Meghana Ranganathan

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/...

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:...

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...

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.

✨ 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

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.

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...

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...

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...

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.

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.

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.

❄️ 🧪 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 👇

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.

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.

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.

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.

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.