Snowball Earth at low solar luminosity prevented by the ocean–atmosphere coupling
Sign Up to like & getrecommendations! Published in 2019 at "Acta Geochimica"
DOI: 10.1007/s11631-019-00373-7
Abstract: The standard solar model proposes that the solar luminosity was 30% lower than the present level at 4.5 billion years ago (Ga). At low solar radiation, the climate model predicts that the Earth should have… read more here.
Keywords: atmospheric co2; level; co2 level; snowball earth ... See more keywords
Sr and Mg isotope geochemistry of the basal Ediacaran cap limestone sequence of Mongolia: Implications for carbonate diagenesis, mixing of glacial meltwaters, and seawater chemistry in the aftermath of Snowball Earth
Sign Up to like & getrecommendations! Published in 2018 at "Chemical Geology"
DOI: 10.1016/j.chemgeo.2018.05.008
Abstract: Abstract The seawater chemistry and oceanographic information associated with Snowball Earth are commonly inferred from the geochemistry of cap carbonates deposited on continental margins during and after deglaciation. However, interpretation of such records can be… read more here.
Keywords: carbonate diagenesis; chemistry; geochemistry; snowball earth ... See more keywords
The impact of Snowball Earth glaciation on ocean water δ18O values
Sign Up to like & getrecommendations! Published in 2021 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2020.116661
Abstract: Abstract It has been long recognized that glacial episodes can affect the δ 18 O value of ocean water, where preferential storage of 16O in ice changes the 18O/16O ratio of the ocean. However, these… read more here.
Keywords: volume; water; snowball earth; ocean water ... See more keywords
Germanium/silica ratio and rare earth element composition of silica-filling in sheet cracks of the Doushantuo cap carbonates, South China: Constraining hydrothermal activity during the Marinoan snowball Earth glaciation
Sign Up to like & getrecommendations! Published in 2019 at "Precambrian Research"
DOI: 10.1016/j.precamres.2019.105407
Abstract: Abstract The rapid diversification of eukaryotes within 3 million years after the Marinoan global glaciation suggests the potential linkage between the snowball Earth event and biological evolution. To understand how the global glaciation and the… read more here.
Keywords: silica; glaciation; sheet; snowball earth ... See more keywords
Extreme sensitivity in Snowball Earth formation to mountains on PaleoProterozoic supercontinents
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-38839-6
Abstract: 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 numerous… read more here.
Keywords: formation mountains; sensitivity; snowball earth; earth ... See more keywords
The snowball Earth transition in a climate model with drifting parameters: Splitting of the snapshot attractor.
Sign Up to like & getrecommendations! Published in 2019 at "Chaos"
DOI: 10.1063/1.5108837
Abstract: Using an intermediate complexity climate model (Planet Simulator), we investigate the so-called snowball Earth transition. For certain values (including its current value) of the solar constant, the climate system allows two different stable states: one… read more here.
Keywords: climate; snowball earth; transition; attractor ... See more keywords
Snowball Earth climate dynamics and Cryogenian geology-geobiology
Sign Up to like & getrecommendations! Published in 2017 at "Science Advances"
DOI: 10.1126/sciadv.1600983
Abstract: We review recent observations and models concerning the dynamics of Cryogenian global glaciation and their biological consequences. Geological evidence indicates that grounded ice sheets reached sea level at all latitudes during two long-lived Cryogenian (58… read more here.
Keywords: climate dynamics; dynamics cryogenian; geology; snowball earth ... See more keywords