Wind statistics offshore based on satellite images Charlotte Bay Hasager, Merete Badger, Poul Astrup, Morten Nielsen, Ioanna Karagali, Risø DTU Alexis Mouche, CLS, France
Content Offshore sites QuikSCAT analysis Envisat SAR analysis Future 2 Risø DTU, Technical University of Denmark
Norsewind: project domain for offshore wind 3 Risø DTU, Technical University of Denmark
Wind map: QuikSCAT - morning 4 Risø DTU, Technical University of Denmark
Wind map: QuikSCAT afternoon 5 Risø DTU, Technical University of Denmark
Comparison at Horns Rev Mast (courtesy DONG energy) Hasager, C.B. A.Peña, M.B.Christiansen, P.Astrup, M.Nielsen, F.Monaldo, D.R.Thompson, and P.Nielsen. "Remote sensing observations used in wind energy." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 1, no. 1(2008):76-79 6 Risø DTU, Technical University of Denmark QuikSCAT
Average Wind Speed: Morning (based on wind direction at Horns Rev) 16 Directions NW: Morning 5 6 7 8 9 10 11 12 13 14 15 7 Risø DTU, Technical University of Denmark
NNW: Morning 5 6 7 8 9 10 11 12 13 14 15 8 Risø DTU, Technical University of Denmark
NNE: Morning 5 6 7 8 9 10 11 12 13 14 15 9 Risø DTU, Technical University of Denmark
NE: Morning 5 6 7 8 9 10 11 12 13 14 15 10 Risø DTU, Technical University of Denmark
EN: Morning 5 6 7 8 9 10 11 12 13 14 15 11 Risø DTU, Technical University of Denmark
ENE: Morning 5 6 7 8 9 10 11 12 13 14 15 12 Risø DTU, Technical University of Denmark
ESE: Morning 5 6 7 8 9 10 11 12 13 14 15 13 Risø DTU, Technical University of Denmark
ES: Morning 5 6 7 8 9 10 11 12 13 14 15 14 Risø DTU, Technical University of Denmark
SE: Morning 5 6 7 8 9 10 11 12 13 14 15 15 Risø DTU, Technical University of Denmark
SSE: Morning 5 6 7 8 9 10 11 12 13 14 15 16 Risø DTU, Technical University of Denmark
SSW: Morning 5 6 7 8 9 10 11 12 13 14 15 17 Risø DTU, Technical University of Denmark
SW: Morning 5 6 7 8 9 10 11 12 13 14 15 18 Risø DTU, Technical University of Denmark
WS: Morning 5 6 7 8 9 10 11 12 13 14 15 19 Risø DTU, Technical University of Denmark
WSW: Morning 5 6 7 8 9 10 11 12 13 14 15 20 Risø DTU, Technical University of Denmark
WNW: Morning 5 6 7 8 9 10 11 12 13 14 15 21 Risø DTU, Technical University of Denmark
WN: Morning 5 6 7 8 9 10 11 12 13 14 15 22 Risø DTU, Technical University of Denmark
Wind maps ~ 30 morning ~ 30 afternoon 23 Risø DTU, Technical University of Denmark
Average Wind Speed: Afternoon (based on wind direction at Horns Rev) 16 Directions NW: Afternoon 5 6 7 8 9 10 11 12 13 14 15 24 Risø DTU, Technical University of Denmark
Diurnal wind speed variation Vindeby in Baltic Sea Horns Rev in the North Sea Sampling times: red vertical QuikSCAT and black Envisat ASAR Norma alised wind speed 1.04 1.02 1 0.98 Vindeby Horns Rev 0.96 0 2 4 6 8 10 12 14 16 18 20 22 Hour (Barthelmie & Pryor 2003: J. Applied Meteorology 42, 83-94) 25 Risø DTU, Technical University of Denmark
Average Wind Speed: Difference (based on wind direction at Horns Rev) 16 Directions Morning minus Afternoon NW: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 26 Risø DTU, Technical University of Denmark
Morning minus Afternoon NNW: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 27 Risø DTU, Technical University of Denmark
Morning minus Afternoon NNE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 28 Risø DTU, Technical University of Denmark
Morning minus Afternoon NE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 29 Risø DTU, Technical University of Denmark
Morning minus Afternoon EN: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 30 Risø DTU, Technical University of Denmark
Morning minus Afternoon ENE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 31 Risø DTU, Technical University of Denmark
Morning minus Afternoon ESE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 32 Risø DTU, Technical University of Denmark
Morning minus Afternoon ES: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 33 Risø DTU, Technical University of Denmark
Morning minus Afternoon SE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 34 Risø DTU, Technical University of Denmark
Morning minus Afternoon SSE: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 35 Risø DTU, Technical University of Denmark
Morning minus Afternoon SSW: Difference -1-0.8-0.6-0.4-0.2 0 0.2 0.4 0.6 0.8 1 36 Risø DTU, Technical University of Denmark
Morning minus Afternoon SW: Difference -1-0.8-0.6-0.4-0.2 0 0.2 0.4 0.6 0.8 1 37 Risø DTU, Technical University of Denmark
Morning minus Afternoon WS: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 38 Risø DTU, Technical University of Denmark
Morning minus Afternoon WSW: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 39 Risø DTU, Technical University of Denmark
Morning minus Afternoon WNW: Difference -2-1.5-1 -0.5 0 0.5 1 1.5 2 40 Risø DTU, Technical University of Denmark
Morning minus Afternoon WN: Difference Afternoon -25 6-1.5 7-1 8-0.5 9 10 0 11 0.5 12 1 13 1.5 14 15 2 41 Risø DTU, Technical University of Denmark
Sea surface temperature: 30 August 2009 42 Risø DTU, Technical University of Denmark
Wind map from Envisat ESE: Morning Processed at Risø DTU/ JHU APL. 400 km wide swath 5 6 7 8 9 10 11 12 13 14 15 Lat titude ESE: Afternoon See http://www.risoe. dtu.dk/business_r elations/products_ Services/Software/ VEA_windmaps.as px 5 6 7 8 9 10 11 12 13 14 15 43 Risø DTU, Technical University of Denmark
Wind map from Envisat from 400 km wide swath Processed at NW: Morning CLS, France using the SOPRANO. 5 6 7 8 9 10 11 12 13 14 15 NW: Afternoon Lat titude See http://soprano.cls.fr/ 5 6 7 8 9 10 11 12 13 14 15 44 Risø DTU, Technical University of Denmark
Future 1. Detailed analysis of coastal, diurnal wind variations (QuikSCAT and Envisat) 2. Detailed analyis of offshore wind and sea surface temperature 3. Comparison to observations (EU-Norsewind) 4. Comparison to mesoscale model results (EU-Norsewind) Further references: Hasager et al. 2009 Satellite winds in EU-Norsewind, EWEC 2009 Scientific proceedings (ISBN: ), pages: 144-147. www.norsewind.eu 45 Risø DTU, Technical University of Denmark