Mastodawn

Snowball Earth wasn’t fully frozen: ice-free oases sheltered early life
#Science #SnowballEarth #Cryogenian #ClimateScience #EarthHistory #EarlyLife #Geology #GarvellachIslands #Sturtian #Marinoan #Paleoclimate #Nature
https://the-14.com/snowball-earth-wasnt-fully-frozen-ice-free-oases-sheltered-early-life/

Snowball Earth wasn’t fully frozen: ice-free oases sheltered early life | The-14

New research reveals Snowball Earth wasn’t fully frozen, with ice-free tropical oases possibly sheltering early complex life during extreme glaciation.

The-14 Pictures

Lukas VFN 🇪🇺Dec 10, 2024

Longer #SnowballEarth deglaciation could have driven multiple phases of #SeaLevelRise and fall https://phys.org/news/2024-12-longer-snowball-earth-deglaciation-driven.html

Melting the #Marinoan Snowball Earth: The impact of #deglaciation duration on the sea-level history of continental margins. By Freya Morris et al. https://www.sciencedirect.com/science/article/pii/S0012821X24005648

"The #Cryogenian period is believed to have played a significant role in the emergence of complex, multicellular life, with animal and algal-based ecosystems beginning to appear once the ice sheets retreated"

Longer Snowball Earth deglaciation could have driven multiple phases of sea level rise and fall

Snowball Earth defines periods of our planet's history when ice spanned the globe, even reaching the equator. The planetary-scale freeze is thought to have been driven by ice sheet expansion triggering a climatic tipping point that led to runaway ice-albedo feedbacks: the ice sheets reflected incoming solar radiation back to space, causing climate cooling and continued ice sheet formation.

Phys.org

Lukas VFN 🇪🇺Apr 29, 2024

What happens after a #SnowballEarth melts? https://mpimet.mpg.de/en/communication/news/was-passiert-wenn-eine-schneeball-erde-schmilzt

Moderate greenhouse #climate and rapid carbonate formation after #Marinoan snowball Earth https://www.nature.com/articles/s41467-024-47873-6 by @TatianaIlyina

"When a snowball Earth deglaciates, the planet transitions rapidly into a hot supergreenhouse climate that persists for a hundred thousand years or more - according to the classic snowball Earth theory. New publication shows that this concept is too simplified."

What happens after a snowball Earth melts?

When a snowball Earth deglaciates, the planet transitions rapidly into a hot "supergreenhouse" climate that persists for a hundred thousand years or more - according to the classic snowball Earth theory. In a new publication, MPI-M scientists Lennart Ramme, Tatiana Ilyina and Jochem Marotzke show that this concept is too simplified, as the ocean transformations after a snowball Earth drive strong carbon cycle dynamics, which alter the evolution of atmospheric CO2. In fact, scenarios ranging from a rapid decline to a further intensification of the supergreenhouse climate are possible, depending on the chemical conditions at the start of the snowball Earth deglaciation.

Matt Willemsen May 27, 2023

“Slushball” Earth: New Evidence Rewrites Ice Age History
New evidence suggests that the Marinoan Ice Age, one of the most severe ice ages in Earth’s history, may not have entirely frozen the planet as previously thought. Instead, it was more of a “Slushball Earth,” with patches of open water supporting life in the shallow mid-latitude seas.
https://scitechdaily.com/slushball-earth-new-evidence-rewrites-ice-age-history/ #slushball #earth #IceAges #marinoan

“Slushball” Earth: New Evidence Rewrites Ice Age History

Geologists have uncovered evidence suggesting that the planet did not experience complete glaciation during the ice age that occurred 635 million years ago. Earth has undergone at least five ice ages, one of which occurred 635 million years ago, resulting in glaciers spanning from one pole to the o

SciTechDaily

Lukas VFN 🇪🇺Apr 4, 2023

#SnowballEarth might have been rather slushy https://phys.org/news/2023-04-snowball-earth-slushy.html

Mid-latitudinal habitable environment for marine #eukaryotes during the waning stage of the #Marinoan snowball glaciation https://www.nature.com/articles/s41467-023-37172-x

Instead of a narrow ice-free belt across the middle of the Earth, patchy ice-free areas may have existed much more widely.

'Snowball Earth' might have been rather slushy: Study

Millions of years ago, the Earth was so cold that most of its surface was covered in ice. But that hard freeze might have been slushier than once thought.

Phys.org