVIRI channels can also be used to monitor the extent of floods • Channels 1 -3 (0. 6, 0. 8 and 1. 6µm) and the HRV are the basic channels for flood detection • Vegetation index (channels 0. 6 and 0. 8 µm) of AVHRR like instruments has been used traditionally for flood detection. • SEVIRI offers some additional tools for floods – examples on following pages 2

Example Flooded rice fields in Italy 24 th Apr 2003 Situation before: only MET-7 VIS available - Some indication of flood can be seen South of Alps northeast of Italy 01. 06. 05 3

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI 0. 6µm channel 09: 00 UTC • Nothing much to be seen alone 01. 06. 05 4

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI 0. 8 µm channel 09: 00 UTC • Flooded area can be seen pretty well • This channel is reflecting vegetation very well and water is black 01. 06. 05 5

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI 1. 6 µm channel 09: 00 UTC • Flooding area visible even better than with 0. 8 01. 06. 05 6

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI rgb combination of 1. 6, 0. 8 and 0. 6µm channels 09: 00 UTC • Flooded area quite distinct, but the resolution – is there anything to correct that? 01. 06. 05 7

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI HRV channel 11: 00 UTC • The resolution is now much better 01. 06. 05 8

Example Flooded rice fields in Italy 24 th Apr 2003 • SEVIRI 1. 6 combined twice with HRV channel 11: 00 UTC • This is giving the best resolution and detection 01. 06. 05 9

Example Floods in Angola and Zambia 3 rd Feb 2004 01. 06. 05 10

Example Floods in Angola and Zambia 3 rd Feb 2004 11: 30 01. 06. 05 11

Example Floods in Angola and Zambia 3 rd Feb 2004 11: 30 01. 06. 05 12

Example Floods in Angola and Zambia 3 rd Feb 2004 11: 30 01. 06. 05 13

Example Floods in Romania 26 th Jul 2005 12: 00 Meteosat 8 HRV channel right AVHRR below left Red circle shows flooded area 01. 06. 05 14