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The Enigma of Neoproterozoic Giant Ooids—Fingerprints of Extreme Climate?
Geophysical Research Letters, 2020 Geologists have documented at least 14 occurrences of “giant ooids,” a geologically rare type of carbonate allochem, in Neoproterozoic successions at low paleolatitudes.
Elizabeth J. Trower
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Model-dependence of the CO2 threshold for melting the hard Snowball Earth [PDF]
Climate of the Past, 2011 One of the critical issues of the Snowball Earth hypothesis is the CO2 threshold for triggering the deglaciation. Using Community Atmospheric Model version 3.0 (CAM3), we study the problem for the CO2 threshold.
W. R. Peltier, F. Ding, J. Yang, Y. Hu
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16th International Conference on Meteorology, Climatology and Atmospheric Physics—COMECAP 2023, 2023 Throughout the history of Earth, significant changes in its climate and consequent alterations to its surface have been recorded. One of the most extreme forms is the complete coverage of the planet by ice, known as Snowball Earth. This theory explains numerous findings from archaeological studies conducted worldwide during the Neoproterozoic Period ...
Angelos Siozos +7 more
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Sea-ice thermodynamics can determine waterbelt scenarios for Snowball Earth [PDF]
Earth System DynamicsSnowball Earth refers to multiple periods in the Neoproterozoic during which geological evidence indicates that the Earth was largely covered in ice. A Snowball Earth results from a runaway ice–albedo feedback, but there is an ongoing debate about how ...
J. Hörner, A. Voigt
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The initiation of modern soft and hard Snowball Earth climates in CCSM4 [PDF]
Climate of the Past, 2012 Geochemical and geological evidence has suggested that several global-scale glaciation events occurred during the Neoproterozoic Era in the interval from 750–580 million years ago. The initiation of these glaciations is thought to have been a consequence
J. Yang, W. R. Peltier, Y. Hu
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Nature Communications, 2023 Based on geochemical and paleontological data, this study shows that habitable open-oceans extended to mid-latitude coastal oceans during the waning stage of the Marinoan snowball Earth, offering refugia for benthic photosynthetic ...
Huyue Song +11 more
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Aftermath of a snowball Earth [PDF]
Geochemistry, Geophysics, Geosystems, 2003 Using a simple 3‐box model of the ocean‐atmosphere system, we simulate the cycling of carbon and strontium in the aftermath of a global glaciation. Model simulations include the delivery of alkalinity to seawater from intense carbonate and silicate weathering under high pCO2 conditions as well as ocean mixing, air‐sea gas exchange, and biological ...
John A. Higgins, Daniel P. Schrag
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Resilience of Snowball Earth to Stochastic Events
Geophysical Research LettersEarth went through at least two periods of global glaciation (i.e., “Snowball Earth” states) during the Neoproterozoic, the shortest of which (the Marinoan) may not have lasted sufficiently long for its termination to be explained by the gradual volcanic
Guillaume Chaverot +8 more
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Analysis of a Precambrian resonance‐stabilized day length
Geophysical Research Letters, 2016 During the Precambrian era, Earth's decelerating rotation would have passed a 21 h period that would have been resonant with the semidiurnal atmospheric thermal tide.
Benjamin C. Bartlett, David J. Stevenson
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China Geology, 2023 : Palaeoclimatic and palaeoenvironmental reconstructions of the Cryogenian Period have attracted attention in relation to the debated “Snowball Earth ” hypothesis and the early evolution of metazoan life.
Xian-yin An +7 more
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