Antti-Ilari Partanen

YouTube video by Asiastudiofi Golf-virta romahtaa: Helsinkiin 40 asteen pakkaset?

Olin Asiastudio-podcastin vieraana juttelemassa mahdollisesta Atlantin kiertoliikkeen romahduksesta ja sen vaikutuksista. Paljon asiaa, eikä kaikkea tietenkään muistanut edes kertoa!

www.youtube.com/watch?v=lnRC...

It would be helpful to emphasise that the graph is showing time derivative of forcing, not the actual forcing itself. Could you perhaps show the annual forcing values side-by-side?

Great Oxidation Event - Wikipedia

Jos otetaan huomioon myös historia ennen ihmistä, niin hapen aiheuttama massasukupuutto yli 2 miljardia vuotta sitten nostaisi hapen varmaan aika korkealle. en.wikipedia.org/wiki/Great_O...

The revised calculation regarding overestimated present-day forest-area for Sland makes sense. Could you just calculate Sland in a simpler way as a difference between
S3 and a simulation with historical changes in land cover and harvest rates but climate, N inputs and CO2 from preindustrial?

Announcement that the applications are open for the third Amsterdam Complexity School on Climate Change, with speakers including Clare Farrell, Ben Franta, Julia Steinberger, Vítor Vasconcelos, and Rachel Donald, with more to come!

I am beyond excited to announce that the applications are now open for the third Amsterdam Complexity School on Climate Change!

Come visit a beautiful city, hear from world-renowned experts, and work with passionate individuals on challenges related to climate change.

More info: acscc.nl

Living beyond limits: Consequences of missing the decisive decade for preserving our planet’s life-supporting systems Humanity has pushed Earth’s life-supporting systems to the brink, accelerated by our failures over the past decade. Our only way to limit the duration and magnitude of temperature overshoot is rapid, ...

I will write more about this later, for now just to say our paper has been published today. 10 years after Paris Agreement we can conclusively say we have failed to limit warming to well below 2°C. What next?

www.cell.com/one-earth/ab...

a schematic diagram showing various processes and related indicators for monitoring carbon removal in ocean systems, based on analyzed literature. The diagram divides the processes into three categories represented by different colors: Blue Carbon (green): Focuses on processes related to carbon sequestration and the role of marine ecosystems in capturing and storing carbon. Artificial Upwelling (yellow): Depicts processes that involve artificial interventions in marine environments to increase carbon capture. Ocean Alkalinity Enhancement (blue): Illustrates methods that increase ocean alkalinity, which can help enhance carbon removal. The processes depicted in the diagram include: Carbon Sequestration Potential: This refers to the ability of oceans to capture and store carbon, with an indicator for monitoring this potential. Mineral Dissolution and Seawater Alkalinity Change: These processes are associated with changes in seawater chemistry, enhancing carbon sequestration through increased alkalinity. GHG Emissions: This represents the release of greenhouse gases, which can be measured to monitor the net carbon dynamics in the system. Carbon Removal Rates and Respiration: Shows how carbon is removed from the atmosphere and the role of respiration in this process, measured through carbon flux indicators. Primary Production and Water Masses Detection: This includes the detection of primary production (e.g., photosynthesis) in marine systems that leads to organic carbon formation. Sinking, Remineralization, and Burial: These processes involve the movement of carbon from the surface to deeper ocean layers, with some carbon remineralized and some buried in sediments. 🧪🌊

Marine CO₂ removal lacks standardized indicators to quantify carbon removed and environmental impacts. This absence of reliable metrics prevents verification, inhibits investment, and blocks entry into carbon trading systems.

iopscience.iop.org/article/10.1...

PhD opportunity in oceanography 🌊🌊🌊
"The role of the northwest Atlantic boundary current in the meridional overturning circulation". This is an @o-snap.org related study about the AMOC.
@marineinstitute.bsky.social
@oceanaccess.bsky.social

More information here: www.mi.mun.ca/media/marine...

The new UNEP report is out with the latest estimates of 2100 warming outcomes under current policies, NDCs, and net-zero targets. Here is how it compares to both the IPCC scenarios and other estimates (CAT and IEA, who will release their own updates soon!).

Wow! For long I have been thinking that such a coupled model would be cool, but I haven't come up with good set of research questions for it to write a proposal. I also have had spatial model in mind, but it's probably wise to start with an aggregated model.

An overview of FRIDA v2.1: a feedback-based, fully coupled, global integrated assessment model of climate and humans Abstract. The current crop of models assessed by the Intergovernmental Panel on Climate Change (IPCC) to produce their assessment reports lack endogenous process-based representations of climate-drive...

The FRIDA overview paper: gmd.copernicus.org/articles/18/...

A coupled human-Earth IAM, with integrated climate impacts.

The 2025 state of the climate report: a planet on the brink We are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer

academic.oup.com/bioscience/a...

If you are interested in a postdoc position on the Stanford campus on the climate effects of a slowdown/shutdown of the Atlantic Meridional Overturning Circulation, please contact me.

Atmosphere or ocean modeling experience is a plus.

sustainablesolutions.stanford.edu/people/ken-c...

One of my staff asked an interesting question today; to what extent companies can #patent the ideas behind 'negative emission technologies'. Their reason for asking was a company filing a patent that covers many aspects of the use of ocean alkalinity enhancement for sequestering CO2.

Challenges and opportunities in scaling enhanced weathering for carbon dioxide removal - Nature Reviews Earth & Environment Commercial investment in enhanced rock weathering for carbon dioxide removal on agricultural lands is growing rapidly. This Review explores the potential of large-scale deployment, outlining the challenges faced in science, policy and governance to scale the technology.

Like all other CO₂ removal (CDR) techniques, significantly more research is needed over the next few decades to determine whether enhanced rock weathering is a viable method for CDR.

For nature and hiking, I would also suggest BC. Based on one short visit, Vancouver was also very nice city with beautiful views on the sea and mountains and functional transport system. As a city, Montreal was a great place to live, but Quebec's nature was quite similar to Finland.

Two curves show how the median is different depending on the scenario.

We finally have a new paper out looking at how summary statistics from the AR6 scenario database are highly dependent on the sampling of the database.

High profile statistics are often more representative of the model fingerprint, not the physics.

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

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I made a list (or 'starter pack') of Land Surface Modelers, because that's the kind of thing one does on #bluesky. Please tell your friends and also (v. important) TELL ME if you want to be added. We need more people here! go.bsky.app/Mw4tJ3t

Are you a highly motivated early-career researcher from a developing country or a country in transition, and want to be a Chapter Scientist in the next IPCC report?

Then here is your chance. Deadline 18 October 2025.

www.ictp.it/opportunity/...

Applying the ACE2 Emulator to SST Green's Functions for the E3SMv3 Global Atmosphere Model The Ai2 Climate Emulator broadly captures the top-of-atmosphere (TOA) radiative response to local sea surface temperature (SST) anomalies ACE and EAMv3's global TOA radiation sensitivity to all S...

New paper out. In which we helped the folks at the Allen Institute for AI (AI2) show that their climate emulator does a good (though not perfect) job at reproducing E3SMs' response to different SST boundary conditions.

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agupubs.onlinelibrary.wiley.com/doi/full/10....

Do you think climate science needs to be better communicated? We do too! That's why we are looking for a climate science communication specialist to join the Technical Support Unit of the IPCC Working Group I.
All details can be found here: www.ipcc.ch/2025/09/17/c...
Please share!

Thanks for the clarification! I appreciate the character limits, but I think it's good to include the assumption of current policies when giving the 97% certainty. It's important to also communicate that 2 °C is still (likely) avoidable if we implement proper mitigation policies.

Does the crossing of 2 °C with 97% certainty assume continuation of current policy? I could not quickly find the original estimate. I would assume that there is a better chance to avoid crossing 2 °C if policies are made more stringent.

Joo, jos päästöt olisivat 90-luvulta vähentyneet eikä kasvaneet, niin tilanne olisi tosiaan huomattavasti parempi.

Stabilizing climate requires near‐zero emissions Current international climate mitigation efforts aim to stabilize levels of greenhouse gases in the atmosphere. However, human-induced climate warming will continue for many centuries, even after atm...

Tässä tietääkseni ensimmäinen julkaisu (v. 2008), jossa todettiin että CO₂-päästöt pitää saada nollaan: agupubs.onlinelibrary.wiley.com/doi/full/10....

Lisävaikeutena on ollut, että ilmastotieteessäkin on vasta viimeisen 15 vuoden ajan tullut selväksi, että fossiiliset päästöt pitää saada (netto)nollaan. Aiemmin puhuttiin käsittääkseni enemmän lähinnä päästövähennyksistä, ja poliittiset toimet (ja osittain tavoitteetkin vielä) heijastavat tätä.

Postdoctoral Researcher, convective storm and severe extreme weather events research - The Finnish Meteorological Institute Open job: Postdoctoral Researcher, convective storm and severe extreme weather events research, The Finnish Meteorological Institute - Find all jobs in Valtiolle.fi

There are five post-doctoral positions open in FMI @ilmatieteenlaitos.fi.

One of them will be situated in our unit, and the topic is about convective storms and severe extreme weather events.

Deadline for applications 25.9.2025.

valtiolle.fi/en/jobs/post...

Here is the starter pack you have all been waiting for:

IPCC AR7 Scientists

(the scientists that will write the next assessment report of the Intergovernmental Panel on Climate Change for the next few years)

Thanks @soniaseneviratne.bsky.social

bsky.app/starter-pack...

Podcast: Should We Change Our Planet’s Climate…On Purpose? This week on Entanglements, our hosts talk to an atmospheric chemist and a planetary physicist about geoengineering.

The Undark podcast episode "Entanglements -- #geoengineering" featuring interviews and dialogue with me and Frank Keutsch, is now live. Have a listen. Also available on most of the usual podcast platforms.

undark.org/2025/09/03/p...