FN Archimer Export Format
PT J
TI Land-sea linkages on the Algerian Margin over the last 14 kyrs BP: Climate variability at orbital to centennial timescales
BT 
AF COUSSIN, V
   PENAUD, A.
   COMBOURIEU-NEBOUT, N.
   PEYRON, O.
   SICRE, M. A.
   TISNERAT-LABORDE, N.
   CATTANEO, Antonio
   BABONNEAU, Nathalie
AS 1:6;2:6;3:2;4:3;5:4;6:5;7:1;8:6;
FF 1:;2:;3:;4:;5:;6:;7:PDG-REM-GEOOCEAN-ALMA;8:;
C1 Univ. Brest, CNRS, Ifremer, Geo-Ocean, UMR 6538, F-29280 Plouzané, France
   HPNP, CNRS, UMR 7194, Département de Préhistoire du Muséum d'Histoire Naturelle, F-75013 Paris, France
   LOCEAN, CNRS, Sorbonne Université, Campus Pierre et Marie Curie, F75005 Paris, France
   Sorbonne Univ, LOCEAN, CNRS, Campus Pierre & Marie Curie, F-75005 Paris, France.
   Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, UMR 8212 UVSQ-CNRS-CEA, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
   Univ. Brest, CNRS, Ifremer, Geo-Ocean, UMR 6538, F-29280 Plouzané, France
C2 IFREMER, FRANCE
   MNHN, FRANCE
   UNIV MONTPELLIER, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV VERSAILLES ST QUENTIN EN YVELINES, FRANCE
   UBO, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ALMA
UM GEO-OCEAN
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 3
TC 2
UR https://archimer.ifremer.fr/doc/00852/96387/106244.pdf
LA English
DT Article
DE ;Holocene;Dinocysts;Pollen;Biomarkers;oy analysis;Algerian Current
AB Past and present environmental conditions over the Holocene along the Algerian coast involve complex atmosphere-hydrosphere-biosphere interactions and anthropogenic activities on adjacent watersheds. Atlantic Ocean surface waters entering the western Mediterranean Sea at the Gibraltar Strait create the Algerian Current, which flows along the North African coast in a succession of strong and large-scale eddies. Deep-water upwelling plumes are other recurrent hydrological features of the Algerian margin affecting regional environmental features. However, vegetation and paleohydrological changes that have occurred over the Holocene have not yet been described. To bridge this gap, a suite of paleoclimate proxies was analysed in marine core MD04-2801 (2067 m water depth) at a secular-scale resolution over the last 14 kyrs BP. Terrestrial (pollen grains) and marine (dinoflagellate cysts or dinocysts) palynological assemblages, as well as sedimentological (grain-size analysis and XRD-based quantitative analysis of clay minerals) and biomarkers (alkenones and n-alkanes), were determined to explore the links between past sea surface hydrological conditions and regional environmental changes on nearby watersheds.The over-representation of heterotrophic dinocyst taxa (Brigantedinium spp.) indicates strong planktonic productivity in the study area. Results shows that the links between dryness on land and surface hydrological conditions are expressed by: (i) recurrent upwelling cells during the relatively dry climate conditions of the Younger Dryas (12.7 to 11.7 ka BP), the Early Holocene (11.7 to 8.2 ka BP) and from 6 ka BP onwards, (ii) enhanced fluvial discharges between 8.2 and 6 ka BP during the African Humid Period concomitant with the colonization of coastal lands by Mediterranean forest. Middle to Late Holocene transition around 4.2 ka BP characterizes by the intense event reffered to here as the Algerian Mega Drought (4.3 to 3.9 ka BP). 
PY 2023
PD JUN
SO Palaeogeography Palaeoclimatology Palaeoecology
SN 0031-0182
PU Elsevier
VL 621
UT 001055172600001
DI 10.1016/j.palaeo.2023.111562
ID 96387
ER

EF