Mika Rantanen
Researcher in Weather and Climate Change Impact Research in Finnish Meteorological Institute. PhD in meteorology.
- New research on windstorms and their impacts for Finland from my colleagues! Láng-Ritter et al. (2025) show that windstorms arriving from NW are the most damaging (per windstorm basis), but windstorms arriving from SW cause the most damage in total. nhess.copernicus.org/articles/25/...
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- Bad news for birdwatchers: persistent northerly/northeasterly winds will prevail in the Gulf of Finland for at least the next 7-9 days. Favourable weather for the Arctic migration is not expected until the weekend of next week.
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- A typical sight in May evening in the weather radar –based bird migration product: a mass migration of waterfowl heading northeast along the Vyborg Bay towards Russian tundra. Today, it was the turn of common scoters (Melanitta nigra). ilmu.fmi.fi/realtime?lan...
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- Reposted by Mika RantanenA victory for the federal scientific workforce! We could not stand by while this irreparable harm continues at NSF, NOAA and all our scientific agencies. TODAY the judge granted our request to temporarily HALT the mass firings at federal agencies under Trump’s Executive Order.
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- Reposted by Mika RantanenOur children will face unprecedented exposure to weather extremes. Our paper led by Luke Grant and @wimthiery.bsky.social published in @nature.com shows that the generation of our children and grandchildren will be exposed to a lot more weather extremes than ours. www.nature.com/articles/s41...
- Reposted by Mika Rantanen📢 Hot off the press: our new study in Nature, led by Luke Grant and @wimthiery.bsky.social, shows how climate change is redefining what it means to live an "unprecedented life"—facing climate extremes that would have been nearly impossible without human influence. www.nature.com/articles/s41...
- Global temperatures would have risen by 12.2 °C (!) since 1990 if everyone in the world had emitted like the wealthiest top 0.1% in world. Fascinating new study in @natclimate.nature.com by Schöngart et al: www.nature.com/articles/s41...
- Is the Arctic still warming nearly four times faster than the globe? With 66.5°N latitude threshold, the answer is no. During the period 1979–2021, the Arctic warmed 3.7 times faster than the globe. For 1982–2024, the ratio has fallen to 3.3. So it seems that the amplification is slowing down.
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- Over the last 12 months, Finland has been the 6th warmest country in the world, in terms of temperature anomaly. Estonia ranks the 1st with 2.3 °C above normal and overall the Baltic countries are on the podium.
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- Wow, eastern Lapland (Salla Värriötunturi) has received up to 45 cm of snow since yesterday. I don't know, but 45 cm increase between 6 UTC yesterday and today could be close to national records for May.
- Lahti Kilpiäistenpohjan lintutornissa juuri 70 lajia rikki tilhellä. Vielä puuttuu yleisiä lajeja, mm. kuovi, töyhtöhyyppä ja kurki. #tornientaisto
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- "A severe cold spell occurring once in 10 years on average at the 0.5°C warming level would be experienced approximately once in 70 years at the 2.0°C level." New peer-reviewed science on how cold spells respond to climate change in Finland. rmets.onlinelibrary.wiley.com/doi/10.1002/...
- Breaking news: April becomes the 12th consecutive warmer-than-average month in Finland. Such a long streak of warm months has not occurred before, when compared to the 1991–2020 average.
- Reposted by Mika RantanenThe Warming Stripes have now been extended downwards into the ocean and upwards into the stratosphere! Collaborative paper which tells the story of how the stripes were developed, and discusses their extension across the Earth system, is now available in BAMS: journals.ametsoc.org/view/journal...
- Rantanen huomauttaa, että sillä on oma arvonsa, että tulokset on saatu juuri lustotutkimuksen avulla. Aikaisemmin lustotutkimuksiin on usein vedottu silloin, kun on haluttu todistaa, että onhan se ilmasto vaihdellut jyrkästi ennenkin ja lämmintä on ollut aikaisemminkin. www.hs.fi/alueet/art-2...
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- Excited to share that our new paper “Summer 2024 in northern Fennoscandia was very likely the warmest in 2000 years” has been published in npj Climate and Atmospheric Science! See the open-access paper from doi.org/10.1038/s416... Short thread 👇
- Talvi 2024-2025 oli lumisuudeltaan 4. huonoin Helsingissä. Viisi alinta talven lumisummaa: 2020 19 cm vrk 2008 221 cm vrk 1930 260 cm vrk 2025 293 cm vrk 2017 301 cm vrk
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- Viimeksi kuluneet 365 päivää ovat olleet historiallisen lämpimiä Helsingissä. Keskilämpötila on ollut 8,81 astetta. Tämä vuoden pituinen ajanjakso on lämpimin ainakin 144 vuoteen, ja todennäköisesti paljon, paljon pidempäänkin. 🧵Ketju 1/3
- Ilmatieteen laitoksen päivystävät meteorologit sää-, meri- ja ilmastopalvelukeskuksessa ovat harvinaisesti lakossa. Kaikki tuki lakkoilijoille ja toivotaan rauhallista sääviikkoa! yle.fi/a/74-2015723...
- There are several weather stations in southern Finland where the spring has been record dry so far, with only < 20 mm of precipitation since 1 March. Therefore, the heavy rainfall currently over southern Finland is much needed.
- Looks like Latvia has just seen its hottest April day on record. Over 28 degrees in mid-April at these latitudes is pure insanity.
- Ilmatieteen laitoksen pääsiäissääennuste: "Lämpötila kohoaa sisämaassa yleisesti 20:n ja 25 asteen välille." 25 asteen? 18. huhtikuuta? No, huomenna seurataan miten lähelle hellerajaa päästään. www.ilmatieteenlaitos.fi/tiedote/xuy3...
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- Finnish Meteorological Institute is now on Bluesky: @ilmatieteenlaitos.bsky.social Please give it a follow!
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- Check out our new paper just published in GRL! 👇 Here's the expert himself @daanvandenbroek.com presenting the mind-blowing August temperature time series yesterday in our FMI/UHEL weather research meeting.
- 📚 Paper alert! 🧪 Thrilled to share my first scientific publication as a first author! "Svalbard's Record‐Breaking Arctic Summer 2024: Anomalies Beyond Climatological Warming Trends" is just out in Geophysical Research Letters, open access. agupubs.onlinelibrary.wiley.com/doi/full/10.... 🧵(1/5)
