#ice-sheets — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #ice-sheets, aggregated by home.social.
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If we breach climate tipping points, climate change will continue even if we do reach net zero.
A letter to the Sheffield Star.
Dear Editor
In Friday’s Star, you highlighted a quote from Baroness Brown, who chairs the Climate Change Committee’s adaptation work. She said, “It gets worse from here. Until we get to Net Zero, things go on getting worse.”
Unfortunately, they may carry on getting far worse after we reach Net Zero.
We are dangerously close to climate tipping points, and if these are breached, our planet will no longer be a safe home for us. For instance, if the Atlantic Meridional Overturning Circulation collapses, our weather will be like the Ice Age in winter and extremely hot in summer, making it impossible to grow crops. Or if giant ice sheets collapse in the Arctic or Antarctic, sea levels will rise and likely flood most of our best agricultural land. Or when areas of the tundra melt, large emissions of the potent greenhouse gas methane will be released, further increasing climate change.
Governments must stop dilly-dallying and get on a war footing to end our addiction to fossil fuels. They should be showing the Climate Emergency Briefing film to the public so everyone understands the extreme threats we face. Baroness Brown is right about one thing: this isn’t the new normal. Things will continue to get worse, so we need massive investment in adaptation so we can cope better with extreme heat, floods, fires, droughts, and storms.
As we have watched awful fires scorch many of our green spaces this week, it gives me no pleasure to say, “I told you this would happen”. And still, the Fire Brigade lacks the resources needed to adequately cope with so many fires. We don’t even have a single firefighting plane in this country.
Instead of leading on adaptation to keep us safe, Andy Burnham is expanding airports and debating opening yet more climate-changing oil and gas fields in the North Sea. Surely this record-breaking summer should be a wake-up call for him?
Yours sincerely
Graham Wroe
#Adaptation #AndyBurnham #AtlanticMeridionalOverturningCirculation #BaronessBrown #ClimateEmergencyBriefing #FireBrigade #IceSheets #methane #NetZero #SheffieldStar #TippingPoints -
Romero et al present an ice-free and paleo sea level chronology for James Ross Island in the northeastern Antarctic Peninsula area. They found that the advance of the local ice cap happened sometime after 40,000 years ago, and this implies a period of retreated ice in MIS 3.
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A robot swarm is on a mission to map #Greenland’s perilous #icesheets
The fleet of drones, subs and sensors will map ice melt to forecast #climate #tippingpoints
Data from expedition funded by #UK’s secretive new inventions agency, will feed into climate models. Idea is to forecast when #ice melt will tip climate-regulating ocean currents into shutdown, and try to develop early warning system that would let humanity know when #glaciers are changing
https://www.sciencenews.org/article/robot-mission-map-greenland-ice-climate
https://archive.ph/OaxnC -
Isostatic depression (Glaciology 🗻)
Isostatic depression is the sinking of large parts of the Earth's crust into the asthenosphere caused by a heavy weight placed on the Earth's surface, often glacial ice during continental glaciation. Isostatic depression and isostatic rebound occur at rates of centimeters per year. Greenland is an example of an isostatically depressed ...
https://en.wikipedia.org/wiki/Isostatic_depression
#IsostaticDepression #IceSheets #Glaciology #Geodynamics #Depressions
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There is always debate of the archeological sites in the Americas that are older than 13 ka, but years ago they found evidence of people in Yukon from before the LGM. Why is this not talked about? The age here (41 ka) provides plenty of time to traverse the ice free corridor.
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McCormack et al make an assessment of predictions of ice loss from Antarctica, and state that the current models are likely provide accurate projections for the next 30 years, before completely diverging by 2080.
They hope for more model improvements, but from my experience it is incredibly difficult since collecting the data that would help with this (for instance, gathering high resolution subglacial topography and basal conditions data) is extremely expensive. Most governments are cutting funding now.
This doesn't even get into the computational challenges of properly modelling the ice physics. The approximations that we often use do not properly capture the subtleties of ice flow and calving, but the full equations are difficult to solve and are computationally intensive. It is a big challenge.
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How is this for a feedback loop?
Ice sheets build up during a glaciation lowering global sea level → reduced water load leads to increased mid ocean ridge volcanism after a 10-20 kyr lag → volcanism releases iron in the ocean → iron causes plankton blooms → atmospheric CO₂ goes down → ice sheets build up
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8/
Join us as we explore how this "geographic period" at the bottom of the map is actually the key to understanding where our planet has been—and where it is going.#podcast
#Antarctica
#Antarctic
#history
#climate
#ClimateChange
#GlobalWarming
#IceSheets
#icebergs
#OzoneHole -
Why delaying climate action now means higher seas by 2100 – new research
#ClimateChange #SeaLevelRise #GlobalWarming #Glaciers #Environment #Sustainability #ClimateCrisis #PublicPolicy #EarthScience #IPCC #ClimateAction #IceSheets #World #Glaciology
https://the-14.com/why-delaying-climate-action-now-means-higher-seas-by-2100-new-research/ -
The Fork in the Road
We are at a Shakespearean "tide in the affairs of men." The technology is here, the economics finally add up, and the urgency is staring us in the face. Will we choose the path of collapse, or are we smart enough to take the roadmap to a sustainable century? Watch to find out how we can turn the "catastrophic" into the "profitable."#TippingPoints
#books
#video
#YouTube
#EyesOnTheEarthArchive
#ClimateChange
#IceSheets
#glaciers
#SeaLevelRise -
RE: https://fediscience.org/@Ruth_Mottram/116250388094443741
For the morning team: We're looking for scientists excited to work at the cutting edge of Polar science with the latest high resolution climate models and Earth Observation data.
Funding support available for travel, accomodation + food costs covered#Arctic #Antarctic #Polar #ClimateScience #ClimateModelling #EarthObservation #Climate #IceSheets #SeaIce #Permafrost
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Rain is coming to Antarctica – here’s how it will change the frozen continent
#Antarctica #AntarcticPeninsula #ClimateChange #Glaciers #IceSheets #SeaIce #IceShelves #LarsenIceShelf #Penguins #Penguins #ExtremeWeather #PolarResearch #Environment
https://the-14.com/rain-is-coming-to-antarctica-heres-how-it-will-change-the-frozen-continent/ -
❄️🧊💧Changes in Northern Hemisphere ice sheets can propagate through the climate system & affect the remote region of Antarctica. Testorf et al. used idealized simulations of the past 8,000 years with a coupled climate-ice sheet model to reveal a previously unknown teleconnection that sends periodic pulses of warm water to West Antarctic ice shelves, triggering a self-amplifying retreat of the West Antarctic Ice Sheet.
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Why Greenland is indispensable to global climate science
#Greenland #Environment #Arctic #ClimateScience #SeaLevelRise #IceSheets #GlobalWarming #ClimateScience #ClimateResearch #PolarScience #EnvironmentalPolitics #ClimateRisk #ClimateChange #Trump #USA
https://the-14.com/why-greenland-is-indispensable-to-global-climate-science/ -
Three things that might trigger massive ice sheet collapse
#ClimateChange #GlobalWarming #IceSheets #Greenland #Antarctica #SeaLevelRise #Environment #ClimateCrisis #The14 #EnvironmentalJustice #PolarRegions #FloodRisk #EarthScience #ClimateAlert
https://the-14.com/three-things-that-might-trigger-massive-ice-sheet-collapse/ -
You launch your #Argo float to do one job... 2 and a half years later it pops up with with a stunning data set. It not ALL bad news ... just mostly. :(
Still ! BONUS ! brilliant engineering and deductions.
<quote>
Drifting in remote and wild seas for two-and-a-half years, the float spent about nine months beneath the massive Denman and Shackleton ice shelves. It survived to send back new data from parts of the ocean that are usually difficult to sample.
</quote>Also the paper which outlines how they reconstructed the route of the intrepid float, and methodology etal.
https://www.science.org/doi/10.1126/sciadv.adx1024
#Antarctica #IceSheets #Science #GlobalWarming #Research #Lost
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Coming back to this at #NCKF25 where my former boss (+IPCC lead author) Jens Hesselbjerg Christensen is looking at #Eemian #SeaLevelRise
Not quite as catastrophic as the MWP1a but still large. I wonder if this has been updated recently at all?
https://fediscience.org/@Ruth_Mottram/115304238980577506
Ruth_Mottram - This plot on wikipedia was made by @RARohde based on data published in late 90s and early 00s. Wondering if this has been updated or if there is new understanding on any of these palaeo records?#Palaeoclimate #SeaLevelRise #IceSheets
Maybe @DrEvanGowan has thoughts? Anyone else? -
What are climate tipping points? They sound scary, especially for ice sheets and oceans, but there’s still room for optimism
#Environment #ClimateChange #TippingPoints #Oceans #GlobalWarming #Sustainability #Nature #Forests #Corals #IceSheets #Amazon #AMOC
https://the-14.com/what-are-climate-tipping-points-they-sound-scary-especially-for-ice-sheets-and-oceans-but-theres-still-room-for-optimism/ -
This plot on wikipedia was made by @RARohde based on data published in late 90s and early 00s. Wondering if this has been updated or if there is new understanding on any of these palaeo records?
#Palaeoclimate #SeaLevelRise #IceSheets
Maybe @DrEvanGowan has thoughts? Anyone else? -
Next week our ECR group are starting a #MachineLearning sprint to speed up the development of our new #IceSheet surface mass budget emulation models.
I'm looking for hints, ideas tips and inspiration to help smooth and accelerate the process.
If you're used to working in #Sprint mode, what in your opinion makes it work or otherwise hinders it?
What can I as supervisor do to make it run better?
And how should we celebrate it's conclusion?Also, should me do an #AMA on the process?