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Rachel O'Brien

@reobrien.bsky.social
2.5K followers 615 following 809 posts

Environmental Engineer, Atmospheric Chemist, Assistant Professor at the University of Michigan. they/she. Opinions are my own.🌈

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Reposted by Rachel O'Brien
Canadian Paintings @canadianpaintings.bsky.social · 29/09/2026
Autumn Drama Dana Irving 2023
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Rachel O'Brien @reobrien.bsky.social · 28/09/2026
I like that there are no adds here on Bluesky. It feels like one of the last parts of the internet where no one is trying to sell me things.
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Max Kozlov @maxkozlov.bsky.social · 25/09/2026
SCOOP: Top researchers at Columbia, Stanford, and others thought they were elected to elite scientific societies alongside Nobel laureates. The catch? The organizations are a sham. I spent the last month diving deep into a massive academic scam spanning continents, for @nature.com
nature.com
Exclusive: Sham scientific societies are misleading star researchers
A Nature investigation reveals a network of organizations that have been building their ranks through deceptive practices.
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Lamont-Doherty Earth Observatory @lamont.columbia.edu · 21/09/2026
Artist Selva Ozelli, whose exhibit Flags of Science CCL is on display as part of Art Meets Science at Lamont, has recently interviewed several of our amazing scientists, including Fola Kolawole, Sheean Haley, @roseatmos.bsky.social, Mike Steckler, Margie Turrin! Via TRVST: bit.ly/4hDkFrA
Fola Kolawole mapping large earthquake rupturing faults in the East African Rift Valley system. Courtesy of Folarin KolawoleRóisín Commane on a specialized aircraft to collect data on background trace gases across global oceans. Courtesy of Róisín CommaneMike Steckler and team disembarking into thick mud at low tide in the Sundarbans Mangrove Forest in Bangladesh, 2022. Courtesy of Mike StecklerMargie Turrin with students at the Lamont-Doherty Hudson River Field Station examining creatures in their seining net. Courtesy of Margie Turrin
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Terence Tao @teorth.bsky.social · 11/09/2026
A group of 25 Fields Medalists, including myself, have made a joint declaration on Math and AI: mathandai.org . We welcome additional signatories. See also this article in the Economist announcing the declaration: www.economist.com/science-and-...
mathandai.org
Declaration — Math and AI
Read the declaration and add your name.
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Colette Heald @coletteheald.bsky.social · 18/09/2026
We are looking for a new PhD student to join our group in 2027! Interested in all the ways that oxidized nitrogen cycles in the atmosphere and affects air quality and climate? So are we! Details and link to apply are here: jobs.ethz.ch/job/view/JOP...
jobs.ethz.ch
PhD Position in Atmospheric Chemistry
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David Ho @davidho.bsky.social · 08/09/2026
🧵CO₂ removal (CDR) is back in the news, but just because the UNEP report says we need CDR, it doesn't mean we'll have CDR. Many challenges will take decades of research and negotiation to solve. Here are some examples: Technological: We currently don't have any durable CDR method that scales.
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Rachel O'Brien @reobrien.bsky.social · 13/09/2026
Real Greek yogurt is amazing.
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Rachel O'Brien @reobrien.bsky.social · 11/09/2026
I'm in Crete for IGAC 2026 and I love that one of my favorite pieces of wall art that I saw on the walk to the conference center is a reproduction of an ancient fresco from the palace of Knossos!
Wall art in HerkaklionMinoan wall painting "Ladies in Blue"
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Rachel O'Brien @reobrien.bsky.social · 08/09/2026
Having a wonderful time at iCACGP-IGAC 2026 in Crete! The talks and posters have been great and I got up early enough to catch a mermaid sunrise!
Mermaid art on a pier in Crete
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AtmChemAerosolJobs @atmchemaerojobs.bsky.social · 04/09/2026
Postdoctoral associate on indoor atmospheric chemistry, MIT Department of Civil and Environmental Engineering, on assessing the efficacy and impacts of commercial air cleaners. careers.peopleclick.com/careerscp/cl...
careers.peopleclick.com
Postdoctoral Associate
MIT - Postdoctoral Associate - Cambridge MA 02139
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Rachel O'Brien @reobrien.bsky.social · 03/09/2026
We had a tornado warning today at the start of my class. My room is the shelter for the building, so I ended up lecturing to ~300 students, faculty, and staff. Crazy first day!
static.klipy.com
Judy Garland as Dorothy in The Wizard of Oz
Alt: Judy Garland as Dorothy in The Wizard of Oz
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Andre the Chemist @andrechemist.bsky.social · 02/09/2026
Proposal: chemists should do these kind of press releases for experiments with uncertain/unconfirmed results just like physicists do "BREAKING: The the Chemist group might have done a catalysis. More research needed to confirm." [narrator: they just misinterpreted the NMR spectrum... again]
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🇺🇸𝕀𝕟𝕕𝕪 ℝ𝕖𝕗𝕦𝕘𝕖𝕖🇺🇸 ᵀʳᵘᵐᵖˡᵉˢˢ ᵁˢᴬ @indyrefugee.bsky.social · 30/08/2026
Millions of people rely on the information they obtain via a search engine corporation which just proved it would alter digital reality if instructed to do so by those in political power. That’s some crazy shit, Google.
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Rachel O'Brien @reobrien.bsky.social · 30/08/2026
I don't know what I did, but this should happen more often!
Error message saying "can't generate an AI overview right now. Try again later.
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Ann Marie Carlton @amgcarlton.bsky.social · 28/08/2026
My research group is looking to hire a postdoctoral scholar. Come work with us. I've listed details on my site: annmariecarlton.com/postdoctoral...
recruit.ap.uci.edu
Postdoctoral Scholars - Open Ranks 2026-27
University of California, Irvine is hiring. Apply now!
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Rachel O'Brien @reobrien.bsky.social · 27/08/2026
I love fuzzy bees with their faces buried in flowers.
Bumblebee with her face in an orange flower.
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Ann Marie Carlton @amgcarlton.bsky.social · 25/08/2026
Dolly Parton was a national treasure. She was an inspiration to so many. Quite simply I will always love you, Dolly. Rest in peace.
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Katie Mack @astrokatie.com · 23/08/2026
So many of these folks are like “ooo we’re daring free-thinking mavericks” and it’s like nah man you’re just super racist
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Rachel O'Brien @reobrien.bsky.social · 23/08/2026
Beautiful fluffy Goldfinch grabbing her breakfast.
Goldfinch on a dead flower eating breakfast.
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Rachel O'Brien @reobrien.bsky.social · 23/08/2026
Here's a duck from last winter on ice at the botanical garden. The shadows make him look like he's levitating. #BirdOfTheDay theme is #Simple.
Male duck on ice standing on one leg.
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Canadian Paintings @canadianpaintings.bsky.social · 17/08/2026
Summer Rush Katharine Burns 2025
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Kate Clancy @kateclancy.bsky.social · 23/08/2026
Struck by the percentage of people signing on who are men, if guessing by names means anything (90% plus?). Also the percentage who are losers (1000% at least).
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Rachel O'Brien @reobrien.bsky.social · 21/08/2026
I have taken many pictures of perfect butterflies. The older ones are even more beautiful and impressive.
Older Monarch butterfly with a torn wing on a tree.
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Paul Wennberg @paulowennberg.bsky.social · 20/08/2026
“Evidence keeps accumulating that LLMs are a powerfully useful technology for people who already know what they're talking about, and a dangerous outsourcing of cognitive function for people who don't.”
doomsdayscenario.co
AI is making everything worse
The political problem isn't the data centers — it's that AI is a turd mountain looming over daily life.
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Rachel O'Brien @reobrien.bsky.social · 19/08/2026
So much of the content online is now clearly written by AI. It's exhausting. Why do so many people think AI vomit is worth anything?
static.klipy.com
Child's Monday Feels on Spinning Carousel
Alt: Child holding onto carousel and being dragged on the floor.
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Rachel O'Brien @reobrien.bsky.social · 18/08/2026
I really like the design of the towers at EPA field sites. It's very easy to access the filter and you also get good height for sampling.
Tower at EPA field site for sampling ozone.
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Rachel O'Brien @reobrien.bsky.social · 18/08/2026
So many fun butterflies! I love how you can see how fuzzy they are. I usually think of butterflies as having smooth bodies and wings, but you can see the fuzziness of these.
Silver-spotted Skipper on a purple flower. Painted Lady butterfly on a purple flower.Cabbage White butterfly on a purple flower.
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Ankur Desai @profdesai.bsky.social · 17/08/2026
During my 5-year term as chair of @uwmad-aos.bsky.social that ended last week, I collected thoughts and advice for new department chairs and leaders. The first full draft is now online, feel free to read/share/comment! flux.aos.wisc.edu/how-to-chair
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Rachel O'Brien @reobrien.bsky.social · 14/08/2026
It is frustrating to see a conference in your field with only one woman out of 10 as a plenary speaker and only 5 out of 26 as keynote speakers.
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Rachel O'Brien @reobrien.bsky.social · 13/08/2026
Amazing, so true: imgs.xkcd.com/comics/poten...
"The bunch of disadvantaged kids I was tutoring became too good at writing, and their essays were forcing me to confront painful existential questions, so l started trying to turn them on to drugs and crime instead."
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Lyssa Freese @lfreese.bsky.social · 13/08/2026
I am hiring a postdoc to join my group at UC Irvine's Department of Earth System Science to work on rapid response modeling of air quality and health impacts of energy policy! You can learn more about the position and apply here: recruit.ap.uci.edu/JPF10361
recruit.ap.uci.edu
Postdoctoral Scholar - Climate, Pollution, and Solutions
University of California, Irvine is hiring. Apply now!
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Paul Wennberg @paulowennberg.bsky.social · 13/08/2026
@acs.org Early Career Postdoctoral-Faculty Bridge Grant for postdoctoral researchers and new faculty members. Awardees may receive up to $125,000 to support a postdoctoral fellow or associate for two years.
app.connect.discoveracs.org
Funding available for early-career and faculty researchers in sustainability
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Faye McNeill @vfmcneill.bsky.social · 13/08/2026
If there's one thing about me, I'll always reskeet a volcanopost
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Rachel O'Brien @reobrien.bsky.social · 10/08/2026
I was just thinking today about how difficult things are and how much waste and pain and loss we have all been experiencing over the last couple of years. I want to give a big thank you to every senior leader/mentor/advisor etc. who is helping everyone get through the mess that is being created.
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Jacob T. Levy @jacobtlevy.bsky.social · 09/08/2026
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Rachel O'Brien @reobrien.bsky.social · 08/08/2026
I saw my first hummingbird moth! They are so cool!
Hummingbird moth over a purple flower. Hummingbird moth sipping from a flower.
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Jeff Berardelli @weatherprof.bsky.social · 08/08/2026
Endless Dust dominates the Atlantic! It’s exactly what you want to see in #Hurricane Season… 1000’s of miles of Saharan #Dust blanketing the basin. Dusty skies will arrive in #Florida midweek and stick around through next weekend. The good news: 1/
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Stephen Hopkins @phil-lol-ogist.bsky.social · 07/08/2026
Parents Parents 2026 BCE 2026 CE 🤝 "These kids and their damned tablets"
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Rachel O'Brien @reobrien.bsky.social · 07/08/2026
This was so cool, I can't believe he caught that with his shirt! m.youtube.com/watch?v=jvMM...
m.youtube.com
Highlights: Mariners pitcher catches 108 mph line drive in his shirt
YouTube video by NBC Bay Area
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Rachel O'Brien @reobrien.bsky.social · 04/08/2026
Super proud of all my students this summer! Justin and Willow are two great undergrads who presented their summer research during the SURE symposium last week.
Justin presenting his work on chamber development for QAC heterogeneous oxidation.Willow presenting her work looking at FIREX data with the AMS functional group method.
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Rachel O'Brien @reobrien.bsky.social · 24/07/2026
We have a new visitor to our garden! It is amazing how gently it can glide over the flowers.
Eastern Tiger Swallowtail on a pink flowerEastern Tiger Swallowtail on a pink flower, side view
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Rachel O'Brien @reobrien.bsky.social · 19/07/2026
Stop Scrolling and post two characters who bring you happiness
Mila Kunis and Kate McKinnon in "The Spy who Dumped Me". This is a screenshot of them crawling through the restaurant.
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Rachel O'Brien @reobrien.bsky.social · 17/07/2026
I hope the bees are doing ok with all the smoke up here. This is from the weekend, I see far fewer outside right now.
Bumblebee on a purple flowerBumblebee on a flower
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Rachel O'Brien @reobrien.bsky.social · 15/07/2026
#AGU26 A098 - Organic Gases, Aerosols, and Surface Chemistry: Sources, Transformations, and Human Exposure Across Outdoor and Indoor Environments Submit an abstract by August 5th! agu.confex.com/agu/agu26/pr...
agu.confex.com
Organic Gases, Aerosols, and Surface Chemistry: Sources, Transformations, and Human Exposure Across Outdoor and Indoor Environments
Air chemistry research has advanced along separate tracks for outdoor and indoor environments, yet the processes governing human exposure span both. Organic gases and aerosols cross the indoor-outdoor...
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Rachel O'Brien @reobrien.bsky.social · 12/07/2026
I love the color gradient in red Daylilies.
Red Daylily
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Rachel O'Brien @reobrien.bsky.social · 10/07/2026
I'm very happy to share a new special issue in ES&T Air. "Indoor Air Chemistry in the Context of a Changing Climate" is now available: tinyurl.com/58yz7a5u This special issue was led by myself, Nicola Carslaw, and Yingjun Liu and we'd like to thank all the authors and reviewers who contributed!
Cover for this special issue.
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Dylan B. Millet @dbm.bsky.social · 09/07/2026
Bump! Priority deadline July 15 🧪
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Budd @n7eoj.bsky.social · 08/07/2026
It has been criminally underreported but Kelsey Pfendler has just rowed solo across the Pacific Ocean from the US coast to Hawaii in record time. A 2,400-mile unsupported journey in 43 days, 17 hours, and 55 minutes. Notably beating the Men’s record by 9 whole days.
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