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Daan van den Broek @daanvandenbroek.com · 12h

This may explain while I still had dozens of mosquitoes bothering me on a Lapland trip, despite it being early/mid-October already 😅

Reposted by Daan van den Broek

Mika Rantanen @mikarantane.bsky.social · 1d

Wow, autumn-to-date mean temperature in Sodankylä, Lapland is currently a full two degrees (!) higher than the previous record.

In Sodankylä, records have been kept since 1908.

Time series graph showing the average temperature in Sodankylä Tähtelä between Sep 1 and Oct 9 in 1908–2025.

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Daan van den Broek @daanvandenbroek.com · 13h

For our trip: a full battery (64 kWh Hyundai Kona) at departure from Inari and a quick ‘fill-up’ at a high-power station in Tana while enjoying lunch did the job. 🔋

(40 % battery left upon return, despite strong headwinds along the Arctic coast and temps around 6°C)

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Daan van den Broek @daanvandenbroek.com · 13h

And that’s not counting the medium-power or Tesla super chargers.

EV driving well beyond the Arctic Circle is absolutely feasible.🌲🚘

#alwaysbecharging

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Daan van den Broek @daanvandenbroek.com · 13h

Yesterday we drove this loop through some of the most remote parts of Finnish & Norwegian Lapland, yet EV charging wasn’t a problem at all. 🔋

High-power chargers ⚡️:
• Inari 🇫🇮 – 2× 300 kW
• Kople & Tana 🇳🇴 – 175 kW
• Utsjoki 🇫🇮 – 4× 200 kW

#alwaysbecharging

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Reposted by Daan van den Broek

Robin Hogan @robinjhogan.bsky.social · 11d

So this is pretty amazing - yesterday EarthCARE sampled Hurricane Humberto straight across the eye! The eye of a tropical cyclone is small so a direct hit is rare: this is the first time EarthCARE has hit one after over a year in orbit! (Showing here also VIIRS on NOAA-20 for context.)

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Daan van den Broek @daanvandenbroek.com · 15d

Timing of the first frost is relatively typical, maybe slightly early in the current climate.

Data for the Helsinki Vantaa airport.

The date of the first frost after summer for each year. 2025 is marked in red. Data is for the Helsinki Vantaa airport.

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Daan van den Broek @daanvandenbroek.com · 15d

first frost of the autumn in northern Helsinki today.

Minimum temperatures in Finland today, with blue indicating subzero temperatures.

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Reposted by Daan van den Broek

Mika Rantanen @mikarantane.bsky.social · 19d

Windy day ahead tomorrow. One major factor is the powerful jet stream that facilitates cyclogenesis. Not so often we'll have 90 m/s wind speeds above us.

Forecast 300 hPa wind speeds from GFS model.

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Daan van den Broek @daanvandenbroek.com · Sep 1

The summer as a whole was the 4th warmest on record. Note how the top 4 warmest years all occurred during the last 4 years.

Summer temperatures in Svalbard, 2025 marked in red. The trend line since 1980 is shown in black.

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Daan van den Broek @daanvandenbroek.com · Sep 1

Another extremely warm August on Svalbard. If it looks tame, that's only because last year obliterated the records.

August temperatures on Svalbard, 2025 marked in red. The trend line since 1980 is shown in black.

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Daan van den Broek @daanvandenbroek.com · Aug 22

PS. the current summer is on track to become the 5th warmest on record on Svalbard.

Substantially less warm than last year's, but note that up to 2020, a summer temperature like this was never measured.

Summer temperatures to date (1st of June - 22nd of August). Summer 2025 will likely be the 5th warmest on record.

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Daan van den Broek @daanvandenbroek.com · Aug 22

Read more about their study here 👇

bsky.app/profile/keti...

Ketil Isaksen @ketilisaksen.bsky.social · Aug 18

Our latest research investigates the remarkable heatwave that affected part of the Arctic in the summer of 2024. It caused a 1 percent loss in Svalbard's ice, making this region one of the most significant contributors to global sea-level rise last year www.pnas.org/doi/10.1073/...

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

www.pnas.org

Daan van den Broek @daanvandenbroek.com · Aug 22

Great study, and perfect timing - I was able to highlight your work in 2 presentations in Longyearbyen last week by showing this graph.👇

It tied in perfectly to my main message: Svalbard is losing it's polar climate.
bsky.app/profile/daan...

Daan van den Broek @daanvandenbroek.com · Aug 22

The main message during my presentations in Longyearbyen last week: Svalbard is losing it's polar climate.

The timing of Schuler et al.’s new study couldn’t have been better: I could show this figure illustrating how last summer’s record heat will be the new normal within decades.

A presentation for the guide community on Svalbard, showing the graph from Schuler et al. (2025) – Svalbard’s 2024 record summer: An early view of Arctic glacier meltdown? PNAS, Earth, Atmospheric, and Planetary Sciences

Daan van den Broek @daanvandenbroek.com · Aug 22

The main message during my presentations in Longyearbyen last week: Svalbard is losing it's polar climate.

The timing of Schuler et al.’s new study couldn’t have been better: I could show this figure illustrating how last summer’s record heat will be the new normal within decades.

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Daan van den Broek @daanvandenbroek.com · Aug 22

Do you remember last year's crazy summer temperatures on Svalbard?

A new study by Schuler et al., published this week, finds that by the second half of this century, summers as warm as last year’s will be normal, or even relatively cool.

Summer temperatures on Svalbard, with the extremely warm summer of 2024 highlighted.

Schuler et al. (2025) – Svalbard’s 2024 record summer: An early view of Arctic glacier meltdown? PNAS, Earth, Atmospheric, and Planetary Sciences

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Reposted by Daan van den Broek

Ketil Isaksen @ketilisaksen.bsky.social · Aug 18

Our latest research investigates the remarkable heatwave that affected part of the Arctic in the summer of 2024. It caused a 1 percent loss in Svalbard's ice, making this region one of the most significant contributors to global sea-level rise last year www.pnas.org/doi/10.1073/...

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

www.pnas.org

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Daan van den Broek @daanvandenbroek.com · Aug 22

I already found it surprisingly chilly this morning, but it makes sense now I see this!

A return time of >30 years, according to FMI's statistics. Quite impressive!

Minimum temperatures in Finland today, with colors indicating the statistical return time of such temperatures. The more blue the color, the longer the return time.

Reposted by Daan van den Broek

Mika Rantanen @mikarantane.bsky.social · Aug 15

Very sharp cold front will arrive in the west coast of Finland tonight. The front is associated with wind gusts of > 20 m/s, heavy rainfall and possibly lightning.

Precipitation forecast from ECMWF for Fennoscandia for Fri 15 Aug at 18 UTC. Pronounced rainfall front over the western Finland.

Wind gusts from MEPS forecast at 18 UTC on Fri 15 Aug.

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Reposted by Daan van den Broek

Prof Friederike Otto @frediotto.bsky.social · Aug 14

In July Fennoscandia was hit by a heatwave similar to one that hit the region in 2018. In just seven years, similar events have become almost twice as likely due to increased global temperatures from 1.1 to 1.3°C.

Every fraction of a degree matters! www.worldweatherattribution.org/intense-two-...

Sunset over the sea with a big rock in the sea, distorting the light reflecting from the setting sun

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Daan van den Broek @daanvandenbroek.com · Aug 15

Great to present our recent study on the record-warm summer of 2024 in Svalbard ❄️🔥, right in the climate change hotspot of Longyearbyen itself.

A full audience and great discussion afterwards at UNIS.

On Tuesday I’ll be giving a lecture to students of the Polar Meteorology and Climatology course.

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Reposted by Daan van den Broek

Ketil Isaksen @ketilisaksen.bsky.social · Aug 14

This July reminded us that in the north, heat is not a distant threat but is seeping into hospitals, care facilities & homes. Our infrastructure was not built to withstand these extreme temperatures and our population is increasingly susceptible to dangerous heat www.theguardian.com/environment/...

‘No country is safe’: deadly Nordic heatwave supercharged by climate crisis, scientists say

Historically cool nations saw hospitals overheating and surge in drownings, wildfires and toxic algal blooms

www.theguardian.com

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Reposted by Daan van den Broek

Daan van den Broek @daanvandenbroek.com · Aug 13

The start of August has once again been exceptionally mild on Svalbard.📈

But still ~1°C behind 2024’s record 'schedule'.

A new record is unlikely.

Temps will drop next week, and the preconditioning isn't as 'favourable' as last summer.

📍Longyearbyen (Svalbard) | 1–12 Aug mean temps
📊Data: @yr.no

Graph showing average temperatures from 1–12 August at Longyearbyen (Svalbard). 2024 leads as the warmest, with the former record (2023) notably behind.

2025 is also extremely mild - second warmest for this period - but still ~1°C cooler than 2024.

While August 2025 will likely still end up very warm overall, cooler conditions expected in the remainder of the month mean it won’t reach the extreme levels of 2024.

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Daan van den Broek @daanvandenbroek.com · Aug 13

More information about the extreme summer and August temperatures of 2024 in our recent publication:

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

Svalbard's Record‐Breaking Arctic Summer 2024: Anomalies Beyond Climatological Warming Trends

2024 mean summer and August temperatures on Svalbard reached unprecedented levels, breaking previous records by record margins The August mean temperature falls outside of historically observed c...

agupubs.onlinelibrary.wiley.com

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Daan van den Broek @daanvandenbroek.com · Aug 13

I’m currently in Longyearbyen for a research visit, and on Friday I’ll present our work on the record-shattering summer and August of 2024 - and put summer 2025 into context.

Come join us at UNIS, lecture room Kapp Wijk, Friday at 12:00.

Graph showing August mean temperatures at Svalbard Airport (Longyearbyen). 2024 is highlighted with a red circle and obliterates all previous August records. The former record, set just one year earlier in 2023 and already 0.9°C above the previous record, was exceeded by another 2.6°C.

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