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Polychronis C. Tzedakis on Muck Rack

Polychronis C. Tzedakis

As seen in: Nature, Science Magazine
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Articles

An ice-climate oscillatory framework for Dansgaard-Oeschger cycles

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By Polychronis C. Tzedakis, Laurie Menviel, Luke Skinner, Lev Tarasov
| Nature Verified
Abstract Intermediate glacial states were characterized by large temperature changes in Greenland and the North Atlantic, referred to as Dansgaard–Oeschger (D–O) variability, with some transitions occurring over a few decades.
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Glacial Inception in Marine Isotope Stage 19: An Orbital Analog for a Natural Holocene Climate

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By Feng Q. He, Polychronis C. Tzedakis, Stephen J Vavrus, John E. Kutzbach
| Nature Verified
Abstract The Marine Isotope Stage 19c (MIS19c) interglaciation is regarded as the best orbital analog to the Holocene. The close of MIS19c (~777,000 years ago) thus serves as a proxy for a contemporary climate system unaffected by humans. Our global climate model simulation driven by orbital parameters and observed greenhouse gas concentrations at the end of MIS19c is 1.3 K colder than the reference pre-industrial climate of the late Holocene (year 1850).
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Evolution of vegetation and climate variability on the Tibetan Plateau over the past 1.74 million years

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By Yan Zhao, Gower Street, Polychronis C. Tzedakis
| Science Magazine Verified
Abstract The Tibetan Plateau exerts a major influence on Asian climate, but its long-term environmental history remains largely unknown. We present a detailed record of vegetation and climate changes over the past 1.74 million years in a lake sediment core from the Zoige Basin, eastern Tibetan Plateau. Results show three intervals with different orbital- and millennial-scale features superimposed on a stepwise long-term cooling trend.
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