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Dylan B. Millet

@dbm.bsky.social

570 followers 590 following 52 posts

Atmospheric chemist | 🇨🇦🇺🇸 but mostly 🇨🇦 | Distinguished McKnight University Prof @ U Minnesota

Videos

Environmental science 51%

Geography 18%

Posts Media Videos Starter Packs

Reposted by Dylan B. Millet, Delphine K. Farmer

Emily Barnes Franklin, PhD @emfranklin.bsky.social · 14d

Out this week in npj Climate and Atmospheric Science: VCPs, biogenic VOCs and traditional anthropogenic PM respond to heat and smoke to drive summer PM pollution outside NYC, highlighting vulnerabilities of urban air quality under global change. @chemdelphine.bsky.social @dbm.bsky.social

Emerging drivers of urban aerosol increase global change vulnerability in a US megacity

npj Climate and Atmospheric Science - Emerging drivers of urban aerosol increase global change vulnerability in a US megacity

rdcu.be

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Dylan B. Millet @dbm.bsky.social · Sep 8

For sale, one sonic anemometer, lightly used

A photo of a sonic anemometer with the top arm sheared off

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Reposted by Debra Wunch, Dylan B. Millet, Colette L. Heald

Paul Wennberg @paulowennberg.bsky.social · Mar 24

@NASA and @caltech.edu kineticist extraordinaire Stan Sander died Saturday night surrounded by his family. Stan was a kind mentor, inventive scientist and engineer. He will be sorely missed by me and many colleagues around the world.

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Reposted by Dylan B. Millet

William B. Fuckley @opinionhaver.bsky.social · Jul 23

Some memes are relatable they aren’t even like funny, just actively insulting.

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Reposted by Dylan B. Millet

Jose D Fuentes @jdfuentes.bsky.social · Jul 10

Save data provided by NASA's Earth Science Division, as outlined by a letter in Science magazine www.science.org/doi/10.1126/... @biometlab.bsky.social @paulstoy.bsky.social @dbm.bsky.social @agu.org @ametsoc.org

NASA Earth Science Division provides key data

In May, the US administration proposed budget cuts to NASA, including a more than 50% decrease in funding for the agency’s Earth Science Division (ESD) (1), the mission of which is to gather knowledge...

www.science.org

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Reposted by Colette L. Heald

Dylan B. Millet @dbm.bsky.social · Jul 10

A letter in Science about the importance of NASA Earth Science from several members of the recently-dissolved NASA Earth Science Advisory Committee.

Out today online and in the 7/24 issue.

www.science.org/doi/10.1126/...

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Paul Voosen @voosen.me · Apr 11

BREAKING from @science.org: The Trump admin is seeking to kill nearly all climate research at NOAA, its climate science agency.

Its near-final budget proposal would end all NOAA research labs, academic institutes, and regional climate centers. And it wants to fully end the NOAA Research division.

Trump seeks to end climate research at premier U.S. climate agency

White House aims to end NOAA’s research office; NASA also targeted

www.science.org

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Reposted by Colette L. Heald

Dylan B. Millet @dbm.bsky.social · Mar 27

And announced today, Stan was selected as one of the 2024 class of AAAS Fellows:
www.aaas.org/programs/fel...

Even though it only just became public, selections were made back in November so Stan did find out at that point.

2024 AAAS Fellows | American Association for the Advancement of Science (AAAS)

www.aaas.org

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Dylan B. Millet @dbm.bsky.social · Mar 27

Sometimes you *should* meet your (science) heroes. Stan was a giant of chemical kinetics and just a gem of a person. We will miss him.

Paul Wennberg @paulowennberg.bsky.social · Mar 24

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Dylan B. Millet @dbm.bsky.social · Mar 13

Folks on this platform will readily think of many other examples. This type of research gives us information we need for smart, informed planning. We can have good-faith policy arguments about what to *do*, but choosing to be uninformed by not collecting data … is just failure.

Dylan B. Millet @dbm.bsky.social · Mar 13

… and revealed the rising importance of non-transportation emissions for urban air quality.
www.science.org/doi/full/10....

Volatile chemical products emerging as largest petrochemical source of urban organic emissions

Chemical products contribute as much organic air pollution as transportation emissions in many cities.

www.science.org

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Dylan B. Millet @dbm.bsky.social · Mar 13

… showed how declining transportation emissions have reduced smog (psst, the Clean Air Act works!) …
doi.org/10.1029/2012...

Multiyear trends in volatile organic compounds in Los Angeles, California: Five decades of decreasing emissions

VOCs and CO have decreased by a large factor in LA since 1960s VOC emission ratios have not changed Rate of decrease in London is more rapid, but started later

doi.org

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Dylan B. Millet @dbm.bsky.social · Mar 13

… showed how intercontinental transport affects US air quality …
www.nature.com/articles/nat...

Increasing springtime ozone mixing ratios in the free troposphere over western North America - Nature

High concentrations of ozone in the troposphere are toxic and act as a greenhouse gas. Anthropogenic emissions of ozone precursors have caused widespread increases in ozone concentrations since the la...

www.nature.com

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Dylan B. Millet @dbm.bsky.social · Mar 13

… demonstrated how changing wildfire emissions are impacting air quality …
doi.org/10.1029/2022...

Fire Influence on Regional to Global Environments and Air Quality (FIREX‐AQ)

This work is an overview of the NOAA/NASA Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) field experiment FIREX-AQ investigated biomass burning emissions and chemist...

doi.org

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Dylan B. Millet @dbm.bsky.social · Mar 13

There has been way too much groundbreaking research from CSL to mention it all here. A couple examples that often come up in my work:

CSL research helped show the role that natural VOCs play in ozone pollution (changes control strategies!) …
www.nature.com/articles/329...

Models and observations of the impact of natural hydrocarbons on rural ozone - Nature

Nature - Models and observations of the impact of natural hydrocarbons on rural ozone

www.nature.com

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Dylan B. Millet @dbm.bsky.social · Mar 13

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

NOAA Chemical Sciences Laboratory

NOAA CSL: Advancing scientific understanding of the chemical and physical processes that affect Earth's atmospheric composition and climate.

csl.noaa.gov

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Dylan B. Millet @dbm.bsky.social · Mar 13

These were *volunteer* science advisory committees that provided NASA with independent perspective and community guidance ... explain to me how eliminating these is a way to "reduce waste and abuse"

Screenshot showing an email from NASA SMD stating that the external advisory committees for the 5 NASA science divisions are being eliminated

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Reposted by Dylan B. Millet

Dr. Lucky Tran @luckytran.com · Feb 25

The #standupforscience2025 rallies will be held in DC and around the U.S. NEXT FRIDAY.

Please sign up to attend at standupforscience2025.org

To effectively push back the attacks on science happening now, it is so critical to show mass support for science by gathering together in the streets!

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Dylan B. Millet @dbm.bsky.social · Feb 16

🧪

Brian Nosek @briannosek.bsky.social · Feb 12

Stand Up for Science rallies will be held in DC and state capitals on March 7th. Share with friends. Sign-up here to get email updates with details: www.eventbrite.com/e/stand-up-f...

STAND UP FOR SCIENCE 2025 - DC and NATIONWIDE

Stand up for science with us on March 7th, 2025, because science is for everyone! More info at www.standupforscience2025.org

www.eventbrite.com

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Reposted by Jeremy Grimshaw, Ṣebnem Kalemli‐Özcan, Dylan B. Millet , and 4 more Jeremy Grimshaw, Ṣebnem Kalemli‐Özcan, Dylan B. Millet, Tanya Heikkila, Allison Lombardi, Jeremy Freese, Emanuela Galasso

Brian Nosek @briannosek.bsky.social · Feb 12

Stand Up for Science rallies will be held in DC and state capitals on March 7th. Share with friends. Sign-up here to get email updates with details: www.eventbrite.com/e/stand-up-f...

STAND UP FOR SCIENCE 2025 - DC and NATIONWIDE

Stand up for science with us on March 7th, 2025, because science is for everyone! More info at www.standupforscience2025.org

www.eventbrite.com

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Reposted by Dylan B. Millet, John Parker

Dr. Jennifer Wade @volcanojw.bsky.social · Feb 8

Do you want a big overview of NSF, explaining things like the fact that 24% of all federally funded academic fundamental research comes from NSF? And that 94% of its budget goes out the door in grants/awards? Here you go. nsf-gov-resources.nsf.gov/files/Factsh...

An “NSF BY THE NUMBERS” fact sheet screenshot with some facts about “ADVANCING SCIENCE AND ENGINEERING RESEARCH IN THE U.S. AND ABROAD”

-The U.S. National Science Foundation was created by Congress in_ 1950 to continue the U.S. science and technology enterprise began during World War II.
-NSF allocates 94% of its approximately $8.5 billion budget for grants and awards to support research projects, facilities and STEM education.
-NSF funds research in all 50 states and U.S. territories.
-NSF fosters international scientific collaboration on all 7 continents around the globe.
-About 2,000 academic and other private and public institutions across the U.S. conduct NSF-funded research.
-NSF supports 24% of all federally funded academic fundamental research at U.S. colleges and universities.
fundamental research comes from NSF.
- In 2020, NSF received approximately 43,000 research proposals from scientists and engineers and funded about 12,000.
- NSF-funded researchers have received 248 Nobel Prizes.

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Reposted by Dylan B. Millet

Tina Smith @smith.senate.gov · Feb 7

These are the people who monitor and publish Lake Superior's conditions every day. Minnesotans along the North Shore rely on NOAA to know whether or not it’s safe to go out on the water.

These agencies and their staff do real work that keeps us safe, it just goes unnoticed - until they’re gone.

"Former NOAA officials told CBS News that current employees have been told to expect a 50% reduction in staff and budget cuts of 30%."

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Dylan B. Millet @dbm.bsky.social · Jan 22

🧪 The Water Resources Center wrc.umn.edu at the University of Minnesota is looking for a new director. Come be my colleague! Application info here: hr.myu.umn.edu/jobs/ext/366...

Water Resources Center | Water Resources Center

wrc.umn.edu

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Dylan B. Millet @dbm.bsky.social · Jan 2

🤮 No respect for anyone using genAI to write reviews. If you don't have time to write an actual review, just decline the invitation! Sorry you're dealing with that nonsense

Reposted by Dylan B. Millet

biometlab @biometlab.bsky.social · Dec 26

youtu.be/co7gJJHf6IQ

Wonderful explanation of Euler’s Equation and foundation for Fourier transforms

Euler’s Equation’s Beauty Explained

YouTube video by Ali the Dazzling

youtu.be

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Dylan B. Millet @dbm.bsky.social · Dec 19

A great collaboration with @chemdelphine.bsky.social, @chemj.bsky.social, @timothybertram.bsky.social, @profdesai.bsky.social, and others not on bluesky.

@mvermeuel.bsky.social has moved on and is now Ass’t Prof at Purdue, watch for cool research from his new group!
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Dylan B. Millet @dbm.bsky.social · Dec 19

5) Curiously, current atmospheric models already tend to overpredict atmospheric ozone. So if they are also overestimating ozone deposition, this means there must be other, larger (partly offsetting!) problems with our ozone models. More research is needed 🤓
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Dylan B. Millet @dbm.bsky.social · Dec 19

3) Ozone-driven plant phytoxicity due to ozone is also overestimated, by up to 7x!
4) Chemical reactions inside forest canopies has been proposed to be one important ozone loss mechanism. But @mvermeuel.bsky.social shows that this is trivial for the 3 forest types examined
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Dylan B. Millet @dbm.bsky.social · Dec 19

Some interesting results: 1) the normal “big-leaf” treatment used widely in models like GEOS-Chem overpredict ozone deposition to forests by 2x! 2) These models also do not reproduce observed variability, implying that they do not capture underlying mechanisms that will control future change.
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Dylan B. Millet @dbm.bsky.social · Dec 19

Standard atmospheric models simulate this deposition in a very rudimentary way, by treating 3D canopies as one big leaf. @mvermeuel.bsky.social combined a resolved-canopy model, a 3D atmospheric model, and atmospheric data to better understand the ozone deposition process over 3 forests
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