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Major Dust Storm East of Bam, Iran
Published February 25, 2004
This stunning photo shows a major dust storm raging in the Kerman Desert, just east of the city of Bam in Southeastern, Iran. The image was acquired by the crew of the International Space Station on the afternoon of February 15, 2004, using a digital camera with a 50-mm lens.
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Thinning Upper Atmosphere
Published February 23, 2004
From a vantage point about 360 km (225 miles) over the Earth, Space Station crewmembers photographed the crescent moon through the upper layers of Earth’s atmosphere. At the bottom of the image, a closed deck of clouds is probably at about 6 km (3 miles). The shades of blue grading to black are caused by the scatter of light as it strikes gas molecules of the very low density upper atmosphere.
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Pangue Dam, BÃobÃo River, Chile
Published February 16, 2004
Chile’s Bíobío River flows northwestward from the high Cordillera of the Andes to the Pacific Ocean near Concepción, about 450 kilometers south of Santiago. The river is known globally for spectacular white-water rafting. This image shows a section of the river that skirts around Callaqui volcano in the Andes, and features the Pangue Dam and reservoir filling a narrow, meandering segment of the Bíobío River valley. Completed in 1996, the dam is the first of six hydroelectric dams planned by ENDESA, a Chilean utility company. The future development of the Bíobío River is a point of intense debate among Chileans, and has been called Chile’s “defining environmental issue.”
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100,000 Earth Photographs from the International Space Station
Published February 9, 2004
This image of the El Paso-Juárez area on the U.S.-Mexico border is the 100,000th photograph of Earth that astronauts have taken from the International Space Station. It was taken on January 26, 2004, by Expedition 8 crewmembers. The Rio Grande can be seen meandering through the area, forming the boundary between the sister cities of El Paso, Texas and Juárez, Chihuahua. North is to the right in this image, and the setting sun has cast the east side of the Sierra Juárez and Franklin Mountains into shadow.
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Glacial Retreat in Argentina
Published February 2, 2004
For the crew onboard the International Space Station daylight views of the Earth’s Southern Hemisphere offer fewer opportunities to observe and document land features with onboard cameras. However, South America’s Patagonian Ice Fields and glaciers in the far southern Andes mountains offer beautiful, dynamic features with frequent passes whenever weather conditions permit. On the afternoon of January 3, 2004, the crew took this view of the Upsala Glacier in Argentina. A worldwide retreat of glaciers was observed during the twentieth century and most of the Patagonia’s glaciers, including Upsala, were no exception.
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Five-Year-Old Icebergs near South Georgia Island
Published January 26, 2004
These photographs, taken from the International Space Station in January, 2004, show two pieces of a massive iceberg that broke off from the Ronne Ice Shelf in October, 1998. The pieces of iceberg A-38 have floated relatively close to South Georgia Island. After 5 years and 3 months adrift, they are approximately 1,500 nautical miles from their origin. In the oblique image, taken a few minutes later, the cloud pattern reveals the impact of the mountainous islands on the local wind field. At this time, the icebergs are sheltered in the lee side of the island.
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Effect of Drought on Great Salt Lake
Published January 19, 2004
Great Salt Lake serves as a striking visual marker for astronauts orbiting over North America. A sharp line across its center is caused by the restriction in water flow from the railroad causeway. The eye-catching colors of the lake stem from the fact that Great Salt Lake is hypersaline, typically 3–5 times saltier than the ocean, and the high salinities support sets of plants and animals that affect the light-absorbing qualities of the water. Space Station astronauts have recorded the decline in lake levels in response to a regional 5-year drought taking both detailed views and broad views of the entire lake. As lake levels have declined the salt works have become islands in the middle of a dry lakebed.
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Measuring Water Depth from the International Space Station
Published January 12, 2004
Looking out the window of the International Space Station, astronauts often take the time to admire and photograph tropical islands and coral reefs. From an altitude of 400 kilometers and with only a digital camera as a tool, it seems impossible to make detailed measurements of the depth of underwater features. However, a new technique developed by NOAA scientists has done just that—plotted the depths of lagoon features at Pearl and Hermes Reef, northwest Hawaii, using digital astronaut photography from the International Space Station (ISS).
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Photographs of Auroras from Space
Published January 5, 2004
If Iris, the goddess of the rainbow, had a sister she would be the goddess of Aurora. Glowing green ripples form arcs that constantly transform their shape into new glowing diaphanous forms. There is nothing static about auroras. They are always moving, always changing, and like snowflakes, each display is different from the last.
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The Many Faces of Mount Everest
Published December 29, 2003
Over the years, astronauts have used various viewing angles and lenses to capture the many faces of Everest. Differing seasons and illumination allow for very different, but always spectacular perspectives. The astronauts on the International Space Station obtained this view of Mt. Everest in late November 2003.
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Lake Titicaca
Published December 22, 2003
Lake Titicaca, at an elevation of 12,507 feet (3,812 meters) in the Andean Altiplano, is the highest large lake in the world. More than 120 miles long and 50 miles wide, it was the center of the Incan civilization, and today straddles the boundary between Peru and Bolivia.
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Water Boundaries
Published December 15, 2003
The South Atlantic Ocean off the coast of Argentina and Uruguay is a rich mixing bowl of different water masses. The nutrient-rich waters from the combined Paraná and Uruguay Rivers empty into the South Atlantic through the Rio de la Plata. Under the right conditions, especially in spring and early summer, the nutrients fertilize the offshore surface waters allowing for large plankton blooms. This unique image captures traces of several different water masses just southeast of Montevideo, Uruguay, and the Rio de la Plata. Close to the coast of Uruguay, the muddy fresh water plume snakes along the coast. Farther offshore, broad swirls of light blue-green and darker water mark a bloom of plankton. To the right, deep blue water covered by puffy clouds suggests another, warmer water mass just north of the bloom.
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