Jussi T. Eronen

Not good...

Two miles of ice core on the shelf at our national ice core facility in Lakewood, Colorado. The WAIS Divide core from West Antarctica is a 3400m long (deepest US core, 2nd deepest ice core ever) 68,000 year old record of high resolution climate.

Turns out that sucking CO2 from air is fairly expensive and not easy (and we won't be able to do it at the scale that is needed to ease CO2 emissions in any great quantity at timescales needed). Curbing CO2 emissions is the easiest and fastest way, if we can just agree on it as a society...

Consensus machines Will the AI future inadvertently recenter expertise?

LLMs are fast becoming a major source of information.

In a new piece over at The Climate Brink, I argue that LLMs are fundamentally consensus machines, and could help defragment our information ecosystem – at least if their creators do not put thumbs on the digital scale.

The secrets of the extreme durability of odonata wings Abstract. Essential properties considered in the design, fabrication, and application of contemporary bio/nanomaterials have been modeled on adaptations of

Terrific new paper by @jessicalwarelab.bsky.social and others on dragonfly wings, in particular the hydrocarbons which act in multiple ways - structurally, pheromonally and in terms of water resistance. Wish I were still teaching, I'd use this as a great example. of multiple adaptations.

Chart showing change in the use of online platforms. Over the past few years, four of them have grown in overall use among U.S. adults – TikTok, Instagram, WhatsApp and Reddit. TikTok: 37% of U.S. adults report using the platform, which is slightly up from last year and up from 21% in 2021. Instagram: Half of U.S. adults now report using it, which is on par with last year but up from 40% in 2021. WhatsApp and Reddit: About a third say they use WhatsApp, up from 23% in 2021. And 26% today report using Reddit, compared with 18% four years ago. While YouTube and Facebook continue to sit at the top, the shares of Americans who report using them have remained relatively stable in recent years.

UPDATE: Americans who use
YouTube 84%
Facebook 71%
Instagram 50%
TikTok 37%
WhatsApp 32%
Reddit 26%
Snapchat 25%
X (Twitter) 21%
Threads 8%
Bluesky 4%
Truth Social 3%

Full Pew Research Center report: https://www.pewresearch.org/internet/2025/11/20/americans-social-media-use-2025/

Really great news! (But only on 8-10+ years time range, as the possible drug development is slow business.. for good reasons)

#cop30 decision's "recalling with concern" that "historical cumulative net carbon dioxide emissions account for at least four fifths of the total carbon budget for a 50% probability of limiting global warming to 1.5C" was true *in 2019*.

It's now 94%, best guess. /1

unfccc.int/sites/defaul...

The hard truth is that overshoot is really really hard to get to also..

And if IPCC AR7 is not released until after the GST in 2028, then they will still be using the 2019 number until 2029, when the budget for 1.5°C would have been exceeded...

(unless someone comes up with new bigger budgets)

Tietynlainen ajankuva joo, mutta todellisuudessa mikään tuskin muuttuu, kun molemmat on jo ennestään kuuluneet osaksi Bonnieria..

posted for Sunday, but works equally for Monday!

The first emergence of unprecedented global water scarcity in the Anthropocene - Nature Communications Anthropogenic climate change is projected to cause “Day Zero Drought”, when water demand exceeds supply, emerging as early as 2030 and occurring more frequently than recovery allows, posing escalating...

Just couple of days ago Iran announced that cities need to be moved due to water shortage. That is not an isolated issue, this will be a growing problem in a warmer world.

www.nature.com/articles/s41...

Yeah, not great.

Although there was progress in COP30, not nearly enough to get us to safe trajectory...

This is awful.

Earliest oceanic tetrapod ecosystem reveals rapid complexification of Triassic marine communities Tetrapods invaded oceanic environments after the cataclysmic end-Permian mass extinction (EPME), with temnospondyl amphibian to reptile-dominated assemblages succeeding across the Early Triassic [~251...

Just a few million years after the end-Permian mass extinction event, aquatic reptiles and other vertebrates had recovered to form thriving and diverse oceanic ecosystems, according to a Science study of an Early Triassic-age fossil site in the Arctic.

Learn more: https://scim.ag/4r0k0U1

Excellent reading!

Different kind of pope for the new times.

Yeah. Not an easy question- but our time and challenges do not have easy questions anymore, I am afraid...

Offline: A reservoir of illusions (part 2) Emily Bender is a Professor of Linguistics at the University of Washington in Seattle. Her book, The AI Con: How to Fight Big Tech's Hype and Create the Future We Want (2025), written with Alex Hanna,...

Thus spoke Richard Horton, Editor-in-Chief of The Lancet:

"If it becomes clear that systems of editorial oversight and peer review cannot meet the challenge of AI-generated fake research, the whole edifice of science as a core part of our culture will begin to collapse."

@emilymbender.bsky.social

Saudi Arabia leads attempts to block climate deal, UN chief warns in closed-door talks António Guterres notes talks could fail as a result of negotiating tactics

Petrostates doing what petrostates do....

www.ft.com/content/edf7...

And yes, it is not "new" finding in strict sense, but the scale of the city is largely than thought before

First revealed in spy photos, a Bronze Age city emerges from the steppe An unexpectedly large city lies in a sea of grass inhabited largely by nomads.

New bronze age city discovered. So cool.

arstechnica.com/science/2025...

Hurricane Melissa Winds Reached 252 mph - A Stunning Record Hurricane Melissa caused the strongest winds ever recorded by a dropsonde in a tropical cyclone. Our expert provides details on this stunning development.

Y'all. I knew that Hurricane Melissa was strong, but DANG. It was produced the strongest wind measurement EVER recorded by Hurricane Hunter dropsondes. 252 MPH wind gust. This storm literally produced winds we've never confirmed before in a storm. This My discucssion
www.forbes.com/sites/marsha...

What we know we don’t know: impacts of deep-sea mining on whales, dolphins, sharks, turtles, and other migratory species. Migratory species depend on a vast, interconnected ocean. Disturbance in the deep-sea isn’t localized, it ripples across a globally-connected ocean and impacts made today may persist long aft…

What we know we don’t know: impacts of deep-sea mining on whales, dolphins, sharks, turtles, and other migratory species. – Southern Fried Science

Iran president says capital move now a necessity as water crisis deepens Iran’s capital must be moved because the country “no longer has a choice,” President Masoud Pezeshkian said on Thursday in remarks carried by state media, warning that severe ecological strain has mad...

Victim of climate change and mismanaged resources..

www.iranintl.com/en/202511209...

Cop30 draft text omits mention of fossil fuel phase-out roadmap Exclusive: Summit leadership releases new text despite 29 nations threatening to block progress without commitment

Not good news from COP...

www.theguardian.com/environment/...

Ummmm..

What we know we don’t know: impacts of deep-sea mining on whales, dolphins, sharks, turtles, and other migratory species. Migratory species depend on a vast, interconnected ocean. Disturbance in the deep-sea isn’t localized, it ripples across a globally-connected ocean and impacts made today may persist long aft…

It's about deep-sea mining and how it could impact the animals that migrate through potential mining sites, but it's also about the month I got way too into eels.

What we know we don’t know: impacts of deep-sea mining on whales, dolphins, sharks, turtles, and other migratory species.