Joe MacGregor
@joemacgregor.bsky.social
Glaciologist @ NASA/GSFC. Earth’s ice is great. Let’s keep some around. Views my own. He/him. 👨👩👧 🐶 🐶 🐈 🧊 🇬🇧 🇨🇦 🇺🇸 🇬🇱 🇦🇶
Reposted by Joe MacGregor
UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱
On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊
asiaplustj.info/en/node/354309
📽️ via @volcaholic1
On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊
asiaplustj.info/en/node/354309
📽️ via @volcaholic1
October 28, 2025 at 4:10 PM
UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱
On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊
asiaplustj.info/en/node/354309
📽️ via @volcaholic1
On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊
asiaplustj.info/en/node/354309
📽️ via @volcaholic1
Reposted by Joe MacGregor
NEW: Extraordinary footage has emerged of the huge tsunami that hit Russia’s remote Kamchatka peninsula after the 8.8 magnitude earthquake on July 30th.
(🎥 Doni Nikz)
(🎥 Doni Nikz)
August 3, 2025 at 10:43 PM
NEW: Extraordinary footage has emerged of the huge tsunami that hit Russia’s remote Kamchatka peninsula after the 8.8 magnitude earthquake on July 30th.
(🎥 Doni Nikz)
(🎥 Doni Nikz)
Reposted by Joe MacGregor
🚨 Our new preprint!
*Cascading mass loss of Antarctic ice shelves triggered by iceberg collisions*
🔗 doi.org/10.22541/essoar.175285257.77669558/v1
In 2021, giant icebergs hit Dronning Maud Land ice shelves in #Antarctica, causing a chain reaction of calving & major regional ice-shelf area loss. 💥
*Cascading mass loss of Antarctic ice shelves triggered by iceberg collisions*
🔗 doi.org/10.22541/essoar.175285257.77669558/v1
In 2021, giant icebergs hit Dronning Maud Land ice shelves in #Antarctica, causing a chain reaction of calving & major regional ice-shelf area loss. 💥
Cascading mass loss of Antarctic ice shelves triggered by iceberg collisions
Iceberg calving accounts for about half of Antarctic ice-shelf mass loss. We used satellite imagery to analyze annual ice-shelf front changes and major calving events over eight years from austral sum...
doi.org
July 21, 2025 at 7:20 AM
🚨 Our new preprint!
*Cascading mass loss of Antarctic ice shelves triggered by iceberg collisions*
🔗 doi.org/10.22541/essoar.175285257.77669558/v1
In 2021, giant icebergs hit Dronning Maud Land ice shelves in #Antarctica, causing a chain reaction of calving & major regional ice-shelf area loss. 💥
*Cascading mass loss of Antarctic ice shelves triggered by iceberg collisions*
🔗 doi.org/10.22541/essoar.175285257.77669558/v1
In 2021, giant icebergs hit Dronning Maud Land ice shelves in #Antarctica, causing a chain reaction of calving & major regional ice-shelf area loss. 💥
Reposted by Joe MacGregor
Sentinel-2 reveals the surface deformation after the 2025 #Myanmar #earthquake www.cesbio.cnrs.fr/multitemp/se...
April 2, 2025 at 9:04 PM
Sentinel-2 reveals the surface deformation after the 2025 #Myanmar #earthquake www.cesbio.cnrs.fr/multitemp/se...
Reposted by Joe MacGregor
Please share with teens or anyone you know who work with teens! #girlsinstem #glaciology #sciart #womeninstem #science this program is for teens willing to challenge themselves (**not** for just top performing students - we are open, no need to be a science or art geek either, just willing to try)
Inspiring Girls* Expeditions hosts tuition-FREE, multi-day expeditions for high school girls* that blend science, art, and backcountry travel. It’s not too late – apply for our summer 2025 expeditions today! Start your application at inspiringirls.org/apply.
January 13, 2025 at 8:37 PM
Please share with teens or anyone you know who work with teens! #girlsinstem #glaciology #sciart #womeninstem #science this program is for teens willing to challenge themselves (**not** for just top performing students - we are open, no need to be a science or art geek either, just willing to try)
Reposted by Joe MacGregor
A new gigantic outburst flood from Catalina lake in East Greenland [Catalinadal, Renland, Scoresbysund].
total volume: 3.4 km3
peak discharge: ~7200 m3/s
top-10 #GLOF in terms of both numbers.
previous outburst 2013
I'm sending out a press release today about it.
🧪❄️ 🥼❄️
1/x
total volume: 3.4 km3
peak discharge: ~7200 m3/s
top-10 #GLOF in terms of both numbers.
previous outburst 2013
I'm sending out a press release today about it.
🧪❄️ 🥼❄️
1/x
December 12, 2024 at 12:09 PM
A new gigantic outburst flood from Catalina lake in East Greenland [Catalinadal, Renland, Scoresbysund].
total volume: 3.4 km3
peak discharge: ~7200 m3/s
top-10 #GLOF in terms of both numbers.
previous outburst 2013
I'm sending out a press release today about it.
🧪❄️ 🥼❄️
1/x
total volume: 3.4 km3
peak discharge: ~7200 m3/s
top-10 #GLOF in terms of both numbers.
previous outburst 2013
I'm sending out a press release today about it.
🧪❄️ 🥼❄️
1/x
The Snow4Flow concept paper is out! See notice in cryolist from Thursday. This will form the basis for the later AO. Stickers at #AGU24. snow4flow.lpl.arizona.edu/concept-paper
December 9, 2024 at 12:57 AM
The Snow4Flow concept paper is out! See notice in cryolist from Thursday. This will form the basis for the later AO. Stickers at #AGU24. snow4flow.lpl.arizona.edu/concept-paper
Reposted by Joe MacGregor
In work I’ve been quietly doing, many dozens of people’s stories & early writing drafts, one thing’s increasingly clear.
“Safety by Exclusion”—the dominant paradigm in polar science & most geosci sub-fields—isn’t just harmful, it’s ineffective. It DOESN’T WORK! Makes everyone less safe, in fact. 🧪⚒️
“Safety by Exclusion”—the dominant paradigm in polar science & most geosci sub-fields—isn’t just harmful, it’s ineffective. It DOESN’T WORK! Makes everyone less safe, in fact. 🧪⚒️
November 30, 2024 at 4:26 PM
In work I’ve been quietly doing, many dozens of people’s stories & early writing drafts, one thing’s increasingly clear.
“Safety by Exclusion”—the dominant paradigm in polar science & most geosci sub-fields—isn’t just harmful, it’s ineffective. It DOESN’T WORK! Makes everyone less safe, in fact. 🧪⚒️
“Safety by Exclusion”—the dominant paradigm in polar science & most geosci sub-fields—isn’t just harmful, it’s ineffective. It DOESN’T WORK! Makes everyone less safe, in fact. 🧪⚒️
Reposted by Joe MacGregor
🧪 Well-meaning arguments to “keep science apolitical” just cede the far-right-wing propaganda framing that science…
• “used to be apolitical”,
• “recently became politicized”, and ∴
• “needs to be fixed.”
Which is 100% bullshit on every single point.
Don’t do their propaganda for them.
• “used to be apolitical”,
• “recently became politicized”, and ∴
• “needs to be fixed.”
Which is 100% bullshit on every single point.
Don’t do their propaganda for them.
November 16, 2024 at 5:16 PM
🧪 Well-meaning arguments to “keep science apolitical” just cede the far-right-wing propaganda framing that science…
• “used to be apolitical”,
• “recently became politicized”, and ∴
• “needs to be fixed.”
Which is 100% bullshit on every single point.
Don’t do their propaganda for them.
• “used to be apolitical”,
• “recently became politicized”, and ∴
• “needs to be fixed.”
Which is 100% bullshit on every single point.
Don’t do their propaganda for them.
Reposted by Joe MacGregor
Listen to a new episode with @joemacgregor.bsky.social on mapping Greenland's geology below the ice. An impressive story of synthesizing decades of geophysical seismic, gravity, and magnetic surveys together with radar and laser altimetry. Newly discovered: long valley networks, 3 new provinces.
November 14, 2024 at 1:38 PM
Listen to a new episode with @joemacgregor.bsky.social on mapping Greenland's geology below the ice. An impressive story of synthesizing decades of geophysical seismic, gravity, and magnetic surveys together with radar and laser altimetry. Newly discovered: long valley networks, 3 new provinces.
Lots of new people here so a reintroduction: Glaciologist & geophysicist. Big fan of ice, especially the grounded form, at both poles. Keen on radar sounding, airborne & satellite remote sensing, & developing better boundary conditions for ice flow models. Sometimes I meme, other times I exercise.
November 14, 2024 at 2:15 AM
Lots of new people here so a reintroduction: Glaciologist & geophysicist. Big fan of ice, especially the grounded form, at both poles. Keen on radar sounding, airborne & satellite remote sensing, & developing better boundary conditions for ice flow models. Sometimes I meme, other times I exercise.
Reposted by Joe MacGregor
Hi newskies - if you're interested in climate risk, and you don't follow @scrawford.bsky.social, you should probably fix that.
A Matter of Gravity: South Florida's canals can't take it any more. Looking for another story about climate risk in Florida? Look no further. Post today: susanpcrawford.substack.com/p/a-matter-o...
A Matter of Gravity: South Florida's canals can't take it any more
A story of explosive growth, unthinkable expense, and missed signals
susanpcrawford.substack.com
November 7, 2024 at 12:27 AM
Hi newskies - if you're interested in climate risk, and you don't follow @scrawford.bsky.social, you should probably fix that.
Reposted by Joe MacGregor
The first circular for the IGS Symposium on Ice Streams and Outlet Glaciers is out now! ❄️ We have some fantastic invited speakers lined up and are looking forward to welcoming you to Durham in July 2025. Check out the circular and register your interest here: www.igsoc.org/event/ice-st... ⚒️🧪
November 5, 2024 at 2:42 PM
The first circular for the IGS Symposium on Ice Streams and Outlet Glaciers is out now! ❄️ We have some fantastic invited speakers lined up and are looking forward to welcoming you to Durham in July 2025. Check out the circular and register your interest here: www.igsoc.org/event/ice-st... ⚒️🧪
Reposted by Joe MacGregor
Carbon capture and storage is designed to capture government subsidies, not carbon.
This is absolute madness. Carbon capture and storage has failed time and again. Labour has slashed reliable green programmes, to pour vast sums of our money into a complete crock. The only possible explanation is lobbying by fossil fuel companies.🧵 www.theguardian.com/environment/...
Labour to commit almost £22bn to fund carbon capture and storage projects
Investment will fund two CCS clusters – but environmental campaigners have criticised plans
www.theguardian.com
October 4, 2024 at 9:13 AM
Carbon capture and storage is designed to capture government subsidies, not carbon.
Reposted by Joe MacGregor
Field scientists and those that approve expenses like wilderness first aid and crevasse rescue courses, READ THIS from @snowhydro.bsky.social: www.nature.com/articles/d41...
From crevasse falls to polar bears, train fieldwork leaders for emergencies
Fieldwork can be deadly: heads of expeditions must be taught how to cope in a crisis.
www.nature.com
October 2, 2024 at 7:57 PM
Field scientists and those that approve expenses like wilderness first aid and crevasse rescue courses, READ THIS from @snowhydro.bsky.social: www.nature.com/articles/d41...
Reposted by Joe MacGregor
Paleoclimate constraints on the future of El Niño: congrats to @carbon8.bsky.social and all the coauthors www.nature.com/articles/s41...
Future increase in extreme El Niño supported by past glacial changes - Nature
A combination of palaeoclimate proxies and simulations shows that a common mechanism controls El Niño variation in cold and warm states, which supports expectations of more extreme El Niño occurr...
www.nature.com
September 25, 2024 at 3:24 PM
Paleoclimate constraints on the future of El Niño: congrats to @carbon8.bsky.social and all the coauthors www.nature.com/articles/s41...
I highly recommend @scrawford.bsky.social's newsletter, which I think @kellyhereid.bsky.social clued me in to. Always informative and insightful into ongoing adaptation strategies and challenges associated with sea-level rise.
Watch NJ put climate risk squarely on the table - post today: open.substack.com/pub/susanpcr...
New Jersey is updating its land use requirements to incorporate climate risks
Big changes ahead for investors, developers, homeowners, and municipalities
open.substack.com
September 23, 2024 at 1:07 PM
I highly recommend @scrawford.bsky.social's newsletter, which I think @kellyhereid.bsky.social clued me in to. Always informative and insightful into ongoing adaptation strategies and challenges associated with sea-level rise.
Reposted by Joe MacGregor
Check out a new multi-agency effort on sea level rise for the US. Updated observations and projections including vertical land motion impacts.
sealevel.globalchange.gov
sealevel.globalchange.gov
Home – U.S. Sea Level Change
Access federally-supported data visualizations and resources on regional sea level changes and sea level rise in the U.S.
sealevel.globalchange.gov
September 19, 2024 at 7:36 PM
Check out a new multi-agency effort on sea level rise for the US. Updated observations and projections including vertical land motion impacts.
sealevel.globalchange.gov
sealevel.globalchange.gov
Reposted by Joe MacGregor
Reposted by Joe MacGregor
Scientific American gave a brief intro of our new map of Greenland’s subglacial geology — “Complex, Hidden Landscape Mapped a Mile under Greenland Ice” — led by @joemacgregor.bsky.social
www.scientificamerican.com/article/comp...
www.scientificamerican.com/article/comp...
Complex, Hidden Landscape Mapped a Mile under Greenland Ice
A new Greenland map suggests how geology might shift and twist below the ice
www.scientificamerican.com
August 23, 2024 at 7:25 PM
Scientific American gave a brief intro of our new map of Greenland’s subglacial geology — “Complex, Hidden Landscape Mapped a Mile under Greenland Ice” — led by @joemacgregor.bsky.social
www.scientificamerican.com/article/comp...
www.scientificamerican.com/article/comp...
Reposted by Joe MacGregor
Greenland was warm enough, for long enough, for an entire tundra ecosystem where today ice is two miles deep, during an interglacial within the last million years 🧪⚒️❄️ phys.org/news/2024-08...
Greenland fossil discovery stuns scientists and confirms that center of ice sheet melted in recent past
The story of Greenland keeps getting greener—and scarier. A new study provides the first direct evidence that the center—not just the edges—of Greenland's ice sheet melted away in the recent geologica...
phys.org
August 8, 2024 at 4:11 PM
Greenland was warm enough, for long enough, for an entire tundra ecosystem where today ice is two miles deep, during an interglacial within the last million years 🧪⚒️❄️ phys.org/news/2024-08...
Reposted by Joe MacGregor
Oh hey, this is finally public!
I've been working for a bit with the GMAO folks at NASA GSFC to leverage the near-real-time capabilities of GEOS-FP in combination with the robustness + length of record of the MERRA-2 reanalysis.
Last week was hella hot, y'all!
www.nasa.gov/earth/nasa-d... 🧪⚒️
I've been working for a bit with the GMAO folks at NASA GSFC to leverage the near-real-time capabilities of GEOS-FP in combination with the robustness + length of record of the MERRA-2 reanalysis.
Last week was hella hot, y'all!
www.nasa.gov/earth/nasa-d... 🧪⚒️
July 29, 2024 at 4:31 PM
Oh hey, this is finally public!
I've been working for a bit with the GMAO folks at NASA GSFC to leverage the near-real-time capabilities of GEOS-FP in combination with the robustness + length of record of the MERRA-2 reanalysis.
Last week was hella hot, y'all!
www.nasa.gov/earth/nasa-d... 🧪⚒️
I've been working for a bit with the GMAO folks at NASA GSFC to leverage the near-real-time capabilities of GEOS-FP in combination with the robustness + length of record of the MERRA-2 reanalysis.
Last week was hella hot, y'all!
www.nasa.gov/earth/nasa-d... 🧪⚒️
Reposted by Joe MacGregor
Hey All! We're looking for a glaciology PhD student at DTU-Space to model the ice flow of the Greenland ice sheet over the past 12,000 years. 👇
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
The CISP team is fun and growing! This call closes 16 August 2024.
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
The CISP team is fun and growing! This call closes 16 August 2024.
July 28, 2024 at 2:46 PM
Hey All! We're looking for a glaciology PhD student at DTU-Space to model the ice flow of the Greenland ice sheet over the past 12,000 years. 👇
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
The CISP team is fun and growing! This call closes 16 August 2024.
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
The CISP team is fun and growing! This call closes 16 August 2024.