What is it about?
Sequences of lake sediments are good sources of this information because they provide continuous and detailed records of palaeoclimatic changes. In order to determine the changes in climate in SE Pampas plain,in this paper we present a series of rock magnetic studies performed on a bottom core collected from Lake La Brava (Argentina).
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Why is it important?
The Pampas Plain is one of the most important zones for agricultural production in Argentina and one of the most likely to be affected by climate changes. To know the natural trends and the anthropogenic effect on the system is extremely necessary. The study of magnetic parameters in shallow lake sediments in the Pampean plain is extremely scarce. Most of the works have been carried out on soils and paleosols or short shallow lake sediment cores for the last 500 years. It is evident the need to obtain longer sequences to better understand long-term variations in environmental changes.
Perspectives
All the results suggest that climate was the major forcing process of regional fluvial system behaviour (erosion and lake level changes) across the catchment area of Lake La Brava from 4800 cal. BP until the beginning of stable human settlement. It was established that anthropogenic influence is the main factor of the changes observed during the twentieth century over imposed to a more humid environment. More studies in the region are needed to reinforce the hypothesis.
Dr María A Irurzun
CIFICEN
Read the Original
This page is a summary of: A high-resolution palaeoclimate record for the last 4800 years from lake la Brava, SE pampas plains, Argentina, Geofísica Internacional, October 2014, Geofisica Internacional,
DOI: 10.1016/s0016-7169(14)70072-8.
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