@article{PAR00007385, title = {{A} combined high and low spatial resolution approach for mapping snow covered areas in the {A}tlas mountains}, author = {{C}haponniere, {A}. and {M}aisongrande, {P}. and {D}uchemin, {B}eno{\^i}t and {H}anich, {L}. and {B}oulet, {G}illes and {E}scadafal, {R}ichard and {E}louaddat, {S}.}, editor = {}, language = {{ENG}}, abstract = {{D}ynamics of snow in semi-arid mountains are poorly investigated despite the fact that snow may represent an important source of water for downstream populations especially in the spring and early summer. {D}ata acquired by space-borne optical sensors (i.e. reflectance and derived snow indices) may be suitable for spatial and temporal monitoring of snow cover. {H}owever, due to prevailing terrain and climatic conditions, the use of satellite sensor data to monitor snow dynamics is not trivial over such regions. {S}nowfall as well as precipitation are characterized by strong space?time variability. {I}ndeed snow can fall and melt within one week. {U}nder such conditions, appropriate monitoring of snow dynamics requires space instruments that provide data with high spatial and high temporal resolutions. {I}n this context we developed a new approach based on the combination of two types of instruments: low spatial and high temporal resolution ({S}yste`me {P}robatoire de l'{O}bservation de la {T}erre ({SPOT})- {VEGETATION}) and high spatial and low temporal resolution ({L}andsat {T}hematic {M}apper). {T}his new approach improves the relationship between snow index and snow area. {T}he method is validated against snow maps derived from classification of high spatial resolution data on the {A}tlas range, in {M}orocco. {I}t is then applied to a one-year series of {SPOT}-4 {VEGETATION} images allowing to derive a temporal snow cover profile at 1km spatial resolution over the entire {A}tlas. {T}he yearly snow profile obtained is of great interest for hydrological modelling.}, keywords = {{MAROC}}, booktitle = {}, journal = {{I}nternational {J}ournal of {R}emote {S}ensing}, volume = {26}, numero = {13}, pages = {2755--2777}, year = {2005}, DOI = {10.1080/01431160500117758}, URL = {https://www.documentation.ird.fr/hor/{PAR}00007385}, }