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Klyuchevskaya Volcano
The Klyuchevskaya Volcano on Russia’s Kamchatka Peninsula continued its ongoing activity by releasing another plume on May 24, 2007. The same day, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image, at 01:00 UTC. In this…
Cassini Significant Events 05/16/07 – 05/22/07
Cassini Significant Events 05/16/07 – 05/22/07 May 25, 2007 (Source: Cassini Project) The most recent spacecraft telemetry was acquired on Tuesday, May 22, from the Goldstone tracking complex. The Cassini spacecraft is in an excellent state of health and all…
Seasonal Swings in Amazon Leaf Area
Botanists have long understood the behavior of temperate forests. In the autumn, trees lose their leaves; in the spring, they grow a fresh set. In rainforests around the equator, where seasons fall into categories of dry and wet and forests…
Leaf Area Index, South America
The Amazon Rainforest is a tangle of multiple layers of vegetation stretching from the ground to the top of the forest canopy. Layer upon layer of leaves intercept sunlight, inhale carbon dioxide, and exhale oxygen and water vapor. In 2007,…
Dust Plume off the Coast of Egypt
Dwarfing the Nile, a river of dust flowed out of the deserts of northern Egypt on May 19, 2007. This image of the dust shows it spreading northward over the Mediterranean Sea from the sandy deserts that span the country.…
Cassini ‘Cat Scan’ Maps Clumps in Saturn’s Rings
Cassini ‘Cat Scan’ Maps Clumps in Saturn’s Rings May 22, 2007 (Source: JPL/University of Central Florida, Orlando) This false-color image of Saturn’s main rings was made by combining data from multiple star occultations using the Cassini ultraviolet imaging spectrograph. Saturn’s…
Springtime Comes to the Niagara River
The eastern end of Lake Erie is clogged with ice that is pushed against the shoreline by the prevailing westerly wind. The ice collects in Lake Erie, and the Lake Erie-Niagara River Ice Boom prevents it from flowing down the…
Driving Ban Lowers Beijing Pollution
In an effort to control smog during the 2008 Olympics, Beijing officials instituted a number of pollution-curbing measures.
Nevado del Huila, Colombia
Nevado del Huila Volcano in Colombia is actually a volcanic chain running north to south, capped by a glacier. With peaks ranging in height from 2,600 to 5,780 meters (8,530 to 18,960 feet), Nevado del Huila is a stratovolcano composed…
Smog Yellows Taj Mahal
Built as a monument to the favorite wife of the Mughal Emperor Shah Jahan, the Taj Mahal has watched over the city of Agra, India, since the mid-seventeenth century with its pillars of gleaming white marble. By the spring of…
Changes to the Saemangeum Estuary, South Korea
Satellite imagery illustrates the beginning of a land reclamation project that will transform one of the largest tidal estuaries along the Yellow Sea into farmland and a fresh-water reservoir.
Cassini Significant Events 05/09/07 – 05/15/07
Cassini Significant Events 05/09/07 – 05/15/07 May 17, 2007 (Source: Cassini Project) The most recent spacecraft telemetry was acquired on Tuesday, May 15, from the Goldstone tracking complex. The Cassini spacecraft is in an excellent state of health and all…
Ireland
Between 51.5 and 55.5 degrees north latitude, Ireland could easily find itself buried in snow during the winter, but the island’s average temperature in January is 7 degrees Celsius (45 degrees Fahrenheit). Ireland’s mild climate results from the influence of…
Frictional Heating Explains Plumes on Enceladus
Frictional Heating Explains Plumes on Enceladus May 16, 2007 (Source: Jet Propulsion Laboratory/University of Santa Cruz) Shear Heating on Enceladus Pasadena, Calif.–Rubbing your hands together on a cold day generates a bit of heat, and the same process of frictional…
Cracks on Enceladus Open and Close Under Saturn’s Pull
Cracks on Enceladus Open and Close Under Saturn’s Pull May 16, 2007 (Source: Goddard Space Flight Center) Cracks in the icy surface of Saturn’s moon Enceladus open and close daily under the pull of Saturn’s gravity, according to new calculations…
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