Palynological data on major Holocene climatic events in NW Iberia

Authors: SOBRINO, CASTOR MUÑOZ¹; RAMIL-REGO, PABLO²; GÓMEZ-ORELLANA, LUIS²; VARELA, RAMÓN ALBERTO DÍAZ²

Source: Boreas, Volume 34, Number 3, August 2005 , pp. 381-400(20)

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Abstract:

Three NW Iberia Cantabrian Mountain pollen records are presented. They reflect the main Holocene climatic shifts in the North Atlantic region as recorded in the isotopic data from Greenland ice, Irish speleothems and reconstructed sea surface temperatures. Two brief forest regression episodes reconstructed from pollen may be synchronous with GH-11.2 and GH-8.2 events. At mid-altitude, two woodland expansion phases (7000-6000 ¹⁴C yr BP and 4000-2500 ¹⁴C yr BP) are separated by a phase of heaths and peat deposits. Major woodland declines occurred during the Galician-Roman Period (which includes the Bronze Age, the Iron Age and the Roman occupation) and from the end of the Medieval Period. The pollen data, backed up by archaeological and historical sources, suggest climatic impact of the Iron Age Cold Period, but are indecisive concerning the Little Ice Age. However, the pollen records do not support any significant `Neoglacial' period (4000-3000 ¹⁴C yr BP) influence on NW Iberia.

Document Type: Original article

DOI: http://dx.doi.org/10.1080/03009480510013006

Affiliations: 1: Dept. Bioloxía Vexetal e Ciencias do Solo, Universidade de Vigo, As Lagoas, Marcosende s/n. ES-36200 Vigo, Spain 2: GI-TTB Lab. Botánica & Biogeografia, IBADER, Universidade de Santiago, ES-27002 Lugo, Spain

Publication date: 2005-08-01