Results 21 to 30 of about 3,280 (273)

Biosignatures of diverse eukaryotic life from a Snowball Earth analogue environment in Antarctica [PDF]

Nature Communications
The ephemeral, supraglacial meltwater ponds of the McMurdo Ice Shelf’s undulating ice serve as analogues for refugia where eukaryotic organisms could have thrived during the Cryogenian period.
Fatima Husain, Jasmin L. Millar, Anne D. Jungblut, Ian Hawes, Thomas W. Evans, Roger E. Summons   +5 more
doaj   +2 more sources

720 Million Years of Arctic Globalization, from Snowball Earth to the Anthropocene: Insights from Paleohistory

Nordicum-Mediterraneum
This article extends our time horizon back 720 million years for a deep-historical examination of the interplay of geological, biological, and climatic dynamics to inform our understanding of Arctic globalization across the eons.
Barry Zellen
doaj   +2 more sources

Elevated CO2 degassing rates prevented the return of Snowball Earth during the Phanerozoic [PDF]

Nature Communications, 2017
Despite dramatic changes in carbon sinks, severe Snowball Earth glaciations have not occurred since the Cryogenian. Here, via the measurement of global subduction zone lengths and carbon cycle modelling, the authors show that a two fold increase in ...
Benjamin J. W. Mills, Christopher R. Scotese, Nicholas G. Walding, Graham A. Shields, Timothy M. Lenton   +4 more
doaj   +2 more sources

Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth [PDF]

Nature Communications, 2019
It remains unclear when and why the world’s oceans, once largely occupied by bacteria, became dominated by photosynthetic algae. Here, using fossil lipids in million year old rocks, the authors show that predation after the Snowball Earth glaciations ...
Lennart M. van Maldegem, Pierre Sansjofre, Johan W. H. Weijers, Klaus Wolkenstein, Paul K. Strother, Lars Wörmer, Jens Hefter, Benjamin J. Nettersheim, Yosuke Hoshino, Stefan Schouten, Jaap S. Sinninghe Damsté, Nilamoni Nath, Christian Griesinger, Nikolay B. Kuznetsov, Marcel Elie, Marcus Elvert, Erik Tegelaar, Gerd Gleixner, Christian Hallmann   +18 more
doaj   +2 more sources

Multiple sulfur isotope evidence for massive oceanic sulfate depletion in the aftermath of Snowball Earth [PDF]

Nature Communications, 2016
Large positive sulphur isotope excursions, recorded in the wake of the Marinoan glaciation have previously been interpreted assuming stable ocean sulphate concentrations.
Pierre Sansjofre, Pierre Cartigny, Ricardo I. F. Trindade, Afonso C. R. Nogueira, Pierre Agrinier, Magali Ader   +5 more
doaj   +2 more sources

The Great Oxidation Event preceded a Paleoproterozoic “snowball Earth” [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Matthew R Warke, Aubrey L Zerkle, Aivo Lepland   +2 more
exaly   +2 more sources

Snowball Earth, population bottleneck and Prochlorococcus evolution. [PDF]

Proc Biol Sci, 2021
Prochlorococcus are the most abundant photosynthetic organisms in the modern ocean. A massive DNA loss event occurred in their early evolutionary history, leading to highly reduced genomes in nearly all lineages, as well as enhanced efficiency in both ...
Zhang H, Sun Y, Zeng Q, Crowe SA, Luo H.
europepmc   +2 more sources

A transient peak in marine sulfate after the 635-Ma snowball Earth [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2022
Yongbo Peng, Huiming Bao, Ganqing Jiang   +2 more
exaly   +2 more sources

Diachronous development of Great Unconformities before Neoproterozoic Snowball Earth [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2020
Rebecca M Flowers, Francis A Macdonald, Christine S Siddoway   +2 more
exaly   +2 more sources

Revealing the climate of snowball Earth from Δ 17 O systematics of hydrothermal rocks [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2015
Daniel Herwartz, Andreas Pack, D P Krylov   +2 more
exaly   +2 more sources