Red tulip in the rain

Red and white tulip in the rain

Peach colored tulip in the rain

Yellow tulip in the rain

A brief break in the rain let me grab some photos. I love how the droplets look on the petals of the tulips.

Pale orange tulip with the sun shining

Yello tulip

Red tulip

Pale orange tulip

I love the colors you get when sunlight passes through tulip petals! 🌷

John Seinfeld─The Atmospheric Engineer Who Cleared the Air John Seinfeld is one of the most important and influential atmospheric scientists and engineers of the last 60 years. As a young chemical engineering professor, who had just defended his thesis on the...

doi.org/10.1021/acse...

Thorough retrospective and touching tribute by John's long time collaborator, Rick Flagan (H/T @ryanward.bsky.social)

The capsule splashing down onto the water with the three red and white parachutes above it

Splashdown! Vehicle is stable and upright. “A perfect bulls-eye splash for Integrity and its four astronauts!” #Artemis

Watch Secrets of the Bees TV Show - Streaming Online | Nat Geo TV Watch full episodes of Secrets of the Bees online. Get sneak peeks and free episodes all on Nat Geo TV.

The Secret Life of Bees is really great!

www.nationalgeographic.com/tv/show/9980...

Published today, the atmospheric chemistry community and ACS ES&T Air celebrate the important scientific contributions of John H. Seinfeld to atmospheric and aerosol science through this Special Issue dedicated to his legacy.

pubs.acs.org/toc/aeacd5/3/4

Priority application deadline is April 20! 🧪
#ChemSky

Daydream
Katharine Burns
2025

Atmospheric Chemistry Insights from the Global COVID-19 Pandemic: A Review The COVID-19 pandemic and resulting reductions in worldwide emissions, associated primarily with the transport sector, provided an unprecedented opportunity to explore the response of atmospheric chemistry and composition to large anthropogenic emissions perturbations. While air quality generally improved in early 2020, this was tempered by increased formation of secondary pollutants (e.g., O3 and secondary particulate matter, PM) in many regions studied. Declines in NOx emissions were largely responsible for the changes in O3, driving decreases in O3 concentrations in remote regions and increases in urban regions due to both decreases in O3 titration by NOx and also nonlinear changes in O3 production. Lower NOx levels also increased the levels of other oxidants (e.g., OH and O3), leading to a general increase in atmospheric oxidation in polluted urban regions. This enhanced oxidation promoted additional PM formation in some regions but was generally outweighed by decreases in primary PM and other secondary precursors (SO2 and VOCs). The COVID-19 pandemic gave rise to large local perturbations in air quality but only modest reductions in the global abundance of short-lived climate forcers (including O3 and PM).

Delighted to share that our review on what the COVID-19 lockdowns revealed about atmospheric chemistry was published today. What fun to write papers with wonderful colleague/friends! @jessekroll.bsky.social @envchemjen.bsky.social @chemdelphine.bsky.social

pubs.acs.org/doi/10.1021/...

Hellebore in the garden. The flower is white with pretty pink spots.

A couple of purple crocuses.

A yellow daffodil bud just about to open.

A baby purple hyacinth.

Early spring flowers are so beautiful and such a welcome sight!

AAAR: The American Association for Aerosol Research just announced their annual call for nominations: www.aaar.org/awards/annua...
Please consider nominating a deserving scientist & please forward widely to your networks.

WIRECUTTER Microplastics Are Everywhere. Here's How to Avoid Eating Them.

Ok step one is to make them look less delicious

A Message from Your University President on the Recent Hippopotamus Attacks “Your steadfast commitment to our strategic mission, despite the multiple tramplings, maulings, and other encounters we shall henceforth refer to as ‘termina...

Funny and a bit too familiar 😂

www.mcsweeneys.net/articles/a-m...

These are some of my favorite birds!!

I emailed my senator about this and was dumb and used my work email and had to register as a federal lobbyist. Reminder to send from personal email!!

Big congrats!!!

>10,000 STEM PhDs have left federal service over the past year (including 30% of the federal colleagues with whom I’ve worked closely). Those still left are holding federal science together with duct tape.

What an extraordinary act of sabotage against the American people.

Hongmin is a great scientist and I'm really excited to see this paper come out!!

Congratulations to @Caltech ESE grad student Hongmin Yu whose work continues to reveal new surprises about peroxy radical autoxidation. Read her latest paper on a surprising fast H-shift in 1,2-diethoxyethane pubs.rsc.org/en/content/a...

Group Leader in Observational Atmospheric Chemistry

We are looking for a Group Leader in Observational Atmospheric Chemistry. If you are a mid-career person interested in moving to lovely Zurich, please take a look and get in touch! jobs.ethz.ch/job/view/JOP...

Little reminder: Don't miss our CATCH seminar today! 👉

Calcifurr napping in the sun on his heated pad.

There's something wonderful about an orange kitty napping in the sun.

Erica Hartmann and I are hosting a session at ACS Fall 2026 in Chicago (August 23 - 27) called "Healthy indoor spaces: bridging the microbiome and chemistry". Abstract submission is open through March 30: tinyurl.com/crpctttf

Come join us in the Windy City and learn about healthy indoor spaces!

Analysis: Why the research money isn’t flowing from NSF and NIH White House review of agency spending plans for this year is causing delays

President Donald Trump’s budget office has disrupted the traditional process used to implement spending directives from Congress. https://scim.ag/4rBqcRu

Breaking News: UCAR files federal lawsuit to stop dismantling of National Center for Atmospheric Research Lawsuit lists NSF, NOAA, DOC, OMB and their directors as defendents

BREAKING: University Center for Atmospheric Research (UCAR) files suit against NSF, OMB, NOAA and DOC to halt alleged "violations of the Constitution and Administrative Procedure Act" undertaken by agencies to dismantle Nat'l Center for Atmospheric Research. open.substack.com/pub/balanced...

PostdocAd-GXS Postdoctoral Associate: Geostationary measurements of atmospheric chemistry Join us! Our atmospheric chemistry group at the University of Minnesota (UMN) is seeking applications for a Postdoctoral A...

Postdoc opening: Geostationary measurements of atmospheric chemistry

Join us! Our group seeks a postdoc to work on space-based measurements of atmospheric chemistry with the new generation of geo-IR satellite instruments.

See z.umn.edu/b5iz for details & contact me (dbm@umn.edu) with questions!

📅 Tracking Atmospheric Change from Space | Collegium Helveticum Earth’s atmosphere is undergoing rapid and far-reaching change, with consequences that extend from local air quality to the global climate system. The …

If you are in Zürich and interested in this topic consider joining us at the Collegium Helveticum on Tuesday (5pm)

collegium.ethz.ch/events/fello...

The costs of climate change are unavoidable. The question is whether rich oil companies and billionaires will contribute their fair share, or if all the externalities are pushed onto the public.

Join Hannah Horowitz and me in Chicago for ACS Fall 2026 (August 23 - 27) for a discussion of “Atmospheric Chemistry from Molecular to Global Scales!” Abstract submission is available here through March 30: callforabstracts.acs.org/acsfall2026/...

Lava fountains at Kīlauea on March 10, 2026.

Kīlauea is erupting again! I wish I could post about it, but I am deep in the throes of prep for our department field trip to central California next week. In the meantime, check out the webcam views: www.youtube.com/live/gXKuUyK...