An environmental snapshot of the Bølling interstadial in Southern Iberia |
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Authors: | Antonio Garcí a-Alix,Gonzalo Jimé nez-Moreno,Francisco J. Jimé nez-Espejo,Fernando Garcí a-Garcí a,Antonio Delgado Huertas |
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Affiliation: | 1. Departamento de Didáctica de la Ciencias Experimentales, Universidad de Granada, Granada, Spain;2. Instituto Andaluz de Ciencias de la Tierra CSIC-UGR, Granada, Spain;3. Departamento de Estratigrafía y Paleontología, Universidad de Granada, Granada, Spain;4. Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan;5. Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan;6. Departamento de Geología, Universidad de Jaén, Jaén, Spain |
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Abstract: | The Bølling–Allerød interstadial is the closest warm time period to the Holocene. The study of the climate variability during this most recent warm scenario provides a natural record of potential environmental changes related with global temperature variations. Little is known about this interstadial in the Southern Iberian Peninsula. Therefore, the exceptional climatic record of the Otiñar paleo-lake (ca. 14.5–14.0 cal ka BP), provides environmental information about the first part of this interstadial (Bølling) in this key region. Although the studied high-resolution isotopic record point to almost invariant hydrological conditions in the paleo-lake, with little change in the carbon budget and important limestone dissolution, the pollen record shows an increase in forest species that can be interpreted as a warming trend and an increase in humidity during the Bølling in the area. This record is one of the few continental archives that show this climatic trend in Southern Iberia, agreeing with many other regional records from the western Mediterranean. This does not agree with higher latitude records that show an opposite trend. This opposite pattern in precipitation between the western Mediterranean and more northern latitudes could be explained by a persistent and increasing negative NAO mode during the Bølling in this area. |
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Keywords: | Latest Pleistocene Bø lling&ndash Allerø d Glacial&ndash interglacial transition Lacustrine sediments Negative NAO mode Southern Iberia |
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