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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/cp-2019-130
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2019-130
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 06 Nov 2019

Submitted as: research article | 06 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Climate of the Past (CP).

Climatic subdivision of Heinrich Stadial 1 based on centennial-scale paleoenvironmental changes observed in the western Mediterranean area

Jon Camuera1,2, Gonzalo Jiménez-Moreno2, María J. Ramos-Román1, Antonio García-Alix2,3, Francisco Jiménez-Espejo3, Jaime L. Toney4, R. Scott Anderson5, and Cole Webster5 Jon Camuera et al.
  • 1Department of Geosciences and Geography, Faculty of Science, University of Helsinki, Finland
  • 2Departamento de Estratigrafía y Paleontología, Universidad de Granada, Spain
  • 3Instituto Andaluz de Ciencias de la Tierra (IACT), Consejo Superior de Investigaciones Científicas-Universidad de Granada (CSIC-UGR), Granada, Spain
  • 4School of Geographical and Earth Sciences, University of Glasgow, UK
  • 5School of Earth and Sustainability, Northern Arizona University, USA

Abstract. Heinrich Stadial 1 (HS1) is one of the most extreme climate periods of the last glacial cycle, generating extremely low sea surface temperatures (SST) and significant changes in terrestrial landscape (e.g., vegetation). Previous studies show that overall cold/dry conditions occurred during HS1, but the lack of high-resolution records precludes whether climate was stable or instead characterized by instability. A high-resolution paleoclimatic record from Padul (southern Iberian Peninsula), supported by a robust chronology, shows that climate during HS1 was non-stationary and centennial-scale variability in moisture is superimposed on this overall cold climatic period. In this study we improve the resolution and suggest a novel subdivision of HS1 in 7 sub-phases, including: i) 3 sub-phases (a.1–a.3) during an arid early phase (HS1a; ∼18.4–17.2 kyr BP), ii) a humid middle phase (HS1b; ∼17.2–16.7 kyr BP), and iii) 3 sub-phases (c.1–c.3) during an arid late phase (HS1c; ∼16.7–15.6 kyr BP). This climatic subdivision is regionally supported by SST oscillations from the Mediterranean Sea, suggesting a strong land-ocean relationship. A cyclostratigraphic analysis of our pollen data indicates that HS1 climate variability, and thus this subdivision, is characterized by &sim:2000 and ∼800-yr periodicities, suggesting solar forcing controlling climate in this area.

Jon Camuera et al.
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Early record of Heinrich Stadial 1 (pollen data from Padul, southern Spain) J. Camuera, G. Jiménez-Moreno, M. J. Ramos-Román, A. García-Alix, F. J. Jiménez-Espejo, J. L. Toney, S. Anderson, and C. Webster https://doi.pangaea.de/10.1594/PANGAEA.904053

Jon Camuera et al.
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Short summary
This study presents a unique high-resolution terrestrial paleoclimate record between 20,000 and 11,000 cal yr BP from the Padul wetland (S Spain) that allowed the identification of 3 main phases within the cold and arid Heinrich Stadial 1 (HS1) and, for the first time, a further subdivision of HS1 in 7 centennial-scale sub-phases.
This study presents a unique high-resolution terrestrial paleoclimate record between 20,000 and...
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