Palynological evidence for environmental and climatic change in the lower Guadiana valley, Portugal, during the last 13 000 years

Abstract

Pollen analysis of a 48 m AMS radiocarbon-dated sediment sequence

The Impact of Rapid Climate Change on Prehistoric Societies during the Holocene in the Eastern Mediterranean

“…shaded RCC events ~1 0.2 ka; ~8 .6-8.0 ka calBP; ~6 .0-4.2 ka calBP). Regarding the 3.1-2.9 ka calBP RCC in the Western Mediterranean, pollen records indicate the occurrence of short-term arid phases in the southern Iberian Peninsula (Carrión 2002;Fletcher et al 2007). These correspond chronologically with enhanced flood frequencies in the Lower Moulouya Basin of northeast Morocco (Zielhofer et al 2009;in press).…”

Chronology of the sedimentary processes during the postglacial sea level rise in two estuaries of the Algarve coast, Southern Portugal

“…The samples for organic matter analyses, reported by Gonzalez Vila et al (2003), and samples for pollen studies, reported by Fletcher et al (2007) were taken always from the central part of the cores in order to avoid contamination. Pollen and spores, which represent an important source of refractory organic matter, originate from plants growing near the core site and in the (1) Boreholes *G1, *G2, *G3 on the GilãoeAlmargem Estuary; (2) boreholes *CM1, *CM2, *CM3, *CM4, *CM5, *CM6 on the BelicheeGuadiana Estuary.…”

Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia

“…Also, a reorganization of the general atmospheric circulation with a northward shift of the westerlies -a long-term enhanced positive NAO trend -has been interpreted, inducing drier conditions in this area (Magny et al, 2012). Declining summer insolation at these latitudes would have negatively affected the growing season due to cooling, producing further forest decline (Fletcher et al, 2007). …”