FN Archimer Export Format
PT J
TI High-resolution sea surface reconstructions off Cape Hatteras over the last 10 ka
BT 
AF CLEROUX, Caroline
   DEBRET, Maxime
   CORTIJO, Elsa
   DUPLESSY, Jean-Claude
   DEWILDE, Fabien
   REIJMER, John
   MASSEI, Nicolas
AS 1:1;2:2;3:1;4:1;5:1;6:3;7:2;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 CEA CNRS UVSQ IPSL, Lab Sci Climat & Environm, F-91198 Gif Sur Yvette, France.
   Univ Rouen, Lab Morphodynam Continentale & Cotiere, Dept Geol, UMR CNRS INSU 6143, F-76821 Mont St Aignan, France.
   Vrije Univ Amsterdam, Dept Sedimentol & Marine Geol, FALW, NL-1081 HV Amsterdam, Netherlands.
C2 LSCE, FRANCE
   UNIV ROUEN, FRANCE
   UNIV VRIJE AMSTERDAM, NETHERLANDS
IF 3.3
TC 21
UR https://archimer.ifremer.fr/doc/00266/37681/36613.pdf
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
AB This study presents high-resolution foraminiferal-based sea surface temperature, sea surface salinity and upper water column stratification reconstructions off Cape Hatteras, a region sensitive to atmospheric and thermohaline circulation changes associated with the Gulf Stream. We focus on the last 10,000 years (10 ka) to study the surface hydrology changes under our current climate conditions and discuss the centennial to millennial time scale variability. We observed opposite evolutions between the conditions off Cape Hatteras and those south of Iceland, known today for the North Atlantic Oscillation pattern. We interpret the temperature and salinity changes in both regions as co-variation of activities of the subtropical and subpolar gyres. Around 8.3 ka and 5.2-3.5 ka, positive salinity anomalies are reconstructed off Cape Hatteras. We demonstrate, for the 5.2-3.5 ka period, that the salinity increase was caused by the cessation of the low salinity surface flow coming from the north. A northward displacement of the Gulf Stream, blocking the southbound low-salinity flow, concomitant to a reduced Meridional Overturning Circulation is the most likely scenario. Finally, wavelet transform analysis revealed a 1000-year period pacing the delta O-18 signal over the early Holocene. This 1000-year frequency band is significantly coherent with the 1000-year frequency band of Total Solar Irradiance (TSI) between 9.5 ka and 7 ka and both signals are in phase over the rest of the studied period.
PY 2012
PD FEB
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 27
IS PA1205
UT 000300330300002
BP 1
EP 14
DI 10.1029/2011PA002184
ID 37681
ER

EF