Chemical measurements from the EPICA Dome C core ...

• Main Authors: Wolff, Eric William, Fischer, Hubertus, Ruth, Urs, Twarloh, Birthe, Littot, Geneviève C, Mulvaney, Robert, Röthlisberger, Regine, de Angelis, Martine, Boutron, Claude F, Hansson, Margareta E, Jonsell, Ulf, Hutterli, Manuel A, Lambert, Fabrice, Kaufmann, Patrik R, Stauffer, Bernhard, Stocker, Thomas F, Steffensen, Jørgen Peder, Bigler, Matthias, Siggaard-Andersen, Marie-Louise, Udisti, Roberto, Becagli, Silvia, Castellano, Emiliano, Severi, Mirko, Wagenbach, Dietmar, Barbante, Carlo, Gabrielli, Paolo, Gaspari, Vania
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2006
• Subjects: Ice drill; Dome C; European Project for Ice Coring in Antarctica EPICA; Antarctic; Indian; Martine; Patagonia; Severi; Silvia; Southern Ocean; Antarc*; Antarctica; EPICA; ice core; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.728218; https://doi.pangaea.de/10.1594/PANGAEA.728218

Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740,000 years) from the Dome C Antarctic ice core. These data constrain winter sea-ice extent in the Indian Ocean, Southern Ocean biogenic productivity and Patagonian climatic conditions. We found that maximum sea-ice extent is closely tied to Antarctic temperature on multi-millennial timescales, but less so on shorter timescales. Biological dimethylsulphide emissions south of the polar front seem to have changed little with climate, suggesting that sulphur compounds were not active in climate regulation. We observe large glacial-interglacial contrasts in iron deposition, which we infer reflects strongly changing Patagonian conditions. During glacial terminations, changes in Patagonia apparently ... : Supplement to: Wolff, Eric William; Fischer, Hubertus; Ruth, Urs; Twarloh, Birthe; Littot, Geneviève C; Mulvaney, Robert; Röthlisberger, Regine; de Angelis, Martine; Boutron, Claude F; Hansson, Margareta E; Jonsell, Ulf; Hutterli, Manuel A; Lambert, Fabrice; Kaufmann, Patrik R; Stauffer, Bernhard; Stocker, Thomas F; Steffensen, Jørgen Peder; Bigler, Matthias; Siggaard-Andersen, Marie-Louise; Udisti, Roberto; Becagli, Silvia; Castellano, Emiliano; Severi, Mirko; Wagenbach, Dietmar; Barbante, Carlo; Gabrielli, Paolo; Gaspari, Vania (2006): Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles. Nature, 440, 491-496 ...