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Dan Westervelt @dwesty.bsky.social · 6d

😱

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Reposted by Dan Westervelt

Faye McNeill @vfmcneill.bsky.social · 12d

Nice profile in Columbia News related to the Climate Week event we hosted Monday @aqtoolbox.org @mcneill-lab.org

Columbia Engineering @columbiaseas.bsky.social · 19d

We sat down with V. Faye McNeill to discuss her work co-leading the Clean Air Toolbox for Cities Initiative. Her upcoming event, happening during #ClimateWeek, will showcase pioneering work by researchers paving the way towards cleaner air and a sustainable climate.

https://bit.ly/46bc2iq

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Reposted by Dan Westervelt

Columbia Engineering @columbiaseas.bsky.social · 19d

We sat down with V. Faye McNeill to discuss her work co-leading the Clean Air Toolbox for Cities Initiative. Her upcoming event, happening during #ClimateWeek, will showcase pioneering work by researchers paving the way towards cleaner air and a sustainable climate.

https://bit.ly/46bc2iq

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Reposted by Dan Westervelt

africacleanair.bsky.social @africacleanair.bsky.social · 29d

The GRASP dataset is expanding access to air quality data across the continent.
Update: Ghana’s dataset is now live, providing daily PM2.5 trends from the early 2000s through 2024. A powerful tool to inform research, policy, and action for #CleanAir4Africa.
🔗 Explore here: bit.ly/42mk99m

Image of heatmap for Ghana showing air pollution data trends using a heatmap.

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Pallavi Pant, PhD @pallavipnt.bsky.social · 26d

📣 A new #AirQuality dataset for Ghana from @dwesty.bsky.social & colleagues

africacleanair.bsky.social @africacleanair.bsky.social · 29d

The GRASP dataset is expanding access to air quality data across the continent.
Update: Ghana’s dataset is now live, providing daily PM2.5 trends from the early 2000s through 2024. A powerful tool to inform research, policy, and action for #CleanAir4Africa.
🔗 Explore here: bit.ly/42mk99m

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Reposted by Dan Westervelt

Columbia University Clean Air Toolbox for Cities Initiative @aqtoolbox.org · Sep 5

Register today:

Data and Partnerships for Global Clean Air and Climate

Data and partnerships for global clean air and climate"

www.eventbrite.com

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Reposted by Dan Westervelt

Columbia University Clean Air Toolbox for Cities Initiative @aqtoolbox.org · Sep 5

Join us during #ClimateWeek @Columbia for an @aqtoolbox.org event,
"Data and Partnerships for Global Clean Air and Climate"

@columbiaseas.bsky.social @climate.columbia.edu @climategroup.bsky.social @openaq.org @columbiauniversity.bsky.social @lamont.columbia.edu @dwesty.bsky.social

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Faye McNeill @vfmcneill.bsky.social · Aug 29

Sometimes patience pays off... This paper has been in the works since I was still in my 30s 🤣

It was a pleasure to travel to Xian and work with @amgcarlton.bsky.social and other friends and colleagues on this

Secondary organic aerosol in urban China: A distinct chemical regime for air pollution studies

In the past decades, China has witnessed high air pollution associated with rapid economic development, although regulatory efforts have alleviated the situation since 2013. Haze events characterized ...

urldefense.proofpoint.com

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Reposted by Dan Westervelt

Faye McNeill @vfmcneill.bsky.social · Aug 11

Happy to see this one out!

TL;DR: under the right conditions* GUV lamps aren't too bad for air quality in a real-world conference room

*only use the minimum necessary GUV intensity for the space, preferably have good ventilation

journals.plos.org/plosone/arti...

Effects of germicidal far-UVC on ozone and particulate matter in a conference room

The application of 222 nm light from KrCl excimer lamps (GUV222 or far-UVC) is a promising approach to reduce the indoor transmission of airborne pathogens, including the SARS-CoV-2 virus. GUV222 inac...

journals.plos.org

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Reposted by Dan Westervelt

Lamont-Doherty Earth Observatory @lamont.columbia.edu · Aug 8

In the past, emissions from power plants or vehicles were bigger drivers of bad air quality. Now, wildfires are pretty much the whole story when it comes to air quality problems in the US, says @lamont.columbia.edu climate scientist @dwesty.bsky.social. Via @npr.org.

Canadian wildfires are impacting air quality in the U.S.

Canada is having its second worst wildfire season yet. Two scientists explain what a red air alert means and how anyone living in impacted areas can protect themselves.

www.npr.org

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Dan Westervelt @dwesty.bsky.social · Jul 29

Tough scene for us last minute abstract submitters! #AGU

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Lamont-Doherty Earth Observatory @lamont.columbia.edu · Jul 23

New study finds that cleaner air has accelerated the increase in heatwaves. "The findings are compelling and add to a growing body of literature on how aerosols can have out-sized impacts on climate extremes," says @lamont.columbia.edu climate scientist @dwesty.bsky.social. Via @newscientist.com.

Cleaner air has increased the number of city heatwaves

Reducing air pollution is critical for improving public health, but it has brought big climate trade-offs

www.newscientist.com

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Dan Westervelt @dwesty.bsky.social · Jul 22

Nice article on a recent insightful paper, featuring a quote from me

James Dinneen @jamesdinneen.bsky.social · Jul 22

Cleaning up aerosol pollution is critical for public health. But reducing aerosols is also unmasking warming from greenhouse gases - researchers here find this influence is strongest in populated places. 🧪

Cleaner air has increased the number of city heatwaves

Reducing air pollution is critical for improving public health, but it has brought big climate trade-offs

www.newscientist.com

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Dan Westervelt @dwesty.bsky.social · Jul 16

New research from a large team including myself pointing to aerosol reductions in East Asia being responsible for recent observed acceleration in global warming. In particular we find this to be a bigger driver than the oft-mentioned shipping sulfur emissions reductions.

Lamont-Doherty Earth Observatory @lamont.columbia.edu · Jul 15

New study by LDEO's @dwesty.bsky.social, CCSR/NASAGISS' Larissa Narazenko & Kostas Tsigaridis et. al. finds that cleanup of air pollution in East Asia has accelerated global warming because some forms have helped shade the Earth's surface from the sun's energy: lamont.columbia.edu/news/air-pol...

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Lamont-Doherty Earth Observatory @lamont.columbia.edu · Jul 7

"If you look at a time series of the entire year of data, you can almost instantly pick out July 4th because there'll be a huge spike in particulate matter concentration," says @lamont.columbia.edu expert @dwesty.bsky.social‬, with implications for the environment & health. Via The Weather Channel.

How Fireworks Impact The Environment - Videos from The Weather Channel

Fireworks are synonymous with the Fourth of July, but they come with a hidden cost. Beyond the bright colors and loud booms, they release pollution and harmful chemicals that can impact both the envir...

weather.com

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Robert Rohde @rarohde.bsky.social · Jul 1

If they close all these research labs, you can't just undo it four years later.

Decades of expertise and tons of specialized equipment will be scattered to the wind. Rebuilding would take ages.

Robert Rohde @rarohde.bsky.social · Jun 30

Proposed NOAA budget zeros out ALL climate laboratories and cooperative institutions.

GFDL, NSSL, GML, etc.

This appears to also end the US greenhouse gas sampling network, including at Mauna Loa, the oldest continuous carbon dioxide monitoring site on Earth.

www.commerce.gov/sites/defaul...

Excerpt from proposed NOAA budget showing zero funding for Climate Laboratories and Cooperative Institutes

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Faye McNeill @vfmcneill.bsky.social · Jun 23

Besides the fact that it's hot AF, our air quality is garbage today. I don't know about you but for my asthma, ozone days like this hit harder than PM days, and the heat is an extra load on your body. Keep cool and take it easy.

AirNow.gov AQI report for NYC: Unhealthy for Sensitive Groups

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Reposted by Dan Westervelt

Grist @grist.org · Jun 5

The smoke from Canada’s wildfires may be even more toxic than usual.

A legacy of mining means that toxic metals could be carried along plumes of smoke.

grist.org/climate/cana...

#Wildfire #Smoke #Wildfires #Climate #Air #AQI

The smoke from Canada's wildfires may be even more toxic than usual

The country's legacy of mining means that toxic metals could be carried along plumes of smoke, endangering people in its path.

grist.org

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Dan Westervelt @dwesty.bsky.social · Jun 4

for current data one of the best resources is here: www.airnow.gov/wildfires/

Wildfires Landing Page | AirNow.gov

Wildfire smoke is a mixture of air pollutants of which particulate matter is the principal public health threat. Although a large population can be exposed to smoke during a wildfire event, most healt...

www.airnow.gov

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Dan Westervelt @dwesty.bsky.social · Jun 4

Wildfire smoke is back across most of the eastern half of the US! It was this month 2 years ago that an exceptional smoke event blanketed NYC and much of the east coast, vaulting the story into national news. Here's a spotlight I did back then which is still relevant: www.curbed.com/2023/06/nyc-...

Talking to an Air-Quality Expert About That Haze

Should you go outside? Wear a mask? Let us explain.

www.curbed.com

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Faye McNeill @vfmcneill.bsky.social · Jun 2

Wow a whole article about aerosols www.nytimes.com/2025/06/02/w...

A Giant Plume of Saharan Dust Is Headed to Florida

www.nytimes.com

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Ryan @ryanswx.bsky.social · Jun 1

The smoke has become remarkably thick over DC as shown by NASA’s AERONET. Thankfully, it’s still located about 2 miles above the surface shown by NASA’s MPLNET. Both important ground based networks operate out of NASA/GSFC in Greenbelt, MD

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Dan Westervelt @dwesty.bsky.social · May 14

Mentorship of students is one of the most fulfilling aspects of my career, and I've been extremely lucky to be able to work with such brilliant, talented students over the years.

Dan Westervelt @dwesty.bsky.social · May 14

I am grateful to the awards committee for this recognition, along with all of the fantastic past and present students in my research group who were kind enough to nominate me.

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Dan Westervelt @dwesty.bsky.social · May 14

I am thrilled and honored to announce that I was awarded the 2025 Columbia University Graduate School of Arts and Sciences Faculty Mentoring award, in recognition of excellence in mentoring of masters and doctoral research students. www.gsas.columbia.edu/news/2025-gs...

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