Peter T Fretwell @ptfretwell.bsky.social · 26/09/2026Currently (26 Sept 2026) there are four hurricane class storms in the equatorial Pacific at the same time. Is this unprecedented? 030
Peter T Fretwell @ptfretwell.bsky.social · 23/09/2026Latest paper now out www.frontiersin.org/journals/mar...frontiersin.orgFrontiers | An updated census of southern elephant seals Mirounga leonina at South Georgia using satellite imageryHistorically, South Georgia supported the largest breeding population of southern elephant seals Mirounga leonina globally. Yet since 1995, this population h... 011
Reposted by Peter T FretwellCommunications Biology @commsbio.nature.com · 21/09/2026Satellite observations reveal five newly identified emperor penguin colony sites suggesting that colonies are dynamic relocating over long distances in response to changing ice conditions @ptfretwell.bsky.social @bas.ac.uk www.nature.com/articles/s42...nature.comDynamic emperor penguin colonies - Communications BiologySatellite observations reveal five newly identified emperor penguin colony sites, suggesting that colonies are dynamic, relocating over long distances in response to changing ice conditions and reshap... 0136
Peter T Fretwell @ptfretwell.bsky.social · 18/09/2026Emperor penguins are moving to avoid climate change. New paper now out: www.nature.com/articles/s42... 033
Peter T Fretwell @ptfretwell.bsky.social · 18/09/2026Emperor penguins are moving home to avoid climate change. New paper now out: www.nature.com/articles/s42... 023
Reposted by Peter T FretwellBritish Antarctic Survey 🐧 @bas.ac.uk · 17/09/2026Hundreds of whales strand on a remote beach – and no one notices for months. Strandings can be an early warning system for ocean health, flagging pollution, disease, and environmental change. But in remote areas, they often go unseen. 🐳 🧵1/2 13918
Peter T Fretwell @ptfretwell.bsky.social · 05/09/2026www.solcreativefoundry.com/wild-world-a...solcreativefoundry.comWild World: Antarctica Talk & Family Day | Sol Creative FoundryA family day of Antarctic science, craft and storytelling in Dry Drayton, Cambridge, with a talk from British Antarctic Survey scientist Dr Peter Fretwell. 13 September. 020
Peter T Fretwell @ptfretwell.bsky.social · 02/09/2026www.durham.ac.uk/news-events/...durham.ac.ukTracking emperor penguins from space - Durham University 022
Peter T Fretwell @ptfretwell.bsky.social · 27/08/2026NASA piece on our emperor penguin work: science.nasa.gov/earth/earth-...science.nasa.govA Changing World for Emperor Penguins - NASA ScienceExperts are analyzing decades of images from Landsat satellites for clues about how the iconic birds have responded to sea ice disruptions in the past. 023
Peter T Fretwell @ptfretwell.bsky.social · 20/08/2026This is one of my favourite maps in my collection. The ill judged FIDS 1:200k series maps of Antarctica., which tried to map the whole of British Antarctic Territory. Like many of the maps in this series, although it covers 18,000 km2, there is virtually nothing on it. 2161
Reposted by Peter T FretwellLisa Fretwell @lisaefretwell.bsky.social · 16/07/2026I'm starting a new Drawing class in Cottenham as of Sept 8 2026 If you are interested, please just let me know! Bookings are going fast. 021
Reposted by Peter T FretwellGale Sinatra @galesinatra.bsky.social · 27/06/2026I think we just passed oops. 451173255800
Peter T Fretwell @ptfretwell.bsky.social · 13/06/2026Article in the Guardian I'm quoted in highlighting the continued decline of sea ice in West Antarctica, and some of the consequences. 021
Reposted by Peter T FretwellGregory Andrews @lyrebirddream.bsky.social · 10/06/2026Climate change isn’t waiting for us to finish with culture wars. Antarctica proves that every day.👇🏽 www.lyrebirddreaming.com/post/while-w...lyrebirddreaming.comWhile We Look Away, Antarctica is MeltingIf you want a metaphor for our times, you could hardly do better than Antarctica in June 2026. While Pauline Hanson argues about migration and pronouns flags, and everyone gets whipped up into culture... 916684
Peter T Fretwell @ptfretwell.bsky.social · 11/06/2026It's the middle of winter in Antarctica and temperatures have risen to +15 degrees C in some spots. Rain is melting the glaciers when snow should be replenishing them. Signs of accelerating change. 177
Reposted by Peter T FretwellDr Michelle LaRue @drmichellelarue.bsky.social · 02/06/2026We can track emperor penguins’ behavior… in the dark! During winter! When it’s just the males incubating eggs! This new tech gives us a leg up in understanding this iconic species 🌎🧪🦉🦑 Press release here: www.canterbury.ac.nz/news-and-eve... 05412
Reposted by Peter T FretwellDr Michelle LaRue @drmichellelarue.bsky.social · 26/05/2026Here's one for you: our paper has been sent to three journals over the course of nine months... without a full review. The first journal found ONE person. The last journal tried 15 times and no dice. What on earth. Anyone want to read a paper about emperor penguins? 🦉🦑🌍🧪 1916253
Peter T Fretwell @ptfretwell.bsky.social · 22/05/2026www.abc.net.au/news/2026-05...abc.net.auChina and Russia block conservation bid for endangered emperor penguinThe annual meeting of Antarctic Treaty nations has failed to reach consensus to designate the endangered emperor penguin as a "Specially Protected Species". 063
Peter T Fretwell @ptfretwell.bsky.social · 26/04/2026Shrinking Sea Ice Is Ruffling Emperor Penguins’ Feathers eos.org/articles/shr...eos.orgShrinking Sea Ice Is Ruffling Emperor Penguins’ Feathers - EosA scientist stumbled upon evidence of penguin molting sites in satellite data, but the sea ice these birds rely on is disappearing. 011
Reposted by Peter T FretwellHannah Cubaynes @whalesfromspace.bsky.social · 19/03/2026Looking for walrus detectives! 🕵️♀️ 073
Reposted by Peter T FretwellCenter for Biological Diversity @biologicaldiversity.org · 09/04/2026Emperor penguins were just declared endangered by IUCN. In the face of climate change, these beloved penguins have been losing the sea ice they need to survive. This is another urgent warning that the world needs to end our reliance on fossil fuels. 29254
Reposted by Peter T FretwellPolar Prem 🦭(Prem Gill) @polarprem.bsky.social · 07/04/2026Passed my viva and (pending minor corrections) am a “Dr of Seals”! Thanks to my supervisors @ptfretwell.bsky.social and Gareth Rees for guiding me to this stage. #academia #phd #cambridge @bas.ac.uk @scottpolar.bsky.social @ukri.org @wwf.org.uk 1161
Reposted by Peter T FretwellDominic Manchee @dpmanchee.bsky.social · 01/04/2026Link link.dataspace.copernicus.eu/gn5j and lake in close up 031
Peter T Fretwell @ptfretwell.bsky.social · 31/03/2026@bsky.app This weeks Antarctic discovery: The largest lake on the Antarctic Peninsula. Unnamed, as it only deglaciated over the last decade. It's on a place called View Point on the Eastern side of the Peninsula. There are other larger lakes in the region, but this is the largest on the mainland. 130
Reposted by Peter T FretwellPoint Blue Conservation Science @pointblue.bsky.social · 26/03/2026🐧❄️🧪🌏🦑🦉 New publication! Led by @rosetazetta.bsky.social, we used satellite imagery to study Ross Sea #emperorpenguin populations over 20+ years & found that spring colony attendance is closely linked to sea ice conditions. Learn more: shorturl.at/joLZA 2239
Reposted by Peter T FretwellEos @eos.org · 24/03/2026In new research, @ptfretwell.bsky.social @bas.ac.uk discovered emperor #penguin molting sites in satellite images—sites threatened by the disappearance of sea ice. 🐧🧊🧪 Comments from @drmichellelarue.bsky.social at Univ. of Canterbury; story by @andrewchapman.bsky.social. eos.org/articles/shr...eos.orgShrinking Sea Ice Is Ruffling Emperor Penguins’ Feathers - EosA scientist stumbled upon evidence of penguin molting sites in satellite data, but the sea ice these birds rely on is disappearing. 0218
Reposted by Peter T FretwellBritish Antarctic Survey 🐧 @bas.ac.uk · 20/03/2026Hello Walrus-spotters of Bluesky! Meet Dr Hannah Cubaynes, who is leading the Walrus from Space citizen science counting project. Help count here ➡️ geohive.vantor.com/walrus/login Watch Hannah's talk about her (prize-winning) work tracking animals with satellites 👇 www.youtube.com/watch?v=99YS...youtube.comWhales & walrus from space | Dr Hannah Cubaynes Law Prize Lecture | British Antarctic SurveyYouTube video by British Antarctic Survey 02511
Peter T Fretwell @ptfretwell.bsky.social · 18/03/2026If your in London tomorrow come along to the Shackleton Store to hear about "Penguins in Peril" and the Penguin Book of Penguins at a free event.https://shackleton.com/pages/events 022
Reposted by Peter T FretwellBritish Antarctic Survey 🐧 @bas.ac.uk · 18/03/2026Bluesky, we need your help to count walrus! 🦭 Previously on "Walrus from Space", volunteers like you sifted through around 500,000 satellite images to support our conservation research. Now we're asking the you to help us count the walrus in those images 👀 ➡️ geohive.vantor.com/walrus/login 2179131
Peter T Fretwell @ptfretwell.bsky.social · 16/03/2026I can announce that my Antarctic Atlas will be re-issued in paperback in September. I am just in the process of reviewing a retrospective work on the first ever Atlas of Antarctica published by the USSR 60 years ago. It took 10 years and 265 scientists, cartographers and reviewers to compile it! 021
Reposted by Peter T FretwellHeard Island Government @heardislandgov.bsky.social · 13/03/2026Life imitates Art 1128946
Reposted by Peter T Fretwellaretsch.bsky.social @aretsch.bsky.social · 11/03/2026🇦🇶Antarctica 👍👏🏻 Rather too small for official names; but now maybe "Fretwell Islands"👍 📸🛰 #Sentinel2 2016 - 2026 @ptfretwell.bsky.social link.dataspace.copernicus.eu/5lc8 091
Peter T Fretwell @ptfretwell.bsky.social · 11/03/2026You might think that we have the world pretty well mapped. But Antarctica we are still finding new islands. Here are the locations of five islands and a larger island groups I discovered last week! 2102
Reposted by Peter T FretwellWorld Meteorological Organization @wmo-global.bsky.social · 03/03/2026Scientists have discovered that the shrinking sea ice in the Antarctic force penguins to crowd into smaller patches of stable ice to moult. On #WorldWildlifeDay, explore how researchers from @bas.ac.uk are studying this phenomenon using satellites imagery: bit.ly/40K4iQI 03312
Reposted by Peter T FretwellAndrás Zlinszky @azlinszky.bsky.social · 02/03/2026Check compare visualization here: link.dataspace.copernicus.eu/w2h6 (Antarctica is covered by Extra-Wide Swath data, you have to choose HH+VV polarization in the Browser, and use HH Decibel Gamma to see ice and open water) 021
Peter T Fretwell @ptfretwell.bsky.social · 02/03/2026The ice shelf connecting Rothschild Island to Alexander Island has disintegrated. 100 km2 of shelf, a remnant from the Wilkins Ice shelf, broke up on the 1st March, making an 11km wide channel between the two islands. Images from Sentiel-1 151
Reposted by Peter T FretwellBritish Antarctic Survey 🐧 @bas.ac.uk · 25/02/2026Here's the full story on our website: www.bas.ac.uk/news/acciden... And here's the paper in Communications Earth & Environment: www.nature.com/articles/s43...bas.ac.ukAccidental discovery reveals grim future for emperor penguins - British Antarctic SurveyScientists studying satellite images of Antarctica have stumbled upon a discovery that sheds new light on moulting emperor penguins – and reveals a troubling threat to their survival. 0158
Peter T Fretwell @ptfretwell.bsky.social · 25/02/2026Our latest paper is now out, and it's not good news www.bbc.co.uk/news/article...bbc.co.ukEmperor Penguins must change their feathers - it may now be killing themThe birds moult to protect themselves, but in a warming world, it could be endangering them. 064
Reposted by Peter T FretwellDaniel Cressey @dpcressey.bsky.social · 17/02/2026Love this paper title: A roadmap towards monitoring walruses from space academic.oup.com/icesjms/arti... From @bas.ac.uk / @ptfretwell.bsky.social / and othersacademic.oup.comA roadmap towards monitoring walruses from spaceAbstract. Walruses (Odobenus rosmarus) are experiencing rapid habitat change, concomitant with dramatic sea ice declines in the Arctic. Reduction in sea ic 031
Reposted by Peter T FretwellHeard Island Government @heardislandgov.bsky.social · 13/02/2026Two can play this game of Canadian Palantir eh. “We shall track on the beaches, we shall track on the landing grounds, we shall track you in the fields and in the streets, we shall track in the hills; we shall never surrender.” 311716
Peter T Fretwell @ptfretwell.bsky.social · 09/02/2026Nice phytoplankton booms in Marguerite Bay Antarctica 050
Reposted by Peter T Fretwellaretsch.bsky.social @aretsch.bsky.social · 02/02/2026What's going on with the Penguin 🐧 chicks 🐥 ?? Click to enlarge ↕️↔️ 📸🛰 #Sentinel2 Footage: @sentinelonline.bsky.social @ptfretwell.bsky.social Link.dataspace.copernicus.eu/r753 062
Reposted by Peter T FretwellGrant Macdonald❄️ @geogeordie.bsky.social · 27/01/2026Great to visit BAS yesterday to chat penguins and meet more of the wildlife from space community (what a cool name for a research theme). 041
Reposted by Peter T FretwellZack Labe @zacklabe.com · 23/01/2026Friday ice update - #Arctic sea ice extent is currently the *lowest* on record (JAXA data)... • about 500,000 km² below the 2010s mean • about 1,090,000 km² below the 2000s mean • about 1,640,000 km² below the 1990s mean • about 2,110,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i... 17027
Peter T Fretwell @ptfretwell.bsky.social · 23/01/2026There are almost 300,000 data points in the IWC blue whale catch record, not one catch is recorded in the area of recent summer sea ice loss near the coast of West Antarctica. This shows that that Antarctic summer sea ice has not been as low as it is now for more than a century. 161
Reposted by Peter T FretwellGrant Macdonald❄️ @geogeordie.bsky.social · 21/01/2026Our 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/4635pdwhcambridge.orgResponse 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 CoreResponse of emperor penguins to 40 years of changing ice conditions at the Astrid, Mertz and SANAE colonies using satellite remote sensing (1984–2024) 2147
Peter T Fretwell @ptfretwell.bsky.social · 19/01/2026For many years we have watched the Wilkins Ice shelf slowly break up. In 2009 it detached from Charcot Island to form Attenborough Strait. Yesterday, the last sliver joining it to Rothschild Island began to disintegrate. I'm waiting for tomorrow's image. 084
Peter T Fretwell @ptfretwell.bsky.social · 16/01/2026There's a lot of chat about the new subglacial map of Antarctica on the BBC that was generated using inverse modelling. Spot the difference: 060