Extreme sensitivity in Snowball Earth formation to mountains on PaleoProterozoic supercontinents. [PDF]
Sci Rep, 2019 During the PaleoProterozoic 2.45 to 2.2 billion years ago, several glaciations may have produced Snowball Earths. These glacial cycles occurred during large environmental change when atmospheric oxygen was increasing, a supercontinent was assembled from ...
Walsh A, Ball T, Schultz DM.
europepmc +2 more sources
The dynamics of the Snowball Earth Hadley circulation for off-equatorial and seasonally varying insolation [PDF]
Earth System Dynamics, 2013 I study the Hadley circulation of a completely ice-covered Snowball Earth through simulations with a comprehensive atmosphere general circulation model.
A. Voigt
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Tracing the Snowball bifurcation of aquaplanets through time reveals a fundamental shift in critical-state dynamics [PDF]
Earth System Dynamics, 2023 The instability with respect to global glaciation is a fundamental property of the climate system caused by the positive ice-albedo feedback. The atmospheric concentration of carbon dioxide (CO2) at which this Snowball bifurcation occurs changes through ...
G. Feulner +3 more
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Radiative effects of ozone on the climate of a Snowball Earth [PDF]
Climate of the Past, 2012 Some geochemical and geological evidence has been interpreted to suggest that the concentration of atmospheric oxygen was only 1–10 % of the present level in the time interval from 750 to 580 million years ago when several nearly global glaciations or
J. Yang, Y. Hu, W. R. Peltier
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Snowball Earth transitions from Last Glacial Maximum conditions provide an independent upper limit on Earth's climate sensitivity [PDF]
Earth System DynamicsGeological evidence of a snowball Earth state indicate persistent tropical sea ice cover during the Neoproterozoic (>635 million years ago). Current theory is that a strengthening of the positive surface albedo feedback with cooling temperatures ...
M. Renoult +6 more
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Did an asteroid impact cause temporary warming during snowball Earth?
, 2022 The ca. 717 Ma low-latitude Sturtian “snowball Earth” glaciation lasted ∼56 Myr. However, sedimentological evidence for transient, open ocean conditions during the glaciation appears to contradict the concept of a global deep freeze.
Mitchell, Ross +6 more
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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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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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