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Lake Chad 2001
Title Lake Chad 2001
Abstract Sweep of Lake Chad, February 2001. Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad 2001
Title Lake Chad 2001
Abstract Sweep of Lake Chad, February 2001. Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1973 t …
Title Lake Chad Evaporation 1973 to 1987
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1973 t …
Title Lake Chad Evaporation 1973 to 1987
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1973 t …
Title Lake Chad Evaporation 1973 to 1987
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1963 t …
Title Lake Chad Evaporation 1963 to 1997
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1963 t …
Title Lake Chad Evaporation 1963 to 1997
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Lake Chad Evaporation 1963 t …
Title Lake Chad Evaporation 1963 to 1997
Abstract Located on the edge of the Sahara and bordering four countries--Chad, Cameroon, Nigeria, and Niger--the immense area of this land locked lake has nearly disappeared in recent years. Persistent drought has caused the lake to drop from its former sixth place position in the list of world's largest lakes, it is now one tenth its former size. The basin of the lake is not naturally deep, so the surface area of the lake tended to spread out, keeping the total depth to little more 23 feet (7 meters). In recent years, rainfall patterns have begun to change, and tributaries to Lake Chad have not been refilling the basin as rapidly as they used to. The lush, productive flora and fauna fed by the wetlands of the shallow lake have suffered as a result. This has led to significant changes for various communities of people that live in the vicinity of the Lake. While for some the now exposed lake bed has enabled new land to be cultivated, much of the available fresh water that might have been used for irrigation is no longer dependable. As rainfall rates appear to be declining year after year, people living nearby develop even greater dependence on the lake, draining it even faster.
Completed 2001-02-22
Dust Storm from the Bodele D …
Title Dust Storm from the Bodele Depression
Description On January 29, 2007, a characteristic dual-plume dust storm blew out of the Bodele Depression in northern Africa. The Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite took this picture the same day. This image shows two pale beige dust plumes blowing out of the Bodele Depression toward the southwest. The dust partially blurs the satellite's view of Lake Chad, which spans the borders of Niger, Nigeria, Cameroon, and Chad. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC.
Dust Storm in Central Africa
Title Dust Storm in Central Africa
Description On March 23, 2005, winds were whipping across the sands of the southern Sahara Desert in northern Africa, spreading thick clouds of dust. The thickest plumes of dust are visible in Sudan, Chad and Niger, but dust also reaches southward into Nigeria (south of Niger) and Cameroon (east of Nigeria). On the Atlantic coast, scores of fires (marked in red) are burning in Senegal. Dust storms are frequent hazards to farmers and herders in the semi-arid lands at the southern margin of the Sahara. The winds can reach speeds up to 100 kilometers per hour, reducing visibility to zero, stripping the paint off cars, and causing sands dunes to move like waves across a sandy sea. South of the desert proper is a semi-arid region known as the Sahel, which is continually under threat of desertification, though not necessarily because of direct threats from the Sahara. Direct exposure to the Sahara threatens some farming regions in the West with encroachment of sand dunes, but in many other places, including Niger and the other countries around Lake Chad, cultivated land is buffered from direct exposure to the dunes of the Sahara by a green belt of bushes and trees. Here, the threat of desertification comes from the way people use, and overuse, the landscape. Too-frequent use of fire as an agricultural tool, cutting of trees, and overgrazing exacerbate naturally occurring droughts in this semi-arid landscape. Without vegetation to anchor the soil in place, wind erosion scours away the top soil. The loss of vegetation may even change the micro-climate of these green belts or pockets of vegetation through a reduction of humidity and rainfall. Areas that were once tenuously covered with vegetation become pockets of desert. For more about the processes of land degradation that lead to desertification, read a report on desertification [ http://pubs.usgs.gov/gip/deserts/desertification/ ] from the U.S. Geological Survey. The high-resolution image provided above has a spatial resolution of 1 kilometer per pixel. The MODIS Rapid Response System provides this image at additional resolutions. NASA image courtesy the MODIS Rapid Response Team, NASA-Goddard Space Flight Center
Dust Storm over Lake Chad
Title Dust Storm over Lake Chad
Description Highly reflective dust was blowing from the northeast over Lake Chad (green splash at bottom of image) on April 9, 2003. Frequent dust storms are just one of the many factors slowly eating away at this prime source of freshwater for people, animals and plants in (counterclockwise from top left) Niger, Nigeria, Cameroon, and Chad. Increasing demand for irrigation is draining the lake, and blowing sand and desert dust are creating sand dunes that are encroaching on the vegetation along the perimeter of the lake (see high-resolution image). The high-resolution image provided above is 500 meters per pixel. The MODIS Rapid Response System provides this image at MODIS? maximum spatial resolution of 250 meters. Image courtesy Jeff Schmaltz, MODIS Rapid Response Team, NASA GSFC
Dust Storms from Africa's Bo …
Title Dust Storms from Africa's Bodele Depression
Description Once serving as part of the floor for a much larger Lake Chad, the area now known as the Bodele Depression, located at the southern edge of the Sahara Desert in north central Africa, is slowly being transformed into a desert landscape. In the mid-1960s, Lake Chad was about the size of Lake Erie. But persistent drought conditions coupled with increased demand for freshwater for irrigation have reduced Lake Chad to about 5 percent of its former size. As the waters receded, the silts and sediments resting on the lakebed were left to dry in the scorching African sun. The small grains of the silty sand are easily swept up by the strong wind gusts that occasionally blow over the region. Once heaved aloft, the Bodele dust can be carried for hundreds or even thousands of kilometers. The remnants of Lake Chad appear as the olive-green feature set amid the tan and light brown hues of the surrounding landscape where the countries of Chad, Niger, Nigeria, and Cameroon all share borders. The Bodele Depression was the source of some very impressive dust storms that have swept over West Africa [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=11939 ] and the Cape Verde Islands [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=11935 ] in recent days. This true-color image was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS), flying aboard NASA?s Terra satellite, on February 7, 2004. A similar image was acquired later that same day by the MODIS instrument aboard NASA?s Aqua satellite. The high-resolution image available here is 500 meters per pixel, but both scenes are available at up to 250 meters per pixel?the sensor?s maximum resolution. Image courtesy Jacques Descloitres, MODIS Land Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov/ ] at NASA GSFC
Dust Storms from Africa's Bo …
Title Dust Storms from Africa's Bodele Depression
Description Once serving as part of the floor for a much larger Lake Chad, the area now known as the Bodele Depression, located at the southern edge of the Sahara Desert in north central Africa, is slowly being transformed into a desert landscape. In the mid-1960s, Lake Chad was about the size of Lake Erie. But persistent drought conditions coupled with increased demand for freshwater for irrigation have reduced Lake Chad to about 5 percent of its former size. As the waters receded, the silts and sediments resting on the lakebed were left to dry in the scorching African sun. The small grains of the silty sand are easily swept up by the strong wind gusts that occasionally blow over the region. Once heaved aloft, the Bodele dust can be carried for hundreds or even thousands of kilometers. The remnants of Lake Chad appear as the olive-green feature set amid the tan and light brown hues of the surrounding landscape where the countries of Chad, Niger, Nigeria, and Cameroon all share borders. The Bodele Depression was the source of some very impressive dust storms that have swept over West Africa [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=11939 ] and the Cape Verde Islands [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=11935 ] in recent days. This true-color image was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS), flying aboard NASA?s Terra satellite, on February 7, 2004. A similar image was acquired later that same day by the MODIS instrument aboard NASA?s Aqua satellite. The high-resolution image available here is 500 meters per pixel, but both scenes are available at up to 250 meters per pixel?the sensor?s maximum resolution. Image courtesy Jacques Descloitres, MODIS Land Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov/ ] at NASA GSFC
Northern Africa Fire Season
Title Northern Africa Fire Season
Description The agricultural fire season was underway in northern Africa in late November 2006. Each year around this time, farmers and people who raise livestock set fires across the region to clear dead vegetation and return its nutrients to the soil, preparing farmland for the next season's crops and preparing grazing lands for new growth of pasture grasses. This photo-like image from the Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] on NASA's Aqua [ http://aqua.nasa.gov ] satellite on November 27 shows scores of active fires (marked in red) burning across several countries of north-central Africa: (clockwise from top left) Niger, Chad, Central African Republic, Cameroon, and Nigeria. Although these fires are not necessarily immediately hazardous, such large-scale burning can have a strong impact on weather, climate, human health, and natural resources. The image also illustrates the transition of vegetation from the Sahel—a semi-arid, sparse savanna landscape that extends roughly across the latitude belt of Lake Chad—to the much wetter, and more lush savannas and woodlands of the Guinea zone in the south. Only a faint tinge of green marks the Sahel in the top part of the image. Vegetation becomes a deeper green farther to the south where annual rainfall is much more abundant. The high-resolution image provided above has a spatial resolution of 500 meters per pixel. The MODIS Rapid Response System provides twice-daily images of northern Africa at additional resolutions [ http://rapidfire.sci.gsfc.nasa.gov/subsets/ ] via a clickable map. NASA image courtesy the MODIS Rapid Response Team, [ http://rapidfire.sci.gsfc.nasa.gov ] Goddard Space Flight Center
Saharan Dust Storm
Title Saharan Dust Storm
Description A dust storm swept across the Sahara Desert on May 10, 2006, moving dust across Niger, Nigeria, Cameroon, and Chad. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov/ ] flying onboard the Terra [ http://terra.nasa.gov/ ] satellite took this picture the same day. In this image, the dust appears as a pale beige plume that sweeps westward over the desert. White clouds dot the skies around the fringes of the storm. NASA image courtesy Jeff Schmaltz, MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC
Africa's Disappearing Lake C …
nasa, nasaimageofthedaygalle …
Lake Chad, once one of the A …
landsat_chad
mediatype IMAGE
mediatype image
date 2001
creator NASA -- Images courtesy NASA GSFC svs.gsfc.nasa.gov/ Scientific Visualization Studio and landsat.gsfc.nasa.gov/ Landsat 7 Project Science Office.
identifier landsat_chad
Dust Storms from Africa's Bo …
nasa, nasanaturalhazards
Once serving as part of the …
Bodele_TMO2004042
mediatype IMAGE
mediatype image
date 2004-02-11
creator NASA -- NASA Image Of The Day
identifier Bodele_TMO2004042
Dust Storm from the Bodele D …
nasa, nasanaturalhazards
On January 29, 2007, a chara …
bodele_amo_2007029
mediatype IMAGE
mediatype image
date 2007-01-29
creator NASA -- NASA Image Of The Day
identifier bodele_amo_2007029
Saharan Dust Storm: Natural …
nasa, nasanaturalhazards
A dust storm swept across th …
sahara_tmo_2006130
mediatype IMAGE
mediatype image
date 2006-05-10
creator NASA -- NASA Image Of The Day
identifier sahara_tmo_2006130
Dust Storms from Africa's Bo …
nasa, nasanaturalhazards
Once serving as part of the …
Bodele_TMO2004038
mediatype IMAGE
mediatype image
date 2004-02-07
creator NASA -- NASA Image Of The Day
identifier Bodele_TMO2004038
Lake Chad and the Sahel : Im …
nasa, nasaimageofthedaygalle …
Lake Chad, shown at the top- …
LakeChad.A2001294.0940
mediatype IMAGE
mediatype image
date 2001-10-21
creator NASA -- Image courtesy Jacques Descloitres, modis-land.gsfc.nasa.gov/ MODIS Land Rapid Response Team at NASA GSFC
identifier LakeChad.A2001294.0940
Dust Storm over Lake Chad: I …
nasa, nasaimageofthedaygalle …
Highly reflective dust was b …
Chad.AMOA2003099
mediatype IMAGE
mediatype image
date 2003-04-09
creator NASA -- The high-resolution image provided above is 500 meters per pixel. The MODIS Rapid Response System provides this image at MODIS? maximum spatial resolution of http://rapidfire.sci.gsfc.nasa.gov/gallery/?2003099-0409/Chad.A2003099.1240.250m.jpg 250 meters. Image courtesy Jeff Schmaltz, rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team, NASA GSFC
identifier Chad.AMOA2003099
Northern Africa Fire Season: …
nasa, nasanaturalhazards
The agricultural fire season …
NAfrica_chad_AMO_2006331
mediatype IMAGE
mediatype image
date 2006-11-27
creator NASA -- NASA Image Of The Day
identifier NAfrica_chad_AMO_2006331
Dust Storm and Fires in Cent …
nasa, nasaimageofthedaygalle …
A science teacher or college …
aqua_bodele_18nov04
mediatype IMAGE
mediatype image
date 2004-11-18
creator NASA -- NASA image created by Jesse Allen, Earth Observatory, using data obtained from the rapidfire.sci.gsfc.nasa.gov/ MODIS Rapid Response team.
identifier aqua_bodele_18nov04
Dust Storm in Central Africa …
nasa, nasanaturalhazards
On March 23, 2005, winds wer …
Sahara_dust.AMOA2005113
mediatype IMAGE
mediatype image
date 2005-04-23
creator NASA -- NASA Image Of The Day
identifier Sahara_dust.AMOA2005113
Africa in SRTM 3-D, Anaglyph …
PIA04964
Sol (our sun)
C-Band Interferometric Radar …
Title Africa in SRTM 3-D, Anaglyph of Shaded Relief
Original Caption Released with Image This stereoscopic shaded relief image shows Africa's topography as measured by the Shuttle Radar Topography Mission (SRTM) in February 2000. Also shown are Madagascar, the Arabian Peninsula, and other adjacent regions. Previously, much of the topography here was not mapped in detail. Digital elevation data, such as provided by SRTM, are in high demand by scientists studying earthquakes, volcanism, and erosion patterns and for use in mapping and modeling hazards to human habitation. But the shape of Earth's surface affects nearly every natural process and human endeavor that occurs there, so elevation data are used in a wide range of applications. The image shown here is greatly reduced from the original data resolution, but still provides a good overview of the continent's landforms. It is best viewed while panning at full resolution while using image display software. The northern part of the continent consists of a system of basins and plateaus, with several volcanic uplands whose uplift has been matched by subsidence in the large surrounding basins. Many of these basins have been infilled with sand and gravel, creating the vast Saharan lands. The Atlas Mountains in the northwest were created by convergence of the African and Eurasian tectonic plates. The geography of the central latitudes of Africa is dominated by the Great Rift Valley, extending from Lake Nyasa to the Red Sea, and splitting into two arms to enclose an interior plateau and the nearly circular Lake Victoria, visible in the right center of the image. To the west lies the Congo Basin, a vast, shallow depression that rises to form an almost circular rim of highlands. Most of the southern part of the continent rests on a concave plateau comprising the Kalahari Basin and a mountainous fringe, skirted by a coastal plain that widens out in Mozambique in the southeast. Specific noteworthy features one may wish to explore in this scene include (1) the Richat Structure in Mauritania, a "bull's eye" geologic structure, (2) the Velingara Ring in Senegal, a possible meteorite impact crater, (3) the delta of the Niger River in Nigeria, (4) the Cameroon Line of volcanoes, crossing Cameroon and extending offshore, (5) long linear mountain ridges crossing the southern end of Africa, (6) Mount Kilimanjaro and neighboring volcanoes in Kenya and Tanzania, (7) the Afar Triangle in Ethiopia, Djibouti, and vicinity, where Earth's crust is being pulled in three directions by tectonic forces, (8) the Dead Sea fault line, between Israel and Jordan, (9) ancient shorelines, inland from the coast of Libya, and (10) vast seas of sand dunes, particularly across the Sahara Desert and much of the Arabian Peninsula. This anaglyph was created by deriving a shaded relief image from the SRTM data, draping it back over the SRTM elevation model, and then generating two differing perspectives, one for each eye. Illumination is from the north (top). When viewed through special glasses, the anaglyph is a, vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter. Elevation data used in this image were acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the National Aeronautics and Space Administration (NASA), the National Geospatial-Intelligence Agency (NGA) of the U.S. Department of Defense (DoD), and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C. Orientation: North toward the top, Mercator projection Image Data: Shaded SRTM elevation model Date Acquired: February 2000
General Description STS-105 Shuttle Mission Imagery
Lake Chad, Chad, Africa
Title Lake Chad, Chad, Africa
Description Once a great inland lake, Lake Chad (13.0N, 14.0E) in the Sahara Desert at the intersection of the African nations of Chad, Niger, Nigeria and Cameroon, is now in decline. The larger northern lobe is almost totally dry and slowly filling in with encroaching sand dunes. The southern lobe, still retains some water in the lower center but the water surface area is less than 2000 square kilometers and sand dunes are filling in the north end.
Date Taken 1982-11-16
Lake Chad, Chad, Africa
Title Lake Chad, Chad, Africa
Description The fluctuating water levels of Lake Chad, (13.0N, 15.0E) at the intersection of the borders of Chad, Niger and Cameroon in the Sahara Desert, is an index of the drought in Africa. The lake level continues to decrease as indicated by the growing number and extent of emerging islands as previously submerged ancient sand dunes become visible. The water impounded between the dunes is probably because of local rainfall rather than a reversal of desertification.
Date Taken 1988-10-03
Lake Chad, Chad, Africa
Title Lake Chad, Chad, Africa
Description Africa's Lake Chad where the borders of Chad, Niger, Nigeria and Cameroon merge (13.0N, 14.0E) has been undergoing change for the past 25 to 30 years when it was first noticed that the lake is drying up. Since then, astronauts have been photographing it on a regular basis to record the diminishing lake bed. This lake was once the aproximate size of Lake Erie but is now only about half that size and is still receeding.
Date Taken 1990-04-29
Lake Chad, Chad, Africa
Title Lake Chad, Chad, Africa
Description An oblique view of Africa's Lake Chad where the borders of Chad, Niger, Nigeria and Cameroon merge (13.0N, 14.0E) has been undergoing change for the past 25 to 30 years when it was first noticed that the lake is drying up. Since then, astronauts have been photographing it on a regular basis to record the diminishing lake bed. This lake was once the aproximate size of Lake Erie but is now only about half that size and is still receeding.
Date Taken 1990-03-04
STS-5 Earth obervation of La …
Title STS-5 Earth obervation of Lake Chad in Africa
Description STS-5 Earth obervation of Lake Chad in Africa's Sahara Desert. Lake Chad is bordered by Chad (to the right in this view), Niger (upper left), Nigeria (lower left), and Cameroon (lower right). The irregularly-shaped dark patches show the lake's earlier level. Lighter markings within the dark region are sand dunes.
Date Taken 1982-11-17
Lake Chad, Chad as seen from …
Title Lake Chad, Chad as seen from STS-66
Description This oblique view of Lake Chad was taken by the STS-66 crew in November 1994. This lake lies mainly in the Republic of Chad and partly in Nigeria, Cameroon and Niger. The size of Lake Chad varies seasonally and is actually divided into north and south basins, neither of which is generally more than 25 feet (7.6 meters) deep. In this photograph, all the water appears to be located in the southern basin with the northern and eastern edges of both basins covered with sand dunes which have invaded the area where the water once stood. The prevailing wind direction can be seen from the agriculture burning in both basins to be from the east.
Date Taken 1994-11-14
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