FN Archimer Export Format
PT J
TI Sedimentological and palynological records since 10 ka BP along a proximal-distal gradient on the Armorican shelf (NW France)
BT 
AF David, Ophelie
   Penaud, Aurélie
   Vidal, Muriel
   Fersi, Wiem
   Lambert, Clément
   Goubert, Evelyne
   Herlédan, Maiwenn
   Stéphan, Pierre
   Pailler, Yvan
   Bourillet, Jean-François
   Baltzer, Agnes
AS 1:1,2;2:1;3:1;4:1;5:2;6:2;7:3;8:4;9:5;10:6;11:7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:PDG-REM;11:;
C1 Geo-Ocean, Univ. Brest, CNRS, Ifremer, UMR 6538, F-29280 Plouzané, France
   Geo-Ocean, Univ. Bretagne Sud, Univ. Brest, CNRS, Ifremer, UMR 6538, F-56000 Vannes, France
   Univ. Lille, Laboratoire D’Océanologie et de Géosciences, UMR 8187, F-59655 Villeneuve d’Ascq, France
   CNRS, Littoral Environnement Télédétection Géomatique, UMR 6554, IUEM, F-29280 Plouzané, France
   Chaire Armerie, Univ. Brest, Inrap, Littoral Environnnement Télédétection Géomatique, UMR 6554, IUEM, F-29280 Plouzané, France
   Ifremer, Ressources Physiques et écosystèmes de Fond de Mer, Centre de Bretagne. 1625, Route de Ste Anne, CS 10070, F-29280 Plouzané, France
   Univ. Nantes, Laboratoire Géolittomer/IGARUN, UMR 6554, F-44300 Nantes, France
C2 UBO, FRANCE
   UBS, FRANCE
   UNIV LILLE, FRANCE
   CNRS, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   UNIV NANTES, FRANCE
SI BREST
SE PDG-REM
UM GEO-OCEAN
IN WOS Ifremer UPR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 4
TC 1
UR https://archimer.ifremer.fr/doc/00792/90413/96146.pdf
LA English
DT Article
CR CABTEX
   IMAGES 1-MD101
   MD 169 / MICROSYSTEMS
   PROTEUS_DUNES
   PROTEUS_DUNES_2013
   PROTEUS_DUNES_LEG1
   PROTEUS_DUNES_LEG2
   PROTEUS_DUNES_LEG3
   VIBARMOR
   VT 98 / BISCOT
BO Pourquoi pas ?
   Marion Dufresne
   Beautemps-Beaupré
   Côtes De La Manche
DE ;Holocene;South Brittany;Pollen;Dinoflagellate cysts;Paleoenvironmental changes;Turritella layer;Anthropogenic pollen indicators (API);Fluvial discharge
AB New findings acquired in Armorican shelf (core MD08-3204 CQ: Bay of Quiberon and core VK03-58bis: South Glénan islands) depict Holocene paleoenvironmental changes since 10 ka BP through a multi-proxy dataset including sedimentological and palynological data. First, grain-size analyses and AMS-14C dates show a common sedimentary history for both study cores. The slowdown of the relative sea level (RSL) rise was accompanied by a drop of the sedimentation rates between ∼8.3 and 5.7 ka BP; the rates had been relatively higher at the onset of the Holocene. This interval led to the establishment of a shell-condensed level, identified in core VK03-58bis by the “Turritella layer” and interpreted as a marker for the Maximum Flooding Surface. Palynological data (pollen and dinoflagellate cyst assemblages) acquired in core MD08-3204 CQ argue for an amplification of the fluvial influence since 5.7 ka BP; the establishment of the Highstand System Tract (i.e., mixed marine and fluviatile influences on the platform) then accompanied the slowdown of the RSL rise rates. On the shelf, the amplification of Anthropogenic Pollen Indicators (API) has been better detected since 4.2 ka BP, due not only to the increase of human impact but also due to a stronger fluvial influence on the shelf during the Late Holocene. Palynological data, recorded on the 8.5–8.3 ka BP interval along an inshore-offshore gradient, also demonstrate the complexity of the palynological signals such as i) the fluvial influence that promotes some pollen taxa (Alnus and Corylus) from proximal areas and ii) the macro-regionalization of palynomorph sources in distal cores. In addition, the comparison of palynological tracers, including API, over the last 7 kyrs BP, with South Brittany coastal and mid-shelf sites subject to northern vs. southern Loire catchment areas, shows a major hydro-climatic effect on the reconstructed palynological signals. Strengthened subpolar gyre (SPG) dynamics, combined with recurrent positive North Atlantic Oscillation (NAO) configurations, appear responsible for increased winter precipitation and fluvial discharge over northern Europe, as in Brittany. Conversely, weakened SPG intervals, associated with recurrent negative NAO-like modes, are characterized by intensified winter fluvial discharge over southern Europe. Interestingly, at an infra-orbital timescale, we record major peaks of API during periods of strengthened (/weakened) SPG dynamics in sites subject to detritic-organic matter inputs from Brittany (/Loire) watersheds. 
PY 2022
PD OCT
SO Quaternary Science Reviews
SN 0277-3791
PU Elsevier BV
VL 293
UT 000860292000006
DI 10.1016/j.quascirev.2022.107678
ID 90413
ER

EF