Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/77583
Title: Nebkha or not? -Climate control on foredune mode
Authors: Hesp, Patrick A.
Hernández Calvento, Luis Francisco 
Gallego-Fernández, Juan B.
Miot da Silva, Graziela
Hernández Cordero, Antonio Ignacio 
Ruz, Marie Helene
García Romero, Leví Aday 
UNESCO Clasification: 250618 Sedimentología
251111 Génesis y morfología de suelos
Keywords: African Coast
Climate
Coastal Dunes
Foredune Mode
Nebkha
Rainfall
Issue Date: 2021
Journal: Journal of Arid Environments 
Abstract: This study examines the mode of foredune development along ~3,500 km of the west African and the Canary Islands coasts. Foredune modes are classified into either continuous and discontinuous ridges or nebkha (discrete dune mounds). The drivers determining foredune mode including temperature, winds, and sediment supply are investigated and rainfall is the principal driver. Continuous foredunes are found in the region where rainfall is above ~480–500 mm mean annual rainfall. Between around 340 mm and 480 mm the rainfall is not sufficient to sustain laterally continuous pioneer plant communities and discontinuous foredunes predominate. Below ~300 mm rainfall, xerophilous and halophilous shrub plants predominate and only nebkha occur. Our findings support the contention that climate, and particularly rainfall, plays a very significant role in driving foredune mode, and hence coastal morphological evolution.
URI: http://hdl.handle.net/10553/77583
ISSN: 0140-1963
DOI: 10.1016/j.jaridenv.2021.104444
Source: Journal of Arid Environments [ISSN 0140-1963], v. 187, (Abril 2021)
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