Results 91 to 100 of about 3,413,444 (233)

The glacial cycles and cosmic rays

, 2004
The cause of the glacial cycles remains a mystery. The origin is widely accepted to be astronomical since paleoclimatic archives contain strong spectral components that match the frequencies of Earth's orbital modulation.
Kirkby, J., Mangini, A., Muller, R. A.
core  

Bifurcations and strange nonchaotic attractors in a phase oscillator model of glacial-interglacial cycles [PDF]

, 2015
Glacial-interglacial cycles are large variations in continental ice mass and greenhouse gases, which have dominated climate variability over the Quaternary.
Aihara, Kazuyuki, Crucifix, Michel, Mitsui, Takahito   +2 more
core   +2 more sources

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Astronomical Time Scale of the Late Pleistocene in the Northern South China Sea Based on Carbonate Deposition Record

Journal of Marine Science and Engineering
Variations in solar insolation caused by changes in the Earth’s orbit—specifically its eccentricity, obliquity, and precession—can leave discernible marks on the geologic record.
Chunhui Zhang, Wanyi Zhang, Chengjun Zhang, Liwei Zheng, Shiyi Yan, Yuanhao Ma, Wei Dang   +6 more
doaj   +1 more source

Self-sustained oscillations and global climate changes

Scientific Reports, 2020
The periodic changes of atmospheric CO2 and temperature over the last 5 Myr reveal three features that challenge current climate research, namely: (i) the mid-Pleistocene transition of dominant 41-kyr cycles to dominant 100-kyr cycles, (ii) the absence ...
Luis G. Arnaut, Santiago Ibáñez
doaj   +1 more source

The Synchrosqueezing transform for instantaneous spectral analysis [PDF]

, 2014
The Synchrosqueezing transform is a time-frequency analysis method that can decompose complex signals into time-varying oscillatory components. It is a form of time-frequency reassignment that is both sparse and invertible, allowing for the recovery of ...
Thakur, Gaurav
core  

Glacial Cycles and Milankovitch Forcing

, 2015
Using a recent conceptual model of the glacial-interglacial cycles we present more evidence of Milankovitch cycles being the trigger for retreat and forming of ice sheets in the cycles. This model is based on a finite approximation of an infinite dimensional model which has three components: Budyko's energy balance model describing the annual mean ...
openaire   +2 more sources

The Cenomanian–Turonian boundary interval in the Western Canada Foreland Basin: Stratigraphy, geochemistry, geochronology and sea‐level changes recorded in expanded and condensed clastic successions

The Depositional Record, Volume 11, Issue 5, Page 1200-1258, November 2025.
Shallow‐marine mudstone of the Cretaceous Kaskapau Formation in the British Columbia foredeep preserves a 185 m thick record of OAE2. The organic carbon‐isotope and osmium‐isotope excursions can be correlated in detail with other Cenomanian–Turonian boundary sections around the world.
A. Guy Plint, Darren R. Gröcke, David Selby, Ireneusz Walaszczyk, Sandra L. Kamo, Ian Jarvis, João Trabucho‐Alexandre, Jessica Flynn, Frederick J. Longstaffe, Kienan P. Marion, Bogdan L. Varban, Alice D. C. Du Vivier, David Uličný   +12 more
wiley   +1 more source

Orbitally‐Driven Nutrient Pulses Linked to Early Cambrian Periodic Oxygenation and Animal Radiation

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract During the Cambrian Explosion, episodic radiations of major animal phyla occurred in concert with repeated coupled carbon‐sulfur isotope excursions. These isotope patterns are thought to reflect oscillations in atmospheric and shallow‐marine O2, which promoted animal diversification events. However, the driver for oxygenation pulses is unclear.
Yinggang Zhang, Benjamin J. W. Mills, Robert J. Newton, Tianchen He, Ailsa Roper, Tao Yang, Maoyan Zhu   +6 more
wiley   +1 more source

Glacial cycles drive variations in the production of oceanic crust

, 2014
Glacial cycles redistribute water between oceans and continents causing pressure changes in the upper mantle, with consequences for melting of Earth's interior.
Crowley, John W., Huybers, Peter J., Katz, Richard F., Langmuir, Charles H., Park, Sung-Hyun   +4 more
core   +1 more source