Drylands and desertification Land surface remote sensing : environment and risks /Escadafal, Richard DESERTIFICATION SECHERESSE DESERT COUVERT VEGETAL STRATE LIGNEUSE SURFACE DU SOL EAU DE SURFACE GESTION DE L'ENVIRONNEMENT TELEDETECTION SPATIALE DONNEES SATELLITE OBSERVATOIRE Regions with dry climates cover a large part of the world’s landmass (more than 40%). Collectively known by the English term "drylands", they encompass a wide range of ecosystems, including the American "deserts" of California, Nevada and Mexico ; the vast steppes of Central Asia and North Africa ; the Sahelian savannah and real deserts such as the Sahara in Africa or the Gobi in China. ISTE Elsevier Baghdadi, N. (ed.) Zribi, M. (ed.) 2016 text https://www.documentation.ird.fr/hor/fdi:010070541 fdi:010070541 Escadafal Richard, . Drylands and desertification. In : Baghdadi N. (ed.), Zribi M. (ed.), . Land surface remote sensing : environment and risks ISTE ; Elsevier, ). 2016, 1-25 EN ZONE ARIDE AFRIQUE DU NORD AMERIQUE DU NORD ASIE CENTRALE CHINE SAHARA