#icecores — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #icecores, aggregated by home.social.
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Not your average compilation of #knowledge!
6 Unusual #Libraries That Aren’t Home to Books https://www.mentalfloss.com/literature/libraries/unusual-libraries-not-home-books
#sourdough - my sister loves this one!
#Puppets #icecores #more! -
Meeting LISA
LISA: the Lightweight In Situ Analysis box is one of a kind; built by our friends at PICE in the Niels Bohr Institute. Later this year we’re taking LISA to Antarctica for the first time ever, to analyse shallow snow and firn cores directly in the field.
This is part of our contribution to the EPIC iQ2300 – a project led by Prof. Arjen Stroeven in Stockholm and organised by the Swedish Polar Research Secretariat.
iQ2300 is a huge project, and we are just a small part of it: the aim is to understand Dronning Maud Land’s evolution from the Holocene and out to 2300. Expect to hear a lot more about this effort in coming months…
Map of Antarctica, I lifted from polar.se : LISA will be visiting the Swedish Wasa station in DML – the top bit on this map – with usNow back to our humble friend.
We hope LISA will help us understand how much snow falls in Dronning Maud Land, how much it varies from year to year and what is the influence of sea ice and far field atmospheric processes on the rate of snowfall. Snowfall is exceptionally difficult to measure and one of our biggest uncertainties in working out Antarctic mass budget and the response of Antarctica to a changing climate (spoiler alert: we might have a paper coming out about this shortly)…
Meet LISA: a view inside the Magic Box..Although LISA has been used in Greenland before, this is quite an experimental deployment, which means potentially really a lot of valuable scientific results. We would ultimately liek to build an Antarctic specific box, but that will have to wait to see if the results of this deployment are as good as we hope. (And some funding – if you are a billionaire with a spare couple of hundred thousand Euros, we’re always interested in talking).
The box itself is conceptually simple but in practice a little complex with a multiplicity of tubes, connectors and spare parts. This means it’s easy to fix if it breaks down, but also we need to understand how it works first.
Some parts of LISA are quite fiddly…Today, the awesome and exceptionally generous Associate Professor Helle Kjær took myself, Stockholm Uni Prof Ninis Rosqvist and our PhD colleague from the Novo Nordisk funded PRECISE project, Clément Cherblanc through the use of the box.
Helle showing Clément the workings inside LISAThere’s a lot to remember and a lot to check but we’re reasonably hopeful we’ll get good results. The aim is to understand both the interannual variability on decadal timescales and the spatial gradients in snowfall accumulation. It’s a huge task, so it’s probably fortunate that we have 6 weeks or so (depending on the weather always!) to try and get it deployed at anumber of different sites which will hopefully allow us to do this.
It’s a big change to my normal fieldwork activities, but also a logical extension of them. And highly complementary to the climate and SMB modelling we are developing.
Nonetheless, ithere’s a lot of new stuff and I have in the past weeks learnt a great deal about transporting very small amounts of mildly hazardous chemicals on airlines, how to deal with customs and pack fragile instruments in large boxes.
Much more to come on this project, so stay tuned…
Clement getting stuck into using the software that measures different properties in the cores.#PolarSekretariatet #AntarcticFieldwork #IceClimate #PolarClimate #Snow #SMB #AtmosphericVariability #iceCores #FirnCores #SnowCores
#Antarctica #AntarcticFieldwork #AtmosphericVariability #climateChange #firn #FirnCores #IceClimate #iceCores #iQ2300 #PolarClimate #PolarSekretariatet #smb #snow #SnowCores
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A volcano or a meteorite? New evidence sheds light on puzzling discovery in Greenland’s ice sheet
#Greenland #Iceland #Volcano #Meteorite #ClimateChange #EarthHistory #IceCore #YoungerDryas #Geology #Earth #Volcanology #SpaceVsEarth #IceCores #Comets
https://the-14.com/a-volcano-or-a-meteorite-new-evidence-sheds-light-on-puzzling-discovery-in-greenlands-ice-sheet/ -
The ice cores drilled in the glaciers of Greenland, Antarctica, and the high mountains around the world provide a high-resolution record of key climate variables that span the extremely brief period in which Homo sapiens appeared and human civilisation developed. One of the largest ever ice cores extracted offers retrospective data extending back over 2.2 million years.
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#IceCores
#ClimateChange -
"An international team of scientists announced [in January] they’ve successfully drilled one of the oldest #IceCores yet, penetrating nearly 2 miles (2.8 kilometers) to #Antarctic bedrock to reach ice they say is at least 1.2 million years old."
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Is a colonial-era drop in CO₂ tied to regrowing forests? - Enlarge / A slice through an ice core showing bubbles of trapped air. (... - https://arstechnica.com/?p=2028113 #carbondioxide #climatechange #reforestation #colonization #earthscience #icecores #science
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Study finds ‘direct evidence’ of #polar amplification on continent as scientists warn of implications of #ice loss. #Antarctica is likely #warming @ almost 2x rate of rest of world & faster than #climatechange models are predicting w far-reaching implications for #global #sealevel rise. #Scientists analysed 78 Antarctic #icecores to recreate temperatures going back 1,000 yrs & found the warming across continent was outside what could be expected from natural swings. https://www.theguardian.com/world/2023/sep/08/antarctica-warming-much-faster-than-models-predicted-in-deeply-concerning-sign-for-sea-levels
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Coolest #Library on Earth
At Univ of #Copenhagen, researchers store #icecores that hold the keys to #Earth’s #climate past and future. Jørgen Peder Steffensen pulled out a plastic-wrapped hunk of #ice containoing the transition from 1 BCE to 1 CE, he says. “That means we have the real Christmas snow.” A bit longer than his arm, doesn’t visibly look different from modern ice. Yet bubbles trapped in it preserve the chemistry of the air in #Greenland from two millennia ago.
https://hakaimagazine.com/features/the-coolest-library-on-earth/ -
For the Saturday afternoon crowd: a brief introduction to our new and supercool #PRECISE project, about #Greenland #Antarctica #Climate emulation, #IceSheet physics #SMB #IceCores and #MachineLearning to get a better grasp on the statistics + uncertainty in #SeaLevelRise projections...
(And now with updated graphic courtesy @rathmann - tak🙏)
http://sternaparadisaea.net/2023/06/16/celebration-time-precise/
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[potholer54] explains why climate change deniers have gotten very excited about an old 4-minute clip of Jørgen Peder Steffensen talking about a graph that shows that Greenland had been warmer than "the present"
https://youtu.be/v9zAtqrDpzY
#ClimateChange #GlobalWarming #Denialism #ClimateScience #IceCores -
Turns out a compressed gas cart is really handy for moving ice cores.
Kicked out of a downstairs lab freezer, I'm using the freight elevator in the Science building to move to another lab freezer at Jet Propulsion Laboratory.
One of these is a section of firn ice from GISP2.
What am I gonna do with these?
Wait and see...... -
The volcano that caused famines in ancient Rome? It was in Alaska - Enlarge / The 10km-wide caldera on Alaska's Unmak Island formed during the 43 BCE Okmok II eruption... more: https://arstechnica.com/?p=1685483 #volcaniceruptions #ptolemaicdynasty #augustuscaesar #ancientegypt #juliuscaesar #ancientrome #archaeology #romanempire #cleopatra #greenland #volcanoes #icecores #science #history #volcano