Results 11 to 20 of about 3,280 (273)
Clouds and Snowball Earth deglaciation [PDF]
Geophysical Research Letters, 2012 Neoproterozoic, and possibly Paleoproterozoic, glaciations represent the most extreme climate events in post‐Hadean Earth, and may link closely with the evolution of the atmosphere and life.
Dorian S. Abbot +6 more
doaj +7 more sources
Orbital forcing of ice sheets during snowball Earth [PDF]
Nature Communications, 2021 Reconciling the Snowball Earth hypothesis with sedimentological cyclicity has been a persistent challenge. A new cyclostratigraphic climate record for a Cryogenian banded iron formation in Australia provides evidence for orbital forcing of ice sheet ...
Ross N. Mitchell +8 more
doaj +3 more sources
Active methanogenesis during the melting of Marinoan snowball Earth [PDF]
Nature Communications, 2021 The deglaciation of Marinoan snowball Earth (~635 Myr ago) has been associated with potentially extensive CH4 emissions in relation to transient marine euxinia. Here, the authors find that active methanogenesis occurred during the termination of Marinoan
Zhouqiao Zhao +9 more
doaj +2 more sources
Extremely cold ocean temperatures in iron formation brine pools of snowball Earth [PDF]
Nature CommunicationsFor the severe low-latitude “snowball Earth” glaciations, glacial deposits occurring on all continents is well-established. However, cold, salty, ice-covered oceans—a salient prediction of snowball Earth—is difficult to establish geologically.
Kai Lu +4 more
doaj +2 more sources
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
doaj +5 more sources
Moderate greenhouse climate and rapid carbonate formation after Marinoan snowball Earth [PDF]
Nature CommunicationsWhen the Marinoan snowball Earth deglaciated in response to high atmospheric carbon dioxide (CO2) concentrations, the planet warmed rapidly. It is commonly hypothesized that the ensuing supergreenhouse climate then declined slowly over hundreds of ...
Lennart Ramme +2 more
doaj +2 more sources
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
openaire +3 more sources
Marine oxygen production and open water supported an active nitrogen cycle during the Marinoan Snowball Earth [PDF]
Nature Communications, 2017 Snowball Earth glaciations were some of the most extreme climate events in Earth history, and are temporally linked to major biogeochemical changes. Here, using geochemical proxies, the authors show that during the Marinoan glaciation, there was likely ...
Benjamin W. Johnson +2 more
doaj +2 more sources
The radiative feedback continuum from Snowball Earth to an ice-free hothouse [PDF]
Nature CommunicationsPaleoclimate records have been used to estimate the modern equilibrium climate sensitivity. However, this requires understanding how the feedbacks governing the climate response vary with the climate itself.
Ian Eisenman, Kyle C. Armour
doaj +2 more sources
On the initiation of a snowball Earth [PDF]
Geochemistry, Geophysics, Geosystems, 2002 The Snowball Earth hypothesis explains the development of glaciation at low latitudes in the Neoproterozoic, as well as the associated iron formations and cap carbonates, in terms of a runaway ice‐albedo feedback leading to a global glaciation followed by an extreme greenhouse climate.
Daniel P Schrag +2 more
exaly +3 more sources