FN Archimer Export Format
PT J
TI Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic
BT 
AF BALMER, Sven
   SARNTHEIN, Michael
   MUDELSEE, Manfred
   GROOTES, Pieter M.
AS 1:1;2:1;3:2,3;4:4;
FF 1:;2:;3:;4:;
C1 Univ Kiel, Inst Geosci, Kiel, Germany.
   Climate Risk Anal, Bad Gandersheim, Germany.
   Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany.
   Univ Kiel, Inst Ecosyst Res, Kiel, Germany.
C2 UNIV KIEL, GERMANY
   CLIMATE RISK ANAL, GERMANY
   INST A WEGENER, GERMANY
   UNIV KIEL, GERMANY
IF 3.254
TC 18
UR https://archimer.ifremer.fr/doc/00421/53227/54789.pdf
   https://archimer.ifremer.fr/doc/00421/53227/54790.pdf
LA English
DT Article
CR MD 158 / LOGIPEV 2007
   MD 168 / AMOCINT (IMAGES XVII)
   VT 90 / SOUC
BO Marion Dufresne
DE ;C-14 reservoir ages;Atlantic paleoceangoraphy;surface water hydrography;glacial-to-deglacial variability;data-model comparison
AB Modeling studies predict that changes in radiocarbon (C-14) reservoir ages of surface waters during the last deglacial episode will reflect changes in both atmospheric C-14 concentration and ocean circulation including the Atlantic Meridional Overturning Circulation. Tests of these models require the availability of accurate C-14 reservoir ages in well-dated late Quaternary time series. We here test two models using plateau-tuned C-14 time series in multiple well-placed sediment core age-depth sequences throughout the lower latitudes of the Atlantic Ocean. C-14 age plateau tuning in glacial and deglacial sequences provides accurate calendar year ages that differ by as much as 500-2500years from those based on assumed global reservoir ages around 400years. This study demonstrates increases in local Atlantic surface reservoir ages of up to 1000years during the Last Glacial Maximum, ages that reflect stronger trades off Benguela and summer winds off southern Brazil. By contrast, surface water reservoir ages remained close to zero in the Cariaco Basin in the southern Caribbean due to lagoon-style isolation and persistently strong atmospheric CO2 exchange. Later, during the early deglacial (16ka) reservoir ages decreased to a minimum of 170-420 (14)Cyears throughout the South Atlantic, likely in response to the rapid rise in atmospheric pCO(2) and Antarctic temperatures occurring then. Changes in magnitude and geographic distribution of C-14 reservoir ages of peak glacial and deglacial surface waters deviate from the results of Franke et al. (2008) but are generally consistent with those of the more advanced ocean circulation model of Butzin et al. (2012). 
PY 2016
PD AUG
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 31
IS 8
UT 000383616500001
BP 1030
EP 1040
DI 10.1002/2016PA002953
ID 53227
ER

EF