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Jupiter's shrinking red spot
Date:11/19/2008

s into account (and the much easier-to-deal-with factor of the planet's rotation) and have calculated the best velocity maps yet for the surface of Jupiter.

Using data recorded by the Galileo and Cassini spacecraft, views of Jupiter's surface have been made that essentially factor out the planet's rotation, simplifying our impression of what is happening to the cloud decks. For mid latitudes, the velocity resolution for this mapping procedure is 3 meters-per-second. For higher latitudes, the resolution is 3-6 meters-per-second. The maps consist of tens of millions of velocity measurements.

According to Berkeley scientist Xylar Asay-Davis these maps represent the highest resolution and highest accuracy full-planet map ever produced. With this approach, such meteorological features as the Great Red Spot or the Red Oval can be monitored more carefully than before. The high-precision velocity measurements show definitively that the Great Red Spot has shrunk over the past dozen years, says Asay-Davis.

Asay-Davis's talk, "Velocity Fields of Jovian Dynamical Features using the Advection Corrected Correlation Image Velocimetry Method" will be held at 8:13 a.m. on Sunday, November 23, 2008, in Ballroom B of the San Antonio Convention Center. Abstract: http://meetings.aps.org/Meeting/DFD08/Event/89732.

2) THE PHYSICS OF OIL SPILL CLEANUPS

Oil spills are a major environmental problem because they often occur at sea and in remote, ecologically-sensitive areas where their impact on birds, sea mammals and subsurface life may last for years. The best way to mitigate this damage is to clean up spills immediately, and typically this starts with skimming off as much oil as possible. Such cleanups may leave large areas covered with a thin slick of spilled oil, which is often dispersed by spraying the spill area with chemical "surfactants" that break the film into
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Contact: Jason Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

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