Daan van den Broek
@daanvandenbroek.com
Researcher @ Finnish Meteorological Institute
Freelance Writer
MSc in Atmospheric Sciences, University of Helsinki
www.daanvandenbroek.com
Main interests: Meteorology | Climate | Polar Regions | Nature | Energy Transition
Opinions & views are my own
Freelance Writer
MSc in Atmospheric Sciences, University of Helsinki
www.daanvandenbroek.com
Main interests: Meteorology | Climate | Polar Regions | Nature | Energy Transition
Opinions & views are my own
Pinned
Daan van den Broek
@daanvandenbroek.com
· Apr 16
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
📚 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)
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)
🌋For those into geology: my partner Anna Sartell recently published her first main-author article!
A new review + high-precision dating of Arctic igneous and volcanic rocks. The publication offers new insights into ancient large-scale volcanism in the High Arctic 👇
doi.org/10.1029/2024...
A new review + high-precision dating of Arctic igneous and volcanic rocks. The publication offers new insights into ancient large-scale volcanism in the High Arctic 👇
doi.org/10.1029/2024...
January 15, 2026 at 12:25 PM
🌋For those into geology: my partner Anna Sartell recently published her first main-author article!
A new review + high-precision dating of Arctic igneous and volcanic rocks. The publication offers new insights into ancient large-scale volcanism in the High Arctic 👇
doi.org/10.1029/2024...
A new review + high-precision dating of Arctic igneous and volcanic rocks. The publication offers new insights into ancient large-scale volcanism in the High Arctic 👇
doi.org/10.1029/2024...
Reposted by Daan van den Broek
Antarctica update 🇦🇶
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
January 14, 2026 at 10:17 AM
Antarctica update 🇦🇶
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
Antarctica update 🇦🇶
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
January 14, 2026 at 10:17 AM
Antarctica update 🇦🇶
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
I'm back to 'normal work' at the FMI office.
At the end of last year, I lived my dream, having the privilege of spending a month in the Antarctic.
In this thread I’m sharing my experiences.
#PolarinAmbassador
🧵(1/18)
🌡️2025 was the 3rd warmest year on record🌡️
The global average temperature was 1.47°C above pre-industrial levels, clearly below 2024 (1.60°C) and almost tied with 2023 (1.48°C), according to @copernicusecmwf.bsky.social.
The global average temperature was 1.47°C above pre-industrial levels, clearly below 2024 (1.60°C) and almost tied with 2023 (1.48°C), according to @copernicusecmwf.bsky.social.
January 14, 2026 at 5:02 AM
🌡️2025 was the 3rd warmest year on record🌡️
The global average temperature was 1.47°C above pre-industrial levels, clearly below 2024 (1.60°C) and almost tied with 2023 (1.48°C), according to @copernicusecmwf.bsky.social.
The global average temperature was 1.47°C above pre-industrial levels, clearly below 2024 (1.60°C) and almost tied with 2023 (1.48°C), according to @copernicusecmwf.bsky.social.
Storm damage 🌲
The effects of Storm Hannes🇫🇮 / Storm Johannes🇸🇪 in Liesjärvi National Park, 1.5 week ago. Countless trees are down.
🧵 (1/2)
The effects of Storm Hannes🇫🇮 / Storm Johannes🇸🇪 in Liesjärvi National Park, 1.5 week ago. Countless trees are down.
🧵 (1/2)
January 12, 2026 at 9:43 AM
Storm damage 🌲
The effects of Storm Hannes🇫🇮 / Storm Johannes🇸🇪 in Liesjärvi National Park, 1.5 week ago. Countless trees are down.
🧵 (1/2)
The effects of Storm Hannes🇫🇮 / Storm Johannes🇸🇪 in Liesjärvi National Park, 1.5 week ago. Countless trees are down.
🧵 (1/2)
The current cold in Northern Finland is remarkable, both in terms of severity, as well as in terms of persistence.
The first 10 days of the year had an average temperature below -30°C (!!) in Muonio Oustajärvi, by far the coldest start of the year in its (short) measurement history. 🥶
🧵(1/4)
The first 10 days of the year had an average temperature below -30°C (!!) in Muonio Oustajärvi, by far the coldest start of the year in its (short) measurement history. 🥶
🧵(1/4)
January 10, 2026 at 1:45 PM
The current cold in Northern Finland is remarkable, both in terms of severity, as well as in terms of persistence.
The first 10 days of the year had an average temperature below -30°C (!!) in Muonio Oustajärvi, by far the coldest start of the year in its (short) measurement history. 🥶
🧵(1/4)
The first 10 days of the year had an average temperature below -30°C (!!) in Muonio Oustajärvi, by far the coldest start of the year in its (short) measurement history. 🥶
🧵(1/4)
Reposted by Daan van den Broek
Nature research paper: Climate change shifts the North Pacific storm track polewards
go.nature.com/4jy48Vh
go.nature.com/4jy48Vh
Climate change shifts the North Pacific storm track polewards - Nature
An observation-based storm-track proxy shows that the winter North Pacific storm track has shifted substantially polewards, suggesting regional impacts on precipitation and warming patterns, with implications for temperature variability and extreme events.
go.nature.com
January 9, 2026 at 11:56 AM
Nature research paper: Climate change shifts the North Pacific storm track polewards
go.nature.com/4jy48Vh
go.nature.com/4jy48Vh
Extremely low minimum temperatures in Lapland this morning. 🥶
-42.8°C Savukoski Tulppio
-42.3°C Salla Naruska
-41.7°C Kittilä lentoasema
-40.3°C Kittilä Pakatti
Values are valid until 9:50 local time. Return period for some of the temperatures measured in Lapland are >30 years.
Extreme cold!
-42.8°C Savukoski Tulppio
-42.3°C Salla Naruska
-41.7°C Kittilä lentoasema
-40.3°C Kittilä Pakatti
Values are valid until 9:50 local time. Return period for some of the temperatures measured in Lapland are >30 years.
Extreme cold!
January 9, 2026 at 8:02 AM
Extremely low minimum temperatures in Lapland this morning. 🥶
-42.8°C Savukoski Tulppio
-42.3°C Salla Naruska
-41.7°C Kittilä lentoasema
-40.3°C Kittilä Pakatti
Values are valid until 9:50 local time. Return period for some of the temperatures measured in Lapland are >30 years.
Extreme cold!
-42.8°C Savukoski Tulppio
-42.3°C Salla Naruska
-41.7°C Kittilä lentoasema
-40.3°C Kittilä Pakatti
Values are valid until 9:50 local time. Return period for some of the temperatures measured in Lapland are >30 years.
Extreme cold!
Although seawater is still about 1°C warmer than average in many places, freeze-up along Baltic coastlines is underway, thanks to the recent very cold weather.
January 8, 2026 at 12:42 PM
Although seawater is still about 1°C warmer than average in many places, freeze-up along Baltic coastlines is underway, thanks to the recent very cold weather.
Reposted by Daan van den Broek
2025 was the 2nd warmest year on record in Finland.
The 50-year warming trend is 0.59 °C/decade and that trend itself has doubled in 20 years.
The 50-year warming trend is 0.59 °C/decade and that trend itself has doubled in 20 years.
January 7, 2026 at 8:26 AM
2025 was the 2nd warmest year on record in Finland.
The 50-year warming trend is 0.59 °C/decade and that trend itself has doubled in 20 years.
The 50-year warming trend is 0.59 °C/decade and that trend itself has doubled in 20 years.
Reposted by Daan van den Broek
In addition, the first week of January has been the coldest since 2010, with an average temperature of +1°C (normal ~+3.7°C).
January 8, 2026 at 12:22 PM
In addition, the first week of January has been the coldest since 2010, with an average temperature of +1°C (normal ~+3.7°C).
❄️❄️❄️ Truly remarkable snow depths for the Netherlands: regionally up to 30 cm!
Almost the entire country has seen snow in recent days. Multiple consecutive days with (locally thick) nation-wide snow cover have become rare.
Maps show snow cover in 🇳🇱 on 5, 6, 7, and 8th of January, respectively.
Almost the entire country has seen snow in recent days. Multiple consecutive days with (locally thick) nation-wide snow cover have become rare.
Maps show snow cover in 🇳🇱 on 5, 6, 7, and 8th of January, respectively.
January 8, 2026 at 12:11 PM
❄️❄️❄️ Truly remarkable snow depths for the Netherlands: regionally up to 30 cm!
Almost the entire country has seen snow in recent days. Multiple consecutive days with (locally thick) nation-wide snow cover have become rare.
Maps show snow cover in 🇳🇱 on 5, 6, 7, and 8th of January, respectively.
Almost the entire country has seen snow in recent days. Multiple consecutive days with (locally thick) nation-wide snow cover have become rare.
Maps show snow cover in 🇳🇱 on 5, 6, 7, and 8th of January, respectively.
One of the most consistent cold ensembles I have seen.
Strong ensemble support for a prolonged, very cold period.
Remarkable agreement across the main traditional and AI models, too.
If it verifies, Southern Finland is headed for a very cold January for current climatological standards.
Strong ensemble support for a prolonged, very cold period.
Remarkable agreement across the main traditional and AI models, too.
If it verifies, Southern Finland is headed for a very cold January for current climatological standards.
January 7, 2026 at 10:17 AM
One of the most consistent cold ensembles I have seen.
Strong ensemble support for a prolonged, very cold period.
Remarkable agreement across the main traditional and AI models, too.
If it verifies, Southern Finland is headed for a very cold January for current climatological standards.
Strong ensemble support for a prolonged, very cold period.
Remarkable agreement across the main traditional and AI models, too.
If it verifies, Southern Finland is headed for a very cold January for current climatological standards.
The Netherlands from above, yesterday.
It's rare to see the Netherlands like this, nowadays... Beautiful satellite shot!
It's rare to see the Netherlands like this, nowadays... Beautiful satellite shot!
January 7, 2026 at 6:51 AM
The Netherlands from above, yesterday.
It's rare to see the Netherlands like this, nowadays... Beautiful satellite shot!
It's rare to see the Netherlands like this, nowadays... Beautiful satellite shot!
Another day with snowfall, another day of chaos in the Netherlands. ❄️🇳🇱
About 3-10 cm of fresh snow will fall in much of the Netherlands. Trains and flights are once again cancelled.
About 3-10 cm of fresh snow will fall in much of the Netherlands. Trains and flights are once again cancelled.
January 7, 2026 at 6:35 AM
Another day with snowfall, another day of chaos in the Netherlands. ❄️🇳🇱
About 3-10 cm of fresh snow will fall in much of the Netherlands. Trains and flights are once again cancelled.
About 3-10 cm of fresh snow will fall in much of the Netherlands. Trains and flights are once again cancelled.
Thundersnow! ❄️⚡️
Once again, intense snow showers with thunder over the Netherlands!🇳🇱
A rare phenomenon that only occurs in deep convective clouds, when cold upper air moves over relatively warm water surfaces.
Temp at 850hPa (~1400m): -8°C
500 hPa (~5500m): -40°C
Sea surface temperatures: 6-7°C
Once again, intense snow showers with thunder over the Netherlands!🇳🇱
A rare phenomenon that only occurs in deep convective clouds, when cold upper air moves over relatively warm water surfaces.
Temp at 850hPa (~1400m): -8°C
500 hPa (~5500m): -40°C
Sea surface temperatures: 6-7°C
January 5, 2026 at 7:45 PM
Thundersnow! ❄️⚡️
Once again, intense snow showers with thunder over the Netherlands!🇳🇱
A rare phenomenon that only occurs in deep convective clouds, when cold upper air moves over relatively warm water surfaces.
Temp at 850hPa (~1400m): -8°C
500 hPa (~5500m): -40°C
Sea surface temperatures: 6-7°C
Once again, intense snow showers with thunder over the Netherlands!🇳🇱
A rare phenomenon that only occurs in deep convective clouds, when cold upper air moves over relatively warm water surfaces.
Temp at 850hPa (~1400m): -8°C
500 hPa (~5500m): -40°C
Sea surface temperatures: 6-7°C
Also elsewhere in Europe, it is cold. Scandinavia saw temperatures down to -40C.
Helsinki capital region sinking down to -20C again this evening, after Helsinki-Vantaa airport measured -22C in the morning.
Winter in Europe!
Helsinki capital region sinking down to -20C again this evening, after Helsinki-Vantaa airport measured -22C in the morning.
Winter in Europe!
January 5, 2026 at 4:10 PM
Also elsewhere in Europe, it is cold. Scandinavia saw temperatures down to -40C.
Helsinki capital region sinking down to -20C again this evening, after Helsinki-Vantaa airport measured -22C in the morning.
Winter in Europe!
Helsinki capital region sinking down to -20C again this evening, after Helsinki-Vantaa airport measured -22C in the morning.
Winter in Europe!
Snow chaos and (and fun) in the Netherlands! ❄️🇳🇱
Snow showers from sea left a snow cover in many places, locally up to or exceeding 20 cm.
Most snow since February 2021 or December 2017 in many places.
Traffic jams, problems on railways, and hundreds of cancelled flights and delays at Schiphol.
Snow showers from sea left a snow cover in many places, locally up to or exceeding 20 cm.
Most snow since February 2021 or December 2017 in many places.
Traffic jams, problems on railways, and hundreds of cancelled flights and delays at Schiphol.
January 5, 2026 at 4:00 PM
Snow chaos and (and fun) in the Netherlands! ❄️🇳🇱
Snow showers from sea left a snow cover in many places, locally up to or exceeding 20 cm.
Most snow since February 2021 or December 2017 in many places.
Traffic jams, problems on railways, and hundreds of cancelled flights and delays at Schiphol.
Snow showers from sea left a snow cover in many places, locally up to or exceeding 20 cm.
Most snow since February 2021 or December 2017 in many places.
Traffic jams, problems on railways, and hundreds of cancelled flights and delays at Schiphol.
More snow showers will follow tonight and tomorrow❄️☃️
January 3, 2026 at 2:14 PM
More snow showers will follow tonight and tomorrow❄️☃️
Good job by the European weather model.
Many places in the Netherlands are now seeing snow; some even >10cm.
This is Zoelen, close to the city of Tiel🇳🇱
Many places in the Netherlands are now seeing snow; some even >10cm.
This is Zoelen, close to the city of Tiel🇳🇱
January 3, 2026 at 2:07 PM
Good job by the European weather model.
Many places in the Netherlands are now seeing snow; some even >10cm.
This is Zoelen, close to the city of Tiel🇳🇱
Many places in the Netherlands are now seeing snow; some even >10cm.
This is Zoelen, close to the city of Tiel🇳🇱
Final minimum temperatures in southern Finland around or below -20°C.
Kilpisjärvi almost -40°C, with temperatures still sinking...
Kilpisjärvi almost -40°C, with temperatures still sinking...
January 1, 2026 at 10:54 AM
Final minimum temperatures in southern Finland around or below -20°C.
Kilpisjärvi almost -40°C, with temperatures still sinking...
Kilpisjärvi almost -40°C, with temperatures still sinking...
🎇 A very cold start of 2026 in southern Finland! Helsinki-Vantaa Airport approaching -20°C.
Happy new year!
Happy new year!
January 1, 2026 at 1:25 AM
🎇 A very cold start of 2026 in southern Finland! Helsinki-Vantaa Airport approaching -20°C.
Happy new year!
Happy new year!
-12C in Helsinki. Good morning!
December 31, 2025 at 7:09 AM
-12C in Helsinki. Good morning!
The start of the year will be cold and potentially snowy in much of Europe, if the last run of the main European weather model validates.
❄️🥶📉
❄️🥶📉
December 29, 2025 at 8:47 AM
The start of the year will be cold and potentially snowy in much of Europe, if the last run of the main European weather model validates.
❄️🥶📉
❄️🥶📉
Arctic Sea Ice is the thinnest on record in 2025.
The thickness of #Arctic sea ice dropped to a new all-time record low this year around the North Pole (data from PIOMAS). More in my latest 'climate viz of the month' blog: zacklabe.com/climate-viz-... #OpenScience #SciComm #DataViz #OpenData
Climate Viz of the Month
November 2025 Hi! I am happy to share the first of (hopefully) some new graphics in this ‘climate viz of the month’ blog. For quite a few years now, I’ve been procrastinating on figuring out an eff…
zacklabe.com
December 29, 2025 at 7:04 AM
Arctic Sea Ice is the thinnest on record in 2025.