FN Archimer Export Format
PT J
TI Centennial-scale SE Pacific sea surface temperature variability over the past 2300 years
BT 
AF Collins, James A.
   Lamy, Frank
   Kaiser, Jérôme
   Ruggieri, Nicoletta
   Henkel, Susann
   De Pol-Holz, Ricardo
   Garreaud, Réne
   Arz, Helge W.
AS 1:1;2:1;3:2;4:1;5:1;6:3,4;7:4,5;8:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research; Bremerhaven ,Germany
   IOW - Institute for Baltic Sea Research; Warnemünde ,Germany
   GAIA-Antártica, Universidad de Magallanes; Punta Arenas ,Chile
   Center for Climate and Resilience Research (CR); Chile
   Department of Geophysics; University of Chile, Chile
C2 INST A WEGENER, GERMANY
   LEIBNIZ INST BALT SEA RES (IOW), GERMANY
   UNIV MAGALLANES, CHILE
   CR2, CHILE
   UNIV CHILE, CHILE
IF 2.888
TC 6
UR https://archimer.ifremer.fr/doc/00482/59357/62125.pdf
LA English
DT Article
CR MD159 / PACHIDERME
BO Marion Dufresne
AB Detailed temperature reconstructions over the past 2000 years are important for contextualising modern climate change. The mid‐latitude SE Pacific is a key region in this regard in terms of understanding the climatic linkages between the tropics and southern high latitudes. Multi‐centennial timescale temperature variability remains, however, poorly understood, due to a lack of long, high‐temporal‐resolution temperature records from this region and from the southern high latitudes in general. We present a unique alkenone sea surface temperature (SST) record from 44°S on the southern Chilean margin in the SE Pacific spanning the last 2300 years at decadal resolution. The record displays relatively large changes including a cooling transition from 14°C to 12.5°C between 1100 and 600 cal yrs BP, in line with other Chile margin SST records and coeval with Antarctic cooling. This cooling is attributable to reduced Southern Ocean deep convection, driven by a late Holocene sea‐ice increase in the Weddell Sea associated with increased El‐Niño Southern Oscillation (ENSO) variability. Superimposed on the late Holocene cooling we observe multi‐centennial timescale SST variability, including relatively cool SSTs (12.5°C) from 950 to 500 cal yrs BP, corresponding to the Medieval Climate Anomaly, and warmer SSTs (13°C) from 500 to 200 cal yrs BP, corresponding to the Little Ice Age. These oscillations may reflect either multi‐centennial internal variability of the Southern Ocean deep convection and/or multi‐centennial variability in the phasing of ENSO and Southern Annular Mode (SAM) events. 
PY 2019
PD MAR
SO Paleoceanography And Paleoclimatology
SN 2572-4517
PU American Geophysical Union (AGU)
VL 34
IS 3
UT 000464655500005
BP 336
EP 352
DI 10.1029/2018PA003465
ID 59357
ER

EF