Paraledone octopus
Pareledone is a genus of octopus found only in Antarctic waters. These seafloor dwellers live in shallow water and as deep as 4,000 metres. Genetic analysis found that distinct populations from the Weddell, Amundsen and Ross seas interbred 125,000 years ago, showing that the West Antarctic ice sheet melted during the last #interglacial, a time with climate conditions much like today.
"With each flip from a glacial to an #interglacial #climate there have been sudden, sharp rises in atmospheric #methane, likely from expanding tropical #wetlands.
These great climate flips that ended each #IceAge are known as #terminations.
Full terminations take several thousands of years to complete."
https://phys.org/news/2023-08-methane-earth-climate-termination-level-transition.html
Since 2006, the amount of heat-trapping methane in Earth's atmosphere has been rising fast and, unlike the rise in carbon dioxide (CO₂), methane's recent increase seems to be driven by biological emissions, not the burning of fossil fuels. This might just be ordinary variability—a result of natural climate cycles such as El Niño. Or it may signal that a great transition in Earth's climate has begun.
#Plankton evidence reveals a seasonally ice-free ocean during the Last Interglacial https://phys.org/news/2023-08-plankton-evidence-reveals-seasonally-ice-free.html #protists #forams
A seasonally ice-free Arctic Ocean during the Last #Interglacial: Flor Vermassen et al. https://www.nature.com/articles/s41561-023-01227-x
"A subpolar species associated with #Atlantic water expanded far into the #Arctic Ocean during the #LastInterglacial, analysis of #microfossil content of #SedimentCores reveals. This implies that summers in the #Arctic were ice free during this period."
A subpolar species associated with Atlantic water expanded far into the Arctic Ocean during the Last Interglacial, analysis of microfossil content of sediment cores reveals. This implies that summers in the Arctic were ice free during this period. The findings are published in Nature Geoscience.
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