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Georgia Melodie Hole

@gmelodie.bsky.social
1.5K followers 1.2K following 42 posts

Polar biogeoscientist at Durham University, working on sea ice reconstruction. Palaeoenvironments | sea ice | geochemistry | dendrochronology | Arctic

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Georgia Melodie Hole @gmelodie.bsky.social · 08/10/2026
Very happy about this 🤭🦔❤️ The European hedgehog, Atlantic puffin, barn owl and buff-tailed bumblebee and will appear on future British banknotes. www.bbc.co.uk/news/article...
bbc.co.uk
Bank of England reveals the four animals to feature on banknotes
The decision comes after nearly half a million people cast their votes from a shortlist of 18 creatures.
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Georgia Melodie Hole @gmelodie.bsky.social · 29/09/2026
A change of scenery for a couple of months! 🌵 I’ve joined @uarizona.bsky.social’s Laboratory of Tree-Ring Research as an Agnese N. Haury Fellow, exploring Greenland junipers and what they reveal about Arctic climate variability. 🌲❄️ #Dendrochronology #Arctic #TreeRings
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Geography at Durham @geogdurham.bsky.social · 14/09/2026
🌿❄️ How cold is too cold for Arctic shrubs? New research led by @gmelodie.bsky.social shows how unusual “blue rings” in shrub growth rings can reveal when cold disrupts wood development, including the thermal thresholds at which different Arctic shrub species are affected. doi.org/10.1038/s415...
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Georgia Melodie Hole @gmelodie.bsky.social · 11/09/2026
Great to swap poles & present at the UK Antarctic Science Conference 2026, hosted at @durham.ac.uk. I shared my work with the Horizon Europe Past2Future project, synthesising sea ice proxies into reconstructions for Earth System Models, plus energising discussions as we head towards the next IPY.
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ESA Earth Observation @esaearth.esa.int · 13/08/2026
Here comes the S̶u̶n̶ Moon 🌑 On 12 August, a total solar eclipse was visible across parts of Europe, while much of the continent experienced a partial eclipse. From space, MTG-I1 recorded the Moon’s shadow moving across Earth: www.esa.int/ESA_Multimed... 📹ESA/Eumetsat
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Georgia Melodie Hole @gmelodie.bsky.social · 31/07/2026
The social care debate feels very close to home with mention of "devastating amounts of money". My dad developed early onset Alzheimer's at 54. No earning since, and at 68 we pay £1500 a week for his care with advanced dementia. We need reform or a spending cap so families don't lose everything.
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Eos @eos.org · 30/06/2026
Beavers have been spotted as far north as the Arctic Ocean. Understanding the timeline of their move northward is critical for Arctic communities. 🦫🧪 Comments from @gmelodie.bsky.social @durham.ac.uk, Kirt Ruben of the Imaryuk Monitors, & Tom Glass @uafairbanks.bsky.social. eos.org/articles/how...
eos.org
How Beavers Gnawed Their Way into the Arctic - Eos
Historical data on beavers’ Arctic expansion are lacking, but tree rings are shedding light on the timeline.
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Georgia Melodie Hole @gmelodie.bsky.social · 28/05/2026
Attending the #RENKEI UK-Japan Collaboration Lab 2026 🇬🇧🇯🇵 My first time in Japan visiting Tohoku and Sophia Universities in Sendai and Tokyo has been brilliant; making new connections and potential collaborations already, and loving the food, landscape and welcoming people 🚅🍱⛩️🏯🍜 @durham.ac.uk
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Georgia Melodie Hole @gmelodie.bsky.social · 08/05/2026
It has been heartening hearing at #EGU26 how valuable the #P2F syntheses of #seaice proxy datasets for the Holocene, LGM and Last Interglacial will be for palaeoclimate communities. They are on their way (for both poles!), so watch this space! 🌊🧊 @egu.eu @durham.ac.uk @geogdurham.bsky.social
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ESA Journals @esajournals.bsky.social · 27/04/2026
Want to read Hole et al.'s study for yourself? Find it here, in our #OpenAccess journal "Ecosphere": doi.org/10.1002/ecs2...
doi.org
Dendrochronology and remote sensing reveal beaver occupancy and colonization dynamics in an expanding Arctic population
The North American beaver (Castor canadensis) is expanding its distribution in the Arctic tundra. Due to the species' capacity to engineer ecosystems, they can transform surface water dynamics and bi...
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Georgia Melodie Hole @gmelodie.bsky.social · 27/04/2026
Nice coverage of our recent @esajournals.bsky.social research in Canada's national paper, The Globe and Mail, with new evidence of "what Inuvialuit communities have long witnessed": beavers’ expansion "into the Far North, with cascading consequences for waterways, wildlife and a way of life."🦫⬆️
theglobeandmail.com
Beavers, moving deeper into the Far North, gnaw away at an Arctic way of life
New research confirms that North America’s most famous rodents are taking new territory, changing the landscape as they go
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Ecological Society of America @ecologicalsociety.bsky.social · 30/03/2026
Our new media tip sheet is out! Explore fresh research from our journals on: 🐦a new metric for migratory birds 🦊mid-sized carnivore scavenging 🐻‍❄️polar bear adaption 🌲European forestry for birds 🦫& beavers reshaping the Arctic Read it here: ow.ly/O5eU50YAEwh
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Georgia Melodie Hole @gmelodie.bsky.social · 27/03/2026
Very nice to see our new paper feature in the March research news from the @ecologicalsociety.bsky.social: Eager beavers busy moving north 🦫 🌿 ⬆️ Read the highlight and link to the paper to learn more: esa.org/blog/2026/03...
Beaver swimming in a tundra lake in the Inuvialuit Settlement Region
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Georgia Melodie Hole @gmelodie.bsky.social · 12/03/2026
Yes, we feature in that documentary as it is about beavers in both Alaska and northern Canada! It's linked at the end of this thread 🦫🌿❄️
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Georgia Melodie Hole @gmelodie.bsky.social · 12/03/2026
Also key was co-production of knowledge & engagement with impacted Inuit communities. We thank the FJMC, Inuvik and Tuktoyaktuk HTCs, & local community for the privilege of being guests & undertaking research on Inuvialuit lands. CBC documentary on the wider project: gem.cbc.ca/the-nature-o...
Drone surveys of sites in collaboration with the Imaryuk Monitors. Featuring: George Harrison, Kevin Arey, Georgia Melodie Hole, Max Kotokak Sr. Photo by Max Kotokak Sr.Presenting to members of the Tuktoyaktuk Hunters & Trappers Committee, Joint Secretariat & Imaryuk Monitoring Program.
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Georgia Melodie Hole @gmelodie.bsky.social · 12/03/2026
Together these records show beaver activity since around 2008, with satellite data detecting surface water change near dams. Take-home: Combining shrub rings and satellite data can help track Arctic beaver range changes and hydrological impacts. 🔗Read the paper: doi.org/10.1002/ecs2...
View of the hydrological impact of beaver-built dams, holding back water to induce surface water level changes.View of a beaver swimming in the tundra in the Inuvialuit Settlement Region.Beaver lodge constructed from tundra shrub material.
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Georgia Melodie Hole @gmelodie.bsky.social · 12/03/2026
To track past beaver presence, we combined shrub dendrochronology with satellite time-series analysis. Cross-dated browsing scars in willow and alder shrubs recorded when they were active at a site, while satellite time-series revealed the dam-driven surface water changes.
(a-c) Examples of three forms of beaver-browsed shrub stems. (d, e) willow stem cross-sectional stained thin section. (d) Section at browse scar with 7 growth rings; (e) section at root collar where a further 9 growth rings have formed post-beaver browsing. (f) Alder section highlighting scale of ring-width variation and need for thin section for accurate Shrub ring width (SRW) measurements and cross dating.(a) Oblique aerial photo of a beaver impacted site, with dams and lodge in foreground (b) Dates of abrupt surface water expansion detected for each Landsat pixel, derived using modified normalized difference water index (MNDWI) time-series input into the BEAST algorithm.  Pixels shown have a probability of change occurrence exceeding 50%. (c) Bayesian Estimator for Abrupt Change, Seasonal Change and Trend (BEAST) decomposition results based on a single pixel time series within the site. Black dots are the annually aggregated MNDWI observations between 1984 and 2024. Two detected change points with >50% probability are shown as blue bars.
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Georgia Melodie Hole @gmelodie.bsky.social · 12/03/2026
New paper out! Arctic tundra shrubs keep records of beaver colonisation ❄️🦫🌿✏️ Our new study in Ecosphere used shrub growth rings & satellite imagery to reconstruct past beaver colonisation at the northern edge of their range in Arctic Canada. 🔗 doi.org/10.1002/ecs2... @esajournals.bsky.social
A beaver-browsed willow shrub.Overview of beaver-impacted site, with dams and lodge, and lake margins exhibiting evidence of past water-level change.
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Georgia Melodie Hole @gmelodie.bsky.social · 14/11/2025
Enjoyed reconnecting with the many members of @horizoneu.bsky.social project #P2F (Past to Future: Towards Fully Paleo-Informed Future #Climate Projections) in Utrecht last week...including winning the scavenger hunt and getting the secret word - Globorotalia! #foraminifera #paleoclimate #H2020
Group photo of PasttoFuture project members at the General Assembly in Utrecht, November 2025.Team Globorotalia - winners of the meeting scavenger huntUtrecht viewView of the Domtoren, Utrecht
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Georgia Melodie Hole @gmelodie.bsky.social · 10/11/2025
The show also does a great job of highlighting the importance of coproduction of knowledge and engagement with impacted Inuit communities, including when Max Kotokak Sr and Kevin Arey came to the UK to present the Imaryuk Monitoring Programme and its links with the BARIN beaver project.
Max Kotokak Sr. presenting at the British Antarctic Survey in Cambridge, UK, alongside Helen Wheeler, Georgia Melodie Hole, Joseph Culp, Ben DeVries, Callum Pearce and Kevin Arey. The CINUK Annual Science Meeting, November 2023.Community researcher Camellia Gray, community researcher and wildlife monitor Myles Dillon, Georgia Melodie Hole on the road in the Inuvialuit Settlement Region visiting beaver-impacted sitesDrone surveys of sites in collaboration with the Imaryuk Monitors. Featuring: George Harrison, Kevin Arey, Georgia Melodie Hole, Max Kotokak Sr. Photo by Max Kotokak Sr.Max Kotokak Sr. punting in Cambridge with BARIN UK PI Helen Wheeler, Callum Pearce and Georgia Melodie Hole.
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Jesse Farmer @jfarmersalmanac.bsky.social · 07/11/2025
Huge paper for the Arctic Ocean published today in @science.org - a new 30,000 year history of Arctic Ocean sea-ice cover reconstructed from the accumulation of cosmic dust-derived helium-3! www.science.org/doi/10.1126/... (1/n)
science.org
Cosmic dust reveals dynamic shifts in central Arctic sea-ice coverage over the past 30,000 years
Arctic sea-ice loss affects biological productivity, sustenance in coastal communities, and geopolitics. Forecasting these impacts requires mechanistic understanding of how Arctic sea ice responds to ...
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Georgia Melodie Hole @gmelodie.bsky.social · 06/11/2025
That's great, thank you! I should have a paper coming out soon on my part of the work too 🤞🏼🤞🏼
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Georgia Melodie Hole @gmelodie.bsky.social · 05/11/2025
To learn a bit more about beavers in the Arctic tundra, and my work on the @ukri.org CINUK project, check out the 'Beavers from Above' episode of CBC's The Nature of Things! 🦫 gem.cbc.ca/the-nature-o... Premiering tonight on CBC TV at 8 p.m., 8:30NT
Stills from Beavers from Above, with Georgia Melodie Hole, Sarika Cullis-Suzuki, Max Kotokak Sr and Kevin Arey
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Georgia Melodie Hole @gmelodie.bsky.social · 29/10/2025
@geolsoc.bsky.social @geoscientistmag.bsky.social #geoscience #climate #climatechange #bookreview #scicomm #sciencecommunication
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Georgia Melodie Hole @gmelodie.bsky.social · 29/10/2025
My review of ‘The Story of Earth’s Climate in 25 Discoveries’ by Donald Prothero has been published in The Geological Society's Geoscientist magazine. The book is a sweeping exploration of Earth’s 4.5Ga climatic journey and its role in shaping life. Learn more: geoscientist.online/sections/boo...
geoscientist.online
The Story of Earth's Climate in 25 Discoveries: How Scientists Found the Connections Between Climate and Life - GEOSCIENTIST
Donald Prothero takes readers on a sweeping 4.5-billion-year journey that reveals the intimate ties between climate and life.
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Gareth Phoenix @garethphoenix.bsky.social · 17/10/2025
🚨Calling all U.K. Arctic terrestrial scientists. "UK Arctic terrestrial science strengths and priorities workshop" to discuss and then produce a prospectus outlining the UK’s “Strengths & Priorities” in Arctic terrestrial research. Info and registration link here 👇 drive.google.com/file/d/1HV0c...
drive.google.com
UK Arctic terrestrial science workshop.pdf
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Georgia Melodie Hole @gmelodie.bsky.social · 16/10/2025
Great to see the result of the workshop at @noc.ac.uk earlier this year on the contribution of Arctic Ocean science to the International Polar Year 2032/33.
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Guido Grosse @grosseguido.bsky.social · 12/10/2025
The many uses of #driftwood: the first large-scale mapping of Arctic coastlines. #AWI Press release for Carl‘s paper using AI to map driftwood abundance along the North American arctic coast with Planet satellite imagery. www.awi.de/en/about-us/...
awi.de
Multitalent Treibholz: Erste großflächige Kartierung an arktischen Küsten - AWI
Driftwood plays a key role in Arctic coastal ecosystems: it stores carbon, stabilises coastlines and provides a habitat for animals. At the same time, it can offer clues regarding climate change in the Arctic region, providing information on the likes of storm surges, coastal erosion and shifting fluvial dynamics. Despite the crucial role it plays, there is still a lot that we do not know about the large-scale distribution patterns of driftwood. Now, for the first time, researchers from the Alfred Wegener Institute have systematically mapped driftwood deposits along an 11,000 kilometre stretch of coastline in Alaska and North West Canada, using satellite imagery and AI-powered evaluation methods. The result is the largest database ever produced, with researchers able to identify over 19,000 stable driftwood deposits. The findings will soon be published in the Scientific Reports journal.
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Georgia Melodie Hole @gmelodie.bsky.social · 12/10/2025
Interesting! Will this approach be expanded to other Arctic regions?
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Lars Kaleschke @seaice.de · 12/10/2025
Important to know for sea ice reconstructions! Arctic driftwood transport and deposition is determined by sea ice and surface current dynamics; making it a robust proxy for Holocene sea ice reconstructions. agupubs.onlinelibrary.wiley.com/doi/full/10....
agupubs.onlinelibrary.wiley.com
Out of the woods: Driftwood insights into Holocene pan‐Arctic sea ice dynamics
Arctic driftwood transport and deposition is determined by sea ice and surface current dynamics; making it a robust proxy for Holocene sea ice reconstructions The first pan-Arctic collation of Holo...
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Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 09/10/2025
I was today years old when I learned that Picasso overlapped in time with both Charles Darwin and Eminem. True fact.
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Georgia Melodie Hole @gmelodie.bsky.social · 15/09/2025
Always fun to join another UK Arctic Science Conference, this time at @northumbriauni.bsky.social, presenting initial stages of palaeo sea ice reconstruction, synthesis and mapping, within the @horizoneu.bsky.social project Past2Future - towards fully palaeo-informed climate projections.
Myself presenting a poster on 'Sea ice reconstruction and mapping for low and high CO2 climates'. This work is part of the EU Horizon project P2F, that aims to make optimal use of past climatic information to better understand Earth's response to forcings.Polar beers event at the UK Arctic Science Conference, with a talk on creative science communication by Dr Amy MacFarlane.Wylam Brewery, host venue, Newcastle.The UK Arctic Science Conference.
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Georgia Melodie Hole @gmelodie.bsky.social · 02/09/2025
Look forward to reading this!
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OGU Bristol @ogu-bristol.bsky.social · 04/07/2025
Thank you all for attending BOGS 2025! We are a great community, and we look forward to many future successful meetings.
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Georgia Melodie Hole @gmelodie.bsky.social · 03/07/2025
Thank you so much! 🙏🏼
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Georgia Melodie Hole @gmelodie.bsky.social · 03/07/2025
😍🌾🏞️
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Georgia Melodie Hole @gmelodie.bsky.social · 03/07/2025
I spent the last two summers sampling alder and willow shrubs in the tundra, so I do miss those landscapes!
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Zack Labe @zacklabe.com · 25/06/2025
The poor "Sea Ice Index" nsidc.org/data/seaice_... 😢 See thread for more on this tragic data loss: bsky.app/profile/zack...
Screenshot for the NSIDC Sea Ice Index, which says "This data set was recently downgraded to a “Basic” Level of Service. Learn more about what this means for users here" and "The Department of Defense (DoD) will stop processing and delivering the Special Sensor Microwave Imager/Sounder (SSMIS) data no later than 30 June 2025. The SSMIS data are used as input for this NSIDC-produced data set, which will therefore stop processing no later than 30 June 2025. Please contact NSIDC User Services if you have questions."
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Georgia Melodie Hole @gmelodie.bsky.social · 19/06/2025
Last week I was at @noc.ac.uk for the first time since 2012(!) for a workshop on the contribution of Arctic Ocean science to the International Polar Year 2032/33. A great opportunity to help shape priorities for future research with a cross-section of polar ocean experts.
Participants of the workshop on the contribution of UK Arctic Ocean science to the International Polar Year 32/33, hosted at the National Oceanography Centre. Photo credit: NOC.
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Georgia Melodie Hole @gmelodie.bsky.social · 08/05/2025
Thank you!
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Georgia Melodie Hole @gmelodie.bsky.social · 06/05/2025
My photo of cotton grass at dawn on the Arctic Ocean coastline won the Canadian Permafrost Association photo competition! Thank you to everyone who voted :) www.instagram.com/p/DJB8SQqxmz...
Image of cottongrass at dawn on the Arctic Ocean coastline in the Inuvialuit Settlement Region
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Georgia Melodie Hole @gmelodie.bsky.social · 17/04/2025
Very cool 🤩
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Georgia Melodie Hole @gmelodie.bsky.social · 14/03/2025
A great kick off in Utrecht to my role within the new #HorizonEU #Past2Future project, working towards fully palaeo-informed future climate projections. I'm joining @durham-university.bsky.social as a research associate, focusing on Arctic and Antarctic sea ice reconstruction.
Kick off meeting in Utrecht for the Past to Future project - towards fully palaeo-informed future climate protections.
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Prof Michael Meredith 🌊🧪🥼❄️ @oceanandice.bsky.social · 15/02/2025
Sea ice in the Arctic and around Antarctica cool our climate, drive ocean circulation across the planet, and provide a unique habitat for polar ecosystems. Sea ice amounts have now fallen to their lowest since we started measuring them. This is not good. 🌊🥼❄️🧪 www.bbc.co.uk/news/article...
bbc.co.uk
World's sea-ice falls to record low
The world's frozen oceans keep the planet cool, but they currently have less ice than ever recorded before.
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Science Blog @scienceblog.com · 22/01/2025
Ancient Tree Rings Hold Clues to Volcanic Cooling Events In the frigid reaches of northern Norway, a curious phenomenon in tree rings is helping scientists uncover the climatic impact of distant volcanic eruptions from over a century ago. Researchers have discovered that unusually cold summers…
scienceblog.com
Ancient Tree Rings Hold Clues to Volcanic Cooling Events
In the frigid reaches of northern Norway, a curious phenomenon in tree rings is helping scientists uncover the climatic impact of distant volcanic eruptions from over a century ago. Researchers have discovered that unusually cold summers leave behind distinctive blue-tinted rings in trees and shrubs, providing a natural archive of historical temperature drops. The study, published in Frontiers in Plant Science…
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James Bradley @drbradbrad.bsky.social · 21/01/2025
Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake www.nature.com/articles/s41...
nature.com
Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake - Nature Climate Change
How the carbon stocks of the Arctic–Boreal Zone change with warming is not well understood. Here the authors show that wildfires and large regional differences in net carbon fluxes offset the overall ...
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Georgia Melodie Hole @gmelodie.bsky.social · 19/12/2024
"The life span of these sponges appears to be between about 6 and 18 thousand years" 🤯
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Alaska Beacon @alaskabeacon.com · 13/12/2024
Arctic has changed dramatically in just a couple of decades — 2024 report card shows worrying trends in snow, ice, wildfire and more, writes Twila Moon, Matthew Druckenmiller and Rick Thoman, @alaskawx.bsky.social, for @us.theconversation.com, via @alaskabeacon.com: alaskabeacon.com/2024/12/13/a...
alaskabeacon.com
Arctic has changed dramatically in just a couple of decades • Alaska Beacon
Commentary authors write of the Arctic Report Card that gases released by wildfires and thawing tundra add to human-produced emissions.
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Simon Evans @drsimevans.carbonbrief.org · 09/12/2024
Ooft, this FT climate graphic of the week "First ice-free day in the Arctic Ocean may come before 2030, study shows" www.ft.com/content/6...
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