NASA views our perpetually moving ocean

Apr 10, 2012 By Alan Buis and Aries Keck
A new NASA animation shows the global movement of Earth's ocean surface currents from June 2005 to December 2007. The animation was created using data from NASA satellites, direct ocean measurements and a numerical model developed by NASA JPL and the Massachusetts Institute of Technology. Credit: NASA/SVS

(Phys.org) -- The swirling flows of Earth's perpetually changing ocean come to life in a new NASA scientific visualization that captures the movement of tens of thousands of ocean currents.

"There is also a 20-minute long tour, which shows these global surface currents in more detail," says Horace Mitchell, the lead of the studio. "We also released a three-minute version on our NASA Visualization Explorer iPad app."

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Both the 20-minute and 3-minute versions are available in high definition here.

The visualization covers the period June 2005 to December 2007 and is based on a synthesis of a with observational data, created by a NASA project called Estimating the Circulation and Climate of the , or ECCO for short. ECCO is a joint project between the Massachusetts Institute of Technology and NASA's Jet Propulsion Laboratory in Pasadena, Calif. ECCO uses advanced to combine observations with the MIT numerical ocean model to obtain realistic descriptions of how evolves over time.

These model-data syntheses are among the largest computations of their kind ever undertaken. They are made possible by high-end computing resources provided by NASA's Ames Research Center in Moffett Field, Calif.

ECCO model-data syntheses are being used to quantify the ocean’s role in the global carbon cycle, to understand the recent evolution of the polar oceans, to monitor time-evolving heat, water, and chemical exchanges within and between different components of the Earth system, and for many other science applications.

In the particular model-data synthesis used for this visualization, only the larger, ocean basin-wide scales have been adjusted to fit observations. Smaller-scale are free to evolve on their own according to the computer model's equations. Due to the limited resolution of this particular model, only the larger eddies are represented, and tend to look more 'perfect' than they are in real life. Despite these model limitations, the visualization offers a realistic study in both the order and the chaos of the circulating waters that populate Earth’s ocean.

Data used by the ECCO project include: sea surface height from NASA's Topex/Poseidon, Jason-1, and Ocean Surface Topography Mission/Jason-2 satellite altimeters; gravity from the NASA/German Aerospace Center Gravity Recovery and Climate Experiment mission; surface wind stress from NASA's QuikScat mission; sea surface temperature from the NASA/Japan Aerospace Exploration Agency Advanced Microwave Scanning Radiometer-EOS; sea ice concentration and velocity data from passive microwave radiometers; and temperature and salinity profiles from shipborne casts, moorings and the international Argo ocean observation system.

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baudrunner
not rated yet Apr 10, 2012
Brilliant! Analogy to the bands around the larger planets of our solar system cannot be understated. The atmospheres of Jupiter, Saturn, Uranus, and Neptune all demonstrate the same fluidic behaviour. Very cool.
baudrunner
not rated yet Apr 11, 2012
Speaking about how ocean currents change over time, maybe you guys at NASA could develop an algorithm to give us information about more ancient times. I think that there must be a pattern that takes us back to the time of the biblical flood. According to my readings, that should be about 13,950 years ago.

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