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  Environmental magnetism study during the Mid-Late Holocene transition and its cultural implications in Mesoamerica

Wogau, K. H., Nowaczyk, N., Böhnel, H. N., Arz, H. W., Molina-Garza, R. (2021 online): Environmental magnetism study during the Mid-Late Holocene transition and its cultural implications in Mesoamerica. - Quaternary International.
https://doi.org/10.1016/j.quaint.2020.12.042

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5004822 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5004822_1
Genre: Journal Article

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 Creators:
Wogau, Kurt H.1, Author
Nowaczyk, N.2, Author              
Böhnel, Harald N.1, Author
Arz, Helge W.1, Author
Molina-Garza, R.O.B.E.R.T.O.S.1, Author
Affiliations:
1External Organizations, ou_persistent22              
24.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146046              

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Free keywords: Environmental magnetism Paleoclimate Paleoenvironmental change Mesoamerica
 Abstract: In the Mesoamerican region, arid or hydrological variable conditions are commonly interpreted from 4 ka onwards. It is not well known how these changes modified the Mesoamerican monsoon system, which were the main atmospheric-oceanic forcings involved and their effect in the Pre-Classic Mesoamerican societies' history. Here, we study the possible link between paleoclimatic changes and decreased social development of societies in Mesoamerica during the Pre-Classic period (4.3 ka to 2.2 ka), which correspond to the Middle-Late Holocene transition. We also describe the principal oceanic-atmospheric mechanism related. We employed a partly laminated sediment sequence from La Alberca maar lake in the central Mexico highlands by means of environmental magnetism and comparing versus X-ray fluorescence (XRF), pollen, and δ18O analyses. Increased concentrations and preservation of ferrimagnetic minerals and enhanced detrital load as described by the XRF Ti counts reveal the occurrence of variable hydrological conditions between ∼4.4 ka to 2.2 ka. These conditions coincide with the onset of high-frequency latitudinal variations of the Intertropical Convergence Zone (ITCZ) and the rise of ENSO and Pacific decadal oscillation activity. We suggest that variable hydrological conditions affected the development of Mesoamerican agrarian societies stressing agricultural production during the Pre-Classic period.

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 Dates: 2021
 Publication Status: Published online
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1016/j.quaint.2020.12.042
GFZPOF: p4 T2 Ocean and Cryosphere
GFZPOF: p4 T5 Future Landscapes
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Title: Quaternary International
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals416
Publisher: Elsevier