Pollen counts of sediment core MD95-2039 ...

• Main Authors: Roucoux, Katherine H, de Abreu, Lucia, Shackleton, Nicholas J, Tzedakis, Polychronis C
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: DEPTH, sediment/rock; Exotic grains; Sample volume; Abies; Alnus; Betula; Castanea; Cedrus; Corylus; Fagus; Fraxinus; Olea; Oleaceae; Ostrya; Picea; Pinus; Quercus; Quercus ilex-type; cf. Quercus; Salix; Taxus; Tilia; Ulmus; Pistacia; Phillyrea; Fraxinus ornus; Buxus; Cornaceae; Ephedra distachya; Ephedra fragilis; Frangula alnus; Hippophae rhamnoides; Juniperus; Morus-type; cf. Myrica; Myrtus; Rhamnus; Tamarix; Sambucus; Gramineae; Adonis; cf. Alchemilla; Androsace; Armeria maritima-type; Artemisia; Cannabis-type; Caryophyllaceae; Chenopodiaceae; cf. Chelidonium majus; Chrysosplenium; Greenland; Greenland ice core; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.484979; https://doi.pangaea.de/10.1594/PANGAEA.484979

Pollen and oceanographic data from deep ocean core MD95-2039 provide a centennial to millennial scale record of conditions offshore and of the vegetation of north-west Iberia for the period 10–65 ka. The planktonic oxygen isotope record of this core, reflecting predominantly sea surface temperature (SST), shows a pattern of millennial-scale oscillations that is very similar to climatic changes recorded by the Greenland ice core records over the same interval. In turn, tree populations show a pattern of rapid expansions and contractions that follow the pronounced and abrupt isotopic shifts recorded offshore. Through Marine Isotope Stage (MIS) 3, this millennial-scale pattern of vegetation change, alternating between steppe and open woodland, is superimposed on a longer-term pattern of shrinking ericaceous heathland and decreasing size of successive interstadial tree populations. Trees persisted during the Last Glacial Maximum (LGM), at greater abundance than during many of the coldest episodes of MIS 3. This ... : Pollen was extracted from samples of 4 cm**3 using a modified version of the standard palynological preparation technique (Bennett and Willis, 2002). Modifications include using only a 180 µm sieve, cold acid digestion and omitting acetolysis. See Reference (Roucoux etal., 2005, doi:10.1016/j.quascirev.2004.08.022) for detailed discussion of the method. ...