#paleoclimate — Public Fediverse posts

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/

14-May-2025
#Alaska: Ancient cave sediments provide new #climate clues
Discovery of 20,000-year-old cave #sediments on Prince of Wales Island offers rare land-based evidence of ancient #meltwater events

https://www.eurekalert.org/news-releases/1083622
#science #paleoClimate #glaciers

A new paper by #Judd and #Tierney et al maps temperature and CO2 for the last 485 million years. https://www.science.org/doi/10.1126/science.adk3705

#GavinSchmidt blogged about the new paper: https://www.realclimate.org/index.php/archives/2024/09/phantastic-job/

It raises the global temperature bar to 35°C, and averages around 28 or so.
Their CO2 is almost always about 1000ppm and notably doesn't really follow the temperature evolution in its ups and downs.

The chart from the movie in the toot above on its own.
The paper's main chart doesn't contain CO2, but in the supplement is one. So I copied that to the main chart.

But I feel it is important to digest it together with the information how Earth actually looked when global temperature spiked or dropped. So the movie above is going to be my go-to reference now.
#paleoclimate #PlateTectonic #CO2

A new paper by #Judd and #Tierney et al maps temperature and CO2 for the last 485 million years. https://www.science.org/doi/10.1126/science.adk3705

Not the first attempt, other teams came before, and others will come after.
This one raises the global temperature bar to 35°C, and averages around 28 or so.
Their CO2 is almost always about 1000ppm and notably doesn't really follow the temperature evolution.
#GavinSchmidt blogged about the new paper: https://www.realclimate.org/index.php/archives/2024/09/phantastic-job/

I needed to see their charts in context with the Earth's land-ocean-mountain configuration so I put it all together in a movie, with one of Chris Scotese's tectonics animations. https://www.youtube.com/watch?v=bzvOMee9D1o&t=22s
The two globes are western and eastern hemisphere.

Also, because it was global #ClimateStrike today, the music I added is what #IgorLevit played a day after the big #climate protest in 2019, to honour the millions of people on the streets. "We the people will never be defeated".
#paleoclimate #PlateTectonic #CO2 #Klimastreik #FridaysForFuture

The first paper for our paper club is this recent one from McKay et al., presenting a thorough investigation of the (supposed?) 4.2 ka event. I'd read it when it was published, but just went through again in more detail, and what a good paper. Robust stats (of course, from this group), and they do a really nice job of building the case. I hope the group enjoys it!

#palaeoclimate #paleoclimate #Holocene #Quaternary

https://www.nature.com/articles/s41467-024-50886-w

Increasing Prevalence Of Hot Drought Across Western North America Since The 16th Century
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https://doi.org/10.1126/sciadv.adj4289 <-- shared paper
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#GIS #spatial #mapping #model #modeling #USA #USWest #NorthAmerica #historicrecord #drought #climatechange #anthropogenicwarming #hightemperature #heat #extremeweather #spatialanalysis #spatiotemporal #soil #soilmoisture #temperature #maximum #hydroclimate #paleoclimate #climate #water #hydrology #waterresources #droughts #megadrought #hot #dry

Happily, AQUA plans to run our mentoring program again in 2024. If you are a Quaternary scientist working in Australasia and interested in being either a mentor or mentee, please check out all the details here:

https://aqua.org.au/2024-mentoring-program/

Please feel free to share with colleagues and students who may be interested.

#AusQuaternary #Quaternary #paleoenvironment #paleoclimate #academia

Two consecutive days with #highlatitudedust activity in Patagonia result in a significant large #dust cloud certainly reaching the south central S. Atlantic. Note it is large in extension, but concentrations are just high for the area but low compared to lower latitudes.

#biogeochemical
#paleoclimate