Results 11 to 20 of about 2,064 (153)
Maintenance of the great late Ediacaran ice age [PDF]
Nature CommunicationsGeological records witness extensive glaciations in the late Ediacaran, ranging from ~580 to 560 Ma or younger. However, the explanation of maintenance for this regionally diachronous and globally continuous glacial epoch is still unclear.
Peng Liu +6 more
doaj +2 more sources
Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model [PDF]
Climate of the Past, 2011 We study the initiation of a Marinoan Snowball Earth (~635 million years before present) with the state-of-the-art atmosphere-ocean general circulation model ECHAM5/MPI-OM. This is the most sophisticated model ever applied to Snowball initiation.
A. Voigt +3 more
doaj +1 more source
Journal of Astrobiology & Outreach, 2016 In the ongoing quest to better understand where life may exist elsewhere in the Universe, important lessons may be gained from our own planet. In particular, much can be learned from planetary glaciation events that Earth suffered ∼600 million years ago, so-called `Snowball Earth' episodes. I begin with an overview of how the climate works.
openaire +4 more sources
A conceptual model of oceanic heat transport in the Snowball Earth scenario [PDF]
Earth System Dynamics, 2016 Geologic evidence suggests that the Earth may have been completely covered in ice in the distant past, a state known as Snowball Earth. This is still the subject of controversy, and has been the focus of modeling work from low-dimensional models up to ...
D. Comeau, D. A. Kurtze, J. M. Restrepo
doaj +1 more source
Climate and ocean circulation in the aftermath of a Marinoan snowball Earth [PDF]
Climate of the Past, 2022 When a snowball Earth deglaciates through a very high atmospheric CO2 concentration, the resulting inflow of freshwater leads to a stably stratified ocean, and the strong greenhouse conditions drive the climate into a very warm state.
L. Ramme +3 more
doaj +1 more source
Geophysical Research Letters, 2023 Ocean ventilation is an important regulator for atmospheric CO2 level (pCO2) by affecting the relative proportion of carbon stored in the atmosphere and deep ocean.
Peng Liu +4 more
doaj +1 more source
Frontiers in Earth Science, 2022 The history of the nitrogen cycle on Earth is linked to the redox evolution of the surface environment. Many nitrogen cycle fluxes are microbially mediated, and the particular fluxes operating at any given time in an ecosystem depend on the presence ...
Benjamin W. Johnson +2 more
doaj +1 more source
Sea-ice dynamics strongly promote Snowball Earth initiation and destabilize tropical sea-ice margins [PDF]
Climate of the Past, 2012 The Snowball Earth bifurcation, or runaway ice-albedo feedback, is defined for particular boundary conditions by a critical CO<sub>2</sub> and a critical sea-ice cover (SI), both of which are essential for evaluating hypotheses related to ...
A. Voigt, D. S. Abbot
doaj +1 more source
Simple Stochastic Modeling of Snowball Probability Throughout Earth History
Geochemistry, Geophysics, Geosystems, 2022 Over its multibillion‐year history, Earth has exhibited a wide range of climates. Its history ranges from snowball episodes where the surface was mostly or entirely covered by ice to periods much warmer than today, where the cryosphere was virtually ...
Mark Baum, Minmin Fu
doaj +1 more source
Sensitivity of Neoproterozoic snowball-Earth inceptions to continental configuration, orbital geometry, and volcanism [PDF]
Climate of the Past, 2023 The Cryogenian period (720–635 million years ago) in the Neoproterozoic era featured two phases of global or near-global ice cover termed “snowball Earth”.
J. Eberhard +6 more
doaj +1 more source