Results 71 to 80 of about 9,559 (293)
Holocene vegetation change and fire–plant diversity shifts in Mediterranean France
Journal of Quaternary Science, EarlyView.ABSTRACT Changes in fire activity are recognized as a major threat to biodiversity and vegetation communities across the Mediterranean Basin. However, long‐term fire–vegetation interactions remain poorly investigated. Here, we combine a high‐resolution charcoal record with pollen data from the “Étang des Aulnes” lake (southern France) to reconstruct ...
Cécile Latapy +13 more
wiley +1 more source
Geophysical Research LettersThe ocean carbon reservoir controls atmospheric carbon dioxide (CO2) on millennial timescales. Radiocarbon (14C) anomalies in eastern North Pacific sediments suggest a significant release of geologic 14C‐free carbon at the end of the last ice age but ...
R. A. Green, M. P. Hain, P. A. Rafter
doaj +1 more source
The U-series Toolbox for Paleoceanography
Reviews in Mineralogy and Geochemistry, 2003 The geochemistry of marine sediments is a major source of information about the past environment. Of the many measurements that provide such information, those of the U-series nuclides are unusual in that they inform us about the rate and timescales of processes. Oceanic processes such as sedimentation, productivity, and circulation, typically occur on
Henderson, G, Anderson, R
openaire +2 more sources
Limited North Atlantic shallow water ventilation over the past 200 years
, 2010 The 10th International Conference on Paleoceanography, University of California, San Diego, CA., 29 August-3 September ...
Hughen, K, Goodkin Emami, NF, Druffel, E
core
Journal of Quaternary Science, EarlyView.ABSTRACT Upland farming in Europe is frequently assumed to have been limited and precarious, despite relict spade‐dug ridges providing firm evidence of past crop growing. Direct evidence for crop types in post‑Medieval to Modern (~since 1500 CE) uplands is rare; yet, in Ireland, relict spade‐dug ridges that date to this period are commonly interpreted ...
Helen Essell, Gill Plunkett
wiley +1 more source
Frontiers in Marine ScienceThe nitrogen isotopic composition of shell-bound organic matter in planktonic foraminifera (FB-δ15N) is widely used as a proxy for past ocean deoxygenation because water-column denitrification in oxygen-deficient zones (ODZs; [O2] < 5 µmol/kg ...
Tianshu Kong +5 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2020 The trace element and isotopic composition of foraminifera shells are widely used in paleoceanography to reconstruct past ocean conditions. Individual foraminifer analysis (IFA) is a rapidly expanding technique for obtaining trace element and/or isotope ...
Jennifer Fehrenbacher +2 more
doaj +1 more source
, 1986 Second International Conference on Paleoceanography, 6-13 September 1986, Woods Hole Oceanographic Institution, Woods Hole, MassachusettsInternational Union of Geological Sciences (IUGS); Commission for Marine Geology (CMG); International Commission for ...
Woods Hole Oceanographic Institution
core
Managing and visualising geochemical data for tephra correlation with the IntChron Integration Tool
Journal of Quaternary Science, EarlyView.ABSTRACT There is now a wealth of glass‐shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compilation of published data to assess tephra correlations leads to large files and requires careful management.
Victoria C. Smith +5 more
wiley +1 more source
Eocene-Pliocene deep sea ostracodes from ODP site 744A, Southern Indian Ocean
Anais da Academia Brasileira de Ciências, 2010 The Eocene-Pliocene deep sea ostracodes from the ODP site 744A (Kerguelen Plateau) are herein studied under the taxonomic and paleoecologic aspects. 28 species are identified, being the genera Krithe, Cytherella and Dutoitella the most diversified.
Cristianini T. Bergue, Abiraman Govindan
doaj +1 more source