Past 200 kyr hydroclimate variability in the western Mediterranean and its connection to the African Humid Periods

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Camuera , J , Ramos-Roman , M J , Jimenez-Moreno , G , Garcia-Alix , A , Ilvonen , L , Ruha , L , Gil-Romera , G , Gonzalez-Samperiz , P & Seppä , H 2022 , ' Past 200 kyr hydroclimate variability in the western Mediterranean and its connection to the African Humid Periods ' , Scientific Reports , vol. 12 , 9050 . https://doi.org/10.1038/s41598-022-12047-1

Title: Past 200 kyr hydroclimate variability in the western Mediterranean and its connection to the African Humid Periods
Author: Camuera, Jon; Ramos-Roman, Maria J.; Jimenez-Moreno, Gonzalo; Garcia-Alix, Antonio; Ilvonen, Liisa; Ruha, Leena; Gil-Romera, Graciela; Gonzalez-Samperiz, Penelope; Seppä, Heikki
Contributor organization: Department of Geosciences and Geography
University of Helsinki
Organismal and Evolutionary Biology Research Programme
Environmental and Ecological Statistics Group
Date: 2022-05-31
Language: eng
Number of pages: 13
Belongs to series: Scientific Reports
ISSN: 2045-2322
DOI: https://doi.org/10.1038/s41598-022-12047-1
URI: http://hdl.handle.net/10138/345848
Abstract: The Iberian Peninsula is located at the intersection between the subtropical and temperate climate zones and the paleoclimate records from this region are key to elucidate the varying humidity and changing dominance of atmospheric circulation patterns in the Mediterranean-North African region in the past. Here we present a quantitative hydroclimate reconstruction for the last ca. 200 kyr from southern Iberian Peninsula based on pollen data from the Padul lake sediment record. We use the newly developed Scale-normalized Significant Zero crossing (SnSiZer) method to detect not only the statistically significant precipitation changes but also to estimate the relative magnitude of these oscillations in our reconstruction. We identify six statistically significant main humid phases, termed West Mediterranean Humid Periods (WMHP 1-6). These humid periods correlate with other West/Central Mediterranean paleohydrological records, suggesting that similar climatic factors affected different areas of the Mediterranean. In addition, the WMPHs are roughly coeval with the African Humid Periods (AHPs) during high seasonality, suggesting the same North Atlantic ocean-atmospheric dynamics and orbital forcing as main drivers of both areas. In contrast, during low seasonality periods, the West Mediterranean still appears to be affected by the westerlies and the local Mediterranean rainfall systems with moderate-to-high precipitation, whereas West Africa was characterized by droughts.
Subject: REGRESSION WA-PLS
CLIMATIC CHANGES
GLACIAL TERMINATION
SEDIMENTARY RECORD
HOLOCENE CLIMATE
POLLEN RECORD
SIERRA-NEVADA
NORTH
VEGETATION
SCALE
1171 Geosciences
1172 Environmental sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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