FN Archimer Export Format
PT J
TI A model-data comparison of the Holocene global sea surface temperature evolution
BT 
AF LOHMANN, G.
   PFEIFFER, M.
   LAEPPLE, T.
   LEDUC, G.
   KIM, J-H.
AS 1:1;2:1;3:1;4:2;5:3;
FF 1:;2:;3:;4:;5:;
C1 Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, D-27570 Bremerhaven, Germany.
   Univ Kiel, Inst Earth Sci, D-24118 Kiel, Germany.
   Royal Netherlands Inst Sea Res, NL-1790 AB Den Burg, Netherlands.
C2 INST A WEGENER, GERMANY
   UNIV KIEL, GERMANY
   INST SEA RESEARCH (NIOZ), NETHERLANDS
IN DOAJ
IF 3.482
TC 84
UR https://archimer.ifremer.fr/doc/00496/60739/65189.pdf
   https://archimer.ifremer.fr/doc/00496/60739/65190.pdf
   https://archimer.ifremer.fr/doc/00496/60739/65191.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES 3-IPHIS-MD106
   IMAGES 4-MD111
   MD 122 / WEPAMA
   MD 123 / GEOSCIENCES 1
   MD 126 / MONA
   MD 127 / PAGE
   MD 131 / AUSCAN
   MD 134 / PICABIA
BO Marion Dufresne
AB We compare the ocean temperature evolution of the Holocene as simulated by climate models and reconstructed from marine temperature proxies. We use transient simulations from a coupled atmosphere-ocean general circulation model, as well as an ensemble of time slice simulations from the Paleoclimate Modelling Intercomparison Project. The general pattern of sea surface temperature (SST) in the models shows a high-latitude cooling and a low-latitude warming. The proxy dataset comprises a global compilation of marine alkenone- and Mg/Ca-derived SST estimates. Independently of the choice of the climate model, we observe significant mismatches between modelled and estimated SST amplitudes in the trends for the last 6000 yr. Alkenone-based SST records show a similar pattern as the simulated annual mean SSTs, but the simulated SST trends underestimate the alkenone-based SST trends by a factor of two to five. For Mg/Ca, no significant relationship between model simulations and proxy reconstructions can be detected. We test if such discrepancies can be caused by too simplistic interpretations of the proxy data. We explore whether consideration of different growing seasons and depth habitats of the planktonic organisms used for temperature reconstruction could lead to a better agreement of model results with proxy data on a regional scale. The extent to which temporal shifts in growing season or vertical shifts in depth habitat can reduce model-data misfits is determined. We find that invoking shifts in the living season and habitat depth can remove some of the model-data discrepancies in SST trends. Regardless whether such adjustments in the environmental parameters during the Holocene are realistic, they indicate that when modelled temperature trends are set up to allow drastic shifts in the ecological behaviour of planktonic organisms, they do not capture the full range of reconstructed SST trends. Results indicate that modelled and reconstructed temperature trends are to a large degree only qualitatively comparable, thus providing a challenge for the interpretation of proxy data as well as the model sensitivity to orbital forcing. 
PY 2013
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 9
IS 4
UT 000323412600029
BP 1807
EP 1839
DI 10.5194/cp-9-1807-2013
ID 60739
ER

EF