Topic: NASA’s Goddard Institute for Space Studies

NASA scientists report on long term Global Warming Trend

January 16, 2013 |

Written by Dr. Tony Phillips
Science at NASA

Washington, D.C. – NASA scientists say 2012 was the ninth warmest of any year since 1880, continuing a long-term trend of rising global temperatures. With the exception of 1998, the nine warmest years in the 132-year record all have occurred since 2000, with 2010 and 2005 ranking as the hottest years on record.

NASA’s Goddard Institute for Space Studies (GISS) in New York, which monitors global surface temperatures on an ongoing basis, released an updated analysis Tuesday that compares temperatures around the globe in 2012 to the average global temperature from the mid-20th century. The comparison shows how Earth continues to experience warmer temperatures than several decades ago.

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NASA’s Cassini Spacecraft reveals vortex in the upper atmosphere of Saturn’s moon Titan

July 11, 2012 |

Written by Jia-Rui C. Cook
NASA’s Jet Propulsion Laboratory

Pasadena, CA – Images from NASA’s Cassini spacecraft show a concentration of high-altitude haze and a vortex materializing at the south pole of Saturn’s moon Titan, signs that the seasons are turning on Saturn’s largest moon.

“The structure inside the vortex is reminiscent of the open cellular convection that is often seen over Earth’s oceans,” said Tony Del Genio, a Cassini team member at NASA’s Goddard Institute for Space Studies, NY. “But unlike on Earth, where such layers are just above the surface, this one is at very high altitude, maybe a response of Titan’s stratosphere to seasonal cooling as southern winter approaches. But so soon in the game, we’re not sure.”

This true color image captured by NASA’S Cassini spacecraft before a distant flyby of Saturn’s moon Titan on June 27th, 2012, shows a south polar vortex, or a mass of swirling gas around the pole in the atmosphere of the moon. (Image credit: NASA/JPL-Caltech/Space Science Institute)

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NASA’s Cassini Spacecraft shows Saturn’s own internal heat drives it’s Jet Streams, not the Sun

June 26, 2012 |

Written by Jia-Rui C. Cook
NASA’s Jet Propulsion Laboratory

Pasadena, CA – Turbulent jet streams, regions where winds blow faster than in other places, churn east and west across Saturn. Scientists have been trying to understand for years the mechanism that drives these wavy structures in Saturn’s atmosphere and the source from which the jets derive their energy.

In a new study appearing in the June edition of the journal Icarus, scientists used images collected over several years by NASA’s Cassini spacecraft to discover that the heat from within the planet powers the jet streams.

A particularly strong jet stream churns through Saturn’s northern hemisphere in this false-color view from NASA’s Cassini spacecraft. (Image Credit: NASA/JPL-Caltech/SSI)

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