Atmospheric Physics faculty position at Univ of Toronto - help us make use of satellite and aircraft capabilities that are on their way in Canada! jobs.utoronto.ca/job/Toronto-...

Welcome to CU Boulder, Ellen Considine. We are so lucky to have you as a colleague and I look forward to possible collaborations. cires.colorado.edu/news/new-sem...

Just watched the powerful new PBS documentary “Clearing the Air: the War on Smog”. My colleague Ellie Browne acted as Science Advisor. Very proud of her! www.pbs.org/wgbh/america...

Tragic. This is how heat deaths are occurring in Arizona and elsewhere. www.theguardian.com/us-news/2025...

In other important news... cubuffs.com/news/2025/8/...

It was a pleasure to work with Fionna Samuels on this article about the air quality index, VOCs and the impacts of urban fires. cen.acs.org/environment/...

Alex Bradley in our group did a wonderful job with this analysis of air pollution disparities in Denver and the underlying, historical reasons. Alex discusses all the pivotal moments in Denver's history that have shaped the distribution of today's air pollution sources. doi.org/10.1080/2325...

Where is everybody? Must have picked the wrong year…

New audio 🔊 story campaign — Voices of CIRES! First up, CIRES Fellow & @colorado.edu Professor Joost de Gouw @gouwlab.bsky.social: buff.ly/2AowWlb "Of all the research dollars that I get, 80% of that goes through student salaries, and if I don't get that, I cannot offer projects to students..."

I enjoyed working on this piece for Voices of CIRES and think it came out really well. on.soundcloud.com/T9uMt1CyffGq...

Terrible Friday news dump.The wealth of expertise. The decades of scientific progress. The emerging and urgent challenges we were focused on tackling. It is all so short-sided and cruel. www.nytimes.com/2025/07/18/c...

Fireworks are beautiful, but the air pollution in their aftermath is not. Not only is PM2.5 strongly elevated afterwards, but it contains several heavy metals that give all the nice colors. Kudos to the Boulder Reporting Lab for highlighting this issue. boulderreportinglab.org/2025/07/08/b...

Well said Dennis!

Our groups participated in the International Congress On Far-UVC Science And Technology in Boulder this week. I was honored to present as one of the plenary speakers. Kudos to Madison Rutherford and Rebecca Mesburis for giving excellent presentations about their work. www.iuva.org/icfust-2025

#Fire — In 2024 and 2025, CIRES researchers learned: 🚒 Fires are getting faster, more destructive in the Western US 🔥 Fewer fires burn today (and that’s bad) 🏠 Post-fire pollutants linger indoors 🌟 And more! Read more in CIRES' Spheres Magazine: cires.colorado.edu/spheres-maga...

I also enjoyed talking about air quality in the Front Range to a group of teachers as part of this workshop: ceee.colorado.edu/index.php/ev.... @ciresceee.bsky.social does such a great job with these.

Feeling depressed about the state of science in the U.S.? The best solution remains to talk to the next generation of students. I had the privilege to discuss my work with students in this REU program: www.colorado.edu/mse/academic.... So many good and thoughtful questions! We’ll be okay.

Write a McClintock Letter w @cornellasap.bsky.social - an op-ed in your hometown newspaper that tells your science story & advocates for federal research funding. The goal is to publish ~6/16 (McClintock’s bday). I’m writing one, I'm super pumped! Sign up here: blogs.cornell.edu/asap/events-...

Such a loss….

Dark clouds over our laboratory.

This summer we are participating in an indoor air study focused on the effects of cleaning and air cleaners. The TV news already came by: www.denver7.com/news/front-r...

Beautiful day in Boulder. A high cloud deck and temps in the 60s make for perfect hiking weather!

More photos from last week’s graduation! Congrats again to Emmy and Alex.

Our Institute’s annual science day, the CIRES Rendezvous, may have had no lunch this year, but the turnout was possibly even higher than normal. Very good to see everyone.

Congratulations to Emmy Longnecker and Alex Bradley who received their PhD diplomas yesterday.

Hail, all hail our Alma Mater! Ever will our hearts be true; You will live with us forever, Loyal we will be to you. We will sing forever your praises, Ever more our love renew, Pledge our whole devotion to you, Dear old CU!! Go #ForeverBuffs to the CU Boulder Class of 2025! 📷:Glenn Asakawa

It's a bit rainy today, but we are hoping for a beautiful Colorado morning to celebrate our soon-to-be #ForeverBuffs at the 2025 commencement ceremony tomorrow, Thursday, May 8, 8:30 a.m. MDT! Photo: Glenn Asakawa

With reductions in funding, it would be nice to see a trend towards more collaboration and less focus on individual projects for junior faculty. We put a lot of weight on that for tenure, but intellectual contributions and leadership can be more nuanced than that.

FYI: The Spencer Foundation, Kapor Foundation, The William T. Grant Foundation, and the Alfred P. Sloan Foundation have collaborated to offer $25K rapid response grants. "This rapid response bridge funding opportunity is for scholars and teams whose grants have recently been cancelled by NSF."

A student from our group is collecting air samples at one of the biggest trash cans in the world. Our students are so motivated that they are literally willing to study what happens to our trash. That makes it all the more exasperating that the EPA just terminated the grant that supports this work.

I will be part of a panel on the LA Fires during this open session of the NASEM Board on Atmospheric Science and Climate. May 5 and 6. Registration is now open. www.nationalacademies.org/event/44902_...

Thanks to the crew at the Laughing Goat Coffee on campus. I needed this in more ways than you can imagine.

I just heard the disappointing news that a @nationalacademies.org study on far UV to reduce transmission of respiratory infections was canceled. www.nationalacademies.org/our-work/cli... /1

Alex Bradley and Nathan Sweet were presenting today at the AQ Buffs Symposium organized by students in the Environmental Engineering Program at CU Boulder.

I first travelled to the US on April 17, 1994; exactly 31 years ago. It's incredible how fast time moves. I was a freshly minted PhD on my way to a postdoc in Boulder. I knew nothing about Colorado. I assumed I was going to stay 1-2 years, but am still here and haven't regretted it; still don't.

It was my pleasure and honor to be a plenary speaker at the National Air Toxics Conference that is being held in Denver this week. I spoke about urban fires and the need to do more research on the toxics released from those fires, and the cleaning of homes.

A new paper from our group uses machine learning to make a seasonal correction to TROPOMI methane data over Colorado. A future paper will use this correction and other retrievals to study methane emissions from oil and gas production. The work was funded by CDPHE. doi.org/10.5194/amt-18-1675-2025

Group Leader in Experimental Atmospheric Chemistry at ETH Zurich: eddy flux measurement capacity for reactive trace gases and/or particles, and participate in teaching activities at ETH, primarily as the lead instructor for a Field Course in Atmospheric Chemistry. jobs.ethz.ch/job/view/JOP...

Just a photo from the Flatirons in Boulder to cleanse your timeline.

And this afternoon Emmy Longnecker successfully defended her PhD thesis on vapor pressure calculations and the formation of films on indoor surfaces. Congrats to Emmy!

This morning Alex Bradley successfully defended his PhD thesis on Denver air quality, methane in Colorado and electric power generation in an era of expanding renewables. Congrats Dr. Bradley!

Our group has a busy week coming up. Madison Rutherford got things started today by presenting her third-year talk. She talked about the effects of GUV on indoor air, and VOC emissions from industry and from landfills in Colorado. Two PhD defenses will follow on Wednesday.

Good article in Science on the post-fire impacts from the LA fires, with a brief appearance of myself. Good work by Warren Cornwall. www.science.org/content/arti...

I am very sorry to see this. Stan was an excellent scientist. I saw him last Fall and he was talking with such enthusiasm about JPL’s measurements of methane in LA.

Some personal news: my department elected me last week to become its next Chair. My term will start July 1. I am honored and daunted.

CSL is a NOAA lab that has been foundational in atmospheric chemistry & air quality science. They are now losing young scientists that are among the best/brightest of the next generation. This degrades not just CSL but our ability to track pollution & protect health. csl.noaa.gov

Great to see the support from the Boulder community for the science and scientists in our Federal laboratories.

Former Congressman and NOAA building namesake David Skaggs is leading a demonstration outside the NOAA-NIST campus in Boulder on Monday, March 3, at 11:45. OP: www.facebook.com/share/p/18Kg...

We are hiring for a Senior Climate Scientist at @ucsusa.bsky.social. Join us! apply.workable.com/union-of-con...