FN Archimer Export Format
PT J
TI Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions
BT 
AF TELFORD, R. J.
   LI, C.
   KUCERA, M.
AS 1:1,2;2:2,3;3:4,5;
FF 1:;2:;3:;
C1 Univ Bergen, Dept Biol, N-5006 Bergen, Norway.
   Bjerknes Ctr Climate Res, N-5007 Bergen, Norway.
   Univ Bergen, Inst Geophys, N-5008 Bergen, Norway.
   Univ Bremen, MARUM, D-28359 Bremen, Germany.
   Univ Bremen, Fachbereich Geowissensch, D-28359 Bremen, Germany.
C2 UNIV BERGEN, NORWAY
   BCCR, NORWAY
   UNIV BERGEN, NORWAY
   UNIV BREMEN, GERMANY
   UNIV BREMEN, GERMANY
IN DOAJ
IF 3.482
TC 47
UR https://archimer.ifremer.fr/doc/00181/29202/27585.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
AB We demonstrate that the temperature signal in the planktonic foraminifera assemblage data from the North Atlantic typically does not originate from near-surface waters and argue that this has the potential to bias sea surface temperature reconstructions using transfer functions calibrated against near-surface temperatures if the thermal structure of the upper few hundred metres of ocean changes over time. CMIP5 climate models indicate that ocean thermal structure in the North Atlantic changed between the Last Glacial Maximum (LGM) and the pre-industrial (PI), with some regions, mainly in the tropics, of the LGM ocean lacking good thermal analogues in the PI. Transfer functions calibrated against different depths reconstruct a marked subsurface cooling in parts of the tropical North Atlantic during the last glacial, in contrast to previous studies that reconstruct only a modest cooling. These possible biases in temperature reconstructions may affect estimates of climate sensitivity based on the difference between LGM and pre-industrial climate. Quantifying these biases has the potential to alter our understanding of LGM climate and improve estimates of climate sensitivity.
PY 2013
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 9
IS 2
UT 000317009700022
BP 859
EP 870
DI 10.5194/cp-9-859-2013
ID 29202
ER

EF