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ISS012-E-6468

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Identification

Mission: ISS012 Roll: E Frame: 6468 Mission ID on the Film or image: ISS012
Country or Geographic Name: BOLIVIA
Features: LAKE POOPO, RELICT SHORELINES
Center Point Latitude: -19.0 Center Point Longitude: -67.0 (Negative numbers indicate south for latitude and west for longitude)
Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: 7
Camera Focal Length: 180mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.

Quality

Film Exposure:
Percentage of Cloud Cover: 10 (0-10)

Nadir

Date: 20051103 (YYYYMMDD)GMT Time: 181409 (HHMMSS)
Nadir Point Latitude: -19.4, Longitude: -67.1 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: North
Sun Azimuth: 273 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 189 nautical miles (350 km)
Sun Elevation Angle: 61 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 3764

Captions

Lake Poopó Water Levels

High-resolution images:
ISS012-E-6468 (300 kB JPEG)
ISS012-E-6469 (330 kB JPEG)
ISS012-E-20585 (270 kB JPEG)

Lake Poopó sits high in the Bolivian Andes, catching runoff from its larger neighbor to the north—Lake Titicaca (not shown)—by way of the Desaguadero River, which is the muddy area at the north end of the lake. Because Lake Poopó is very high in elevation (roughly 3,400 meters, or 11,000 feet above sea level), very shallow (generally less than 3 meters, or 9 feet), and the regional climate is very dry, small changes in precipitation in the surrounding basin have large impacts on the water levels and area of Lake Poopó. When the lake fills during wet periods, it drains from the south end into the Salar de Coipasa salt flat (not shown). Water levels in Lake Poopó are important because the lake is one of South America’s largest salt-water lakes, making it a prime stop for migratory birds, including flamingoes. The lake has been designated as a RAMSAR site.

These photographs were taken in November 2005 (whole lake) and March 2006 (detail) by the Expedition 12 crew of the International Space Station. In November, water levels had dropped, exposing large tracts of salt and mud flats. A wet and cool period between December 2005 and the end of February 2006 resulted in flooding of Poopó with muddy waters from the Desaguadero River. The area of the March 9 photograph is indicated on the November 3 mosaic by a white polygon. Comparison of the photographs shows the extent of flooding of the western salt flats—sufficient to create an ephemeral island. The ISS crew is tasked to track such changes, which are related to regional weather patterns. Lake Poopó’s sensitivity to precipitation in the high Andes (possibly reflecting larger climate cycles) provides an excellent visual indicator of weather and climate trends.

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