1. Nowcasting ocean surface currents Madeleine Cahill 19 June 2008 Wealth From Oceans

2. 2. June, 2007 Velocities in excess of 1.5m/s observed just north of NW Cape much greater than speeds associated with mesoscale processes in the region appear to be related to small- scale vorticies O(20km)

3. 3. Analysis height map and geostrophic velocities May 21 2008 map of total height Infer velocities assuming geostrophy

4. 4. Available height data Time and location of available height data can be limiting

5. 5. Height anomaly map May 21,2008 using altimeter and tidegauge height High along track resolution but large distances between tracks - determines the length scale of the mapping Mapping is constrained at the coast with the tidegauges

6. 6. Height anomaly map including MCC vectors from SST Including MCC vectors from Ian Barton

7. 7.1 day composite SST May 22, 2008 MCC vectors are associated with northward intrusion of cold water

8. 8. Now add mean height – Ken Ridgway and Andreas Schiller OFAM – global model, 0.1° resolution in this region. Bluelink OFAM Fusion

9. 9. May 21 2008 height and geostrophic velocities

10. 10. Right now, June 17, 2008 Similar conditions to 2007 but small vortex doesn’t appear to be spinning

11. 11. Fusion – OFAM mean

12. 12. Fusion – BRAN

13. Thank you Business Unit Name Presenter’s name Presenter’s title Phone: +61 3 9545 2176 Email: name.name@csiro.au Web: www.csiro.au/group Business Unit Name Presenter’s name Presenter’s title Phone: +61 3 9545 2176 Email: name.name@csiro.au Web: www.csiro.au/group Contact Us Phone: 1300 363 400 or +61 3 9545 2176 Email: Enquiries@csiro.au Web: www.csiro.au