Tessera

“The response to an extreme loss of sea ice is not just the normal response made a bit bigger… it is structurally different.”

A Hidden Antarctic Tipping Point May Have Just Been Triggered

YouTube video by PBS Terra

youtu.be

“We don’t have to spend money on climate science if we are happy to waste it on misguided adaptation” I decided there was no point beating around the bush when speaking with the Senators yesterday.

themercury.com.au

An amazing day of Southern Ocean sessions wrapped up a spectacular week at #OSM26. We leant in to the silent science disco vibe with sign language applause.

A group of Southern Ocean scientists giving a round of applause in sign language.

Ed Doddridge @edoddridge.bsky.social · 9mo ago

Solid advice from the botanical gardens for everyone visiting Glasgow for #OSM26 this week.

A surfboard that was lost near Tasmania and was found, 17 months later, in New Zealand. What did its voyage look like? We can't ever know for sure, but it's fun to dream. 🌊🏄 www.abc.net.au/news/2025-10...

Surfboard survives 17 months at sea to wash up in New Zealand

A barnacle-covered surfboard that spent 17 months at sea and travelled from Tasmania to New Zealand after it was lost off a boat appears set to be reunited with its owner.

abc.net.au

Ooops 😳 Glad everyone is ok!

Breaking: Australia's Antarctic icebreaker scrapes ocean floor near Heard Island

Antarctic icebreaker RSV Nuyina has headed to deeper waters off remote Heard Island in the Southern Ocean while assessments are undertaken to see if the hull has suffered any damage after scraping the...

abc.net.au

New research showing climate impacts from individual fossil fuel projects. 🥵 🔥 🌏 Woodside’s Scarborough project will increase global temps by 0.00039 C and result in millions of extra coral bleaching and hundreds of extra deaths from extreme heat.

For the first time, scientists can show the impact of gas project emissions

Fossil fuel companies and governments argue it's not possible to link climate impacts to specific projects, but Australian researchers have done the numbers.

abc.net.au

Climate Plots@climate-plots.bsky.social · 10mo ago

Looks like we can call it. Antarctic winter sea ice max has happened and was low, but not as low as 2023 or 2024.

Antarctic sea ice extent, by year

Data from https://nsidc.org/data/g02135/versions/3

Dr. Aaron Thierry @thierryaaron.bsky.social · 10mo ago

Spring is arriving here in Tasmania, which means it's time to think about planting tomatoes - we can learn a surprising amount about climate change just by looking at the seasons. 🌱🍅

What planting tomatoes shows us about climate change

It can be hard to grasp the changes climate change is bringing. To see it in your own life, look at the shifting seasons.

theconversation.com

"My biggest concern is that we are starting to see changes cascading through different parts of the Antarctic environment" - Dr. @edoddridge.bsky.social #ClimateEmergency youtu.be/Lwn329y7-AI

Emergency in Antarctica as fears grow that we passed a tipping point

YouTube video by New Scientist

youtu.be

Ed Doddridge @edoddridge.bsky.social · 11mo ago

Come and join us at @imas-utas.bsky.social and help build a next generation coupled ice sheet - ocean model. 🌊🧊

Chen Zhao@czhao-ice.bsky.social · 11mo ago

🌊❄️ We’re hiring a Coupled Ice Sheet–Ocean Modeller at IMAS/UTAS! 🔗 careers.utas.edu.au/ci/en/job/501445/coupled-ice-sheetocean-modeller Please repost or share with anyone who may be interested 🙏 @utas.edu.au @imas-utas.bsky.social @antarctic.bsky.social @antarcticsciaus.bsky.social

Ed Doddridge @edoddridge.bsky.social · 11mo ago

Are you in Hobart and looking for the perfect gift for Father’s Day on Sunday? I can’t help you with that, sorry. But, I am giving a talk to the Royal Society of Tasmania about climate change and Antarctica. All welcome! Sunday 7 September, 4pm, Geology Lecture Theatre, UTAS.

Songs from the South: a cacophony of change around the Antarctic - rst.org.au

Antarctica and the Southern Ocean lie at the heart of our global climate system. The Southern Ocean acts as a key regulator of global climate by connecting our oceans both horizontally and vertically;...

rst.org.au

Ed Doddridge @edoddridge.bsky.social · 12mo ago

"evidence is emerging for rapid, interacting and sometimes self-perpetuating changes in the Antarctic environment" New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.

Emerging evidence of abrupt changes in the Antarctic environment - Nature

Abrupt changes are developing across Antarctica’s ice, ocean and biological systems; some of these changes are intensifying faster than equivalent Arctic changes, potentially irreversibly, and their i...

nature.com

WDEF Chief Meteorologist Austen Onek @wdefaustenonek.bsky.social · 12mo ago

“A 1.5-foot-tall wave might not seem like much, but #tsunamis are waves that extend from the seafloor to the ocean’s surface,” said Ben Hamlington, an oceanographer at NASA’s Jet Propulsion Laboratory in Southern California." #NASA #JPL www.jpl.nasa.gov/news/us-fren...

US-French SWOT Satellite Measures Tsunami After Massive Quake

Data provided by the water satellite, a joint effort between NASA and the French space agency, is helping to improve tsunami forecast models, benefitting coastal communities.

jpl.nasa.gov

PNAS Nexus @pnasnexus.org · last yr.

A study explores the consequences of years with low sea ice in Antarctica, including declining krill populations, warming seas, increased ice-shelf calving, and reduced access for researchers. In PNAS Nexus: academic.oup.com/pnasnexus/ar...

Extreme lows in sea ice induce many changes in the physical, ecological, and societal systems of Antarctica and the Southern Ocean.

😳 So much for the hope that 2025 might be a little less extreme. 🌊🧊

A line graph showing Antarctic sea ice extent anomalies for each year since 1979. The red line, which shows 2025, has just nosedived and is near the grey line for 2024.

PNAS Nexus@pnasnexus.org · last yr.

The impacts of extreme lows in Antarctic summer sea ice are confronting. Read all about it in our new paper just out in @pnasnexus.org

A new study shows these extremes trigger cascading effects—from ocean warming to habitat loss for top predators. The findings underscore the urgent need for sustained long-term monitoring. In New Scientist: www.newscientist.com/article/2486... In PNAS Nexus: academic.oup.com/pnasnexus/ar...

Scenic view of icebergs drifting in water, framed by towering mountains, showcasing Antarctica's summer landscape.

The speed of change that led to previous mass excitations is terrifyingly slow compared to modern change 😳 "In the case of the Permian–Triassic mass extinction, plants were unable to respond on as rapid a time scale as 1,000 to 10,000 years. This resulted in a large extinction event."

Around 250 million years ago, Earth was near-lifeless and locked in a hothouse state. Now scientists know why

The answer confirms scientists’ suspicion that when our planet’s climate crosses certain ‘tipping points’, truly catastrophic ecological collapse can follow.

theconversation.com

Will Hobbs @icecoldwill.bsky.social · last yr.

Q: What happens when we lose Antarctic sea ice in the summer? A: Bad things. A short 🧵 New research out today: academic.oup.com/pnasnexus/ar...

Impacts of Antarctic summer sea-ice extremes

Abstract. Antarctic sea ice plays many crucial roles in the physical environments and ecosystems of Antarctica and the Southern Ocean. In this study, we sy

academic.oup.com

What's Antarctic sea ice ever done for us? Quite a lot! It cools the ocean, protects ice shelves, supports an irreplaceable ecosystem. Oh, and helps the ocean absorb $180 billion of carbon per year. Hopefully we can figure this out whilst there still is some summer sea ice... doi.org/10.1093/pnas...

"The claim an Iranian nuclear bomb would pose an existential threat to Israel or the United States and justifies unilateral, preventive military attacks makes no sense."

Could we live with a nuclear-armed Iran? Reluctantly, yes

Both Israel and the US claim a nuclear-armed Iran would pose an existential threat. It wouldn’t. Here’s why.

theconversation.com