Results 61 to 70 of about 538 (169)

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

AstroComb(v.1.0): non-linear, multi-channel, probabilistic cyclostratigraphic analysis [PDF]

Geoscientific Model Development
We present a new algorithm for constructing floating astronomical timescales with explicit uncertainty estimates from sedimentary sequences. The method integrates probabilistic spectral analysis with inverse geochronological modelling, applied to ultra ...
I. Fernandes, K. Mosegaard, A. L. Sørensen, M. Youssof, N. Thibault, T. W. Dahl   +5 more
doaj   +1 more source

Late Jurassic Carbon Isotope Excursion (Middle Oxfordian Event) Paces With Astronomical Forcing in the Northwestern Tethys

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Marine carbonate carbon isotopes (δ13C), over orbital to multi‐million‐year timescales, provide critical insight into the carbon cycle connecting Earth's atmosphere, lithosphere, hydrosphere and biosphere. However, the influence of astronomical forcing on deep time carbon cycle dynamics remains poorly constrained.
Deyan Zhang, Su Li, Xu Yao, Chuanlong Mou, Ulrich Heimhofer   +4 more
wiley   +1 more source

Laurasian Seaway History During the Early Jurassic From Quantitative Mineralogy and Detrital Zircon Dating

Paleoceanography and Paleoclimatology, Volume 41, Issue 6, June 2026.
Abstract The Laurasian Seaway comprises a N‐S oriented trans‐Pangaean corridor linking Tethys to the Boreal Sea during the Jurassic, and direction of water flow has been the subject of considerable debate. The Llanbedr (Mochras Farm) borehole, Cardigan Bay Basin, Wales, is a uniquely informative record that comprises an expanded deep‐marine silty ...
M. Jiang, S. P. Hesselbo, G. Pieńkowski, E. Krzemińska, J. B. Riding, A. Uchman, D. Salata, C. V. Ullmann   +7 more
wiley   +1 more source

Milankovitch Cycles, New Insights

European Journal of Applied Sciences
Milutin Milankovitch published his influential research “Canon of Insolation and the Ice-age Problem” in Belgrade, Serbia, in 1941. His work is still significant in terms of studying climate changes. In this paper we also consider new scientific knowledge about solar insolation.
openaire   +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

Assessing the Response of Blanket Peatlands to Climate Change Using the DigiBog Model and Winter's Concept of the “Hydrologic Landscape”

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Peatlands are important global carbon stores, but it is unclear whether they will continue as carbon sinks under future climates, or degrade, leaking carbon to the atmosphere. We used the DigiBog peatland development model to explore this question for a blanket peatland in Glen Affric, Scotland, investigating how topography and climate have ...
Andy J. Baird, Dylan M. Young, Jorge A. Ramirez, Peter J. Gill, Paul J. Morris, Nadav Peleg, Althea L. Davies, Richard Tipping, Eileen Tisdall   +8 more
wiley   +1 more source

Interglacials, Milankovitch Cycles, Solar Activity, and Carbon Dioxide [PDF]

Journal of Climatology, 2014
The existing understanding of interglacial periods is that they are initiated by Milankovitch cycles enhanced by rising atmospheric carbon dioxide concentrations. During interglacials, global temperature is also believed to be primarily controlled by carbon dioxide concentrations, modulated by internal processes such as the Pacific Decadal Oscillation
openaire   +1 more source

Research Status and Development Direction of Well Log Cyclostratigraphy

Cejing jishu
Well log cyclostratigraphy has become the foundation for studying many key scientific issues in the field of geosciences by identifying, extracting, and interpreting astronomical cycles recorded by geophysical logs. This paper analyzes the driving forces
PENG Cheng, ZOU Changchun, CAO Jinyu
doaj   +1 more source

Late Quaternary record of 100 ka depositional cycles on the Larache shelf (NW Morocco)

Open Geosciences
This study examines the stratigraphic architecture of the Upper Pleistocene on the Larache margin, NW Moroccan Atlantic, focusing on the impact of glacio-eustatic cycles. Utilizing seismic analysis, we identified four major seismic sequences (UD, UC, UB,
Raki Amine, Jemily Linda, Mhammdi Nadia
doaj   +1 more source