Arctic ice across the ages
نویسندگان
چکیده
منابع مشابه
Origin of Ice Ages: Pollen Evidence from Arctic Alaska.
Pollen analysis of radiocarbon-dated samples from the arctic coastal plain of Alaska shows that vegetation of 14,000 years ago reflected a climate colder than the present, and that there has been a progressive warming, culminating in the present cold arctic climate. The record indicates that the Arctic Ocean has been covered with ice since the time of the Wisconsin glacial maximum, suggesting t...
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Can we reconstruct Arctic sea ice back to 1900 with a hybrid approach? S. Brönnimann, T. Lehmann, T. Griesser, T. Ewen, A. N. Grant, and R. Bleisch Institute for Atmospheric and Climate Science, ETH Zürich, Switzerland Received: 14 July 2008 – Accepted: 14 July 2008 – Published: 19 August 2008 Correspondence to: S. Brönnimann ([email protected]) Published by Copernicus Publications on beh...
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Airborne observations of a subvisible midlevel Arctic ice cloud: microphysical and radiative characterization A. Lampert, A. Ehrlich, A. Dörnbrack, O. Jourdan, J.-F. Gayet, G. Mioche, V. Shcherbakov, C. Ritter, and M. Wendisch Alfred Wegener Institute for Polar and Marine Research, 14473 Potsdam, Germany Institut für Physik der Atmosphäre, DLR Oberpfaffenhofen, 82234 Oberpfaffenhofen, Germany J...
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[1] The processes and feedbacks responsible for the 100-kyr cycle of Late Pleistocene global climate change are still being debated. This paper presents a numerical model that integrates (1) long-wavelength outgoing radiation, (2) the ice-albedo feedback, and (3) lithospheric deflection within the simple conceptual framework of coherence resonance. Coherence resonance is a dynamical process tha...
متن کاملEvolution of the early Antarctic ice ages.
Understanding the stability of the early Antarctic ice cap in the geological past is of societal interest because present-day atmospheric CO2 concentrations have reached values comparable to those estimated for the Oligocene and the Early Miocene epochs. Here we analyze a new high-resolution deep-sea oxygen isotope (δ18O) record from the South Atlantic Ocean spanning an interval between 30.1 My...
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ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2010
ISSN: 1752-0894,1752-0908
DOI: 10.1038/ngeo861