Helmi Räisänen @helmiraisanen.bsky.social · 30/09/2026Jee, meidän kolmivuotisen hankkeen loppuraportti on ulkona! Se paisui melkein 300 sivuiseksi. Ainakaan ei voi kukaan valittaa konkreettisten esimerkkien puutteesta siitä, miten ympäristökriisi voi vaikuttaa Suomen huoltovarmuuteen :-) 1163
Reposted by Helmi RäisänenProf Ian Hall @ianhall.bsky.social · 13/08/2026A striking climate-model result suggests AMOC may have a rate-induced tipping point. 👉 Slow CO₂ increase: AMOC stable to +5.5°C 👉 Faster increase: collapse around +2°C Same climate system. Very different outcome. The rate of warming matters. www.nature.com/articles/s41...nature.comFailure to track a stable AMOC state under rapid climate change - Nature Climate ChangeClimate change is expected to alter oceanic circulation, with the Atlantic Meridional Overturning Circulation (AMOC) at risk of collapse. This work shows that the stability of the AMOC is dependent on... 9245138
Reposted by Helmi RäisänenMikael A. Manninen @mamanninen.bsky.social · 13/08/2026Ihan kuin olisi tutkimusryhmämme tapaamiset neljään ruutuun piirrettynä. 😏 1287
Reposted by Helmi Räisänenthe Juice Media @thejuicemedia.com · 11/08/2026The Government™ has made an ad about Ai Data Centres, and it’s surprisingly honest and informative.youtube.comHonest Government Ad | Ai Data CentresYouTube video by thejuicemedia 26697417
Helmi Räisänen @helmiraisanen.bsky.social · 03/07/2026Welcome to the world of “shifting baseline syndrome,” where the absence of other species is quietly becoming the norm 02617
Reposted by Helmi RäisänenVille Niinistö @villeniinisto.vihreat.fi · 26/06/2026Asiantuntijaraportti varoittaa eurooppalaisten yhteiskuntien häiriönsietokyvyn ja ruokaturvan vaarantumisesta, ellei Euroopan unioni onnistu pysäyttämään ja kääntämään luonnonvaraisten pölyttäjien katoa ja tukemaan tarhattujen mehiläisten elinolosuhteita. www.uef.fi/fi/artikkeli...uef.fiKansainvälinen asiantuntijaraportti varoittaa Eurooppaa uhkaavasta kriisistä, ellei pölyttäjäkatoa onnistuta pysäyttämäänTuoreessa tiekartassa esitetään keinoja luonnonvaraisten pölyttäjäkantojen elvyttämiseksi ja tarhattujen mehiläisten suojelemiseksi. 317548
Reposted by Helmi RäisänenKatharine Hayhoe @katharinehayhoe.com · 21/06/2026This discussion puts its finger squarely on one of the two thorniest issues of geoengineering - namely that, to succeed, it would require multidecadal stable and rational governance of the countries and entities involved. How's that going, these days? 1023980
Helmi Räisänen @helmiraisanen.bsky.social · 15/06/2026We can't decarbonize our way out of resource overuse through cleaner production/technological fixes alone. Demand reduction is essential: material efficiency, sufficiency and societal participation can deliver substantial emissions cuts within realistic resource limits.nature.comDemand-side innovation is the priority for decarbonizing materials - Nature Reviews MaterialsGlobal industrial emissions from bulk materials continue to rise despite climate policies. This Perspective uses an illustrative resource-constrained model of a national transition to net zero to show... 282
Helmi Räisänen @helmiraisanen.bsky.social · 12/06/2026Heard of "multiple breadbasket failures" - simultaneous crop failures across major agricultural regions? A recent paper shows that unprecedented global droughts don't require record-breaking droughts everywhere. Systemic risk can emerge from combinations of moderate shocks.nature.comGlobal record-shattering breadbasket droughts emerge from moderately extreme regional events - Nature CommunicationsThe study shows that global record shattering droughts across major maize producing regions become more likely this century and typically arising from concurrent moderately extreme droughts rather tha... 031
Reposted by Helmi RäisänenDavid Ho @davidho.bsky.social · 10/06/2026New metaphor just droppednytimes.comHuge American Flag Flies Into Power Lines, Knocking Out Power for Thousands 244383
Helmi Räisänen @helmiraisanen.bsky.social · 04/06/2026Saatiin Ilmatieteen laitoksen johdolla lisää rahaa AMOCin tutkimiseen! 🌊 The Government is funding our research project on the AMOC, led by the Finnish Meteorological Institute! valtioneuvosto.fi/-/1410903/su...valtioneuvosto.fiSuomi varautuu Atlantin valtameren kiertoliikkeen (AMOC) heikkenemiseen – uusi tutkimushanke käynnistyyIlmatieteen laitoksen vetämä tutkimus tuottaa ensimmäistä kertaa kuvauksen Atlantin valtameren kiertoliikkeen (AMOC) heikkenemisen vaikutuksista Suomeen. Valtioneuvoston rahoittama HIIPUVA-hanke vahvi... 25810
Reposted by Helmi RäisänenDr. Aaron Thierry @thierryaaron.bsky.social · 10/05/2026Been seeing a lot of such graphs in recent years 😬 #BraveNewWorld 33817
Helmi Räisänen @helmiraisanen.bsky.social · 16/04/2026“We found that the Amoc is going to decline more than expected compared to the average of all climate models. This means we have an Amoc that is closer to a tipping point.” - Dr Valentin Portmann www.theguardian.com/environment/...theguardian.comCritical Atlantic current significantly more likely to collapse than thoughtScientists say finding is ‘very concerning’ as collapse would be catastrophic for Europe, Africa and the Americas 062
Helmi Räisänen @helmiraisanen.bsky.social · 27/03/2026It’s not the average outcome of global warming we should fear. It’s the extremes already possible under “moderate” warming. New study: even ~2 °C warming can produce climate impacts as severe as average projections at 3–4 °C. www.nature.com/articles/s41...nature.comModerate global warming does not rule out extreme global climate outcomes - NatureExtreme global climate outcomes may occur even under moderate 2 °C warming and may turn out to be more extreme than model-averaged projections at 3 °C or 4 °C warming. 041
Reposted by Helmi RäisänenLauri Myllyvirta @laurimyllyvirta.bsky.social · 03/03/2026It's crazy how reliant the world's entire energy system is on one body of water, the Strait of Hormuz, just 20 nautical miles across at its narrowest, and situated in one of the most volatile regions on Earth. Here are the countries most dependent on oil&gas through the strait. 64926
Helmi Räisänen @helmiraisanen.bsky.social · 20/03/2026Kiinnostava tapahtuma tulossa! Pääsen paneeliin keskustelemaan datatalouden kriittisistä raaka-aineista 040
Reposted by Helmi Räisänenymparistotiedonfoorumi.fi @ymparistotiedonfoorumi.fi · 16/03/2026Ohjelma on nyt julkaistu! 2026 YHYS Politiikkadialogi Datatalouden materiaalinen kestävyys pureutuu datatalouden materiaalisiin reunaehdoihin. 📅 23.4.2026, klo 9-12 📍 Marsio Living Room, Aalto-yliopisto + striimi Lisätietoja ja ilmoittautuminen: www.ymparistotiedonfoorumi.fi/yhys-politii...ymparistotiedonfoorumi.fiYHYS Politiikkadialogi: Datatalouden materiaalinen kestävyys - Ympäristötiedon foorumiDatataloutta kuvataan usein kevyenä ja aineettomana kasvun moottorina. Vuoden 2026 Politiikkadialogi kääntää katseen sen materiaaliseen todellisuuteen: energiaan, luonnonvaroihin ja ihmistyöhön, jotka... 055
Helmi Räisänen @helmiraisanen.bsky.social · 17/03/2026Kiinnostaako Atlantin meridionaalisen kiertoliikkeen (AMOC) hiipuminen ja sen vaikutukset? Tule kuulolle webinaariin to 26.3. klo 9-10! Haastattelen aiheesta Ilmatieteen laitoksen tutkimusprofessoria Aleksi Nummelinia. fiia.fi/tapahtumat/f...fiia.fiFIIA Climate Briefing: Atlantin merivirrat ilmastonmuutoksen keikahduspisteenä - FIIA - Finnish Institute of International AffairsFIIA Tapahtumat 030
Reposted by Helmi RäisänenTere Vadén @terevaden.net · 06/03/2026Oisko liikaa vaadittu, että jos haluaa syödä eläimiä, niin maksaisi niistä sitten täyden hinnan? Ilman niiden kuuluisien veronmaksajien tukia. 48821
Reposted by Helmi RäisänenIan Boudreau @ianboudreau.com · 06/03/2026Made it to Friday but at what cost 5671251445
Reposted by Helmi RäisänenGreenpeace Suomi @greenpeace.fi · 16/02/2026Mitä, jos Venäjän varjolaivastoon kuuluvalla öljytankkerilla tapahtuisi onnettomuus? Kuten teettämämme mallinnus osoittaa, jälki olisi tuhoisaa. Öljyä päätyisi koko Helsingin ja Espoon edustalle ja aiheuttaisi mittavaa tuhoa lukuisilla luonnonsuojelualueilla. www.greenpeace.org/finland/tied... 13117
Helmi Räisänen @helmiraisanen.bsky.social · 05/02/2026Pleased to have contributed as an author to this analysis of impacts and policy responses to a potential AMOC tipping point from a Nordic perspective! pub.norden.org/temanord2026...pub.norden.orgA Nordic Perspective on AMOC TippingThis report is the outcome of the Nordic Council of Minister’s sponsored workshop arranged in October 21-24, 2025 in Helsinki and Rovaniemi, Finland as part of Finland’s council presidency theme resil... 061
Reposted by Helmi RäisänenDamian Carrington @dpcarrington.bsky.social · 05/02/2026Fundamentally flawed economic models mean #climatecrisis could crash global economy, experts warn - Shocks from extreme weather disasters and tipping points are entirely missed by the current models used by governments and financial institutions Story by me www.theguardian.com/environment/...theguardian.comFlawed economic models mean climate crisis could crash global economy, experts warnStates and financial bodies using modelling that ignores shocks from extreme weather and climate tipping points 413270
Helmi Räisänen @helmiraisanen.bsky.social · 04/02/2026'Beneath the country’s political and economic crisis lies a more destabilising force that is still largely missing from international analysis: environmental breakdown. ... Protests increasingly erupt in areas where there is groundwater collapse, land subsidence and water rationing.'theconversation.comIran’s biggest centres of protest are also experiencing extreme pollution and water shortagesShortages of water and power as well as rising air pollution in Iran are at the centre of why citizens are telling their government they want change. 000
Reposted by Helmi RäisänenJuha Länsman @juhalansman.bsky.social · 30/01/2026Uutisen pitäisi olla se, että tämä ei ole uutinen. Edelleen sama touhu, jossa jokainen pienikin metsätilkku on ihan pakko hakata, tai tulevat heinäsirkat, nälänhätä ja maailmanloppu. yle.fi/a/74-2020712...yle.fiSuomen valtio aikoo hakata satoja hehtaareja arvokasta metsää, sanovat järjestöt – lista kohteista julkiOrpon (kok.) hallituksen päättämät vanhojen metsien kriteerit ohjaavat nyt Metsähallituksen hakkuita. 113731
Reposted by Helmi RäisänenLauri Myllyvirta @laurimyllyvirta.bsky.social · 29/01/2026New from us: EU CO2 emissions fell only 0.8% in 2025, the second year in a row that the bloc has fallen short of its targets. Adverse weather played a big role but underlying issues are slow progress on transport and buildings electrification and wind power buildout. 35215
Helmi Räisänen @helmiraisanen.bsky.social · 29/01/2026"For much of the world, ‘normal’ is gone" – Humans are "withdrawing and polluting water beyond renewable inflows and safe depletion limits" and causing irreversible damage to wetlands and lakes that could have helped with restoration. news.un.org/en/story/202...news.un.orgWorld enters era of ‘global water bankruptcy’The world has moved beyond a water crisis and into a state of global water bankruptcy, says a new flagship report released on Tuesday by UN researchers. 071
Reposted by Helmi RäisänenDave Vetter @davidrvetter.bsky.social · 27/01/2026🔥3.8 billion people will be exposed to extreme heat by 2050. Great to see my @smithschool.ox.ac.uk colleague and teacher Radhika Khosla interviewed by @jonathan-watts.bsky.social for the Guardian.theguardian.comNumber of people living in extreme heat to double by 2050 if 2C rise occurs, study findsScientists expect 41% of the projected global population to face the extremes, with ‘no part of the world’ immune 05742
Reposted by Helmi RäisänenJussi Ahokas @ahokasjaj.bsky.social · 22/01/2026Tekoäly voisi muodostaa hallituksen. 1717715
Reposted by Helmi RäisänenDamian Carrington @dpcarrington.bsky.social · 23/01/2026Australia’s worst heatwave since black summer made five times more likely by #climatecrisis, @wwattribution.bsky.social analysis finds - Extreme heat ‘is getting worse and there’s ultimately a limit to what we can physically cope with’ scientist says www.theguardian.com/australia-ne...theguardian.comAustralia’s worst heatwave since black summer made five times more likely by global heating, analysis findsExtreme heat ‘is getting worse and whether we like it or not … there’s ultimately a limit to what we can actually physically cope with,’ scientist says 03523
Helmi Räisänen @helmiraisanen.bsky.social · 15/01/2026Forest loss is shown to exacerbate meteorological drought globally, with boreal regions most affected. Urgent conservation and restoration are needed. www.science.org/doi/10.1126/...science.orgForest loss intensifies meteorological drought in more than half of Earth’s climate zonesForest loss increases the risk of meteorological drought more in boreal zones than in the tropics. 030
Reposted by Helmi RäisänenProf Lisa Schipper 🌍🍉💪 @lisaschipper.bsky.social · 09/01/2026For those thinking that climate change can take a back seat while this other geopolitical mess is addressed - think again. Climate change is in part why Greenland has become so attractive to Pumpkin and his lot. bbc.com/news/videos/...bbc.com'We just want to be left alone': Greenlanders on Trump's takeover threatsThe BBC's Europe Editor Katya Adler visits the Artic island to ask what people think of the US president's plans. 310940
Reposted by Helmi RäisänenJuha Länsman @juhalansman.bsky.social · 19/12/2025Tällä bulkkitaloudella se varmasti saadaan Suomen talous nousuun. Metsähallitus vähät välittää mitä hakkaa, ostajaa ei voisi vähempää kiinnostaa mitä ostaa. Valtakunnassa kaikki hyvin. www.sttinfo.fi/tiedote/7170...sttinfo.fiMetsä Group myönsi: luonnonmetsän puut menivät sellukattilaan | GreenpeaceMetsähallitus hakkasi Ylimmäisensuon luonnonmetsän viime perjantaina. Metsä Group myönsi viimein, että yhtiö osti puuta luonnonmetsän hakkuista. 513735
Helmi Räisänen @helmiraisanen.bsky.social · 17/11/2025Thrilled to share I’ll get paid for two years to deepen my existential dread about climate collapse—thanks to the Nessling Foundation! Starting end of 2026 at @bios.fi, I’ll explore how an AMOC collapse could reshape Finland’s society, with a focus on food production. 292
Reposted by Helmi RäisänenFinnish Institute of International Affairs @fiia.fi · 06/11/2025📝New FIIA Briefing Paper Environment-related risks can trigger sudden, cascading effects across sectors and borders. @ezhakala.bsky.social and @helmiraisanen.bsky.social explore environment-related risks as part of comprehensive security and discuss ways to prepare for them. fiia.fi/en/publicati... 133
Reposted by Helmi RäisänenDaan van den Broek @daanvandenbroek.com · 27/10/2025Great, intense conference during the Nordic Tipping Week in Helsinki and Rovaniemi 🇫🇮 last week. Climate scientists, fisheries experts, social researchers, and policy makers came together to discuss what an #AMOC weakening or collapse could mean for the Nordic region and the rest of the world. 12314
Helmi Räisänen @helmiraisanen.bsky.social · 27/10/2025Hyvää alkanutta työviikkoa. Kaikki on loistavasti. "Two iconic corals that have flourished across Florida’s 560-kilometre-long reef for more than 10,000 years are now ‘functionally extinct’ following the record-breaking 2023 heatwave." www.nature.com/articles/d41...nature.comThese iconic corals are nearly extinct due to heatwaves: can they be saved?Florida’s primary reef-building corals have been declared ‘functionally extinct’ — prompting a shift in conservation strategies. 021
Helmi Räisänen @helmiraisanen.bsky.social · 24/10/2025Just attended Nordic Tipping Week to discuss the latest science on the AMOC tipping point and its societal impacts. Now I’m feeling some serious post-conference anguish. Being back in a world pretending everything’s normal is exhausting. The cognitive dissonance is heavy. 1204
Reposted by Helmi RäisänenProf. Stefan Rahmstorf @rahmstorf.bsky.social · 23/10/2025New study by Falkena et al. shows that most climate models don’t capture the established key mechanism that can destabilize the North Atlantic subpolar gyre. Those models that get it predict abrupt subpolar gyre changes in coming decades 😳. @swinda.bsky.social esd.copernicus.org/articles/16/... 9367158
Reposted by Helmi RäisänenDavid Wallace-Wells @dwallacewells.bsky.social · 08/10/2025“‘We must stop expecting carbon offsetting to work at scale,’ said Stephen Lezak, a researcher at the University of Oxford’s Smith School. ‘We have assessed 25 years of evidence and almost everything up until this point has failed.’” www.theguardian.com/environment/...theguardian.comCarbon offsets fail to cut global heating due to ‘intractable’ systemic problems, study saysAnalysis of 25 years of evidence shows most schemes are poor quality and fail to lower emissions 27029
Helmi Räisänen @helmiraisanen.bsky.social · 06/10/2025Nearly 40% of global transboundart river basins could face potential conflicts driven by water scarcity in 2041–2050, with hotspots in Africa, southern and central Asia, the Middle East, and North America www.nature.com/articles/s41...nature.comTransboundary conflict from surface water scarcity under climate change - Nature CommunicationsTransboundary river basins (TRBs) are at an increasing risk of water scarcity-induced conflicts. Nearly 40% of global TRBs could face such conflicts by 2050, but measures such as intra-basin cooperation could reduce this proportion to less than 10%. 032
Reposted by Helmi RäisänenDr. Crystal A. Kolden @pyrogeog.bsky.social · 02/10/2025Published today: our new paper showing a 44-year trend of increasing global wildfire disasters (fatalities and economic losses) due to climate change-induced extreme weather. www.science.org/doi/10.1126/...science.orgClimate-linked escalation of societally disastrous wildfiresClimate change and land mismanagement are creating increasingly fire-prone built and natural environments. However, despite worsening fire seasons, evidence is lacking globally for trends in socially ... 8401208
Helmi Räisänen @helmiraisanen.bsky.social · 29/09/2025Geologic CO₂ storage capacity is limited (1,460 Gt). Without steep near-term emission cuts, we risk exhausting capacity before 2200. Even at max use, storage only lowers warming by 0.7 °C—making it a finite, intergenerational resource for climate strategy. www.nature.com/articles/s41...nature.comA prudent planetary limit for geologic carbon storage - NatureA risk-based, spatially explicit analysis of carbon storage in sedimentary basins establishes a prudent planetary limit of around 1,460 Gt of geological carbon storage, which requires making explicit decisions on priorities for storage use. 040
Helmi Räisänen @helmiraisanen.bsky.social · 12/09/2025New study finds that warmer oceans could cut populations of Prochlorococcus — the tiny phytoplankton that produce ~20% of Earth’s oxygen and form the base of many marine food webs — by up to 50% in tropical seas by 2100 if surface waters keep rising above ~28 °C. www.nature.com/articles/s41...nature.comFuture ocean warming may cause large reductions in Prochlorococcus biomass and productivity - Nature MicrobiologyDecade-long field measurements and modelling show that projected ocean temperatures could restrict cell division rates of an important marine cyanobacterium. 043