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types suggests that wind regimes have changed through time. The active nature of this portion of the Erg is well illustrated by this image—smaller dunes form and migrate along the flanks of the larger dunes and sand ridges. Occasional precipitation fills basins formed by the dunes; as the water evaporates, salt deposits are left behind which appear as bluish-white areas.
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The most common landforms in the image are star dunes and barchan (or crescent) dunes. Small linear dunes appear at top left. Star dunes are formed when sand is transported from variable wind directions, whereas barchan dunes form in a single dominant wind regime. The superimposition of two dune
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The
Issaouane Erg (sand sea) is located in eastern Algeria between the Tinrhert Plateau to the north and the Fadnoun Plateau to the south. Ergs are vast areas of moving sand with little to no vegetation cover. Considered to be part of the Sahara Desert, the Issaouane Erg covers an area of
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791:==Summary== {{Information | Description=Astronaut photo of the Issaouane Erg (Sahara Desert), Algeria. | Source=http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16813 | Date=January 16, 2005 | Author=ISS Crew Earth Observations exper
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ISS Crew Earth
Observations experiment and the Image Science & Analysis Group, Johnson Space Center.
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Johnson Space Center. NASA copyright policy states that "NASA material is not protected by copyright
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in the United States because it was created by the Image
Science & Analysis Laboratory, of the
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approximately 38,000 km2. These complex dunes form the active southwestern border of the sand sea.
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http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16813
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Click on a date/time to view the file as it appeared at that time.
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Astronaut photo of the
Issaouane Erg (Sahara Desert), Algeria.
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Scienze della Terra per le superiori/Il modellamento eolico
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Add a one-line explanation of what this file represents
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Commons is a freely licensed media file repository.
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821:The following other wikis use this file:
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135:IssaouaneErg Algeria ISS010-E-13539.jpg
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283:3060 x 2036 pixel CCD, RGBG array.
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372:188 nautical miles (348 km)
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351:Nadir to Photo Center Direction
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224:ISSAOUANE SAND SEA, STAR DUNES
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614:Items portrayed in this file
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294:Percentage of Cloud Cover
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1089:Участник:Alogrin/Сахара
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395:Original image caption
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100:. Information from its
343:Nadir Point Longitude
240:Center Point Longitude
103:description page there
46:Size of this preview:
1019:Ерг (земјиштен облик)
335:Nadir Point Latitude
230:Center Point Latitude
884:Isaouane-n-Irarraren
497:This file is in the
369:Spacecraft Altitude
264:Camera Focal Length
453:NASA, public domain
378:Sun Elevation Angle
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52:Other resolutions:
769:17:58, 18 May 2006
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989:ერგი (გეოგრაფია)
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737:File history
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509:unless noted
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267:800 mm
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111:You can help
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22:File history
904:Erg (Wüste)
894:Erg (ørken)
834:عرق إيساوان
786:Holly Cheng
360:Sun Azimuth
255:Camera Tilt
133:Description
1195:_error
1064:Erg (dune)
797:File usage
754:Dimensions
685:image/jpeg
670:media type
561:македонски
442:Permission
354:Southwest
319:2005-01-16
77:image/jpeg
27:File usage
914:Sablomaro
751:Thumbnail
748:Date/Time
636:inception
573:sicilianu
569:português
533:العربيَّة
461:Licensing
330:14:25:12
221:Features
142:English:
1182:Metadata
1174:Q6088083
780:(491 KB)
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346:19.4° E
338:36.7° N
288:Quality
234:26.8° N
216:ALGERIA
186:ISS010 (
183:Mission
37:Metadata
969:Algeria
765:current
760:Comment
619:depicts
599:English
545:español
541:English
537:Deutsch
272:Camera
249:Camera
244:7.3° E
125:Summary
73:
1164:Sa mạc
1074:Сахара
864:Сахара
854:Сахара
844:Сахара
565:മലയാളം
434:Author
424:Source
303:Nadir
298:0-10%
208:13539
205:Frame
924:Dyyni
557:kurdî
478:false
475:false
390:3185
364:230°
315:Date
280:Film
964:Duna
954:अर्ग
757:User
511:". (
505:NASA
414:Date
382:14°
326:Time
196:Roll
17:File
1154:Erg
1129:erg
1054:ерг
1049:erg
944:erg
874:Erg
578:+/−
515:or
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
