Antarctic ice dynamics and southern ocean surface hydrology during the last glacial maximum

Conference · Tue Jan 01 04:00:00 EST 1985 · Geol. Soc. Am., Abstr. Programs; (United States)

OSTI ID:6463077

Labeyrie, L D; Burckle, L; Labracherie, M; Pichon, J J; Ippolito, P; Grojean, M C; Duplessy, J C

Eight high sedimentation rate cores located between 61/sup 0/S and 43/sup 0/S in the Atlantic and Indian sectors of the Southern Ocean have been studied in detail for foraminifera and diatom /sup 18/O//sup 16/O ratios, and changes in radiolarian and diatom specific abundance. Comparison of these different parameters permits a detailed description of the surface water hydrology during the last glacial maximum. The authors demonstrate that from 25 kyr BP to 15 kyr BP a large number of icebergs formed around the Antarctic continent. Melting along the Polar Front decreased surface salinity by approximately 1.5 per thousand between 43/sup 0/S and 50/sup 0/S. They propose that an increase of snow accumulation at the Antarctic periphery and downdraw during maximum ice extension are primary causes for this major discharge of icebergs.

• Research Organization: CNRS, Gif-Yvette (France)
• OSTI ID: 6463077
• Report Number(s): CONF-8510489-
• Conference Information: Journal Name: Geol. Soc. Am., Abstr. Programs; (United States) Journal Volume: 17
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580100* -- Geology & Hydrology-- (-1989)
ALGAE
ANIMALS
ANTARCTIC REGIONS
ATLANTIC OCEAN
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMISTRY
CHROMOPHYCOTA
DIATOMS
DRILL CORES
EVEN-EVEN NUCLEI
FORAMINIFERA
GLACIERS
HYDROGEN COMPOUNDS
HYDROLOGY
ICE
ICE CAPS
ICEBERGS
INDIAN OCEAN
INVERTEBRATES
ISOTOPE RATIO
ISOTOPES
LIGHT NUCLEI
MELTING
MICROORGANISMS
NUCLEI
OXYGEN 16
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PALEOCLIMATOLOGY
PALEONTOLOGY
PHASE TRANSFORMATIONS
PLANTS
POLAR REGIONS
PROTOZOA
QUANTITATIVE CHEMICAL ANALYSIS
SALINITY
SARCODINA
SEAS
SEAWATER
STABLE ISOTOPES
SURFACE WATERS
WATER
WATER CHEMISTRY