Meghana Ranganathan
@miranganathan.bsky.social
she/her || Glaciologist/Climate Scientist || Assistant Professor at UChicago || PhD MIT/BA Swarthmore || https://icedynamics.wixsite.com/uchicago
Reposted by Meghana Ranganathan
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/...
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,...
tc.copernicus.org
October 31, 2025 at 12:55 PM
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/...
Reposted by Meghana Ranganathan
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...
www.pnas.org/doi/10.1073/...
news.oregonstate.edu/news/six-mil...
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...
www.pnas.org
October 29, 2025 at 3:19 PM
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...
www.pnas.org/doi/10.1073/...
news.oregonstate.edu/news/six-mil...
Reposted by Meghana Ranganathan
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...
October 27, 2025 at 10:20 PM
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...
Reposted by Meghana Ranganathan
🚨 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...
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...
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
www.nature.com
October 17, 2025 at 1:27 PM
🚨 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...
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...
Reposted by Meghana Ranganathan
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...
@cires.colorado.edu @cpom-uk.bsky.social #glaciology
www.cambridge.org/core/journal...
Ice shelf evolution combining flow, flexure, and fracture | Journal of Glaciology | Cambridge Core
Ice shelf evolution combining flow, flexure, and fracture
www.cambridge.org
September 24, 2025 at 11:27 PM
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...
@cires.colorado.edu @cpom-uk.bsky.social #glaciology
www.cambridge.org/core/journal...
Reposted by Meghana Ranganathan
🚨🚨 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/
Opportunities – GT Ice & Climate Group
iceclimate.eas.gatech.edu
September 8, 2025 at 4:49 PM
🚨🚨 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/
Reposted by Meghana Ranganathan
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...
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...
www.nature.com
July 21, 2025 at 3:16 PM
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
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...
cpaess.ucar.edu
July 7, 2025 at 6:02 PM
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.
Reposted by Meghana Ranganathan
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
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...
cpaess.ucar.edu
July 7, 2025 at 3:16 PM
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
Reposted by Meghana Ranganathan
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.
How do I know? Because this morning, twelve of America's rising leaders in climate science (including myself) were furloughed.
July 7, 2025 at 2:46 PM
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.
How do I know? Because this morning, twelve of America's rising leaders in climate science (including myself) were furloughed.
Reposted by Meghana Ranganathan
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!
July 2, 2025 at 3:03 PM
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!
Reposted by Meghana Ranganathan
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....
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
doi.org
July 2, 2025 at 2:30 PM
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....
Reposted by Meghana Ranganathan
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.
This is a PROPOSED budget to Congress. Call your reps.
May 31, 2025 at 3:46 AM
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.
This is a PROPOSED budget to Congress. Call your reps.
Reposted by Meghana Ranganathan
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
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
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.
wclivestream.com
May 29, 2025 at 12:08 PM
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
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
Reposted by Meghana Ranganathan
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...
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...
Live from NASA GISS, kicking-off the Weather and Climate 100-hour livestream
YouTube video by The Weather & Climate Livestream
www.youtube.com
May 28, 2025 at 11:11 PM
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...
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...
Reposted by Meghana Ranganathan
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
May 28, 2025 at 12:58 PM
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
Reposted by Meghana Ranganathan
💯 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
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
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.
wclivestream.com
May 27, 2025 at 10:51 PM
💯 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
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
Reposted by Meghana Ranganathan
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
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com
May 27, 2025 at 3:58 PM
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
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com
Reposted by Meghana Ranganathan
🧊 🚨🧊 🚨 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...
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,...
doi.org
May 27, 2025 at 1:02 PM
🧊 🚨🧊 🚨 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...
Reposted by Meghana Ranganathan
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
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.
wclivestream.com
May 26, 2025 at 4:52 PM
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
Reposted by Meghana Ranganathan
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...
www.forbes.com/sites/marsha...
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.
www.forbes.com
May 16, 2025 at 1:39 PM
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...
www.forbes.com/sites/marsha...
Reposted by Meghana Ranganathan
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!)
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.
wcstreamathon.netlify.app
May 10, 2025 at 2:43 PM
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!)
Reposted by Meghana Ranganathan
🚨🧊🚨🧊 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...
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...
doi.org
May 8, 2025 at 7:37 PM
🚨🧊🚨🧊 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...
❄️ 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/...
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:...
tc.copernicus.org
April 23, 2025 at 1:59 PM
❄️ 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/...
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/...
Reposted by Meghana Ranganathan
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...
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:...
doi.org
April 23, 2025 at 12:11 PM
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...