Denis Lombardi
@denisantarctica.bsky.social
Geophysicist - Seismologist
Mountains, glaciers, antarctica and other cryosphere environments
Monitoring natural hazards as independent scientist
Mountains, glaciers, antarctica and other cryosphere environments
Monitoring natural hazards as independent scientist
Reposted by Denis Lombardi
An excellent visualization of the subduction zone up here and the location of the earthquake. Thank you for sharing @judithgeology.bsky.social!
🧪⚒️
#earthquake
#alaska
🧪⚒️
#earthquake
#alaska
⚒️ 🧪
This morning, a M6 earthquake struck at ~70 km depth near Anchorage, Alaska.
Earthquakes are a regular part of life here: this is a subduction zone, with earthquakes deepening east to west. M6 earthquakes fall well within the range of "normal".
USGS page: earthquake.usgs.gov/earthquakes/...
This morning, a M6 earthquake struck at ~70 km depth near Anchorage, Alaska.
Earthquakes are a regular part of life here: this is a subduction zone, with earthquakes deepening east to west. M6 earthquakes fall well within the range of "normal".
USGS page: earthquake.usgs.gov/earthquakes/...
November 28, 2025 at 1:34 AM
An excellent visualization of the subduction zone up here and the location of the earthquake. Thank you for sharing @judithgeology.bsky.social!
🧪⚒️
#earthquake
#alaska
🧪⚒️
#earthquake
#alaska
Reposted by Denis Lombardi
Agonising Ossoue Glacier from Pico central (3235 m) on 6th Sept.! 🧊🔥
Not a single snow patch, only bare ice 😱
🎥 @puertatras
Not a single snow patch, only bare ice 😱
🎥 @puertatras
September 8, 2025 at 8:49 PM
Agonising Ossoue Glacier from Pico central (3235 m) on 6th Sept.! 🧊🔥
Not a single snow patch, only bare ice 😱
🎥 @puertatras
Not a single snow patch, only bare ice 😱
🎥 @puertatras
Reposted by Denis Lombardi
[Research] 🇦🇶 East Antarctica's interior acts as an early warning system for ice loss! New 30-year study shows Indian Ocean warming causes rapid Antarctic interior warming at 0.45-0.72°C/decade. Published in @natcomms.nature.com. bit.ly/4m594AQ 🧪 doi.org/p45t
Why the East Antarctic interior is warming faster and earlier than its coastal areas
First long-term study on the East Antarctic interior ice sheet region reveals the Indian Ocean mechanism driving this ch...
bit.ly
September 8, 2025 at 6:00 AM
[Research] 🇦🇶 East Antarctica's interior acts as an early warning system for ice loss! New 30-year study shows Indian Ocean warming causes rapid Antarctic interior warming at 0.45-0.72°C/decade. Published in @natcomms.nature.com. bit.ly/4m594AQ 🧪 doi.org/p45t
Reposted by Denis Lombardi
A reminder that submissions are now open for the @igsoc.bsky.social special collection of the Annals of Glaciology on ‘Ice Streams and Outlet Glaciers’. Accepted papers will be published continuously and will be brought together in an online thematic collection in 2026: www.igsoc.org/ice-streams-...
Ice Streams and Outlet Glaciers - call for papers | IGS
The International Glaciological Society (IGS) will prepare a special collection of the Annals of Glaciology with the theme ‘Ice Streams and Outlet
www.igsoc.org
September 8, 2025 at 8:22 AM
A reminder that submissions are now open for the @igsoc.bsky.social special collection of the Annals of Glaciology on ‘Ice Streams and Outlet Glaciers’. Accepted papers will be published continuously and will be brought together in an online thematic collection in 2026: www.igsoc.org/ice-streams-...
Reposted by Denis Lombardi
It has been a busy couple of days! There was a large landslide and tsunami in SE Alaska, in Tracy Arm, Sunday morning. Luckily, no injuries or casualties were reported. This region is outside of our current landslide coverage, but we were able to get a quick location after hearing about the event. 🧵
August 13, 2025 at 2:29 AM
It has been a busy couple of days! There was a large landslide and tsunami in SE Alaska, in Tracy Arm, Sunday morning. Luckily, no injuries or casualties were reported. This region is outside of our current landslide coverage, but we were able to get a quick location after hearing about the event. 🧵
Reposted by Denis Lombardi
Collapse of the lower part of Bossons Glacier! 😭
Incredibly fast... with brutal heatwaves now occurring several times a summer! 🥵
Via @valerie-paumier.bsky.social
Incredibly fast... with brutal heatwaves now occurring several times a summer! 🥵
Via @valerie-paumier.bsky.social
August 11, 2025 at 2:33 PM
Collapse of the lower part of Bossons Glacier! 😭
Incredibly fast... with brutal heatwaves now occurring several times a summer! 🥵
Via @valerie-paumier.bsky.social
Incredibly fast... with brutal heatwaves now occurring several times a summer! 🥵
Via @valerie-paumier.bsky.social
Reposted by Denis Lombardi
35.1°C at 1410 m asl! 😲🥵
ABSOLUTE RECORD AT GAVARNIE - SET YESTERDAY! - DESTROYED BY +1°C!!! 😱
THIS IS NO MORE CLIMATOLOGY
THIS IS DAILY MORBID NIGHTMARE!
The worst part is that it will probably be broken again in the coming days...
Via @meteopyrenees.bsky.social
ABSOLUTE RECORD AT GAVARNIE - SET YESTERDAY! - DESTROYED BY +1°C!!! 😱
THIS IS NO MORE CLIMATOLOGY
THIS IS DAILY MORBID NIGHTMARE!
The worst part is that it will probably be broken again in the coming days...
Via @meteopyrenees.bsky.social
August 11, 2025 at 2:03 PM
35.1°C at 1410 m asl! 😲🥵
ABSOLUTE RECORD AT GAVARNIE - SET YESTERDAY! - DESTROYED BY +1°C!!! 😱
THIS IS NO MORE CLIMATOLOGY
THIS IS DAILY MORBID NIGHTMARE!
The worst part is that it will probably be broken again in the coming days...
Via @meteopyrenees.bsky.social
ABSOLUTE RECORD AT GAVARNIE - SET YESTERDAY! - DESTROYED BY +1°C!!! 😱
THIS IS NO MORE CLIMATOLOGY
THIS IS DAILY MORBID NIGHTMARE!
The worst part is that it will probably be broken again in the coming days...
Via @meteopyrenees.bsky.social
Reposted by Denis Lombardi
Le Sud de la France subit une #canicule record par sa sévérité(combinaison intensité+durée) & brutalité.
✔quels processus à son origine?
✔pourquoi cet été restera l’un des +frais de ce siècle si on n’accélère pas la décarbonation restant dans l'illusion d'une adaptation sans casse?
#fatigue
Un fil🧵👇
✔quels processus à son origine?
✔pourquoi cet été restera l’un des +frais de ce siècle si on n’accélère pas la décarbonation restant dans l'illusion d'une adaptation sans casse?
#fatigue
Un fil🧵👇
August 12, 2025 at 11:46 AM
Reposted by Denis Lombardi
Vignemale and Ossoue Glacier 🥰
‘Only’ early August and ice is exposed over much of the glacier => low albedo 🥵
And guess what?
Another heatwave is on the way over SW France with 40°C forecasted => very heavy melting in the coming days! 🔥 🧊 💧
📷 Pierre René on 1st Aug. 2025
Via Etienne Berthier
‘Only’ early August and ice is exposed over much of the glacier => low albedo 🥵
And guess what?
Another heatwave is on the way over SW France with 40°C forecasted => very heavy melting in the coming days! 🔥 🧊 💧
📷 Pierre René on 1st Aug. 2025
Via Etienne Berthier
August 6, 2025 at 6:01 PM
Vignemale and Ossoue Glacier 🥰
‘Only’ early August and ice is exposed over much of the glacier => low albedo 🥵
And guess what?
Another heatwave is on the way over SW France with 40°C forecasted => very heavy melting in the coming days! 🔥 🧊 💧
📷 Pierre René on 1st Aug. 2025
Via Etienne Berthier
‘Only’ early August and ice is exposed over much of the glacier => low albedo 🥵
And guess what?
Another heatwave is on the way over SW France with 40°C forecasted => very heavy melting in the coming days! 🔥 🧊 💧
📷 Pierre René on 1st Aug. 2025
Via Etienne Berthier
Reposted by Denis Lombardi
Great article with comments by @diegosismologo.bsky.social, @acarrerac.bsky.social, @seismo-steve.bsky.social and @judithgeology.bsky.social. Though the tsunamis weren't as massive as past events, people evacuated because of timely warnings and accurate forecasting of when/where waves would arrive.
Another earthquake story from @sciam.bsky.social by the always-excellent @squigglyvolcano.bsky.social explaining why the tsunami from the Russia quake wasn't as huge as the one from the 2011 Japan quake, for example. 🧪
Why the Russia Earthquake Didn't Cause a Huge Tsunami
Russia's magnitude-8.8 earthquake spawned serious tsunami warnings, but waves have been moderate so far. Here's the geological reason why
www.scientificamerican.com
July 30, 2025 at 5:22 PM
Great article with comments by @diegosismologo.bsky.social, @acarrerac.bsky.social, @seismo-steve.bsky.social and @judithgeology.bsky.social. Though the tsunamis weren't as massive as past events, people evacuated because of timely warnings and accurate forecasting of when/where waves would arrive.
Reposted by Denis Lombardi
Want to learn more about earthquakes like today's M8.7? Get your info straight from the experts with this spectacular list of seismologists!
Assembled by the awesome @geohenning.bsky.social: go.bsky.app/ND4oS9k
Assembled by the awesome @geohenning.bsky.social: go.bsky.app/ND4oS9k
July 30, 2025 at 1:50 AM
Want to learn more about earthquakes like today's M8.7? Get your info straight from the experts with this spectacular list of seismologists!
Assembled by the awesome @geohenning.bsky.social: go.bsky.app/ND4oS9k
Assembled by the awesome @geohenning.bsky.social: go.bsky.app/ND4oS9k
Reposted by Denis Lombardi
Climate scientist Dr @michelle-maclennan.bsky.social from @bas.ac.uk explains how scientists measure ice changes across #Antarctica. What does "mass balance" actually mean? What are atmospheric rivers, and what part do they play in extreme events?
www.bas.ac.uk/blogpost/how...
www.bas.ac.uk/blogpost/how...
How do we actually know Antarctica is melting? Mass balance explained - British Antarctic Survey
When news broke that Antarctica had gained ice mass between 2021 and 2023, it sparked debate across comment sections worldwide. How could the continent be gaining ice when we’re constantly …
www.bas.ac.uk
July 30, 2025 at 7:31 PM
Climate scientist Dr @michelle-maclennan.bsky.social from @bas.ac.uk explains how scientists measure ice changes across #Antarctica. What does "mass balance" actually mean? What are atmospheric rivers, and what part do they play in extreme events?
www.bas.ac.uk/blogpost/how...
www.bas.ac.uk/blogpost/how...
Reposted by Denis Lombardi
⚒️ 🧪
What do we know about the M8.8 earthquake that struck offshore Russia yesterday? We explore patterns in the foreshocks and aftershocks, compare the USGS seismic catalog with a local seismic database, and compare the event to the great 1952 earthquake.
What do we know about the M8.8 earthquake that struck offshore Russia yesterday? We explore patterns in the foreshocks and aftershocks, compare the USGS seismic catalog with a local seismic database, and compare the event to the great 1952 earthquake.
A first look at the Mw8.8 Kamchatka earthquake
Contextualizing our most recent great earthquake
earthquakeinsights.substack.com
July 30, 2025 at 7:37 PM
⚒️ 🧪
What do we know about the M8.8 earthquake that struck offshore Russia yesterday? We explore patterns in the foreshocks and aftershocks, compare the USGS seismic catalog with a local seismic database, and compare the event to the great 1952 earthquake.
What do we know about the M8.8 earthquake that struck offshore Russia yesterday? We explore patterns in the foreshocks and aftershocks, compare the USGS seismic catalog with a local seismic database, and compare the event to the great 1952 earthquake.
Reposted by Denis Lombardi
Stunning view of the landslide that occurred yesterday evening at Les Rochers du Génépy (2850 m, Pralognan) shot today from Aiguille de la Vanoise! 😲
Glaciers de la Réchasse (L) and Arcelin (center and R) at background 🧊
📷 Bertrand Brun
Glaciers de la Réchasse (L) and Arcelin (center and R) at background 🧊
📷 Bertrand Brun
July 29, 2025 at 7:31 PM
Stunning view of the landslide that occurred yesterday evening at Les Rochers du Génépy (2850 m, Pralognan) shot today from Aiguille de la Vanoise! 😲
Glaciers de la Réchasse (L) and Arcelin (center and R) at background 🧊
📷 Bertrand Brun
Glaciers de la Réchasse (L) and Arcelin (center and R) at background 🧊
📷 Bertrand Brun
Reposted by Denis Lombardi
Ossoue Glacier from Col des Gentianes (Vignemale, Pyrénées)
2000 | 2015 | 2023
Only 23 years shown here... ⏳
Will be entirely gone in less than 9 years! 🔥
- Mean glacier thickness: 15.1 m
- Mean thickness loss/yr: 2 m (2002-2024) but 4.5 m in 2022 and 2023! 😱
📷 © Pierre René-Association Moraine
2000 | 2015 | 2023
Only 23 years shown here... ⏳
Will be entirely gone in less than 9 years! 🔥
- Mean glacier thickness: 15.1 m
- Mean thickness loss/yr: 2 m (2002-2024) but 4.5 m in 2022 and 2023! 😱
📷 © Pierre René-Association Moraine
July 10, 2025 at 3:52 PM
Ossoue Glacier from Col des Gentianes (Vignemale, Pyrénées)
2000 | 2015 | 2023
Only 23 years shown here... ⏳
Will be entirely gone in less than 9 years! 🔥
- Mean glacier thickness: 15.1 m
- Mean thickness loss/yr: 2 m (2002-2024) but 4.5 m in 2022 and 2023! 😱
📷 © Pierre René-Association Moraine
2000 | 2015 | 2023
Only 23 years shown here... ⏳
Will be entirely gone in less than 9 years! 🔥
- Mean glacier thickness: 15.1 m
- Mean thickness loss/yr: 2 m (2002-2024) but 4.5 m in 2022 and 2023! 😱
📷 © Pierre René-Association Moraine
Reposted by Denis Lombardi
I’m delighted to share that our new paper is now out in @natclimate.nature.com! Our long-term, monthly Antarctic-wide dataset of surface meltwater shows that the East Antarctic Ice Sheet is becoming increasingly prone to surface meltwater ponding.
Continent-wide mapping shows increasing sensitivity of East Antarctica to meltwater ponding - Nature Climate Change
This study provides a continent-wide assessment of surface meltwater area in Antarctica between 2006 and 2021, highlighting recent increases in magnitude and variability in East Antarctica, with indic...
www.nature.com
July 4, 2025 at 11:13 AM
I’m delighted to share that our new paper is now out in @natclimate.nature.com! Our long-term, monthly Antarctic-wide dataset of surface meltwater shows that the East Antarctic Ice Sheet is becoming increasingly prone to surface meltwater ponding.
Reposted by Denis Lombardi
Bossons Glacier
2022 | 2025
No comment needed... 😭
📷 Baptiste Locatelli
2022 | 2025
No comment needed... 😭
📷 Baptiste Locatelli
July 3, 2025 at 9:36 PM
Bossons Glacier
2022 | 2025
No comment needed... 😭
📷 Baptiste Locatelli
2022 | 2025
No comment needed... 😭
📷 Baptiste Locatelli
In the Mont Blanc Massif (Grandes Jorasses), an *open-access* paper shows an increased seismicity in the recent years, mostly triggered by meltwater.
The "cryosphere retreat driven by climate change can increase alpine seismic hazards".
link to the paper: www.sciencedirect.com/science/arti...
The "cryosphere retreat driven by climate change can increase alpine seismic hazards".
link to the paper: www.sciencedirect.com/science/arti...
July 3, 2025 at 1:26 PM
In the Mont Blanc Massif (Grandes Jorasses), an *open-access* paper shows an increased seismicity in the recent years, mostly triggered by meltwater.
The "cryosphere retreat driven by climate change can increase alpine seismic hazards".
link to the paper: www.sciencedirect.com/science/arti...
The "cryosphere retreat driven by climate change can increase alpine seismic hazards".
link to the paper: www.sciencedirect.com/science/arti...
Reposted by Denis Lombardi
When a recognized glaciologist says 'it's hard to accept these numbers...'
Well, you should be terrified!
1 m ice thickness lost... in 10 days! 😱😱😱
Well, you should be terrified!
1 m ice thickness lost... in 10 days! 😱😱😱
The tongue of Rhone #Glacier ten days after my last visit. Can you guess how much ice melted away? 1️⃣ meter in terms of thickness! 1️⃣0️⃣ days... And that's just the beginning of the summer season.
We know the times are bad for the ice, but still it is hard to accept these numbers!
We know the times are bad for the ice, but still it is hard to accept these numbers!
June 24, 2025 at 8:20 PM
When a recognized glaciologist says 'it's hard to accept these numbers...'
Well, you should be terrified!
1 m ice thickness lost... in 10 days! 😱😱😱
Well, you should be terrified!
1 m ice thickness lost... in 10 days! 😱😱😱
Reposted by Denis Lombardi
Last Wednesday the Birchgletscher in the Swiss Alps collapsed, devastating large parts of the village #Blatten and blocking the Lonza river which created a small lake.
Thanks to aerial images shared by #swisstopo, I was able to create a 3D model of the area.
You can explore it here 👉 skfb.ly/pxHLC
Thanks to aerial images shared by #swisstopo, I was able to create a 3D model of the area.
You can explore it here 👉 skfb.ly/pxHLC
May 31, 2025 at 8:05 PM
Last Wednesday the Birchgletscher in the Swiss Alps collapsed, devastating large parts of the village #Blatten and blocking the Lonza river which created a small lake.
Thanks to aerial images shared by #swisstopo, I was able to create a 3D model of the area.
You can explore it here 👉 skfb.ly/pxHLC
Thanks to aerial images shared by #swisstopo, I was able to create a 3D model of the area.
You can explore it here 👉 skfb.ly/pxHLC
Reposted by Denis Lombardi
From the Alps to Tien Shan, same story for the glaciers this year, on track for record losses! 🔥🥵
Little winter snow and already crazy heat!
32°C at 1100 m in Chamonix
16°C at 3600 m in Tien Shan
Real time mass balance 👇
Swiss Alps @vaw-glaciology.bsky.social
Bordu Gl. @landervt.bsky.social
Little winter snow and already crazy heat!
32°C at 1100 m in Chamonix
16°C at 3600 m in Tien Shan
Real time mass balance 👇
Swiss Alps @vaw-glaciology.bsky.social
Bordu Gl. @landervt.bsky.social
June 13, 2025 at 1:31 PM
From the Alps to Tien Shan, same story for the glaciers this year, on track for record losses! 🔥🥵
Little winter snow and already crazy heat!
32°C at 1100 m in Chamonix
16°C at 3600 m in Tien Shan
Real time mass balance 👇
Swiss Alps @vaw-glaciology.bsky.social
Bordu Gl. @landervt.bsky.social
Little winter snow and already crazy heat!
32°C at 1100 m in Chamonix
16°C at 3600 m in Tien Shan
Real time mass balance 👇
Swiss Alps @vaw-glaciology.bsky.social
Bordu Gl. @landervt.bsky.social
Reposted by Denis Lombardi
Bossons Glacier tongue collapse! 😱
One year apart...! ⌚
📷
17th June 2025 (@alarcos.bsky.social)
29th June 2024 (Sandra Belin-Gorsic)
One year apart...! ⌚
📷
17th June 2025 (@alarcos.bsky.social)
29th June 2024 (Sandra Belin-Gorsic)
June 17, 2025 at 5:11 PM
Bossons Glacier tongue collapse! 😱
One year apart...! ⌚
📷
17th June 2025 (@alarcos.bsky.social)
29th June 2024 (Sandra Belin-Gorsic)
One year apart...! ⌚
📷
17th June 2025 (@alarcos.bsky.social)
29th June 2024 (Sandra Belin-Gorsic)
*My office twice a year !*
#VisitPyrenees ;-)
What we know about our planet and its dynamics / evolution is from Science.
#InvestInScience
#EarthDay
#StandUpForScience
#EarthquakeMonitoring
#VisitPyrenees ;-)
What we know about our planet and its dynamics / evolution is from Science.
#InvestInScience
#EarthDay
#StandUpForScience
#EarthquakeMonitoring
April 22, 2025 at 6:53 PM
*My office twice a year !*
#VisitPyrenees ;-)
What we know about our planet and its dynamics / evolution is from Science.
#InvestInScience
#EarthDay
#StandUpForScience
#EarthquakeMonitoring
#VisitPyrenees ;-)
What we know about our planet and its dynamics / evolution is from Science.
#InvestInScience
#EarthDay
#StandUpForScience
#EarthquakeMonitoring
Reposted by Denis Lombardi
🧪🌊🧵 Despite having his job at NOAA terminated @zacklabe.com has still brought his visualisations that show the alarming recent trend in Antarctic sea-ice extent up to date.
zacklabe.com/antarctic-se...
1/2
zacklabe.com/antarctic-se...
1/2
Antarctic: Sea-Ice Concentration/Extent/Thickness
My visualizations: Arctic Climate Seasonality and Variability Arctic Sea Ice Extent and Concentration Arctic Sea Ice Volume and Thickness Arctic Temperatures Antarctic Sea Ice Extent and Concentrat…
zacklabe.com
March 3, 2025 at 1:49 PM
🧪🌊🧵 Despite having his job at NOAA terminated @zacklabe.com has still brought his visualisations that show the alarming recent trend in Antarctic sea-ice extent up to date.
zacklabe.com/antarctic-se...
1/2
zacklabe.com/antarctic-se...
1/2
Reposted by Denis Lombardi
I have a PhD studentship available for a UK-resident mechanical engineer, physicist or engineering-minded geoscientist - developing a free-floating probe that'll travel through water channels inside glaciers in Greenland!
www.findaphd.com/phds/project...
#glacier #glaciology #phd
www.findaphd.com/phds/project...
#glacier #glaciology #phd
February 24, 2025 at 2:05 PM
I have a PhD studentship available for a UK-resident mechanical engineer, physicist or engineering-minded geoscientist - developing a free-floating probe that'll travel through water channels inside glaciers in Greenland!
www.findaphd.com/phds/project...
#glacier #glaciology #phd
www.findaphd.com/phds/project...
#glacier #glaciology #phd