James Rennell Division
Large scale modelling
OCCAM scientific posters
The FRAM Atlas
By clicking on the highlightex below you can download two Quicktime movie loops showing the behaviour of the OCCAM model between years 8.0 and 12.0 of the model run. The original video loop took up 400 Mb, which is a bit too large for most people to download over the network. We have therefor subsampled the image and also used compresssion software which looses some of the detail.
The two loops are:
: showing the global ocean surface temperature field over a four year period. (4 Mb file)
Higher resolution clip
: showing the ocean surface temperature field at higher resolution from the central region of the first clip. (4 Mb file)
So what to look out for?
The movie loops show a rotating globe with, in the bottom right hand corner a 'clock' showing the passage of months and years in the model run. below this is the 'day number' of the OCCAM model run. The surface temperature is shown by colour, the colour bar on the right hand side running from -1.7 degrees centigrade to +30 degrees Centigrade
- The warm North Atlantic, with the North Atlantic Drift carrying warm water past Norway into the cold Arctic.
- The strong Gulf stream running northwards along the east coast of the US. There are two other strong western boundary currents, the Kuroshio off the east coast off Japan and the Agulhas Current off SE Africa. The Brazil Current off Brazil/Argentina and the East Australian Current are also western boundary currents but tend to be weaker.
- The North Pacific. At high altitudes this is cooler than the North Atlantic and it has a pronounced seasonal signal.
- The "Warm Pool" of the Western Central Pacific. This is the warmest region of the open ocean, the amount of heat and water vapour transferred to the atmosphere making it the primary heat engine driving the weather and the El Nino.
- The complex currents of the Indian Ocean due to the Monsoons.
- The Tropical Instability Waves which form along the equator in the Eastern Pacific at the end of the northern summer.
- The eddy fields generated by all the strong ocean currents.
- The strong temperature gradient across the Antarctic Circumpolar Current. The is the largest of the ocean currents. It carries about six times as much water as the Gulf Stream.
- The steering of the Antarctic Circumpolar Current by the deep topography of the ocean. Currents in the cold water regions of the oceans, where the stratification is weak, are strongly affected by topography
Finally if you really must have the full video loop for your work or teaching, contact David Webb or Beverly de Cuevas.
Last updated by David Webb.