#climate #petm

An ancient warming event may have lasted longer than we thought
https://phys.org/news/2025-05-ancient-event-longer-thought.html

Attention-Worthy Links for December 22nd, 2024

https://bit.ly/awl122324

#BCI #Neurotech #ALS #paralysis #neuromodulation #oaks #PETM #Quercus #temperate #Northern #Hemisphere #Southeast #sea #level #rise #NOAA #tides #Greenland #sinking #TikTok #Ban #Influencers #Extinction #dinosaurs #extinction #climate #volcano #meteor #Chicxulub

“"De klimaatverandering in het PETM ging ongeveer tien keer zo langzaam als wat wij nu doen", zegt Sluijs. In de afgelopen eeuw is de aarde ruim 1 graad opgewarmd, en we stevenen af op bijna 3 graden in 2100.”

Aarde: “Seen that done that.”
Mensheid: “We are done.”

#OpwarmingVanDeAarde
#Overstromingen
#PETM

Overstromingen Spanje waren echo van klimaatverandering in prehistorie https://www.nu.nl/klimaat/6339767/overstromingen-spanje-waren-echo-van-klimaatverandering-in-prehistorie.html

Congratulations to Dr. Pascale Daoust, who successfully defended, "Ocean Acidification: Insights from the Behaviour of Ancient and Modern Carbonates", supervised by Al Mucci and Galen Halverson.

The work involved field and laboratory studies of the Paleocene-Eocene Thermal Maximum section near Campo, Spain.

The figure shows the depositional environments at the time; from Daoust et al, submitted, modified from Pujalte et al. (2014)

#McGillUniversity #EarthSystemScience #Carbonates #PETM

🚨new #preprint🚨
Age depth models are crucial to determine the timing and rate of past change, but are often based on simplified model assumptions that result in convenient mathematics. We built two new methods to estimate them from complex #stratigraphic and #sedimentological data to produce empirically realistic age-depth models 😁
It's open #PeerReview
@Emiliagnathus

Fig: 3 scenarios for the #petm, showing fluctuations in sed. rates by a factor of 20!

https://egusphere.copernicus.org/preprints/2024/egusphere-2024-2857/

@Life_is @geist @Kmachel Und bei einer Durchschnittstemperatur von 10 oder 15 Grad mehr findet das Leben von Säugetieren wie uns dann eben in Nordkanada, auf Grönland, auf Spitzbergen und in der Antarktis statt. Das hat es alles vor Jahrmillionen schon einmal gegeben, #PETM

Earth's Orbit Mysteriously Altered by Chance Encounter Million of Years Ago
https://www.sciencealert.com/earths-orbit-mysteriously-altered-by-chance-encounter-million-of-years-ago #astronomy #climate #Paleocene #Eocene #warming #PETM #earth #orbit #star

Idiosyncratic #paleontology paper of the week for #fossilfriday: studies of the #Paleocene-#Eocene Thermal Maximum (#petm) focus on some animals (👋 mammals!), leaving others behind (👋 #turtles!). Here's a fun contribution to rebalancing:

A pan-chelydrid, Chelydropsis aubasi sp. nov., from the Middle Eocene (MP 15, early Bartonian) of Chéry-Chartreuve, France
Walter G. Joyce, Jean-Luc Landréat, Yann Rollot
The Anatomical Record
https://doi.org/10.1002/ar.25001

#paleobiology #fossil #SnappingTurtle

Read this article about #methane #hydrates observed off the coast of Africa moving 40km from deep-cold waters to the continental shelf:
https://scitechdaily.com/fire-ice-time-bomb-discovered-climate-changes-deep-ocean-threat/

Relevant because one of the leading theories for what caused the #PETM (jump in #CO2 and #temperatures at 55 Ma) is the #clathrate gun-- frozen methane in the abyssal ocean thawing & causing sudden warming.
https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis
But it hinges on methane being shallow enough to being vulnerable to melt.

Not time to panic, but wow.

#PETM. Kein neuer Kunststoff, aber der Stoff, aus dem die Geschichte der nächsten 200.000 Jahre gemacht wird. https://www.spektrum.de/news/methan-ursache-fuer-uralten-klimawandel-wohl-gefunden/2191755 Und zum Nachlesen, ob Lars Fischer das auch alles richtig aufgeschrieben hat, hier gleich noch der passende Wikipedia-Eintrag: https://de.wikipedia.org/wiki/Pal%C3%A4oz%C3%A4n/Eoz%C3%A4n-Temperaturmaximum

#NewPaper #Paleoclimatology #PETM

Jones, M. T., Stokke, E. W., Rooney, A. D., Frieling, J., Pogge von Strandmann, P. A. E., Wilson, D. J., Svensen, H. H., Planke, S., Adatte, T., Thibault, N., Vickers, M. L., Mather, T. A., Tegner, C., Zuchuat, V., and Schultz, B. P.: Tracing North Atlantic volcanism and seaway connectivity across the Paleocene–Eocene Thermal Maximum (PETM), Clim. Past, 19, 1623–1652, https://doi.org/10.5194/cp-19-1623-2023, 2023.

North Atlantic #volcanic activity was a major driver of #climate change 56 million years ago https://phys.org/news/2023-08-north-atlantic-volcanic-major-driver.html

Tracing North #Atlantic #volcanism and seaway connectivity across the #PaleoceneEoceneThermalMaximum (#PETM) https://cp.copernicus.org/articles/19/1623/2023/

"The #Paleocene–#Eocene Thermal Maximum (PETM) is a period of #GlobalWarming that occurred ~56 million years ago, lasting approximately 200,000 years, when the #Earth experienced global surface #temperature elevations of ~5°C."

Ursache für urzeitliches Wärme-Maximum gefunden. Methanspeiende Schlote im Atlantik könnten Erwärmung vor 55 Millionen Jahren ausgelöst haben. #PETM #Klimageschichte #Temperaturmaximum #Palaeoklima #Methan #Vulkane
https://www.scinexx.de/news/geowissen/ursache-fuer-urzeitliches-waerme-maximum-gefunden/

Unterwasservulkane helfen, prähistorische Klimaerwärmung #PETM zu erklären - Neue Studie zeigt: Vulkanismus vor 56 Millionen Jahren setzte mehr Methan frei als angenommen: #Pressemitteilung: https://www.geomar.de/news/article/unterwasservulkane-helfen-praehistorische-klimaerwaermung-zu-erklaeren Original-Publikation: https://www.nature.com/articles/s41561-023-01246-8 #IODP

The Surprising Connection Between Earth's Orbital Patterns and an Ancient Warming Event
#EarthOrbitalPattern
#PETM
#PaleoceneEoceneThermalMaximum
#AncientGlobalWarming

An international team of scientists has suggested that changes in Earth's orbit that resulted in hotter conditions may have played a role in triggering a rapid global warming event that occurred 56 million years ago. This event, known as the Paleocene-Eocene Thermal Maximum (PETM), is considered to

https://scitechdaily.com/orbit-of-doom-the-surprising-connection-between-earths-orbital-patterns-and-an-ancient-warming-event/

I needed to know where the #Tolkien #LotR names come from in above article about the sudden warming and sudden halt to that warming in the #PETM.
Turns out it's a whole cluster of #MiddleEarth names on or near the Rockall Plateau. And some belong officially to #Ireland as their Marine department states in their article on "The real map of Ireland": https://www.marine.ie/site-area/irelands-marine-resource/real-map-ireland-0

But not all.
Here are all worldwide officially approved seafloor features named after Tolkien's Middle earth:

Edoras Bank, -22.166667, 56
Eriador Seamount, -25.333333, 54.833333
Fangorn Bank, -20.166667, 55.5
Gondor Seamount, -23.833333, 54.25
Lórien Knoll, -19.83333, 54.16667
Rockall Plateau, -18.83333, 56.33333
Rohan Seamount, -22.333333, 54.75
Isengard Ridge, -21, 52.416667

This last one is East of Argentina:
Hornburg Hill, -50.3508, -41.93471

Found them all here in the official global catalogue of named seafloor features: https://www.ngdc.noaa.gov/gazetteer/ by choosing a vector and exporting the results to CSV. Do it a few times to get all angles of the globe. Then a onliner #AWK for $0 ~/Tolkien/ and Bob's my uncle.

This long and interesting blogpost covers the Rockall / Gondor / Eriador area in more detail https://www.volcanocafe.org/rockall-the-lost-continent-of-middle-earth/ wrt #geology and history.
But the idea that all those mounts between Scotland and Greenland might have been "hop-able" is curious. Sea level must have been far higher than today. 65m higher from the polar ice caps, then add all the small mountain glaciers. AND it was so much warmer and hence, sea water had expanded, too. Dunno what the term is now, thermosteric or thermostatic or something?
But in any case, paired with the article in #1, a read well worth my time.
I even took away something for my quest wrt #AMOC slowdown because the area is in the region of the #ColdBlob

Impressed by the article!! https://arstechnica.com/science/2023/01/scientists-image-remains-of-volcanic-burst-that-triggered-massive-warming/
Very cool writeup by Howard Lee with links to other interesting recent papers on the mysterious #Paleocene #Eocene Thermal Maximum #PETM 56 million years ago. Fascinating!
So – near Greenland, there are ancient volcanic areas and they were responsible for #CO2 and #CH4 increase, and also for the sudden stop to the warming.

The areas are named #Eriador and #Gondor – who'd have thunk? Did #Tolkien get the names from #geology or was the naming done by geologists to honour the writer? Howard Lee could have added this little info. But maybe he hasn't read Lord of the Rings #LotR.

@carlschroedl
Impressed by the article!! https://arstechnica.com/science/2023/01/scientists-image-remains-of-volcanic-burst-that-triggered-massive-warming/
Very cool writeup by Howard Lee with links to other interesting recent papers on the mysterious #Paleocene #Eocene Thermal Maximum #PETM 56 million years ago. Fascinating!
So – near Greenland, there are ancient volcanic areas and they were responsible for #CO2 and #CH4 increase, and also for the sudden stop to the warming.

The areas are named #Eriador and #Gondor – who'd have thunk? Did #Tolkien get the names from #geology or was the naming done by geologists to honour the writer? Howard Lee could have added this little info. But maybe he hasn't read Lord of the Rings #LotR.

I'm thinking about The Paleocene–Eocene thermal maximum #PETM