Results 171 to 180 of about 5,987 (214)

Milankovitch cycles in Neocene deep‐sea sediment

Paleoceanography, 1986
Pelagic carbonate sediments from the world ocean basins commonly show cyclic variations in amount and/or degree of preservation of biogenic calcite, with periodicities of several tens to several hundreds of thousands of years. The direct causes of these cycles are fluctuations in noncarbonate dilution, carbonate production, carbonate dissolution, and ...
Walter E. Dean, James V. Gardner
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Filtering of Milankovitch Cycles by Earth's Geography

Quaternary Research, 1991
AbstractEarth's land-sea distribution modifies the temperature response to orbitally induced perturbations of the seasonal insolation. We examine this modification in the frequency domain by generating 800,000-yr time series of maximum summer temperature in selected regions with a linear, two-dimensional, seasonal energy balance climate model. Previous
David A. Short, John G. Mengel, Thomas J. Crowley, William T. Hyde, Gerald R. North   +4 more
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Filtering of Milankovitch Cycles by the Thermohaline Circulation

Journal of Climate, 1999
A low-order, basin-averaged, coupled atmosphere‐ocean paleoclimate model is developed and the results from a 3.2-Myr model paleointegration described. A three-basin version of the Wright‐Stocker ocean model is used to compute the thermohaline circulation component of the climate system, with a six-basin energy balance atmosphere coupled to the ocean ...
David Brickman, D. G. Wright, William Hyde   +2 more
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Milankovitch cycles and the Arctic: insights from past interglacials

2023
The Arctic is warming at a rate greater than the global average. End-of-summer minimum sea ice extent is declining and reaching new minimums for the historical record of the last 4 decades. The Greenland ice sheet is now losing more mass than it is gaining, with increased surface melting.
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Gender Stereotype and Spatial Reasoning: the Milankovitch Cycles

2017
Stereotype threat, a phenomenon in which learners feel at risk of confirming negative stereotypes about their abilities, is often associated with spatial reasoning abilities in geoscience and has a disproportionately negative effect on women. This study examines how students’ growth or fixed mindsets mediate or amplify the effects of stereotype threat ...
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Exaggerated Milankovitch-Like Eccentricity Cycles and Extreme Exoplanet Climate Variation

2012
Although our solar system features predominantly circular orbits, the exoplanets discovered so far indicate that this is the exception rather than the rule. This could have crucial consequences for exoplanet climates, both because eccentric terrestrial exoplanets could have extreme seasonal variations, and because giant planets on eccentric orbits ...
David S. Spiegel, Sean N. Raymond, Courtney D. Dressing, Caleb A. Scharf, Jonathan L. Mitchell   +4 more
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Milankovitch type cycles in the Lower Carboniferous of NW Ireland

Terra Nova, 1989
ABSTRACTA short description of the Lower Carboniferous near Sligo (NW Ireland) is given. Limestones and mark in four measured sections in the Glencar Limestone were numerically coded as plus and minus one, respectively. Such sequences show good and persistent cyclicity with a basic wave length of 200 cm.
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Milankovitch cycles, eighty years later

Proceedings of 11th International Conference of the Balkan Physical Union — PoS(BPU11), 2023
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Milankovitch Cycles and Sequences: Two Different Stratigraphic Tools

1999
With the introduction of sequence stratigraphy, the word cycle has again become a term which is frequently used. Cycles have been classified in a very arbitrary way into orders of different length and several different orders can occur together in the stratigraphic record.
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