FN Archimer Export Format
PT J
TI Paleohydrology reconstruction and Holocene climate variability in the South Adriatic Sea
BT 
AF SIANI, G.
   MAGNY, M.
   PATERNE, M.
   DEBRET, M.
   FONTUGNE, M.
AS 1:1;2:2;3:3;4:4,5;5:3;
FF 1:;2:;3:;4:;5:;
C1 Univ Paris 11, Dept Sci Terre, IDES UMR CNRS 8148, F-91405 Orsay, France.
   UFR Sci & Tech, CNRS, UMR 6249, Lab Chronoenvironm, F-25030 Besancon, France.
   CEA, Lab Mixte CNRS, LSCE, Domaine CNRS, F-91118 Gif Sur Yvette, France.
   Univ Caen Basse Normandie, UMR CNRS 6143, Lab Morphodynam Continentale & Cotiere M2C, F-14000 Caen, France.
   Univ Rouen, F-76821 Mont St Aignan, France.
C2 UNIV PARIS 11, FRANCE
   UNIV FRANCHE COMTE, FRANCE
   CEA, FRANCE
   UNIV CAEN, FRANCE
   UNIV ROUEN, FRANCE
IN DOAJ
IF 3.482
TC 47
TU Centre national de la recherche scientifique
   Commissariat à l'énergie atomique et aux énergies alternatives
   Institut national de la recherche agronomique
   Institut national de recherches archéologiques préventives
   Université Paris-Sud
   Université de Caen Normandie
   Université de Franche-Comté
   Université de Rouen
   Université de Versailles Saint-Quentin-en-Yvelines
UR https://archimer.ifremer.fr/doc/00181/29204/27583.pdf
LA English
DT Article
CR PROMETE 90 (1)
   PROMETE 90 (2)
   PROMETE 90 (3)
BO Marion Dufresne
AB Holocene paleohydrology reconstruction is derived combining planktonic and benthic stable oxygen and carbon isotopes, sea surface temperatures (SSTs) and oxygen isotope composition of seawater (delta O-18(w)) from a high sedimentation core collected in the South Adriatic Sea (SAS). Core chronology is based on 10 AMS C-14 measures on planktonic foraminifera and tephra layers. Results reveal two contrasted paleohydrological periods that reflect (i) a marked lowering of delta O-18(w)/salinity during the early to mid-Holocene (11.5 ka to 6.3 ka), including the two-step sapropel S1 deposition, followed during the mid-to upper Holocene by (ii) a prevailing period of increased salinity and enhanced arid conditions in the South Adriatic Basin. Superimposed on these trends, short-term centennial-scale hydrological events punctuated the Holocene period in the SAS. During the early to mid-Holocene, two main SST coolings together with prominent delta O-18(w)/salinity lowering delineate the sapropel S1 interruption and the post-sapropel phase between 7.3 to 6.3 ka. After 6 ka, centennial-scale delta O-18(w) and G. bulloides delta C-13 lowering, mostly centered between 3 to 0.6 ka, reflect short-term hydrological changes related to more intensive runoff of the Po and/or Apennine rivers. These short-term events, even of lesser amplitude compared to the early to mid-Holocene period, may have induced a lowering of sea surface density and consequently reduced and/or inhibited the formation of deep bottom waters in the SAS. Comparison of the emerging centennial-to millennial-scale hydro-logical record with previous climatic records from the central Mediterranean area and north of the Alps reveal possible synchronicities (within the radiocarbon-dating uncertainty) between phases of lower salinity in the SAS and periods of wetter climatic conditions around the north-central Adriatic Sea. Finally, wavelet analyses provide new clues about the potential origin of climate variability in the SAS, confirming the evidence for a mid-Holocene transition in the central Mediterranean climate and the dominance of a similar to 1670-yr periodicity after 6 ka, reflecting a plausible connection with the North Atlantic climate system.
PY 2013
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 9
IS 1
UT 000316961900032
BP 499
EP 515
DI 10.5194/cp-9-499-2013
ID 29204
ER

EF