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Showing 1–14 of 14 results
Advanced filters: Author: P. C. Tzedakis Clear advanced filters

  • A simple model, based on only summer insolation energy and time since the previous deglaciation, correctly predicts the deglaciation history of the past 2.6 million years, including the change in frequency of glacial–interglacial cycles about one million years ago.

    • P. C. Tzedakis
    • M. Crucifix
    • E. W. Wolff
    Research
    Nature
    Volume: 542, P: 427-432

  • Periodic iceberg discharges during the last glacial period led to a slowdown of the Atlantic meridional overturning circulation. Sediment records from the Portuguese margin show that similar events punctuated the penultimate glacial period as well, although their duration and broader climatic impacts were modified by different background climate conditions.

    • V. Margari
    • L. C. Skinner
    • N. J. Shackleton
    Research
    Nature Geoscience
    Volume: 3, P: 127-131

  • Attempts to place Palaeolithic events in climatic context are hampered by the difficulty of calibrating the radiocarbon calendar beyond around 21,000 radiocarbon years ago, and the absence of a 'master' calendar chronology for climate events. But this is circumvented by relating radiocarbon years to the paleoclimatic record through the excellent Cariaco Basin deep-sea record. In this way it is possible to relate the disappearance of Neanderthals in Europe to known climatic events.

    • P. C. Tzedakis
    • K. A. Hughen
    • K. Harvati
    Research
    Nature
    Volume: 449, P: 206-208

  • The length of time the present interglacial would last in the absence of anthropogenic forcing is debated. An alignment of the Holocene and MIS 19c on the basis of the occurrence of the bipolar seesaw suggests that the present interglacial would last another 1,500 years, provided atmospheric CO2 concentrations fell below 240 parts per million by volume.

    • P. C. Tzedakis
    • J. E. T. Channell
    • L. C. Skinner
    Research
    Nature Geoscience
    Volume: 5, P: 138-141

  • Past interglacials can be thought of as a series of natural experiments in which boundary conditions varied considerably. Examination of the palaeoclimate record of the past 800,000 years reveals a large diversity among interglacials in terms of their intensity, duration and internal variability.

    • P. C. Tzedakis
    • D. Raynaud
    • T. Kiefer
    Reviews
    Nature Geoscience
    Volume: 2, P: 751-755

  • This study presents a new definition of interglacials during the Quaternary. The authors find the appearance of interglacials is in general following the 41-kyr cycle of obliquity with various exceptions, suggesting a more complex physical mechanism triggering glacial terminations.

    • Peter Köhler
    • Roderik S. W. van de Wal
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-10

  • New genome-wide data for ancient, Bronze Age individuals, including Minoans, Mycenaeans, and southwestern Anatolians, show that Minoans and Mycenaeans were genetically very similar yet distinct, supporting the idea of continuity but not isolation in the history of populations of the Aegean.

    • Iosif Lazaridis
    • Alissa Mittnik
    • George Stamatoyannopoulos
    Research
    Nature
    Volume: 548, P: 214-218

  • Interstadial North Atlantic warming during the last glacial period involved the operation of both fast and slow components of the coupled atmosphere–ocean–sea-ice system, according to analyses from the Portuguese Margin and climate model simulations.

    • Vasiliki Margari
    • Luke C. Skinner
    • Polychronis C. Tzedakis
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 1, P: 1-9