FN Archimer Export Format
PT J
TI Western Mediterranean Sea Paleothermometry Over the Last Glacial Cycle Based on the Novel RI‐OH Index
BT 
AF Davtian, Nina
   Ménot, Guillemette
   Fagault, Yoann
   Bard, Edouard
AS 1:1;2:2;3:1;4:1;
FF 1:;2:;3:;4:;
C1 CEREGE, Aix Marseille Univ, CNRS, IRD, INRA, Collège de France Aix‐en‐Provence ,France
   Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL‐TPE Lyon ,France
C2 UNIV AIX MARSEILLE, FRANCE
   UNIV LYON, FRANCE
IF 2.888
TC 12
UR https://archimer.ifremer.fr/doc/00486/59812/62949.pdf
   https://archimer.ifremer.fr/doc/00486/59812/62950.pdf
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   IMAGES V LEG 5
BO Marion Dufresne
AB RI‐OH (Ring Index of hydroxylated tetraethers) has recently been proposed to reconstruct paleotemperatures in mid‐to‐low latitude marginal seas. However, RI‐OH has barely been tested in marginal seas under substantial terrigenous inputs. Here, we analyze tetraether lipids in two adjacent marine cores from the Gulf of Lions. We then test for the first time the RI‐OH paleothermometer from 160 to 9 ka BP in the western Mediterranean Sea. While terrigenous inputs prevent TEX86 from behaving as a paleothermometer, RI‐OH is generally consistent with other paleothermometric proxies. RI‐OH also responds systematically and coherently to glacial‐interglacial transitions as well as to abrupt climatic events. The average difference between RI‐OH‐temperatures and November–May UK′37‐temperatures is –2.0 °C with a standard error of 0.4 °C based on 249 RI‐OH‐UK′37 comparisons. This systematic difference suggests that hydroxylated tetraethers and alkenones record different temperatures, for instance winter and/or subsurface temperatures for RI‐OH. Another source of bias could be linked to the available RI‐OH‐temperature calibration, which clearly needs more work at the global and regional scales, notably for semienclosed basins such as the Mediterranean Sea. Nevertheless, our RI‐OH‐based interglacial – glacial anomalies are of 10 °C, a value within the high end of anomalies from previously published temperature records in the western Mediterranean Sea (from 3 to 13 °C). The RI‐OH‐based temperature anomalies also confirm the regional differences and seasonal contrasts in interglacial – glacial anomalies produced by models. Key Points RI‐OH consistently records glacial‐interglacial transitions and abrupt climatic events despite substantial terrigenous inputs RI‐OH could reflect winter and/or subsurface temperatures rather than annual sea surface temperatures in the Gulf of Lions RI‐OH‐based interglacial – glacial anomalies are high but plausible compared to reported anomalies in the western Mediterranean Sea 
PY 2019
PD APR
SO Paleoceanography And Paleoclimatology
SN 2572-4517
PU American Geophysical Union (AGU)
VL 34
IS 4
UT 000467950300012
BP 616
EP 634
DI 10.1029/2018PA003452
ID 59812
ER

EF