[Parameters: Topic='PALEOCLIMATE', Term='ICE CORE RECORDS', Variable_Level_1='PARTICULATE MATTER']
EPICA Dome C Ice Core Ionic Chemistry DataEntry ID: NOAA_NCDC_PALEO_2006-026
Abstract: 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 preceded sea-ice reduction,
indicating that multiple mechanisms may be responsible for different phases of
CO2 increase during glacial terminations. We observe no changes in internal
climatic feedbacks that could have caused the change in amplitude of Antarctic
temperature variations observed 440,000 years ago.
Data Set Citation
Dataset Originator/Creator: Wolff, E.W., et al.
Dataset Title: EPICA Dome C Ice Core Ionic Chemistry Data
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2006-026
Dataset Release Date: March 2006
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2006-026
Other Citation Details: NOAA/NCDC Paleoclimatology ProgramOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_dom...
Paleo Temporal Coverage
Paleo Start Date: 740,000 ybp
Paleo Stop Date: 0 ybp
ISO Topic Category
Use Constraints FUNDING SOURCES: This work is a contribution to EPICA, a joint European Science
Foundation/European Commission (EC) scientific programme, funded by the EC
(EPICA-MIS) and by national contributions from Belgium, Denmark, France,
Germany, Italy, The Netherlands, Norway, Sweden, Switzerland and the UK.
Data Set Progress
Distribution Media: online ftp
Distribution Format: ascii, excel
Email: ewwo at bas.ac.uk
British Antarctic Survey CAMBRIDGE CB3 OET
City: High Cross
Province or State: Madingley Road
Country: UNITED KINGDOM
Wolff, E.W., H. Fischer, F. Fundel, U. Ruth, B. Twarloh, G.C. Littot, R.
Mulvaney, R. Rothlisberger, M. de Angelis, C.F. Boutron, M. Hansson, U.
Jonsell, M.A. Hutterli, F. Lambert, P. Kaufmann, B. Stauffer, T.F. Stocker,
J.P. Steffensen, M. Bigler, M.L. Siggaard-Andersen, R. Udisti, S. Becagli, E.
Castellano, M. Severi, D. Wagenbach, C. Barbante, P. Gabrielli, and V. Gaspari.
Southern Ocean sea-ice extent, productivity and iron flux over the past eight
glacial cycles. Nature, Vol. 440, pp. 491-496, 23 March 2006.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2006-04-04
Last DIF Revision Date: 2006-05-12