Discover and read the best of Twitter Threads about #CASAChem

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#AAAR2022. @kjmayer4. (disclosure: I was involved in this study)

- Cited study showing in 2020 over 25 million Americans (8%) experienced >100 ug/m3 of PM2.5.

- #CASAChem Experiments looked at the impact of long range smoke impacts.
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- Examined 1) fresh smoke, 2) fresh smoke plus ozone, 3) aged smoke.

- Ozone addition to fresh smoke did not change the particle composition or sized distribution significantly indoors.
2/
- Aged smoke was smoke that sat in chamber for a couple hours prior to injection into the house.

- Ozone in addition to aged smoke shows change in particle chemical concentrations over time.
3/
Read 5 tweets
#AAAR2022. @ChemDelphine discusses #CASAChem study (full disclosure I was involved).

- CASA was a huge collaborative research group project to investigate indoor chemistry experiments related to wild fires, ozone, and surface aging. 1/
- "Clean air act has really worked." With respect to sulfate.

- But wildfire smoke is still a big driver. 2/
- Simulated wood smoke infiltrating home by using a cocktail smoker and ponderosa pine.

- Gas Phase biomass burning markers never returned to backgrounds even after days of ventilation.

Surface/air partitioning controls long term partitioning. 3/
Read 5 tweets
Excited to attend my first AAAR conference today in Raleigh, NC.

Looking forward to meeting twitter friends I have never met in person, some great talks from the #CASAChem and ALPACA projects and learning new aerosol science.

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I will be live tweeting this week with the #AAAR2022 hashtag. Follow along with AAAR Social Media Ambassadors @DaveyRachel1, @ClaraOak24, @colleenesterase& @kapur_sukriti who will also be live tweeting.

And yes, mask are mandatory. 2/2 Image
Addendum Image
Read 4 tweets

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