%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Jouve, G.
%A Vidal, L.
%A Adallal, R.
%A Rhoujjati, A.
%A Benkaddour, A.
%A Chapron, E.
%A Tachikawa, K.
%A Bard, E.
%A Courp, T.
%A Dezileau, L.
%A Hebert, B.
%A Rapuc, W.
%A Simonneau, A.
%A Sonzogni, C.
%A Sylvestre, Florence
%T Recent hydrological variability of the Moroccan Middle Atlas Mountains inferred from microscale sedimentological and geochemical analyses of lake sediments
%D 2019
%L fdi:010077083
%G ENG
%J Quaternary Research
%@ 0033-5894
%K North Africa hydrology ; Moroccan Middle Atlas ; Lake sediments ; Microfacies ; XRF ; Runoff ; Lake level
%K MAROC
%K MOYEN ATLAS ; ZONE MEDITERRANEENE
%M ISI:000488837500027
%N 1
%P 414-430
%R 10.1017/qua.2018.94
%U https://www.documentation.ird.fr/hor/fdi:010077083
%> https://www.documentation.ird.fr/intranet/publi/2019/10/010077083.pdf
%V 91
%W Horizon (IRD)
%X Study of the hydro-sedimentary dynamics of lakes provides key information on hydrological changes. In this work, we investigate Lake Azigza in the Moroccan Middle Atlas, a region that suffers from a scarcity of observational hydrological data necessary for a coherent management of water resources. Sedimentary deposits of Lake Azigza (32 degrees 58 ' N, 5 degrees 26 ' W, 1,550 m above sea level) were dated and analyzed by combining geochemical and mineralogical measurements coupled with microfacies characterization for the last 134 yr. The detrital component derived from X-ray fluorescence elemental composition and microstructures analysis of the lake sediments provided proxies of runoff activity and lake-level changes, respectively. These proxies were calibrated with regional hydro-climatic and instrumental measurements available over the last 50 yr and used to reconstruct past hydrological changes on inter-annual to decadal time scales between 1879 and 2013. Since 1879, lake level and runoff proxies responded in phase to regional inter-annual precipitation variations. We also show that after the major lake-level drop observed in 2008, the response of the runoff proxy to variable precipitation regime is enhanced. Such an approach emphasizes the potential of these hydro-climate-sensitive sedimentary archives to assess the impact of climate change in the Mediterranean region.
%$ 062 ; 032