Dust provenance in Antarctic ice during glacial periods: From where in southern South America?
- 12 September 2007
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 34 (17)
Abstract
The origin of dust deposited in East Antarctica is not fully understood yet. This study demonstrates that, contrary to Nd, Sr isotopes are strongly fractionated in the finest‐sized material representing potential dust sources in South America. Analysis of Nd isotopes suggests that Argentine loess, Southern Ocean sediments and Antarctic dust, may all have a related origin or can represent comparable mechanisms of eolian sediment transport and deposition. This analysis also concludes that the Patagonian signature can explain a high proportion of the isotopic composition of dust trapped in Antarctic ice during glacial periods. The Puna‐Altiplano plateau emerges as the second possible important sediment contributor explaining the crustal‐like signature found in East Antarctic dust and should be considered as a potential source area when Quaternary paleoclimate is reconstructed from Argentine loess, Antarctic dust and South Atlantic sediment records.Keywords
This publication has 32 references indexed in Scilit:
- Thermal acclimation of leaf respiration but not photosynthesis in Populus deltoides×nigraNew Phytologist, 2008
- Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South AmericaQuaternary Research, 2004
- Loess of southern South AmericaQuaternary Science Reviews, 2003
- Dust deposition and provenance at the Last Glacial Maximum and present dayGeophysical Research Letters, 2002
- ENVIRONMENTAL CHARACTERIZATION OF GLOBAL SOURCES OF ATMOSPHERIC SOIL DUST IDENTIFIED WITH THE NIMBUS 7 TOTAL OZONE MAPPING SPECTROMETER (TOMS) ABSORBING AEROSOL PRODUCTReviews of Geophysics, 2002
- Late-glacial and Holocene palaeoenvironmental change in the central Strait of Magellan, southern PatagoniaPalaeogeography, Palaeoclimatology, Palaeoecology, 2001
- Dust transport to Dome C, Antarctica, at the Last Glacial Maximum and present dayGeophysical Research Letters, 2001
- Late Pleistocene sea level variations derived from the Argentine ShelfGeochemistry, Geophysics, Geosystems, 2000
- Dust: A Diagnostic of the Hydrologic Cycle During the Last Glacial MaximumScience, 1996
- The nature, distribution and formation of pans in arid zonesEarth-Science Reviews, 1995