James Lea
@jamesmlea.bsky.social
Glaciological magpie. Ice, mud and satellite botherer at Liverpool Uni. He/him ❄️🛰️🏳️🌈
Pinned
James Lea
@jamesmlea.bsky.social
· Dec 6
Cathartic update to my #GoogleEarthEngine tools replacing socials link to the *other place* with Bluesky. As a quick reminder of the tools:
GEEDiT - digitising from satellite imagery
GEEClimT - easy access to loads of climate reanalysis products
GEECE - easy and customisable CMIP6 data access tool
GEEDiT - digitising from satellite imagery
GEEClimT - easy access to loads of climate reanalysis products
GEECE - easy and customisable CMIP6 data access tool
GEEDiT helping understand how emperor penguins will respond to climate change!
Really cool study by @geogeordie.bsky.social out now in Antarctic Science 🐧🐧🐧
Really cool study by @geogeordie.bsky.social out now in Antarctic Science 🐧🐧🐧
Our first paper from the 'EPIC' project- 'How will Emperor Penguins Respond to Changing Ice Conditions?'🐧❄️ - is now out. 🎉
My first first-author penguin paper🐧! w co-authors @changingice.bsky.social, Chris Stokes, Melanie Marochov, @ptfretwell.bsky.social, Stéphanie Jenouvrier
tinyurl.com/4635pdwh
My first first-author penguin paper🐧! w co-authors @changingice.bsky.social, Chris Stokes, Melanie Marochov, @ptfretwell.bsky.social, Stéphanie Jenouvrier
tinyurl.com/4635pdwh
Response of emperor penguins to 40 years of changing ice conditions at the Astrid, Mertz and SANAE colonies using satellite remote sensing (1984–2024) | Antarctic Science | Cambridge Core
Response of emperor penguins to 40 years of changing ice conditions at the Astrid, Mertz and SANAE colonies using satellite remote sensing (1984–2024)
www.cambridge.org
January 23, 2026 at 1:59 PM
GEEDiT helping understand how emperor penguins will respond to climate change!
Really cool study by @geogeordie.bsky.social out now in Antarctic Science 🐧🐧🐧
Really cool study by @geogeordie.bsky.social out now in Antarctic Science 🐧🐧🐧
New year, new data for GEEClimT and all your climate reanalysis needs!
Now giving easy access to:
- ERA5 Hourly (1940-present, 292 variables!)
- New *Palaeoclimate* datasets (back to 800k BP!)
- 27 other climate and ocean datasets (>400Tb of data!)
Links and user guide: github.com/jmlea16/GEEC...
Now giving easy access to:
- ERA5 Hourly (1940-present, 292 variables!)
- New *Palaeoclimate* datasets (back to 800k BP!)
- 27 other climate and ocean datasets (>400Tb of data!)
Links and user guide: github.com/jmlea16/GEEC...
January 6, 2026 at 12:36 PM
New year, new data for GEEClimT and all your climate reanalysis needs!
Now giving easy access to:
- ERA5 Hourly (1940-present, 292 variables!)
- New *Palaeoclimate* datasets (back to 800k BP!)
- 27 other climate and ocean datasets (>400Tb of data!)
Links and user guide: github.com/jmlea16/GEEC...
Now giving easy access to:
- ERA5 Hourly (1940-present, 292 variables!)
- New *Palaeoclimate* datasets (back to 800k BP!)
- 27 other climate and ocean datasets (>400Tb of data!)
Links and user guide: github.com/jmlea16/GEEC...
🚨POSTDOC JOB ALERT🚨
We have an exciting opportunity for a 2 year postdoc on remote sensing of icebergs and marine terminating glaciers. See the link below for more info!
Please spread widely, and feel free to email me with any Q's :)
tinyurl.com/2jjcmea9
We have an exciting opportunity for a 2 year postdoc on remote sensing of icebergs and marine terminating glaciers. See the link below for more info!
Please spread widely, and feel free to email me with any Q's :)
tinyurl.com/2jjcmea9
December 17, 2025 at 12:16 PM
🚨POSTDOC JOB ALERT🚨
We have an exciting opportunity for a 2 year postdoc on remote sensing of icebergs and marine terminating glaciers. See the link below for more info!
Please spread widely, and feel free to email me with any Q's :)
tinyurl.com/2jjcmea9
We have an exciting opportunity for a 2 year postdoc on remote sensing of icebergs and marine terminating glaciers. See the link below for more info!
Please spread widely, and feel free to email me with any Q's :)
tinyurl.com/2jjcmea9
Reposted by James Lea
Great work by our colleagues Stewart Jamieson and Guy Paxman: "We have been using satellite data to map an ancient river landscape beneath the East Antarctic Ice Sheet:. The landscape has been frozen in time for up to 34 million years." ⚒️🧪
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Extensive fluvial surfaces at the East Antarctic margin have modulated ice-sheet evolution - Nature Geoscience
Extensive flat surfaces observed beneath the East Antarctic Ice Sheet margin were formed by fluvial erosion and have modulated the ice-sheet response to climate change, according to an analysis of rad...
www.nature.com
July 11, 2025 at 10:57 AM
Great work by our colleagues Stewart Jamieson and Guy Paxman: "We have been using satellite data to map an ancient river landscape beneath the East Antarctic Ice Sheet:. The landscape has been frozen in time for up to 34 million years." ⚒️🧪
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by James Lea
Inspired by many, many viewings with my kids, I wrote something for @uk.theconversation.com that imagines how the Arendelle glacier in Disney's Frozen might look after 200 years of climate change:
theconversation.com/frozen-thawe...
theconversation.com/frozen-thawe...
Frozen, thawed: how Arendelle’s glacier would fare under modern climate change
A glaciologist investigates a Disney classic.
theconversation.com
June 16, 2025 at 3:22 PM
Inspired by many, many viewings with my kids, I wrote something for @uk.theconversation.com that imagines how the Arendelle glacier in Disney's Frozen might look after 200 years of climate change:
theconversation.com/frozen-thawe...
theconversation.com/frozen-thawe...
Reposted by James Lea
Excited that Noah Caldwell's work is officially out in @igsoc.bsky.social Journal of Glaciology! Noah used satellite remote sensing to estimate how much ice is being lost to iceberg calving and subaqueous melt on 55 Alaska lake-terminating glaciers. Read more: doi.org/10.1017/jog....
May 23, 2025 at 2:18 PM
Excited that Noah Caldwell's work is officially out in @igsoc.bsky.social Journal of Glaciology! Noah used satellite remote sensing to estimate how much ice is being lost to iceberg calving and subaqueous melt on 55 Alaska lake-terminating glaciers. Read more: doi.org/10.1017/jog....
Not the bio from #wikipedia I was expecting of new #pope...
May 8, 2025 at 5:58 PM
Not the bio from #wikipedia I was expecting of new #pope...
Finished Danish Duolingo!
Slightly disappointed the owl seems indifferent, though to be fair I did systematically skip all the spoken exercises after resigning myself to never getting the pronunciation right 😅
Slightly disappointed the owl seems indifferent, though to be fair I did systematically skip all the spoken exercises after resigning myself to never getting the pronunciation right 😅
May 4, 2025 at 11:56 AM
Finished Danish Duolingo!
Slightly disappointed the owl seems indifferent, though to be fair I did systematically skip all the spoken exercises after resigning myself to never getting the pronunciation right 😅
Slightly disappointed the owl seems indifferent, though to be fair I did systematically skip all the spoken exercises after resigning myself to never getting the pronunciation right 😅
Unfortunately not at EGU as planned this year, but Steve Brough is stepping in for me this afternoon to tell you how many glaciers globally have disappeared or fragmented since 2000. CW: it's a *lot*
April 30, 2025 at 8:17 AM
Unfortunately not at EGU as planned this year, but Steve Brough is stepping in for me this afternoon to tell you how many glaciers globally have disappeared or fragmented since 2000. CW: it's a *lot*
Reposted by James Lea
I should probably re-introduce myself here to new and old connections…
- Hi my name is Penny and I am a data scientist at the Geological Survey of Denmark and Greenland 🇬🇱 🇩🇰
- I have a Ph.D. in glaciology but have moved away from academia a little with my data scientist role ❄️
- Hi my name is Penny and I am a data scientist at the Geological Survey of Denmark and Greenland 🇬🇱 🇩🇰
- I have a Ph.D. in glaciology but have moved away from academia a little with my data scientist role ❄️
March 23, 2025 at 2:52 PM
I should probably re-introduce myself here to new and old connections…
- Hi my name is Penny and I am a data scientist at the Geological Survey of Denmark and Greenland 🇬🇱 🇩🇰
- I have a Ph.D. in glaciology but have moved away from academia a little with my data scientist role ❄️
- Hi my name is Penny and I am a data scientist at the Geological Survey of Denmark and Greenland 🇬🇱 🇩🇰
- I have a Ph.D. in glaciology but have moved away from academia a little with my data scientist role ❄️
Reposted by James Lea
Please enjoy a moment of Norwegian-Penguin diplomacy taken during Roald Amundsen's successful attempt to reach the South Pole.
March 1, 2025 at 11:25 PM
Please enjoy a moment of Norwegian-Penguin diplomacy taken during Roald Amundsen's successful attempt to reach the South Pole.
Well worth a read for all glacios, and that Karl Schimper (amongst others) should be much better known!
In the meantime, take a look at the early days of glaciology. And why glaciers and other landmarks shouldn't be named after Louis Agassiz: open.substack.com/pub/glaciers...
February 27, 2025 at 1:37 AM
Well worth a read for all glacios, and that Karl Schimper (amongst others) should be much better known!
Reposted by James Lea
Job Alert! Permanent Lecturer in Physical Geography (Teaching & Research), specialising in peatland science. Come join our Department of Geography at The University of Manchester! Deadline 27 March 2025 www.jobs.manchester.ac.uk/Job/JobDetai...
Lecturer in Physical Geography :Oxford Road
www.jobs.manchester.ac.uk
February 21, 2025 at 4:14 PM
Job Alert! Permanent Lecturer in Physical Geography (Teaching & Research), specialising in peatland science. Come join our Department of Geography at The University of Manchester! Deadline 27 March 2025 www.jobs.manchester.ac.uk/Job/JobDetai...
Reposted by James Lea
28 people have added their names already. If you'd like to join us in solidarity and to emphasise the importance of EDI in polar science, then let me know.
www.antarcticglaciers.org/2025/02/pola...
www.antarcticglaciers.org/2025/02/pola...
Polar science needs diversity - AntarcticGlaciers.org
We write in solidarity with our colleagues in the USA and internationally, who are suffering as efforts to increase equality, diversity and inclusion are systematically eroded and destroyed. It is imp...
www.antarcticglaciers.org
February 3, 2025 at 6:09 PM
28 people have added their names already. If you'd like to join us in solidarity and to emphasise the importance of EDI in polar science, then let me know.
www.antarcticglaciers.org/2025/02/pola...
www.antarcticglaciers.org/2025/02/pola...
Reposted by James Lea
Our new paper is out in Nature Geoscience! In an ice-sheet-wide 3-D inventory of crevasses in 2016 and 2021, we find that crevasses are growing in response to ice acceleration on short timescales. @durham-university.bsky.social @byrdpolar.bsky.social @leverhulme.bsky.social
Increased crevassing across accelerating Greenland Ice Sheet margins - Nature Geoscience
Greenland-wide observations of crevasse volume and distribution suggest substantial increases in crevassing between 2016 and 2021 at marine-terminating sectors with accelerating ice flow.
www.nature.com
February 3, 2025 at 10:37 AM
Our new paper is out in Nature Geoscience! In an ice-sheet-wide 3-D inventory of crevasses in 2016 and 2021, we find that crevasses are growing in response to ice acceleration on short timescales. @durham-university.bsky.social @byrdpolar.bsky.social @leverhulme.bsky.social
No aurora flying south from Tromsø, though did manage to get a slightly shaky photo of Venus and Mars just above the Manchester clouds
January 31, 2025 at 7:52 PM
No aurora flying south from Tromsø, though did manage to get a slightly shaky photo of Venus and Mars just above the Manchester clouds
Looks like my flight to Oslo picked up the jet stream on way across the North Sea. According to @flightradar24.com we hit about 930kph!
January 26, 2025 at 11:46 AM
Looks like my flight to Oslo picked up the jet stream on way across the North Sea. According to @flightradar24.com we hit about 930kph!
Just implemented a bug fix highlighted by a GEECE user that was stopping them generating a daily resolution CMIP6 ensemble.
Periodic reminder to let me know when things don't work and I'll fix them!
Periodic reminder to let me know when things don't work and I'll fix them!
January 22, 2025 at 11:50 AM
Just implemented a bug fix highlighted by a GEECE user that was stopping them generating a daily resolution CMIP6 ensemble.
Periodic reminder to let me know when things don't work and I'll fix them!
Periodic reminder to let me know when things don't work and I'll fix them!
"The Vikings" might not be what you think they are...
Really nice (and accessibly written) piece on why "The Viking Age" may only be historically useful as a term if you're looking at English history, and applying it more broadly doesn't make sense. [1/3]
Really nice (and accessibly written) piece on why "The Viking Age" may only be historically useful as a term if you're looking at English history, and applying it more broadly doesn't make sense. [1/3]
Hot off the presses from Prof Alex Woolf: ‘The Viking Paradigm in Early Medieval History’, Early Medieval England and its Neighbours 51. Open access as a bonus! Happy Xmas reading doi.org/10.1017/ean....
December 23, 2024 at 12:22 PM
"The Vikings" might not be what you think they are...
Really nice (and accessibly written) piece on why "The Viking Age" may only be historically useful as a term if you're looking at English history, and applying it more broadly doesn't make sense. [1/3]
Really nice (and accessibly written) piece on why "The Viking Age" may only be historically useful as a term if you're looking at English history, and applying it more broadly doesn't make sense. [1/3]
Reposted by James Lea
I’m thrilled to bits to have been awarded the Richardson Medal by @igsoc.bsky.social. Thanks so much to all my wonderful colleagues and especially to those who nominated me! You’re all so kind. www.igsoc.org/about/awards...
Bethan Davies (2024) | IGS
www.igsoc.org
December 20, 2024 at 8:16 PM
I’m thrilled to bits to have been awarded the Richardson Medal by @igsoc.bsky.social. Thanks so much to all my wonderful colleagues and especially to those who nominated me! You’re all so kind. www.igsoc.org/about/awards...
Super happy to say congratulations to @iceybethan.bsky.social on being awarded the @igsoc.bsky.social Richardson Medal!
Hugely well deserved and really couldn't have happened to a nicer person 🥳🥳🥳
www.igsoc.org/about/awards...
Hugely well deserved and really couldn't have happened to a nicer person 🥳🥳🥳
www.igsoc.org/about/awards...
Bethan Davies (2024) | IGS
www.igsoc.org
December 20, 2024 at 10:36 PM
Super happy to say congratulations to @iceybethan.bsky.social on being awarded the @igsoc.bsky.social Richardson Medal!
Hugely well deserved and really couldn't have happened to a nicer person 🥳🥳🥳
www.igsoc.org/about/awards...
Hugely well deserved and really couldn't have happened to a nicer person 🥳🥳🥳
www.igsoc.org/about/awards...
Last week before Christmas - perfect time to come down with flu 🤒😭
December 18, 2024 at 7:34 PM
Last week before Christmas - perfect time to come down with flu 🤒😭
Reposted by James Lea
TIL that you do occasionally get TWELVE-sided snowflakes, when two six-sided ones collide in the right way and stick together. They seem to stick at a suspiciously perfect angle!
Photos from Ken Libbrecht's brilliant website here:
www.snowcrystals.com...
Photos from Ken Libbrecht's brilliant website here:
www.snowcrystals.com...
December 11, 2024 at 6:14 PM
TIL that you do occasionally get TWELVE-sided snowflakes, when two six-sided ones collide in the right way and stick together. They seem to stick at a suspiciously perfect angle!
Photos from Ken Libbrecht's brilliant website here:
www.snowcrystals.com...
Photos from Ken Libbrecht's brilliant website here:
www.snowcrystals.com...
Looks like I've drawn the Avanti "window seat" sort straw again
December 9, 2024 at 10:09 AM
Looks like I've drawn the Avanti "window seat" sort straw again