Wind-forged dune fields landscape in Erg Issaouane, eastern Algeria

Sentinel-2 MSI acquired on 30 May 2020 at 10:00:29 UTC
Sentinel-2 MSI acquired on 07 June 2020 at 10:10:31 UTC
Author(s): Sentinel Vision team, VisioTerra, France -
Keyword(s): Desert, sand sea, dunes, eolian erosion, Algeria, Sahara
Fig. 1 - S2 (30.05.2020) - Amid barchans (crescent) & star dunes, transition in sand colour from pinkish to reddish to blond in Erg Issaouane.
Fig. 2 - S2 (30.05.2020) - Dune corridors arrangement over the darker flat floor at S-E of Erg Issaouane. Some enclose sabkhahs, or salt flats.
Fig. 3 - S2 (30.05.2020) - At N-E of this sand sea, eolian forces made this arrangement of linear and transverse dunes, forming bigger dunes.
Fig. 4 - Mesoscale dunes move slowly over stationary megadunes while smaller dunes form & move faster over the backs of bigger types.