Meghana Ranganathan

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

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...

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...

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/...

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 🧵

Huge fractures opening at the Thwaites Glacier Eastern Ice Shelf grounding line

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,...

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/...

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...

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...

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...

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

🚨 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...

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...

🚨🚨 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/

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...

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...

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.

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

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.

Congratulations Lily!!!!! The department is extremely lucky to have you!!

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!

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....

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.

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.

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.

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

YouTube video by The Weather & Climate Livestream Live from NASA GISS, kicking-off the Weather and Climate 100-hour livestream

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...

Graphic for the Weather & Climate Livestream.

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

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.

💯 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

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

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,...

🧊 🚨🧊 🚨 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...

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.

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

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.

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...

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.

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!)

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...

🚨🧊🚨🧊 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...

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:...

❄️ 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/...