Prediction of Storm Surge using Space Data. Susanne Lehner German Aerospace Center

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1 Prediction of Storm Surge using Space Data Susanne Lehner German Aerospace Center

2 Existing Crisis Information

3

4 State of the Art of Satellite Crisis Information (ZKI) Mapping after the storm For Forecast: Global Sat Data at Weather Centers in Routine Use, Needed: Improvement of Measurements for Wind and Waves in Storms as well as better assimilation schemes Needed: NRT Delivery Schemes for Measurements from SAR Image Data, e.g. ENVISAT ASAR for hurricanes and typhoons In near Coastal Areas high resolution X-Band Data are newly available for better Topography, Input Wind Field, Near Shore Sea State, up to now NRT only for ship detection Folie 4

5 Existing: Use of Satellite Altimeter Data at DWD Data Assimilation ERS-2 JASON ENVISAT Radar Altimeter significant wave height, wind speed Quality Control Interpolation Thomas Bruns, DWD Folie 5

6 New: Sea State from Double Tracks of Altimeter and SAR both on ENVISAT DWD RA SAR RA SAR X. Li et al Red DWD Blue SAT X. Li et al IEEE TGARS Folie 6

7 New: Coastal Images from SAR Data Fast Delivery of Wind and Sea State - 15 Minutes L1b product ftp delivery n Neustrelitz Ground Station acquire downlink and archiving Gbit-DAS n Processing System PGS n frames on downlink real time, archiving starts 10 sec delayed 20 sec per frame format conversion 70 sec per frame processing 200 sec per frame 15 sec per frame user order user user notification AIS user data ftp delivery on user account AIS data base 20 sec per frame ship-detection Processing AIS matching 150 sec per frame Folie 7

8 Island of Ruegen Germany NRT delivery 15 minutes ERS km x 100 km Pixelsize 12 meter May, 05, :08 UTC Isand of Rügen (Germany) Folie 8

9 Horizontal Mask Neustrelitz for TerraSAR-X and ERS-2 Folie 9

10 Image Data needed in Near Real Time for improved Modelling of Storm Surges: Wind Speed (CMOD) Sea State (CWAVE) Sea Level Currents In near Coastal Areas high resolution X-Band Data TS-X Elbe Estuary Folie 10

11 100 km Sep. 14, 2009 at 14: 22 UTC Typhoon Jujue MODIS on Sep.13, 2009 Folie 11

12 Sea State derived by CWAVE for typhoon Juje ENVISAT ASAR Image Mode 100 km x 100 km Sep. 14, 2009 at 14: 22 UTC Typhoon Jujue Folie 12 Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum Remote Sensing Technology Institute

13 Cold Air Outbreak - Radar and Optical Images of ENVISAT MERIS FR LEVEL 2 aquired on Nov 01, 2006 MSG-1 image acquired on Nov 1, 2006, 10:30 UTC FiNO Platform damaged 0 25 ASAR WSM acquired on Nov 1, :26 UTC wind field superimposed Folie 13 S. Brusch et al. IEEE JSTAR

14 Wind as a forcing for waves and currents from High resolution TSX- Data, XMOD Algorithm See Poster A. Pleskachevsky Folie 14

15 1. Validation: Wind as a forsing for waves and currents validation study :wind incorporated into wave modeling original wind W W+3m/s, W-3m/s Collocation by bouy measuremets Folie 15

16 TerraSAR-X high resolution data 1 km Swell ~ m wavelenght wind sea wind Helgoland: Spotlight acquired on Folie 16 Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum Remote Sensing Technology Institute

17 Coastal protection, calculation of Wave Energy Flux Wave energy flux FLUX = E C g [J/m s] E = f(h s2 ) wave energy density per unit horizontal area C g = f(t,l) wave group velocity Helgoland: cliff Large Anna coastal protection Cliff Lagre Anna [J/m s] Hs swell ~ 1m, derived using XWAVE algorithm (DLR) L ~ [ m] every 5 points in the track are averaged Wave energy flux along the track Folie 17

18 Bathymetry Elbe Estuary TerraSAR-X Stripmap Mode Elbe Estuary HH-Polarisation Resolution: 3m Nov, :10 UTC low tide Bottom Topography Elbe 2006 (source: Federal Waterways Engineering and Research Institute, [BAW-Germany]) TerraSAR-X Stripmap Mode Elbe Estuary HH-Polarisation Resolution: 3m Nov, :01 UTC high tide PhD Position available! Folie 18

19 Conclusion and Outlook Define SAR Wind and Wave Products for storms from SAR Image data Needed: Improvement of Measurements for Wind and Waves in Storms Near Real Time Delivery to Weather Centers and Government Agencies In near Coastal Areas high resolution X-Band Data for better Topography, Input Wind Field, Near Shore Sea State As well: Provide Maps for Search and Rescue after the event Folie 19

20 Take Care! Storm over Scotland 13-Jan-2007 Folie 20 Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum Remote Sensing Technology Institute

21 Typhoon Marcel over Taiwan Have a Safe Trip home! Folie 21

22 Typhoon maximum wind speed Sep KIKO Sep A.Reppucci et al IEEE TGARS 2010 Folie 22

23 wave height shoaling shoaling shadowing refraction refraction shoaling refraction shadowing K-wave model on mesh 100x100m horizontal resolution Folie 23

24 Wind field of Koppu on Sep.14, :50 UTC 22:30 UTC Folie 24

25 Wadden Sea North Sea Multitemporal view of TerraSAR X Stripmap Folie 25

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