FN Archimer Export Format
PT J
TI Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles
BT 
AF UEMURA, R.
   MASSON-DELMOTTE, V.
   JOUZEL, J.
   LANDAIS, A.
   MOTOYAMA, H.
   STENNI, B.
AS 1:1;2:1;3:1;4:1;5:2;6:3;
FF 1:;2:;3:;4:;5:;6:;
C1 CEA CNRS UVSQ, IPSL Lab Sci Climat & Environm LSCE IPSL, UMR8212, F-91191 Gif Sur Yvette, France.
   Natl Inst Polar Res, Res Org Informat & Syst, Tachikawa, Tokyo 1908518, Japan.
   Univ Trieste, Dept Math & Geosci, I-34128 Trieste, Italy.
C2 IPSL, FRANCE
   NATL INST POLAR RES, JAPAN
   UNIV TRIESTE, ITALY
IN DOAJ
IF 3.56
TC 76
TU Centre national de la recherche scientifique
   Commissariat à l'énergie atomique et aux énergies alternatives
   Université de Versailles Saint-Quentin-en-Yvelines
UR https://archimer.ifremer.fr/doc/00139/25062/23172.pdf
   https://archimer.ifremer.fr/doc/00139/25062/65520.pdf
LA English
DT Article
CR APSARA 4 - MD 56
   IMAGES 3-IPHIS-MD106
   MD 158 / LOG IPEV 2007
   VT 90 / SOUC
BO Marion Dufresne
AB A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (delta T-source) and at the precipitation site (delta T-site) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve delta T-source and delta T-site information, different linear regression equations were proposed using theoretical isotope distillation models. A major source of uncertainty lies in the coefficient of regression, beta(site) which is related to the sensitivity of d to delta T-site. We show that different ranges of temperature and selections of isotopic model outputs may increase the value of beta(site) by more than a factor of two. To explore the impacts of this coefficient on reconstructed temperatures, we apply for the first time the exact same methodology to the isotope records from the three Antarctica ice cores. We show that uncertainties in the beta(site) coefficient strongly affect (i) the glacial-interglacial magnitude of delta T-source; (ii) the imprint of obliquity in delta T-source and in the site-source temperature gradient. By contrast, we highlight the robustness of delta T-site reconstruction using water isotopes records.
PY 2012
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 8
IS 3
UT 000305830200019
BP 1109
EP 1125
DI 10.5194/cp-8-1109-2012
ID 25062
ER

EF