Sasu Karttunen
@skarttunen.me
PhD in Atmospheric Physics & Meteorology. Research Associate @ Bern University of Applied Sciences (BFH) & Delft University of Technology (TU Delft). skarttunen.me
Reposted by Sasu Karttunen
New publication!🌥️
Maija Peltola et al. have measured new particle formation and aerosol properties at the CoastClim coastal atmospheric observatory.
The fascinating results showed e.g. new particle formation at the coast occurred roughly as often as in a boreal forest.
👉 doi.org/10.5194/acp-...
Maija Peltola et al. have measured new particle formation and aerosol properties at the CoastClim coastal atmospheric observatory.
The fascinating results showed e.g. new particle formation at the coast occurred roughly as often as in a boreal forest.
👉 doi.org/10.5194/acp-...
February 10, 2026 at 8:55 AM
New publication!🌥️
Maija Peltola et al. have measured new particle formation and aerosol properties at the CoastClim coastal atmospheric observatory.
The fascinating results showed e.g. new particle formation at the coast occurred roughly as often as in a boreal forest.
👉 doi.org/10.5194/acp-...
Maija Peltola et al. have measured new particle formation and aerosol properties at the CoastClim coastal atmospheric observatory.
The fascinating results showed e.g. new particle formation at the coast occurred roughly as often as in a boreal forest.
👉 doi.org/10.5194/acp-...
There is an urgent need to switch to Europe-based communication, cloud and compute platforms in Europe. The extent of which European public institutions (incl. universities) rely on US tech companies is a serious risk for all of these institutions and the safety of the European population.
January 20, 2026 at 11:55 AM
There is an urgent need to switch to Europe-based communication, cloud and compute platforms in Europe. The extent of which European public institutions (incl. universities) rely on US tech companies is a serious risk for all of these institutions and the safety of the European population.
Reposted by Sasu Karttunen
🧠 What counts as "extreme" heat? Is it a policy threshold, or the moment a resident can't breathe safely?
At UrbanAIR WP5, we’re bridging the gap between hazard simulation and lived experience in Barcelona & Antwerp. 🧵 (1/3)
#UrbanAIR #ClimateSci #DigitalTwin
At UrbanAIR WP5, we’re bridging the gap between hazard simulation and lived experience in Barcelona & Antwerp. 🧵 (1/3)
#UrbanAIR #ClimateSci #DigitalTwin
January 13, 2026 at 9:18 AM
🧠 What counts as "extreme" heat? Is it a policy threshold, or the moment a resident can't breathe safely?
At UrbanAIR WP5, we’re bridging the gap between hazard simulation and lived experience in Barcelona & Antwerp. 🧵 (1/3)
#UrbanAIR #ClimateSci #DigitalTwin
At UrbanAIR WP5, we’re bridging the gap between hazard simulation and lived experience in Barcelona & Antwerp. 🧵 (1/3)
#UrbanAIR #ClimateSci #DigitalTwin
Reposted by Sasu Karttunen
... and an hour later we have beautiful winter sunshine! The Dutch weather never lets you know its next move!
January 5, 2026 at 11:59 AM
... and an hour later we have beautiful winter sunshine! The Dutch weather never lets you know its next move!
A little snow this morning in Delft and much of the NL!
The NL transport system is not happy though. Much of the NS rail lines especially around Amsterdam are inoperable. Traffic is a bit of a chaos as I've heard and the cyclists are struggling. No winter tires of course!
The NL transport system is not happy though. Much of the NS rail lines especially around Amsterdam are inoperable. Traffic is a bit of a chaos as I've heard and the cyclists are struggling. No winter tires of course!
January 5, 2026 at 9:59 AM
A little snow this morning in Delft and much of the NL!
The NL transport system is not happy though. Much of the NS rail lines especially around Amsterdam are inoperable. Traffic is a bit of a chaos as I've heard and the cyclists are struggling. No winter tires of course!
The NL transport system is not happy though. Much of the NS rail lines especially around Amsterdam are inoperable. Traffic is a bit of a chaos as I've heard and the cyclists are struggling. No winter tires of course!
Reposted by Sasu Karttunen
"academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it... The dominant four collectively generated... $12 billion in profits between 2019 and 2024."
November 18, 2025 at 6:48 AM
"academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it... The dominant four collectively generated... $12 billion in profits between 2019 and 2024."
Reposted by Sasu Karttunen
Jos ei usko ilmastonmuutokseen, niin miksi on niin kova tarve hävittää todisteet siitä?
Pimeää, kyynistä ja tuhoisaa menoa.
futurism.com/white-house-...
Pimeää, kyynistä ja tuhoisaa menoa.
futurism.com/white-house-...
White House Orders NASA to Destroy Important Satellite
The White House has instructed NASA employees to destroy two major, climate change-focused satellite missions.
futurism.com
August 5, 2025 at 2:36 PM
Jos ei usko ilmastonmuutokseen, niin miksi on niin kova tarve hävittää todisteet siitä?
Pimeää, kyynistä ja tuhoisaa menoa.
futurism.com/white-house-...
Pimeää, kyynistä ja tuhoisaa menoa.
futurism.com/white-house-...
The huge inflation in the usage of these words in scientific literature is appalling. Science should have better self-esteem and not fall into LinkedIn-speech (although the trend started much before LinkedIn) to justify their work.
Not saying that I've been any better at this.
Not saying that I've been any better at this.
Scientists are increasingly hyping up their findings.
May 26, 2025 at 9:53 AM
The huge inflation in the usage of these words in scientific literature is appalling. Science should have better self-esteem and not fall into LinkedIn-speech (although the trend started much before LinkedIn) to justify their work.
Not saying that I've been any better at this.
Not saying that I've been any better at this.
Reposted by Sasu Karttunen
This is a seismic gut punch to the weather enterprise.
It is impossible to overstate how important @unidata.bsky.social is in implementing many datasets/libraries (LDM, netCDF, THREDDS, metPy) we currently use in meteorological research & operations.
www.unidata.ucar.edu/blogs/news/e...
It is impossible to overstate how important @unidata.bsky.social is in implementing many datasets/libraries (LDM, netCDF, THREDDS, metPy) we currently use in meteorological research & operations.
www.unidata.ucar.edu/blogs/news/e...
NSF Unidata Pause in Most Operations
www.unidata.ucar.edu
May 9, 2025 at 3:50 PM
This is a seismic gut punch to the weather enterprise.
It is impossible to overstate how important @unidata.bsky.social is in implementing many datasets/libraries (LDM, netCDF, THREDDS, metPy) we currently use in meteorological research & operations.
www.unidata.ucar.edu/blogs/news/e...
It is impossible to overstate how important @unidata.bsky.social is in implementing many datasets/libraries (LDM, netCDF, THREDDS, metPy) we currently use in meteorological research & operations.
www.unidata.ucar.edu/blogs/news/e...
I'm happy to share that I've completed my PhD in meteorology!🥳
On Tuesday, I successfully defended my thesis "Modelling and measuring transport processes within urban surface layer at high spatio-temporal resolutions" at the Faculty of Science of @helsinki.fi .
Thanks to everyone involved!
On Tuesday, I successfully defended my thesis "Modelling and measuring transport processes within urban surface layer at high spatio-temporal resolutions" at the Faculty of Science of @helsinki.fi .
Thanks to everyone involved!
April 25, 2025 at 10:56 AM
I'm happy to share that I've completed my PhD in meteorology!🥳
On Tuesday, I successfully defended my thesis "Modelling and measuring transport processes within urban surface layer at high spatio-temporal resolutions" at the Faculty of Science of @helsinki.fi .
Thanks to everyone involved!
On Tuesday, I successfully defended my thesis "Modelling and measuring transport processes within urban surface layer at high spatio-temporal resolutions" at the Faculty of Science of @helsinki.fi .
Thanks to everyone involved!
Dear publishers,
By clicking "Download PDF", I don't mean that I want to open the article in your slow, impractical, and overall just useless online viewer/reader. I just want to get the PDF.
Sincerely,
I think almost every researcher in the world.
By clicking "Download PDF", I don't mean that I want to open the article in your slow, impractical, and overall just useless online viewer/reader. I just want to get the PDF.
Sincerely,
I think almost every researcher in the world.
March 13, 2025 at 10:48 AM
Dear publishers,
By clicking "Download PDF", I don't mean that I want to open the article in your slow, impractical, and overall just useless online viewer/reader. I just want to get the PDF.
Sincerely,
I think almost every researcher in the world.
By clicking "Download PDF", I don't mean that I want to open the article in your slow, impractical, and overall just useless online viewer/reader. I just want to get the PDF.
Sincerely,
I think almost every researcher in the world.
I’m happy to share that I’ve started in a new position as Research Associate at Bern University of Applied Sciences BFH! 🇨🇭
I'm working on the UrbanAIR project (www.urbanair-project.eu), focusing on urban heat and clouds, using remote sensing and data driven methods.
I'm working on the UrbanAIR project (www.urbanair-project.eu), focusing on urban heat and clouds, using remote sensing and data driven methods.
February 17, 2025 at 5:59 PM
I’m happy to share that I’ve started in a new position as Research Associate at Bern University of Applied Sciences BFH! 🇨🇭
I'm working on the UrbanAIR project (www.urbanair-project.eu), focusing on urban heat and clouds, using remote sensing and data driven methods.
I'm working on the UrbanAIR project (www.urbanair-project.eu), focusing on urban heat and clouds, using remote sensing and data driven methods.
I finally submitted my PhD thesis "Modelling and measuring transport processes within the urban surface layer at high spatio-temporal resolutions" for examination a week ago on Tuesday.
This also marks the end of my time at Univ. of Helsinki, I'm currently spending my remaining holidays in India!
This also marks the end of my time at Univ. of Helsinki, I'm currently spending my remaining holidays in India!
January 29, 2025 at 4:28 PM
I finally submitted my PhD thesis "Modelling and measuring transport processes within the urban surface layer at high spatio-temporal resolutions" for examination a week ago on Tuesday.
This also marks the end of my time at Univ. of Helsinki, I'm currently spending my remaining holidays in India!
This also marks the end of my time at Univ. of Helsinki, I'm currently spending my remaining holidays in India!
Check out our new preprint on Geoscientifc Model Development on SLUrb, a single-layer urban canopy model for PALM. SLUrb allows for representing urban surfaces with non-building-resolving grids in PALM, extending PALM's urban capabilities to O(10 m) resolutions.
gmd.copernicus.org/preprints/gm...
gmd.copernicus.org/preprints/gm...
PALM-SLUrb v24.04: A single-layer urban canopy model for the PALM model system – Model description and first evaluation
Abstract. Urban areas are recognized as critical zones for climate research due to the high number of people living in these areas and their significant impacts on local and regional climates. However...
gmd.copernicus.org
January 3, 2025 at 8:02 AM
Check out our new preprint on Geoscientifc Model Development on SLUrb, a single-layer urban canopy model for PALM. SLUrb allows for representing urban surfaces with non-building-resolving grids in PALM, extending PALM's urban capabilities to O(10 m) resolutions.
gmd.copernicus.org/preprints/gm...
gmd.copernicus.org/preprints/gm...
❓ Are you looking for a driven problem solver, who embraces novel challenges, and knows how to draw insights from terabyte-scale n-dimensional numerical data?
✅ If yes, hit me up with a message!
Find out more on LinkedIn: www.linkedin.com/posts/sasu-k...
#datascience #urbanclimate #meteorology
✅ If yes, hit me up with a message!
Find out more on LinkedIn: www.linkedin.com/posts/sasu-k...
#datascience #urbanclimate #meteorology
Sasu Karttunen on LinkedIn: CV, Sasu Karttunen, Nov 27, 2024
❓ Are you looking for a driven problem solver, who embraces novel challenges, and knows how to draw insights from terabyte-scale n-dimensional numerical…
www.linkedin.com
November 27, 2024 at 3:00 PM
❓ Are you looking for a driven problem solver, who embraces novel challenges, and knows how to draw insights from terabyte-scale n-dimensional numerical data?
✅ If yes, hit me up with a message!
Find out more on LinkedIn: www.linkedin.com/posts/sasu-k...
#datascience #urbanclimate #meteorology
✅ If yes, hit me up with a message!
Find out more on LinkedIn: www.linkedin.com/posts/sasu-k...
#datascience #urbanclimate #meteorology
✨I'm looking for a new job for 2025!✨
Job titles I'm interested in include scientist, data scientist, meteorologist, specialist and all their variations. My key skills are in data science, meteorology, model development and research.
More on LinkedIn: www.linkedin.com/posts/sasu-k...
Job titles I'm interested in include scientist, data scientist, meteorologist, specialist and all their variations. My key skills are in data science, meteorology, model development and research.
More on LinkedIn: www.linkedin.com/posts/sasu-k...
Sasu Karttunen on LinkedIn: CV of Sasu Karttunen (4 Oct 2024)
⭐ I'm open to new opportunities! ⭐
Some of the job titles I'm interested in include scientist, data scientist, meteorologist, specialist and all their…
www.linkedin.com
October 8, 2024 at 7:53 AM
✨I'm looking for a new job for 2025!✨
Job titles I'm interested in include scientist, data scientist, meteorologist, specialist and all their variations. My key skills are in data science, meteorology, model development and research.
More on LinkedIn: www.linkedin.com/posts/sasu-k...
Job titles I'm interested in include scientist, data scientist, meteorologist, specialist and all their variations. My key skills are in data science, meteorology, model development and research.
More on LinkedIn: www.linkedin.com/posts/sasu-k...
The energy balance closure of the model can be written like this. This represents all the flows of energy from or to the model and all the places where it can be stored within the model. The sum of all the flows and storages should be zero, i.e. the energy should be conserved.
December 5, 2023 at 4:07 PM
The energy balance closure of the model can be written like this. This represents all the flows of energy from or to the model and all the places where it can be stored within the model. The sum of all the flows and storages should be zero, i.e. the energy should be conserved.
After N hours (where N is far greater integer than I would be comfortable with) of debugging, my single-layer urban surface model for the PALM model system (a LES model, see palm.muk.uni-hannover.de) is 2 W/m^2 from full energy balance closure. So close!
December 5, 2023 at 4:02 PM
After N hours (where N is far greater integer than I would be comfortable with) of debugging, my single-layer urban surface model for the PALM model system (a LES model, see palm.muk.uni-hannover.de) is 2 W/m^2 from full energy balance closure. So close!
Mitään erikoista ei tapahtunut, mutta ennusteen epävarmuuden kommunikoinnissa medialle epäonnistuttiin jälleen. Oma henkilökohtainen mielipiteeni on, että Forecan blogikirjoitukset ovat nykyisellään huono lähde ja lähtökohta sääuutisointiin.
December 4, 2023 at 9:25 AM
Mitään erikoista ei tapahtunut, mutta ennusteen epävarmuuden kommunikoinnissa medialle epäonnistuttiin jälleen. Oma henkilökohtainen mielipiteeni on, että Forecan blogikirjoitukset ovat nykyisellään huono lähde ja lähtökohta sääuutisointiin.
Recently, there hasn't been much social media friendly stuff to post on my work as I've been implementing the remaining technical aspects and fixing bugs of my single-layer urban surface model implementation for the LES model PALM. Now I'm finally able proceed to sensitivity testing & evaluation!
December 1, 2023 at 11:33 AM
Recently, there hasn't been much social media friendly stuff to post on my work as I've been implementing the remaining technical aspects and fixing bugs of my single-layer urban surface model implementation for the LES model PALM. Now I'm finally able proceed to sensitivity testing & evaluation!