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Dust Storm in Chad
| Title |
Dust Storm in Chad |
| Description |
A dust storm blew through part of eastern Chad on June 11, 2006. The Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov/ ] flying onboard NASA's Terra [ http://terra.nasa.gov/ ] satellite captured this image of the storm as it blew toward Lake Chad. In this image, the dust appears as a wisp of pale beige set against a darker tan background. Lake Chad, near the border with Nigeria and Cameroon, is barely visible in this image, although it has been easily discernible in other [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=11952 ] satellite images. Although large, Lake Chad is shallow, and it is not the lowest point in Chad. Sitting at an even lower elevation is the Bodele Depression in eastern central Chad. The Bodele Depression, [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12581 ] part of a former lake bed or inland sea, is one of the world's most active sources of windblown dust, and it was likely the source of this storm. A study published in 2004 demonstrated that dust storms move more rapidly [ http://eobglossary.gsfc.nasa.gov/Newsroom/NewImages/images.php3?img_id=16534 ] across the depression than previously assumed. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. The MODIS Rapid Response Team provides daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?NAfrica_2_05/ ] of this region. |
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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 |
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Northern Africa Fire Season
| Title |
Northern Africa Fire Season |
| Description |
In northern Africa south of the Sahara Desert, the agricultural fire season was clearly underway when the Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] on NASA's Aqua [ http://aqua.nasa.gov ] satellite passed overhead on December 4, 2006, and captured this image. Places where MODIS detected actively burning fires are marked with red dots. Hundreds of fires are scattered across Nigeria, Cameroon, and the Central African Republic. People in Africa have been using fire to manage agricultural lands for hundreds, possibly thousands of years, and while the fires may not be immediately hazardous, such large-scale burning can have a strong impact on weather, climate, human health, and natural resources. The high-resolution image provided above has a spatial resolution of 500 meters per pixel. The MODIS Rapid Response System provides twice-daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/ ] of sub-sections of northern Africa via a clickable map in a variety of resolutions and formats. NASA image courtesy the MODIS Rapid Response Team, [ http://rapidfire.sci.gsfc.nasa.gov ] Goddard Space Flight Center |
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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 |
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Floods Across Africa's Sahel
| Title |
Floods Across Africa's Sahel |
| Description |
A tangle of rivers weaves across the uneven landscape of southwestern Chad, creating the wetlands that surround the Logone River. The backbone of the intersecting rivers in these images, the Logone flows northeast through Chad, forming part of the border with Cameroon, before joining the Chari River and emptying into Lake Chad. On September 26, 2006, when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured the top image, the wetlands around the Logone were dark with water. Western Chad, like many other countries in Africa's Sahel region, experienced widespread flooding because of unusually heavy rains in August and September. According to the Dartmouth Flood Observatory, [ http://www.dartmouth.edu/%7efloods/Archives/2006sum.htm ] floods in Chad and Nigeria displaced tens of thousands of people and caused extensive agricultural and infrastructure losses. In the top image, floods, not evident two weeks earlier, form dark pools along the Logone River. These images are displayed in false color to highlight the presence of water. Here, water is black or dark blue, clouds are pale blue and white, plant-covered land is green, and lightly vegetated land is tan. Natural-color and false-color [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?NAfrica_3_05/2006269 ] images of Chad are available from the MODIS Rapid Response Team twice daily. NASA images courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. |
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Floods Across Africa's Sahel
| Title |
Floods Across Africa's Sahel |
| Description |
A tangle of rivers weaves across the uneven landscape of southwestern Chad, creating the wetlands that surround the Logone River. The backbone of the intersecting rivers in these images, the Logone flows northeast through Chad, forming part of the border with Cameroon, before joining the Chari River and emptying into Lake Chad. On September 26, 2006, when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured the top image, the wetlands around the Logone were dark with water. Western Chad, like many other countries in Africa's Sahel region, experienced widespread flooding because of unusually heavy rains in August and September. According to the Dartmouth Flood Observatory, [ http://www.dartmouth.edu/%7efloods/Archives/2006sum.htm ] floods in Chad and Nigeria displaced tens of thousands of people and caused extensive agricultural and infrastructure losses. In the top image, floods, not evident two weeks earlier, form dark pools along the Logone River. These images are displayed in false color to highlight the presence of water. Here, water is black or dark blue, clouds are pale blue and white, plant-covered land is green, and lightly vegetated land is tan. Natural-color and false-color [ http://rapidfire.sci.gsfc.nasa.gov/subsets/?NAfrica_3_05/2006269 ] images of Chad are available from the MODIS Rapid Response Team twice daily. NASA images courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC. |
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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 |
|
Northern Africa Fire Season:
…
nasa, nasanaturalhazards
In northern Africa south of
…
NAfrica_chad_AMO_2006338
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2006-12-04 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
NAfrica_chad_AMO_2006338 |
|
Floods Across Africa's Sahel
…
nasa, nasanaturalhazards
* eoimages.gsfc.nasa.gov/ima
…
Chad_TMO_2006269
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2006-09-26 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
Chad_TMO_2006269 |
|
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 in Chad: Natural
…
nasa, nasanaturalhazards
A dust storm blew through pa
…
chad_tmo_2006162
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2006-06-11 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
chad_tmo_2006162 |
|
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