FN Archimer Export Format
PT J
TI Abrupt response of chemical weathering to Late Quaternary hydroclimate changes in northeast Africa
BT 
AF BASTIAN, Luc
   REVEL, Marie
   BAYON, Germain
   DUFOUR, Aurelie
   VIGIER, Nathalie
AS 1:1,2;2:1;3:3,4;4:2;5:2;
FF 1:;2:;3:PDG-REM-GM-LGS;4:;5:;
C1 Univ Cote Azur, CNRS, Observat La Cote Azur, IRD, 250 Rue Albert Einstein, F-06560 Valbonne, France.
   UPMC Univ Paris 06, LOV, CNR, 181 Chemin Lazaret, F-06230 Villefranche Sur Mer, France.
   IFREMER, Unit Res Geosci Marines, F-29280 Plouzane, France.
   Dept Earth Sci Royal Museum Cent Afr, Leuvensesteenweg, B-3080 Tervuren, Belgium.
C2 CNRS, FRANCE
   UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
   ROYAL MUSEUM CENT AFRICA, BELGIUM
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer jusqu'en 2018
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 4.122
TC 36
UR https://archimer.ifremer.fr/doc/00376/48697/49030.pdf
   https://archimer.ifremer.fr/doc/00376/48697/49031.pdf
LA English
DT Article
CR MIMES
BO Pelagia
AB Chemical weathering of silicate rocks on continents acts as a major sink for atmospheric carbon dioxide and has played an important role in the evolution of the Earth’s climate. However, the magnitude and the nature of the links between weathering and climate are still under debate. In particular, the timescale over which chemical weathering may respond to climate change is yet to be constrained at the continental scale. Here we reconstruct the relationships between rainfall and chemical weathering in northeast Africa for the last 32,000 years. Using lithium isotopes and other geochemical proxies in the clay-size fraction of a marine sediment core from the Eastern Mediterranean Sea, we show that chemical weathering in the Nile Basin fluctuated in parallel with the monsoon-related climatic evolution of northeast Africa. We also evidence strongly reduced mineral alteration during centennial-scale regional drought episodes. Our findings indicate that silicate weathering may respond as quickly as physical erosion to abrupt hydroclimate reorganization on continents. Consequently, we anticipate that the forthcoming hydrological disturbances predicted for northeast Africa may have a major impact on chemical weathering patterns and soil resources in this region.
PY 2017
PD MAR
SO Scientific Reports
SN 2045-2322
PU Nature Publishing Group
VL 7
IS 44231
UT 000396219100001
DI 10.1038/srep44231
ID 48697
ER

EF