Articles | Volume 17, issue 2
Clim. Past, 17, 843–867, 2021
https://doi.org/10.5194/cp-17-843-2021
Clim. Past, 17, 843–867, 2021
https://doi.org/10.5194/cp-17-843-2021
Research article
 | Highlight paper
14 Apr 2021
Research article  | Highlight paper | 14 Apr 2021

Snapshots of mean ocean temperature over the last 700 000 years using noble gases in the EPICA Dome C ice core

Marcel Haeberli et al.

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Cited articles

Baggenstos, D., Häberli, M., Schmitt, J., Shackleton, S. A., Birner, B., Fischer, H., Severinghaus, J., and Kellerhals, T.: The Earth's radiative imbalance from the Last Glacial Maximum to the present, P. Natl. Acad. Sci. USA, 110, 14881–14886, https://doi.org/10.1073/pnas.1905447116, 2019. a, b, c, d, e
Bazin, L., Landais, A., Lemieux-Dudon, B., Toyé Mahamadou Kele, H., Veres, D., Parrenin, F., Martinerie, P., Ritz, C., Capron, E., Lipenkov, V., Loutre, M.-F., Raynaud, D., Vinther, B., Svensson, A., Rasmussen, S. O., Severi, M., Blunier, T., Leuenberger, M., Fischer, H., Masson-Delmotte, V., Chappellaz, J., and Wolff, E.: An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka, Clim. Past, 9, 1715–1731, https://doi.org/10.5194/cp-9-1715-2013, 2013. a
Bender, M., Sowers, T., and Lipenkov, V.: On the concentrations of O2, N2, and Ar in trapped gases from ice cores, J. Geophys. Res., 100, 18651, https://doi.org/10.1029/94JD02212, 1995. a
Bender, M. L.: Orbital tuning chronology for the Vostok climate record supported by trapped gas composition, Earth Planet. Sc. Lett., 204, 275–289, https://doi.org/10.1016/S0012-821X(02)00980-9, 2002. a
Bender, M. L., Barnett, B., Dreyfus, G., Jouzel, J., and Porcelli, D.: The contemporary degassing rate of 40Ar from the solid Earth, P. Natl. Acad. Sci. USA, 105, 8232–8237, https://doi.org/10.1073/pnas.0711679105, 2008. a, b, c
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Short summary
Using the temperature-dependent solubility of noble gases in ocean water, we reconstruct global mean ocean temperature (MOT) over the last 700 kyr using noble gas ratios in air enclosed in polar ice cores. Our record shows that glacial MOT was about 3 °C cooler compared to the Holocene. Interglacials before 450 kyr ago were characterized by about 1.5 °C lower MOT than the Holocene. In addition, some interglacials show transient maxima in ocean temperature related to changes in ocean circulation.