Amundsen Sea
@amundsensea.bsky.social
Southern Ocean sea frequently blamed for West Antarctic Ice loss, but widely misunderstood.
Reposted by Amundsen Sea
There’s so much happening right now, I thought I’d put together a running thread on the dismantling of #climate and research and knowledge infrastructure in the United States 🧵
May 7, 2025 at 12:11 PM
There’s so much happening right now, I thought I’d put together a running thread on the dismantling of #climate and research and knowledge infrastructure in the United States 🧵
Reposted by Amundsen Sea
All latitude bands were warmer than average over the last 3 months. This was particularly notable across the Antarctic around the South Pole (austral winter).
Plot shows zonal-mean temperature anomalies, where latitude = y-axis (not scaled by distance). GISTEMPv4 data using their 1951-1980 baseline
Plot shows zonal-mean temperature anomalies, where latitude = y-axis (not scaled by distance). GISTEMPv4 data using their 1951-1980 baseline
September 28, 2025 at 12:26 AM
All latitude bands were warmer than average over the last 3 months. This was particularly notable across the Antarctic around the South Pole (austral winter).
Plot shows zonal-mean temperature anomalies, where latitude = y-axis (not scaled by distance). GISTEMPv4 data using their 1951-1980 baseline
Plot shows zonal-mean temperature anomalies, where latitude = y-axis (not scaled by distance). GISTEMPv4 data using their 1951-1980 baseline
Reposted by Amundsen Sea
🔴⚠️🌀🛰The second Cat.5 #Hurricane of the season after Erin in the Atlantic. #Humberto intensified in few hours reaching gusts at 310km/h with an 30km wide eye.The last back to back seasons with 2 Cat 5 Hurricanes was in the 1930s.⬇️Latest 10hrs by GOES19 IR. #climateemergency
September 28, 2025 at 1:29 AM
🔴⚠️🌀🛰The second Cat.5 #Hurricane of the season after Erin in the Atlantic. #Humberto intensified in few hours reaching gusts at 310km/h with an 30km wide eye.The last back to back seasons with 2 Cat 5 Hurricanes was in the 1930s.⬇️Latest 10hrs by GOES19 IR. #climateemergency
Reposted by Amundsen Sea
phys.org/news/2025-09...
"The natural phenomenon of upwelling, which occurs annually in the Gulf of Panama, failed for the first time on record in 2025."
"The natural phenomenon of upwelling, which occurs annually in the Gulf of Panama, failed for the first time on record in 2025."
For the first time in 40 Years, Panama's deep and cold ocean waters fail to emerge
The natural phenomenon of upwelling, which occurs annually in the Gulf of Panama, failed for the first time on record in 2025. A study led by scientists from the Smithsonian Tropical Research Institut...
phys.org
September 1, 2025 at 11:34 PM
phys.org/news/2025-09...
"The natural phenomenon of upwelling, which occurs annually in the Gulf of Panama, failed for the first time on record in 2025."
"The natural phenomenon of upwelling, which occurs annually in the Gulf of Panama, failed for the first time on record in 2025."
Reposted by Amundsen Sea
This will continue to fuel thinking and debate on the net value or harm of Antarctic tourism. The average tourist trip emits more carbon than a typical European does in a year.
To pay it off, tourism needs to generate a huge post-cruise benefit to the climate.
www.abc.net.au/news/2025-08...
To pay it off, tourism needs to generate a huge post-cruise benefit to the climate.
www.abc.net.au/news/2025-08...
Fancy a trip to Antarctica? Research reveals 'significant' carbon footprint
More than 100,000 international tourists — including almost 10,000 Australians — travel to Antarctica each year. But a new study shows that getting there creates a significant carbon footprint.
www.abc.net.au
August 28, 2025 at 11:31 PM
This will continue to fuel thinking and debate on the net value or harm of Antarctic tourism. The average tourist trip emits more carbon than a typical European does in a year.
To pay it off, tourism needs to generate a huge post-cruise benefit to the climate.
www.abc.net.au/news/2025-08...
To pay it off, tourism needs to generate a huge post-cruise benefit to the climate.
www.abc.net.au/news/2025-08...
Anyone who doubts how much difference a change in ocean circulation can make should check out what's been happening to the West Antarctic Ice Sheet since I started sending more warm water onto the continental shelf a few decades ago.
I was shocked when I first saw these results from standard climate models used in IPCC reports: for high emissions, the Atlantic overturning circulation #AMOC shuts down in all 9 models that ran past 2100, and is well on the way to shutdown by 2100.
Our paper on that is out today.🧵
Our paper on that is out today.🧵
August 30, 2025 at 9:26 AM
Anyone who doubts how much difference a change in ocean circulation can make should check out what's been happening to the West Antarctic Ice Sheet since I started sending more warm water onto the continental shelf a few decades ago.
Reposted by Amundsen Sea
More sad news for the polar community... Arctic Research Consortium of the United States (@arcus-arctic.bsky.social) is shutting down.
We all lose here. The past 8 months have been unthinkable, and their consequences for the future even more so.
We all lose here. The past 8 months have been unthinkable, and their consequences for the future even more so.
August 29, 2025 at 6:48 PM
More sad news for the polar community... Arctic Research Consortium of the United States (@arcus-arctic.bsky.social) is shutting down.
We all lose here. The past 8 months have been unthinkable, and their consequences for the future even more so.
We all lose here. The past 8 months have been unthinkable, and their consequences for the future even more so.
Reposted by Amundsen Sea
For all the sea ice nerds, NSIDC has announced a new version of the sea ice index that replaces SSMIS data with AMSR2 (starting Jan 1, 2025 and continuing for all future updates).
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
New version release: NOAA/NSIDC Sea Ice Index, Version 4 | National Snow and Ice Data Center
NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
nsidc.org
August 1, 2025 at 11:14 AM
For all the sea ice nerds, NSIDC has announced a new version of the sea ice index that replaces SSMIS data with AMSR2 (starting Jan 1, 2025 and continuing for all future updates).
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
Reposted by Amundsen Sea
Contrarian climate assessment from U.S. government draws swift pushback | Science | AAAS www.science.org/content/arti...
Contrarian climate assessment from U.S. government draws swift pushback
Researchers say DOE report cherry-picks data to downplay threat of greenhouse gases
www.science.org
July 31, 2025 at 8:32 AM
Contrarian climate assessment from U.S. government draws swift pushback | Science | AAAS www.science.org/content/arti...
Interesting, but it's not surface temperatures that are the main driver of change around Antarctica. For that you need to look deeper.
A look at temperature departures for each of the last 4 decades across the #Antarctic. Lots of spatial variability by region this time of year.
Data from doi.org/10.24381/cds... and uses a 1951-1980 reference period for the anomalies.
Data from doi.org/10.24381/cds... and uses a 1951-1980 reference period for the anomalies.
August 1, 2025 at 5:25 AM
Interesting, but it's not surface temperatures that are the main driver of change around Antarctica. For that you need to look deeper.
Reposted by Amundsen Sea
Right then...
A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts
/thread/
A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts
/thread/
I can't imagine there will be any problems with this summary of climate science
July 30, 2025 at 2:33 PM
Right then...
A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts
/thread/
A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts
/thread/
Reposted by Amundsen Sea
The sea level rise chapter is silly. You can’t infer global sea level rise from a handful of tide gauges in the US because global sea level is *global*. 1/
Ch7 moves to sea level rise, focusing (and we're seeing a pattern now) on noisy data from individual tide guages - ignoring global data from satellite altmetry which identify with high confidence a global-scale acceleration in sea level rise. www.climate.gov/news-feature...
July 31, 2025 at 7:54 PM
The sea level rise chapter is silly. You can’t infer global sea level rise from a handful of tide gauges in the US because global sea level is *global*. 1/
Nicely demonstrates how everywhere in the oceans is connected. The ice I'm melting from West Antarctica will affect sea level all around the world.
NOAA has released their official animation of the propagation of this week's tsunami. It took almost exactly one day to reach Antarctica and was reported at 0.6 feet high.
August 1, 2025 at 5:15 AM
Nicely demonstrates how everywhere in the oceans is connected. The ice I'm melting from West Antarctica will affect sea level all around the world.
Reposted by Amundsen Sea
Great news and well done @nsidc.bsky.social!
"NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
This new version uses input data from the JAXA GCOM-W1 AMSR2 instrument for 1 January 2025 through forward processing."
"NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
This new version uses input data from the JAXA GCOM-W1 AMSR2 instrument for 1 January 2025 through forward processing."
New version release: NOAA/NSIDC Sea Ice Index, Version 4 | National Snow and Ice Data Center
NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
nsidc.org
August 1, 2025 at 12:59 AM
Great news and well done @nsidc.bsky.social!
"NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
This new version uses input data from the JAXA GCOM-W1 AMSR2 instrument for 1 January 2025 through forward processing."
"NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
This new version uses input data from the JAXA GCOM-W1 AMSR2 instrument for 1 January 2025 through forward processing."
Reposted by Amundsen Sea
An easter treat! A new @egu-cr.bsky.social blog post is up by Larissa van der Lann!
Grab your easter egg, and have a read!
blogs.egu.eu/divisions/cr...
Grab your easter egg, and have a read!
blogs.egu.eu/divisions/cr...
Celebrating at UNESCO: the first-ever global day for glaciers
2025 marks an important year for glaciers, as it’s the official Year of Glaciers’ Preservation, an initiative by UNESCO and the World Meteorological Organization (WMO). Part of the initiative is also ...
blogs.egu.eu
April 18, 2025 at 10:06 AM
An easter treat! A new @egu-cr.bsky.social blog post is up by Larissa van der Lann!
Grab your easter egg, and have a read!
blogs.egu.eu/divisions/cr...
Grab your easter egg, and have a read!
blogs.egu.eu/divisions/cr...
Reposted by Amundsen Sea
Most of the sea ice in the #Arctic Ocean was around 0.5-2 meters thinner than the 1981-2010 average in March 2025. The largest anomalies were north of Greenland and the Lincoln Sea.
Data from PIOMAS. Graphics at zacklabe.com/arctic-sea-i...
Data from PIOMAS. Graphics at zacklabe.com/arctic-sea-i...
April 18, 2025 at 12:50 PM
Most of the sea ice in the #Arctic Ocean was around 0.5-2 meters thinner than the 1981-2010 average in March 2025. The largest anomalies were north of Greenland and the Lincoln Sea.
Data from PIOMAS. Graphics at zacklabe.com/arctic-sea-i...
Data from PIOMAS. Graphics at zacklabe.com/arctic-sea-i...
Reposted by Amundsen Sea
On March 1, Antarctic sea ice reached its smallest coverage of the year. This year’s minimum extent tied 2022 and 2024 for the second-lowest summer sea ice area observed since satellite records began in 1979. Learn more: www.climate.gov/news-feature...
April 18, 2025 at 8:29 PM
On March 1, Antarctic sea ice reached its smallest coverage of the year. This year’s minimum extent tied 2022 and 2024 for the second-lowest summer sea ice area observed since satellite records began in 1979. Learn more: www.climate.gov/news-feature...
Reposted by Amundsen Sea
Here's a small window into what's actually going on for our situation... 😩
About 650 NOAA staff were illegally terminated last February, then two courts ordered them reinstated.
Last week, many newly rehired NOAA staff were notified via a short letter that the agency “is reverting [their] termination action to its original effective date.”
peer.org/noaa-probat...
Last week, many newly rehired NOAA staff were notified via a short letter that the agency “is reverting [their] termination action to its original effective date.”
peer.org/noaa-probat...
NOAA Probationers Endure Insults Piled Atop Injuries
Callous, Careless Mistakes Plague Those Rehired and Refired
peer.org
April 16, 2025 at 4:57 PM
Here's a small window into what's actually going on for our situation... 😩
Reposted by Amundsen Sea
In some years, sea ice distinctly disappears in the Bellinghausen Sea (red circle) and remains ice-free for several months. This occurrence is happening this year; the last time it happened was in 2023.
The animation shows the Antarctic monthly sea-ice concentration for December 2024 to March 2025.
The animation shows the Antarctic monthly sea-ice concentration for December 2024 to March 2025.
April 10, 2025 at 12:00 PM
In some years, sea ice distinctly disappears in the Bellinghausen Sea (red circle) and remains ice-free for several months. This occurrence is happening this year; the last time it happened was in 2023.
The animation shows the Antarctic monthly sea-ice concentration for December 2024 to March 2025.
The animation shows the Antarctic monthly sea-ice concentration for December 2024 to March 2025.
Reposted by Amundsen Sea
Leadership Update from the Amundsen & Bellinghausen Sector WG! Please welcome:
🔹@andyfthompson.bsky.social (@caltech.edu) as new Co-chair👏
🔹 Won Sang Lee (#KOPRI) joining the leadership 🎉
Learn more about their expertise👉soos.aq/news/new-abs-leadership-2025
@amundsensea.bsky.social #PolarReseach
🔹@andyfthompson.bsky.social (@caltech.edu) as new Co-chair👏
🔹 Won Sang Lee (#KOPRI) joining the leadership 🎉
Learn more about their expertise👉soos.aq/news/new-abs-leadership-2025
@amundsensea.bsky.social #PolarReseach
April 9, 2025 at 11:53 PM
Leadership Update from the Amundsen & Bellinghausen Sector WG! Please welcome:
🔹@andyfthompson.bsky.social (@caltech.edu) as new Co-chair👏
🔹 Won Sang Lee (#KOPRI) joining the leadership 🎉
Learn more about their expertise👉soos.aq/news/new-abs-leadership-2025
@amundsensea.bsky.social #PolarReseach
🔹@andyfthompson.bsky.social (@caltech.edu) as new Co-chair👏
🔹 Won Sang Lee (#KOPRI) joining the leadership 🎉
Learn more about their expertise👉soos.aq/news/new-abs-leadership-2025
@amundsensea.bsky.social #PolarReseach
Reposted by Amundsen Sea
7️⃣ Sea level is committed to rise until 2300 and
beyond, but we can influence how much and how fast
The Paris Agreement scenario buys 100 more years to adapt to a 1m #SeaLevelRise
🔗 view.genially.com/677e7c942787...
beyond, but we can influence how much and how fast
The Paris Agreement scenario buys 100 more years to adapt to a 1m #SeaLevelRise
🔗 view.genially.com/677e7c942787...
March 21, 2025 at 7:54 AM
7️⃣ Sea level is committed to rise until 2300 and
beyond, but we can influence how much and how fast
The Paris Agreement scenario buys 100 more years to adapt to a 1m #SeaLevelRise
🔗 view.genially.com/677e7c942787...
beyond, but we can influence how much and how fast
The Paris Agreement scenario buys 100 more years to adapt to a 1m #SeaLevelRise
🔗 view.genially.com/677e7c942787...
Reposted by Amundsen Sea
Happy World Glacier Day!!
As we enter into the International Year of #Glacier Preservation, we must:
- redouble efforts to scale up political ambition for widespread emissions reductions
- fight to prevent every tenth of a degree of warming
- Ensure countries submit 1.5C aligned NDCs at COP30
As we enter into the International Year of #Glacier Preservation, we must:
- redouble efforts to scale up political ambition for widespread emissions reductions
- fight to prevent every tenth of a degree of warming
- Ensure countries submit 1.5C aligned NDCs at COP30
March 21, 2025 at 4:06 PM
Happy World Glacier Day!!
As we enter into the International Year of #Glacier Preservation, we must:
- redouble efforts to scale up political ambition for widespread emissions reductions
- fight to prevent every tenth of a degree of warming
- Ensure countries submit 1.5C aligned NDCs at COP30
As we enter into the International Year of #Glacier Preservation, we must:
- redouble efforts to scale up political ambition for widespread emissions reductions
- fight to prevent every tenth of a degree of warming
- Ensure countries submit 1.5C aligned NDCs at COP30
Reposted by Amundsen Sea
This land is Greenlandic. Trump has no business claiming Greenland as American.
And his minerals ideas are not based in reality. Read my thoughts : theconversation.com/greenlands-r...
and in this interview: www.spiegel.de/internationa...
❄️
#scicomm
#climate
#science
🧪 🌎 🔬 ⚒️
#geosky
#ClimateAction
And his minerals ideas are not based in reality. Read my thoughts : theconversation.com/greenlands-r...
and in this interview: www.spiegel.de/internationa...
❄️
#scicomm
#climate
#science
🧪 🌎 🔬 ⚒️
#geosky
#ClimateAction
March 16, 2025 at 12:27 AM
This land is Greenlandic. Trump has no business claiming Greenland as American.
And his minerals ideas are not based in reality. Read my thoughts : theconversation.com/greenlands-r...
and in this interview: www.spiegel.de/internationa...
❄️
#scicomm
#climate
#science
🧪 🌎 🔬 ⚒️
#geosky
#ClimateAction
And his minerals ideas are not based in reality. Read my thoughts : theconversation.com/greenlands-r...
and in this interview: www.spiegel.de/internationa...
❄️
#scicomm
#climate
#science
🧪 🌎 🔬 ⚒️
#geosky
#ClimateAction