Mikael Ehn
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mikaelehn.bsky.social
Mikael Ehn
@mikaelehn.bsky.social
420 followers 150 following 13 posts

Professor in Atmospheric Physical Chemistry, University of Helsinki.
Not an active poster, but hoping this will be the new place to discover what other scientists are doing.

Videos
Environmental science 44%
Geology 20%
Posts Replies Media Videos

Reposted by Joel A. Thornton

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · 29d
Before you start getting distracted by the holiday season, plan for 2026 by noting that we are again convening this session on atmospheric organics at #EGU26.
coletteheald.bsky.social Colette Heald @coletteheald.bsky.social · Nov 19
If you work on sources and impacts of VOCs (biogenic or anthropogenic) from measurement to modeling perspectives please submit an abstract to our atmospheric organics session at #EGU26! Our invited speakers are @dbm.bsky.social and @jacquirickard.bsky.social See you in Vienna! tinyurl.com/55vda8u7
Session AS3.2
meetingorganizer.copernicus.org

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Nov 26
Over the last years I have shifted efforts towards the coastal environment, working together with ecologists and biogeochemists. Has been really exciting to learn new things, and now we even have a first publication out describing the atmospheric observations we have set up at our coastal station.
coastclim.bsky.social CoastClim @coastclim.bsky.social · Nov 26
🚨New publication
Thakur et al present the comprehensive atmospheric observatory @tvarminne.bsky.social.

Initial results: sea-air exchange of aerosol precursor gases, VOCs and CO2 at the coast are highly dynamic, influenced by meteorological and biological conditions.

hdl.handle.net/10138/602793

Reposted by Mikael Ehn

coastclim.bsky.social
CoastClim @coastclim.bsky.social · Nov 26
🚨New publication
Thakur et al present the comprehensive atmospheric observatory @tvarminne.bsky.social.

Initial results: sea-air exchange of aerosol precursor gases, VOCs and CO2 at the coast are highly dynamic, influenced by meteorological and biological conditions.

hdl.handle.net/10138/602793

Reposted by Joel A. Thornton, Mikael Ehn, Dylan B. Millet , and 2 more

coletteheald.bsky.social
Colette Heald @coletteheald.bsky.social · Nov 19
If you work on sources and impacts of VOCs (biogenic or anthropogenic) from measurement to modeling perspectives please submit an abstract to our atmospheric organics session at #EGU26! Our invited speakers are @dbm.bsky.social and @jacquirickard.bsky.social See you in Vienna! tinyurl.com/55vda8u7
Session AS3.2
meetingorganizer.copernicus.org

Reposted by Robbert Sanderman, Mikael Ehn, Seema Jayachandran , and 14 more

heimbergecon.bsky.social
Philipp Heimberger @heimbergecon.bsky.social · Nov 18
"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."

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Sep 30
This work started already pre-covid, which makes me even happier to see it finally in print. Thanks to @ayanezserrano.bsky.social for tremendous leadership in pushing it all the way through!

Reposted by Mikael Ehn

ayanezserrano.bsky.social
Ana María Yáñez Serrano @ayanezserrano.bsky.social · Sep 26
Happy to announce that our paper on "Unaccounted impacts of diterpene emissions on atmospheric aerosol loadings" has been published after years of efforts. Thank you!@mikaelehn.bsky.social @jpreixach.bsky.social @olgagarmash.bsky.social @apraplan.bsky.social @heidihellen.bsky.social
rdcu.be/ezAYI
Unaccounted impacts of diterpene emissions on atmospheric aerosol loadings
Communications Earth & Environment - Diterpenes are an underestimated source of secondary organic aerosol, accounting for up to 13% of the secondary organic aerosol burden from isoprene,...
rdcu.be

Reposted by Mikael Ehn

chemdelphine.bsky.social
Delphine Farmer @chemdelphine.bsky.social · Sep 21
A rare bloom of Cosmo, CSU’s corpse plant, gave my group (Rose Rossell and @chemj.bsky.social) the chance to study corpse flower emissions in a fun collaboration with Tofwerk. Turns out to be an interesting, if stinky, story of pollination chemistry…
How a corpse plant makes its terrible smell − it has a strategy, and its female flowers do most of the work
When a corpse flower bloomed on campus, atmospheric scientists got to work. What they discovered provides new evidence about the unique pollination strategies of a very unusual flower.
theconversation.com

Reposted by Mikael Ehn

coletteheald.bsky.social
Colette Heald @coletteheald.bsky.social · Apr 23
I'm looking forward to EGU next week and seeing people - who will be there? If interested in Atmospheric Organics check out our oral session on Thursday and posters Friday morning (AS3.2). meetingorganizer.copernicus.org/EGU25/sessio...
You can also find Yumin and Flossie presenting on their work:
Session AS3.2
meetingorganizer.copernicus.org

Reposted by Mikael Ehn, Jurgita Ovadnevaitė

maceheadccaps.bsky.social
Mace_Head @maceheadccaps.bsky.social · Jun 4
In the middle of hosting two amazing field campaigns! **COAST-VOC** (www.helsinki.fi/en/researchg...) and **CARES**: (nerccares.wordpress.com)
Science in action at the land-sea-atmosphere interface! 🌿 @ovadnevaite.bsky.social
#COASTVOC #CARES #ClimateScience #AtmosChem

Reposted by Mikael Ehn

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Jun 7
Det är dags för Finland och Sverige att ta FNs havskonferens på allvar! @tvarminne.bsky.social @ostersjocentrum.bsky.social @coastclim.bsky.social @balticseacentre.bsky.social @helsinki.fi
www.hbl.fi/2025-06-07/f...
DEBATT: Finland och Sverige måste sätta ett friskt hav främst
Ekologisk hållbarhet är en förutsättning för ekonomiska och sociala värden i haven, skriver Alf Norkko och Christoph…
www.hbl.fi

Reposted by Camilla Gustafsson

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Jun 5
Sad I didn't manage to go to there myself this time, but thanks to Mace Head team for hosting these campaigns!
maceheadccaps.bsky.social Mace_Head @maceheadccaps.bsky.social · Jun 4
In the middle of hosting two amazing field campaigns! **COAST-VOC** (www.helsinki.fi/en/researchg...) and **CARES**: (nerccares.wordpress.com)
Science in action at the land-sea-atmosphere interface! 🌿 @ovadnevaite.bsky.social
#COASTVOC #CARES #ClimateScience #AtmosChem

Reposted by Mikael Ehn, Colette L. Heald

atmostaj.bsky.social
Joel Thornton @atmostaj.bsky.social · May 15
There is some "amazing stuff" in here on Climeworks and carbon capture / carbon offsets model more generally.
brief🧵 after the caveat that I have no idea if what is reported is true (but it mostly doesn't matter whether/if the numbers are off by >10x)
Climeworks’ capture fails to cover its own emissions
The carbon capture company Climeworks only captures a fraction of the CO2 it promises its machines can capture. The company is failing to carbon offset the emissions resulting from its operations – wh...
heimildin.is

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Apr 23
EGU coming up next week! See below for details on our session on atmospheric organics. Hope to see many of you there!
coletteheald.bsky.social Colette Heald @coletteheald.bsky.social · Apr 23
I'm looking forward to EGU next week and seeing people - who will be there? If interested in Atmospheric Organics check out our oral session on Thursday and posters Friday morning (AS3.2). meetingorganizer.copernicus.org/EGU25/sessio...
You can also find Yumin and Flossie presenting on their work:
Session AS3.2
meetingorganizer.copernicus.org

Reposted by Mikael Ehn, Annele Virtanen

natgeosci.nature.com
Nature Geoscience @natgeosci.nature.com · Apr 3
⚒️ Article: High sensitivity of cloud formation to aerosol changes

@annelev.bsky.social @harrikokkola.bsky.social

www.nature.com/articles/s41...
High sensitivity of cloud formation to aerosol changes - Nature Geoscience
In situ observations indicate a greater susceptibility of cloud droplet number to cloud condensation nuclei than is estimated from satellite observations, which suggests that aerosols exert a stronger...
www.nature.com

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Mar 22
Oma kokemus: ChatGPT sanoi osaavansa kääntää MatLab-scriptin Igor-koodiksi. Generoi testipätkästä ihan kivannäköisen koodin. Tarkemmin tarkasteltuna siellä oli kuitenkin paljon virheitä. Jopa for-loopin syntaxi pielessä. R ja Python varmaan AI:lle helpompia, mutta kannattaa aina tarkistaa tulos.

Reposted by Alberto Montanari, Ross Woods, Mikael Ehn , and 1 more

egu.eu
European Geosciences Union (EGU) @egu.eu · Mar 3
Hello Bluesky! EGU is pleased to be able to activate our account here, and share all the exciting news about the upcoming General Assembly: #EGU25, our #OpenAccess publications and more! Several of our Divisions will be making the move over from Twitter/X too, so keep an eye out for your favourites!
Blue background with yellow EGU logo and text that reads "European Geosciences Union".

Reposted by Mikael Ehn

coletteheald.bsky.social
Colette Heald @coletteheald.bsky.social · Nov 11
Starting to think about conference plans for 2025? Interested in atmospheric organics? Consider submitting an abstract to our session at EGU! @mikaelehn.bsky.social
meetingorganizer.copernicus.org/EGU25/sessio...
Session AS3.2
meetingorganizer.copernicus.org

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Dec 17
Maybe they want to convey that there's still plenty of room for things to get much worse...?

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Nov 12
EGU 2025 coming up next spring, check out our session on atmospheric organics!
coletteheald.bsky.social Colette Heald @coletteheald.bsky.social · Nov 11
Starting to think about conference plans for 2025? Interested in atmospheric organics? Consider submitting an abstract to our session at EGU! @mikaelehn.bsky.social
meetingorganizer.copernicus.org/EGU25/sessio...
Session AS3.2
meetingorganizer.copernicus.org

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Mar 21
My postdoc Jian Zhao did a great job in figuring out how to improve the performance of the vaporization inlet for aerosols (VIA). One of these days we need to do a direct comparison with the EESI-TOF to compare spectra and sensitivities for online detection of SOA.
Characterization of the Vaporization Inlet for Aerosols (VIA) for online measurements of particulate highly oxygenated organic molecules (HOMs)
Abstract. Particulate matter has major climate and health impacts, and it is therefore of utmost importance to be able to measure the composition of these particles to gain insights into their sources...
amt.copernicus.org

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Mar 12
Can we, in real-time, deduce the ozone formation regime by measuring highly oxygenated organics (HOM)? In theory, yes. In a simple lab system, yes. In ambient air, we are still looking into it. In any case, since HOM were discovered, we have thought about these links, so was nice to now test it.
On the potential use of highly oxygenated organic molecules (HOMs) as indicators for ozone formation sensitivity
Abstract. Ozone (O3), an important and ubiquitous trace gas, protects lives from harmful solar ultraviolet (UV) radiation in the stratosphere but is toxic to living organisms in the troposphere. Addit...
acp.copernicus.org

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Jan 18
Finally I can identify with your posts! 🙁

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Jan 16
I cannot identify with a single thing you said in this post! 🙂

mikaelehn.bsky.social
Mikael Ehn @mikaelehn.bsky.social · Jan 9
I hadn't checked X for quite a while. Following your post I now did, and finally made the choice to completely deactivate my account there.

Reposted by Mikael Ehn

coletteheald.bsky.social
Colette Heald @coletteheald.bsky.social · Dec 18
Now that AGU has wrapped up, time to start thinking about EGU in April! Abstracts are due Jan 10. Consider submitting to our session on organics:
meetingorganizer.copernicus.org/EGU24/sessio...

Reposted by Mikael Ehn

paulowennberg.bsky.social
Paul Wennberg @paulowennberg.bsky.social · Dec 3
pubs.acs.org/doi/full/10....
Let’s Abandon the “High NOx” and “Low NOx” Terminology
pubs.acs.org

Reposted by Mikael Ehn

coletteheald.bsky.social
Colette Heald @coletteheald.bsky.social · Nov 3
If you are interested in atmospheric organics and conferences in Vienna, please consider submitting an abstract to our session at EGU24!
meetingorganizer.copernicus.org/EGU24/sessio...