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Meghana Ranganathan

@miranganathan.bsky.social
659 followers 516 following 7 posts

she/her || Glaciologist/Climate Scientist || Assistant Professor at UChicago || PhD MIT/BA Swarthmore || icedynamics.wixsite.com/uchicago

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Reposted by Meghana Ranganathan
Data Science Institute @dsi-uchicago.bsky.social · 21/04/2026
Explore probabilistic inference of ice flow law using simulation-based machine learning at today’s entry in the Schmidt AI in Science Speaker Series! Featuring Emma Liu, Eric and Wendy Schmidt AI in Science Fellow at the University of Chicago
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Alex Robel @iceclimate.bsky.social · 31/03/2026
We have a new perspective piece out at Nature Geoscience taking a critical view of how we talk about ice sheet stability and where we can go from here. Check it out! rdcu.be/faUdM
rdcu.be
A new paradigm for understanding Earth’s marine ice sheets
Nature Geoscience - Grounding-line motion of the Antarctic Ice Sheet is driven by climate variability, challenging the assumption that the bed slope at the grounding line alone controls their...
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Faye Elgart @fmhe.bsky.social · 07/03/2026
happy Saturday! My first piece of academic work is out. What can tidal flexure tell us about ice in grounding zones? www.cambridge.org/core/journal...
cambridge.org
Estimating effective elasticity in grounding zones of the Ross Ice Shelf with tidal flexure from ICESat-2 | Journal of Glaciology | Cambridge Core
Estimating effective elasticity in grounding zones of the Ross Ice Shelf with tidal flexure from ICESat-2 - Volume 72
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International Glaciological Society @igsoc.bsky.social · 21/01/2026
Reminder that our 2026 IGS Global Seminar Series kicks off in less than 12 hours (20:00 GMT) with talks by the 2024 Graham Cogley Award Winners Sarah Wells-Moran & Tim Hill! More info & link to join here: www.igsoc.org/event/igs-gl...
igsoc.org
IGS Global Seminar: 2024 Graham Cogley Award Winners | January 21
Featuring Sarah Wells-Moran (MIT) and Tim Hill (Simon Fraser University). Click through for further information about the Graham Cogley Award, and the
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Reposted by Meghana Ranganathan
Erin Pettit @exploreice.bsky.social · 02/01/2026
Do you wonder what a glacier fjord sounds like underwater? Calving icebergs melting ice, melange, and more. Check out our new paper! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
The Influence of Ice Coverage, Calving, and Melt on Underwater Ambient Sound in a Glacierized Fjord
K-means clustering, a machine-learning tool, can categorize ambient sound in glacier fjords into five prototypes linked to glacier activity An 8-month acoustic data set shows glacier and ice-méla...
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Reposted by Meghana Ranganathan
Alex Robel @iceclimate.bsky.social · 12/12/2025
You: building your #AGU25 schedule 🤝 Me: providing you a GIF-ed list of #AGU25 talks from GT Cryo group members and friends for you to add to your schedule 🧵
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Adrian Luckman @adrianluckman.bsky.social · 02/12/2025
Huge fractures opening at the Thwaites Glacier Eastern Ice Shelf grounding line
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Alex Robel @iceclimate.bsky.social · 31/10/2025
A new and improved parameterization of the subgrid-scale effects of icebergs will enable realistic simulations of the future of the ocean around ice sheets. Led by postdoc Paul Summers and in collab with Rebecca Jackson, as part of the GLACIOME project! tc.copernicus.org/articles/19/...
tc.copernicus.org
Sub-grid parameterization of iceberg drag in a coupled iceberg–ocean model
Abstract. Ocean conditions in fjords play a key role in the accelerating ice mass loss of Greenland's marine-terminating glaciers. Ice mélange and icebergs have been shown to impact fjord circulation,...
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Reposted by Meghana Ranganathan
Erin Pettit @exploreice.bsky.social · 29/10/2025
Amazing COLDEX.org results - 6Million year old ice, with bubbles of old atmosphere. Thank you ice, for the stories you share about our planet and its climate. Led by Sarah Shakleton #glaciology #womeninstem #cryosphere #Antarctica www.pnas.org/doi/10.1073/... news.oregonstate.edu/news/six-mil...
pnas.org
Miocene and Pliocene ice and air from the Allan Hills blue ice area, East Antarctica | PNAS
Antarctic ice cores provide a unique archive of Earth’s atmosphere and its largest extant ice sheet. The oldest continuous ice core extends back 80...
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Reposted by Meghana Ranganathan
Alex Robel @iceclimate.bsky.social · 27/10/2025
A great explainer on @dgrau13.bsky.social’s recent paper finding simple equations describing the size of melt lakes on ice sheets doi.org/10.1038/s414...
doi.org
Predicting mean depth and area fraction of Antarctic supraglacial melt lakes with physics-based parameterizations - Nature Communications
This study uses the physics of bumpy surfaces to derive simple equations that predict the size of lakes that form from melt on the surface of ice sheets, finding that there are fundamental limits on t...
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Reposted by Meghana Ranganathan
Water and Climate - VUB @hydr-vub.bsky.social · 17/10/2025
🚨 New paper alert! Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉 Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures www.nature.com/articles/s41...
nature.com
Damage development on Antarctic ice shelves sensitive to climate warming - Nature Climate Change
Damages such as crevasses or cracks can be early indicators of ice shelf weakening. Here, the authors quantify changes in damage structures in Antarctic ice sheets, which show sensitivity to warming
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Reposted by Meghana Ranganathan
Alison Banwell @alibanwell.bsky.social · 25/09/2025
Led by Chris Bézu, with co-authors @bradlipovsky.bsky.social, Daniel Shapero & myself, our @igsoc.bsky.social pre-print presents a new open-source model that couples ice-shelf flow, flexure & fracture 🧊 🧪 @cires.colorado.edu @cpom-uk.bsky.social #glaciology www.cambridge.org/core/journal...
cambridge.org
Ice shelf evolution combining flow, flexure, and fracture | Journal of Glaciology | Cambridge Core
Ice shelf evolution combining flow, flexure, and fracture
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Alex Robel @iceclimate.bsky.social · 08/09/2025
🚨🚨 We are recruiting a PhD student to start in Fall 2026 on the NeuCIM Project funded by @heisingsimonsfdn.bsky.social. Please send this opportunity to any candidates with interests related to ice sheet modeling, projections and/or machine learning iceclimate.eas.gatech.edu/opportunities/
iceclimate.eas.gatech.edu
Opportunities – GT Ice & Climate Group
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Reposted by Meghana Ranganathan
Alex Robel @iceclimate.bsky.social · 21/07/2025
Thrilled for this paper @natcomms.nature.com led by @dgrau13.bsky.social‬, PhD Candidate @gtsciences.bsky.social, putting forward the first physics-based parameterizations for the area and depth of supraglacial lakes 🧵👇 www.nature.com/articles/s41...
nature.com
Predicting mean depth and area fraction of Antarctic supraglacial melt lakes with physics-based parameterizations - Nature Communications
This study uses the physics of bumpy surfaces to derive simple equations that predict the size of lakes that form from melt on the surface of ice sheets, finding that there are fundamental limits on t...
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Meghana Ranganathan @miranganathan.bsky.social · 07/07/2025
This fellowship was a huge part of the reason I am continuing to do climate science, and it has supported so many incredible people. These effects on early-career researchers, who do some of the most impactful work, is going to have long-lasting implications for science and scientists.
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Jessica Tierney @leafwax.bsky.social · 07/07/2025
As of today, all current NOAA Climate and Global Change postdoctoral fellows have been furloughed due to the Dept of Commerce not releasing the funding for the program. In addition no new Fellows were awarded this year. cpaess.ucar.edu/cgc
cpaess.ucar.edu
NOAA Climate & Global Change (C&GC) Postdoctoral Program | Cooperative Programs for the Advancement of Earth System ScienceNOAA Climate & Global Change (C&GC) Postdoctoral Program | Cooperative Progra...
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Lily Dove @solilyquy.bsky.social · 07/07/2025
The Secretary of Commerce's new policy requiring his personal review of all NOAA contracts over $100,000 is directly harming American science. 🧪 How do I know? Because this morning, twelve of America's rising leaders in climate science (including myself) were furloughed.
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Meghana Ranganathan @miranganathan.bsky.social · 07/07/2025
Congratulations Lily!!!!! The department is extremely lucky to have you!!
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Alex Robel @iceclimate.bsky.social · 02/07/2025
Finally: Aminat is looking for postdoctoral positions in ice sheet modeling - if you are thinking of hiring soon and looking for an experienced climate physicist and model developer, please reach out!
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Alex Robel @iceclimate.bsky.social · 02/07/2025
A nerdy science 🧵 to give you a break from the news: the first lead-authored paper by @gtsciences.bsky.social PhD candidate Aminat Ambelorun about “The Integrated Ice Sheet Response to Stochastic Calving”, now published in ‪the @igsoc.bsky.social‬ Journal of Glaciology doi.org/10.1017/jog....
doi.org
The integrated ice sheet response to stochastic iceberg calving | Journal of Glaciology | Cambridge Core
The integrated ice sheet response to stochastic iceberg calving - Volume 71
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Terry McGlynn @hormiga.bsky.social · 31/05/2025
The bottom line with the proposed cuts to NSF is to cut the number of working scientists and disappear opportunities to train new scientists. This is a PROPOSED budget to Congress. Call your reps.
screenshot from the NSF budget request to congress showing that the number of people involved in NSF activities will drop from 330,100 to 90,000.
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Paul Bierman @paul-bierman.bsky.social · 29/05/2025
Spread the word. 100 hours of non partisan climate and weather science @wclivestream.bsky.social. AT 1130 ET today, I'll be speaking about Greenland's fragile ice sheet, climate, and why US NSF supported science matters to everyone, everywhere. Watch at wclivestream.com ❄️🧪 #scicomm #UVMresearch
wclivestream.com
The Weather & Climate Livestream
Join us starting May 28th, as meteorologists and climate scientists from across the US share their research and answer your questions.
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Dr. Shaina Sadai @scienceshaina.bsky.social · 29/05/2025
The presentations & panels at the "100 Hours to Save America's Forecasts" livestream today have been truly incredible. Check it out, it will run continuously until Sunday! I'm speaking about my NSF funded PhD research 2:30 pm ET Friday. @wclivestream.bsky.social www.youtube.com/watch?v=CcWR...
youtube.com
Live from NASA GISS, kicking-off the Weather and Climate 100-hour livestream
YouTube video by The Weather & Climate Livestream
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Reposted by Meghana Ranganathan
American Meteorological Society @ametsoc.org · 28/05/2025
Federal weather & climate science is under threat. Starting TODAY at 3:00 PM ET, join a coalition of scientists--including AMS leaders--for a 100-hour livestream. Learn what federal science does for you, ask questions, and help build awareness to "Save Our Forecasts": wclivestream.com
Graphic for the Weather & Climate Livestream.
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Scripps Institution of Oceanography @scrippsocean.bsky.social · 27/05/2025
💯 Hours to Save America's Forecasts Join Scripps climate scientists & leading U.S. meteorologists for the Weather & Climate Livestream! The event celebrates the importance of science and explores the impact of the cuts on this research. 📅 May 28-June 1 wclivestream.com
wclivestream.com
The Weather & Climate Livestream
Join us starting May 28th, as meteorologists and climate scientists from across the US share their research and answer your questions.
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The Weather & Climate Livestream @wclivestream.bsky.social · 27/05/2025
Our 💯 hours to #SaveAmericasForecasts starts tomorrow! Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research! wclivestream.com
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Alex Robel @iceclimate.bsky.social · 27/05/2025
🧊 🚨🧊 🚨 New pre-print, led by postdoc Paul Summers, on how to represent the kinematic and thermodynamic influence of icebergs on the ocean in large-scale ocean models! Paving the way for fully coupled mélange-ocean models doi.org/10.5194/egus...
doi.org
Sub-grid Parameterization of Iceberg Drag in a Coupled Iceberg-Ocean Model
Abstract. Ocean conditions in fjords play a key role in the accelerating ice mass loss of Greenland's marine terminating glaciers. Ice mélange and icebergs have been shown to impact fjord circulation,...
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Reposted by Meghana Ranganathan
Erin Pettit @exploreice.bsky.social · 26/05/2025
May 28-June 1: Livestream 100 HOURS TO SAVE AMERICA'S FORECASTS. Weather and climate scientists share why forecasts are vital to all of us - from hurricanes to droughts to arctic sea ice and much more - wclivestream.com
wclivestream.com
The Weather & Climate Livestream
Join us starting May 28th, as meteorologists and climate scientists from across the US share their research and answer your questions.
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Marshall Shepherd @drshepherd2013.bsky.social · 16/05/2025
Heads up on this vital 100 hour streaming marathon on the value of weather and climate expertise as National Weather Service struggles with staff shortages and reduction in service www.forbes.com/sites/marsha...
forbes.com
100-Hour Streaming Marathon To Highlight Value Of Weather Expertise
A 100-hour streaming marathon before hurricane season seeks to raise awareness of cuts to the weather-climate enterprise and why that expertise matters to us all.
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Marc Alessi @marc-alessi.bsky.social · 10/05/2025
Calling all US meteorologists and climate scientists! Starting May 28th, we will be holding a marathon livestream to share our work with the public and show why the services we provide should not be cut. Learn more & sign up to speak here (and please share!)
wcstreamathon.netlify.app
The Weather & Climate Livestream
Join us starting May 28th, as meteorologists and climate scientists from across the US share their research and answer your questions.
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Alex Robel @iceclimate.bsky.social · 08/05/2025
🚨🧊🚨🧊 New paper led by PhD student Ziad Rashed on the oceanic drivers of Sermeq Kujalleq’s retreat since 2000 and why some models predict it will be unstoppable for decades to come (and may be wrong!) doi.org/10.5194/tc-1...
doi.org
Disentangling the oceanic drivers behind the post-2000 retreat of Sermeq Kujalleq, Greenland (Jakobshavn Isbræ)
Abstract. Ocean temperatures have warmed in the fjords surrounding the Greenland Ice Sheet, causing increased melt along their ice fronts and rapid glacier retreat and contributing to rising global se...
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Meghana Ranganathan @miranganathan.bsky.social · 23/04/2025
❄️ Excited to share this new paper on ice damage evolution 🧊 I cannot overstate the importance of the @noaa.gov C&GC Postdoctoral Fellowship in supporting this work and myself as a postdoc. These programs are so critical to developing science and scientists. tc.copernicus.org/articles/19/...
tc.copernicus.org
Glacier damage evolution over ice flow timescales
Abstract. The rate of mass loss from the Antarctic and Greenland ice sheets is controlled in large part by the processes of ice flow and ice fracture. Studies have shown these processes to be coupled:...
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Alex Robel @iceclimate.bsky.social · 23/04/2025
New paper out, led by @miranganathan.bsky.social on her postdoc work with us - an easier way to model the effects of fractures on ice sheet flow, showing that it enhances modeled ice loss by 10-30% on multi-decadal time scales doi.org/10.5194/tc-1...
doi.org
Glacier damage evolution over ice flow timescales
Abstract. The rate of mass loss from the Antarctic and Greenland ice sheets is controlled in large part by the processes of ice flow and ice fracture. Studies have shown these processes to be coupled:...
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AGU (American Geophysical Union) @agu.org · 14/04/2025
✨ Editor's Pick✨ The #Antarctic ice sheet behaves like a non-Newtonian fluid and may be more nonlinear than previously thought. This impacts its future stability and requires revisions to predictions of sea level rise. 🔗 Learn more: buff.ly/lS5TS0i #AGUPubs @eos.org
buff.ly
Nonlinear Dynamics May Lead to Faster Retreat of Antarctic Ice - Eos
The Antarctic ice sheet behaves like a non-Newtonian fluid and may be more nonlinear than previously thought. This impacts its future stability and requires revisions to predictions of sea level rise.
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Alexandra Witze @alexwitze.bsky.social · 09/04/2025
I wrote about Trump cuts at the ends of the Earth, to NSF support of science in Antarctica. 🧪 “We’re all trying to find other ways of doing our research,” says @leighstearns.bsky.social, “because they are not the stable entity.” www.nature.com/articles/d41...
nature.com
Does US science have a future in Antarctica? Trump cuts threaten to cancel fieldwork and more
Funding for the National Science Foundation, which finances research at US bases on the icy continent, has already been reduced, and the agency faces steeper cuts soon.
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Naomi Klein @naomiaklein.bsky.social · 09/04/2025
Get this: Commerce is slashing $ to Princeton's world-renowned climate research b/c modeling changes to Earth systems is "contributing to a phenomenon known as 'climate anxiety,' which has increased significantly among America’s youth." No research, no problem! www.commerce.gov/news/press-r...
commerce.gov
Ending Cooperative Agreements’ Funding to Princeton University
On Tuesday, April 8, 2025, U.S. Secretary of Commerce Howard Lutnick announced that nearly $4 million in funding is ending to Princeton University after a detailed, careful, and thorough review of the...
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Union of Concerned Scientists @ucs.org · 18/03/2025
Lead author of the report, Shaina Sadai, shares what the planet might have been like if the world—and these major polluters—had acted in a timely manner to address the harms of fossil fuels.
blog.ucs.org
How Major Carbon Producers Drive Sea Level Rise and Climate Injustice
A new UCS study attributes substantial temperature and sea level rise to emissions traced to the largest fossil fuel producers.
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Union of Concerned Scientists @ucs.org · 18/03/2025
NEW REPORT: Our latest analysis links nearly one-third of sea level rise today to emissions from 122 fossil fuel producers and cement manufacturers—and shows these emissions have guaranteed additional sea level rise for years to come.
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Meghana Ranganathan @miranganathan.bsky.social · 18/03/2025
❄️ 🧪 Very excited to boost this new paper, led by the amazing @scienceshaina.bsky.social, connecting present and future sea-level rise to industrial fossil fuel and cement producers. Check out the thread below 👇
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ACLU @aclu.org · 04/03/2025
BREAKING: We're sending an open letter to universities across the country, offering support and urging them to reject pressure to punish international students and faculty for exercising their First Amendment rights. Schools must hold firm against the Trump administration's censorship attempts.
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Helen Amanda Fricker @helen-amanda.bsky.social · 27/02/2025
Great reporting from @wired.com about what DOGE is doing to Antarctica, affecting US science and national security. This is what we will lose. We can't just leave our bases in Antarctica empty. South Pole! McMurdo! Palmer! At some point we might need a GoFundMe.
wired.com
DOGE’s Chaos Reaches Antarctica
Daily life at US-run Antarctic stations has already been disrupted. Scientists worry that the long-term impacts could upend not only important research but the continent’s delicate geopolitics.
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Leah Feiger @leahfeiger.bsky.social · 27/02/2025
New from me: DOGE is already causing chaos in Antarctica. Daily life at US-run Antarctic stations has been disrupted, and scientists don’t know if their research will be able to continue, how US stations will be sustained, or what all of this might mean for the continent’s delicate geopolitics.
wired.com
DOGE’s Chaos Reaches Antarctica
Daily life at US-run Antarctic stations has already been disrupted. Scientists worry that the long-term impacts could upend not only important research but the continent’s delicate geopolitics.
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Helen Amanda Fricker @helen-amanda.bsky.social · 25/02/2025
Why does science need government funding? What are the impacts to the US of cutting polar science? @zhonggg.bsky.social paints the picture here www.nytimes.com/2025/02/25/c...
nytimes.com
N.S.F. Cuts Raise Fears of a Reduced U.S. Presence in Polar Regions
The National Science Foundation has fired workers at the office that manages polar research, raising fears about a reduced U.S. presence in two strategic regions.
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Celeste Labedz @celestelabedz.bsky.social · 19/02/2025
Press from UChicago about some cool new cryoseismology by grad student Freya Chen! It's been cool to keep up and help out with Freya's work the past couple of years! 🧪⛏️ Open access paper here: agupubs.onlinelibrary.wiley.com/doi/10.1029/... news.uchicago.edu/story/scient...
news.uchicago.edu
Scientists track sea ice loss with earthquake sensors
UChicago study uses seismological “background noise” from worldwide monitoring network to study Arctic
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Michael Hobbes @michaelhobbes.bsky.social · 11/02/2025
I am worried this is going to become the conventional wisdom over the next four years: If those pesky college students and activists and SJWs hadn't over-reached, Trump II never would have happened. It is nonsense.
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Alex Robel @iceclimate.bsky.social · 14/02/2025
Also, as many of our federal agencies literally paint over or cover up pictures of pioneering women in science and engineering, its always worth looking back to this great piece by Julia Weertman from more than 30 years ago on "What's keeping women out of technical careers?" doi.org/10.1557/S088...
doi.org
What’s Keeping Women Out of Technical Careers? - MRS Bulletin
MRS Bulletin -
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