FN Archimer Export Format
PT J
TI A two-million-year-long hydroclimatic context for hominin evolution in southeastern Africa
BT 
AF CALEY, Thibaut
   EXTIER, Thomas
   COLLINS, James A.
   SCHEFUSS, Enno
   DUPONT, Lydie
   MALAIZE, Bruno
   ROSSIGNOL, Linda
   SOURON, Antoine
   MCCLYMONT, Erin L.
   JIMENEZ-ESPEJO, Francisco J.
   GARCIA-COMAS, Carmen
   EYNAUD, Frederique
   MARTINEZ, Philippe
   ROCHE, Didier M.
   JORRY, Stephan
   CHARLIER, Karine
   WARY, Melanie
   GOURVES, Pierre-Yves
   BILLY, Isabelle
   GIRAUDEAU, Jacques
AS 1:1;2:1,2;3:3,4;4:5;5:5;6:1;7:1;8:6;9:7;10:8;11:9,10;12:1;13:1;14:2,11;15:12;16:1;17:1;18:1;19:1;20:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:PDG-REM-GM-LGS;16:;17:;18:;19:;20:;
C1 Univ Bordeaux, CNRS, EPOC, UMR 5805, Pessac, France.
   Univ Paris Saclay, CEA CNRS UVSQ, IPSL, LSCE, Gif Sur Yvette, France.
   GFZ German Res Ctr Geosci, Organ Surface Geochem Lab, Sect Geomorphol 5 1, Potsdam, Germany.
   Alfred Wegener Inst Helmholtz Ctr Polar & Marine, Bremerhaven, Germany.
   Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany.
   Univ Bordeaux, CNRS, UMR 5199, PACEA, Pessac, France.
   Univ Durham, Dept Geog, Durham, England.
   JAMSTEC, Dept Biogeochem, Yokosuka, Kanagawa, Japan.
   JAMSTEC, Res & Dev Ctr Global Change, Yokohama, Kanagawa, Japan.
   Univ Vic Cent Univ Catalonia, Ecol Grp, Barcelona, Spain.
   Vrije Univ Amsterdam, Fac Sci Cluster Earth & Climate, Amsterdam, Netherlands.
   Inst Francais Rech Exploitat Mer IFREMER, Unite Geosci Marines, Plouzane, France.
C2 UNIV BORDEAUX, FRANCE
   UNIV PARIS SACLAY, FRANCE
   GFZ, GERMANY
   INST A WEGENER, GERMANY
   UNIV BREMEN MARUM, GERMANY
   UNIV BORDEAUX, FRANCE
   UNIV DURHAM, UK
   JAMSTEC, JAPAN
   JAMSTEC, JAPAN
   UNIV CENT CATALONIA (UVIC), SPAIN
   UNIV VRIJE AMSTERDAM, NETHERLANDS
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 43.07
TC 71
UR https://archimer.ifremer.fr/doc/00449/56059/57581.pdf
   https://archimer.ifremer.fr/doc/00449/56059/57582.xlsx
LA English
DT Article
CR MOZAPHARE-MD104
BO Marion Dufresne
AB The past two million years of eastern African climate variability is currently poorly constrained, despite interest in understanding its assumed role in early human evolution1,2,3,4. Rare palaeoclimate records from northeastern Africa suggest progressively drier conditions2,5 or a stable hydroclimate6. By contrast, records from Lake Malawi in tropical southeastern Africa reveal a trend of a progressively wetter climate over the past 1.3 million years7,8. The climatic forcings that controlled these past hydrological changes are also a matter of debate. Some studies suggest a dominant local insolation forcing on hydrological changes9,10,11, whereas others infer a potential influence of sea surface temperature changes in the Indian Ocean8,12,13. Here we show that the hydroclimate in southeastern Africa (20–25° S) is controlled by interplay between low-latitude insolation forcing (precession and eccentricity) and changes in ice volume at high latitudes. Our results are based on a multiple-proxy reconstruction of hydrological changes in the Limpopo River catchment, combined with a reconstruction of sea surface temperature in the southwestern Indian Ocean for the past 2.14 million years. We find a long-term aridification in the Limpopo catchment between around 1 and 0.6 million years ago, opposite to the hydroclimatic evolution suggested by records from Lake Malawi. Our results, together with evidence of wetting at Lake Malawi, imply that the rainbelt contracted toward the Equator in response to increased ice volume at high latitudes. By reducing the extent of woodland or wetlands in terrestrial ecosystems, the observed changes in the hydroclimate of southeastern Africa—both in terms of its long-term state and marked precessional variability—could have had a role in the evolution of early hominins, particularly in the extinction of Paranthropus robustus. 
PY 2018
PD AUG
SO Nature
SN 0028-0836
PU Nature Publishing Group
VL 560
IS 7716
UT 000440552600046
BP 76
EP 79
DI 10.1038/s41586-018-0309-6
ID 56059
ER

EF