Data
Products.- Data access services.
- FTP.
- Data extraction tool.
- Live Access Server (LAS).
- Lively data.
- 2008.
- 2007.
- 2006.
- 2005.
- 2004.
- 2003.
- Dec. 22, 2003: Longitude-time diagram (2).
- Dec. 8, 2003: Change of units.
- Nov. 24, 2003: A temporal ocean slice.
- Nov. 10, 2003: Different points of view.
- Oct. 20, 2003 : Averaging an area.
- Oct. 6, 2003: Variance.
- Sep. 22, 2003: Along-time data.
- Sep. 8, 2003: Digging into the data.
- Aug. 18, 2003: Coloring the data.
- Aug. 11, 2003: Four seasons in the Atlantic.
- Aug. 4, 2003: Having a closer look.
- July 28, 2003: North Atlantic eddies .
- July 21, 2003: Tracking El Niño .
- July 15, 2003: Question of resolution .
- July 7, 2003: Scaling the ocean .
- June 30, 2003: South of Africa, currents and sea level heights .
- Access Aviso LAS.
- Opendap.
- Media.
- Tools.
- Product information.
- Operational news.
A temporal slice
Lively Data : November 24, 2003
"Longitude-Time" (or "Hovmoller") diagrams are a way to see the moves of some phenomena along time. Periodic phenomena, for example, are tranlated by parallel lines. Rossby and Kelvin waves (cf Applications: Waves across the water) are thus visible. Their role in the El Niño phenomenon makes this visualization useful, since you can see the East-West propagation clearly.
Merged sea level anomalies Hovmoller diagrams over the Tropical Pacific, from August 2001 to October 2003, at the Equator (left, automatic color scale; right, forced to -20 cm/+20 cm, see Lively data for July 7,2003). To plot such diagrams,you need, after choosing a variable, to select "xt (hovmoller) slice" in "select view" (default is "xy (lat/lon) slice"), choose a latitude and interesting longitudes (here 140°E-80°W, i.e. the whole Pacific width). Then, you can choose a period.
- Another example, at 29°S, in the Indian Ocean.
Use the Live Access Server