Looking forward to participating in tomorrow's #ClimatetechSummit and teaching folk that all AIR POLLUTION (not just CH4 + CO2) is worthy of their time/attention/resources.

The fight to save planet earth starts and ends with the air you breathe.

@GreentownLabs Chairs less pile-ish.

aerosol-intuition 101

Where there is light, there are particles.

Where there isn't light, there are particles. These are dust particles / 1-1000 micrometers in diameter / as far as air pollution particles go, these are BIG, way bigger than particles emitted from burning stuff (wood, gasoline, jet fuel, plastic bags, dung).

Eben's air-airport cartoons #AAAR2022 out! Incomplete combustion here, there & everywhere.

This passing comment in tonight's #AAAR2022ID panel is one that really sticks with me. For much of this pandemic the thing that has F'd our collective response more than anything else is ppl's PERCEPTIONS of costs and benefits.

https://twitter.com/ARISense_AQ/status/1578156583707881472

The strongly held BELIEF that running a box fan on low for 12h a day in every classroom of a school building for an entire school year will somehow bankrupt the district is straight up NOT TRUE.

https://twitter.com/ARISense_AQ/status/1578027617361743873?t=PgZosnAWxqYN290fpRj-7w&s=19

#AAAR2022 PANEL #2

Gaps in the Aerosol Science Identified During the COVID-19 Pandemic Q: What is the one thing we still need to know about infectious transmission?

#AAAR2022 Panel 1 - Lesson Learned from the COVID- 19 Pandemic and Panel 2 - Gaps in the Aerosol Science Identified During the COVID-19 Pandemic

1. Lessons
2. Gaps

Here we go! Hope I can learn some stuff.. 1/ Provide opportunity to have discussion. Recording video and audio to hopefully later -

@huffman just gave me permission to live tweet all this. Phew.

@PollittKrystal is tag-teaming on moderation.

#AAAR2022 Improvement of Air Quality in Vehicles – Simulation of Two Different Use Cases of HEPA Filtration. Matisse Lesage, David Chalet, Jérôme Migaud, Christoph Krautner, SHIKHAR ARORA, Nilesh Tharval, Martin Lehmann, MANN+HUMMEL GmbH Ultrafine particles matter a lot. In number. 90% of the number conc. 10% of the mass (they are not heavy). But they follow gas streamlines into your body - direct route to the deepest, dearest parts of your body. You don't want this. Lots of unknowns how terrible this..

#AAAR2022 Aerosol Dispersion of Submicrometer Particles in an Aircraft Cabin. Stephanie Vannarath, Peter Kim, Mitchell Ford, Arvind Santhanakrishnan, Yu Feng, CHANGJIE CAI, The University of Oklahoma Health Sciences Center Airplane cabins! Oh boy.. excited for this one.

#AAAR2022 Suppressing Spread of Viral Sneeze Droplets Using Transparent Curtains in Large Food Processing Facilities. SUNIL KUMAR, Maria King, David Klassen, Texas A&M University Modeling rooms with and without partitions

#AAAR2022 Spray Droplet Size in Liquid Sheets Containing Surfactants and Oil Emulsions. IAROSLAV MAKHNENKO, Long Nguyen, Cari Dutcher, Christopher J. Hogan, Elizabeth Alonzi, Christine Colby, Steven Fredericks, University of Minnesota Agricultural spraying - spraying drift is a problem. 30% of all complaints come from this phenom. Droplets are traveling long distances airborne.

100-150 micron droplets.

Need to prevent spray drift: Trees around your field.

#AAAR2022 Cleaning the Indoor Air with Low-Cost DIY Air Cleaners. Nirmala Thomas Myers, Taewon Han, Kevin Dillon, GEDIMINAS MAINELIS, Rutgers, The State University of New Jersey

#CorsiRosenthalBox talk CR/DIY Filtration -

Measured dB, fan temp, power consump. (kWh), air velocity, particle concentraitons

Purchased a bunch of Lasko fans

Bunch of filters MERV 8-13 1-4" thick.

#AAAR2022 Characterizing and Comparing Respiratory Aerosol Emission for Pre-adolescent, Adolescent, and Adults during Sustained Phonation. MAHENDER SINGH RAWAT et al. Clarkson University Respiratory aerosol emissions.. size distribution matters, virality matters.

#AAAR2022 Say It Don't Spray It! Large Droplet Emissions from Speaking, Singing, and Playing Wind Instruments. KY TANNER, Kristen Good, Dan Goble, Nicholas Good, Amy Keisling, Christian L'Orange, Emily Morton, Rebecca Phillips, John Volckens, Colorado State University Large salivary particle emissions! Yay. Yuck.

#AAAR2022 Absolute Respiratory Particle Number and Mass Exhalation Rates and Size Distributions during Breathing and Vocalizing. JONATHAN P. REID et al., University of Bristol begin - team is huge / lots of help / team effort -

#AAA2022 Performance of Plantower PMS Sensors and the Alphasense Optical Particle Counter for Measuring PM10 Concentration in the Laboratory and Field. KERRY KELLY, Kamaljeet Kaur, Ross Whitaker, University of Utah. 1/ The "Great" Salt Lake is no longer 'so great' -

We have a large 750 mile stretch of dry lake bed. Prevailing wind pushes the air into population of over 1M people.

#AAAR2022 Bound!

I know.. pandemic's over. Cool cool.

But let's do some air "volume" exercises, just for kicks. Where's the most air at!?

20' ceiling 🙌🏻 terminal. Think I'll resist that burning boarding first FOMO and just get on last, thanks. Breathing out here is just so air-full!

Peer pressure thoughts.

As a kid/adolescent I decided early on that I wasn't going to drink. It just wasn't for me. Navigating the peer pressure gauntlet of high school and then college was an experience. That peer pressure 'feeling' had long since faded, until now... Now..that strange pit of your stomach peer pressure real-feel has re-emerged, but not bc of alcohol. Now, I feel it every time I put on a mask to go inside some indoor/shit ventilation space. And my kids feel it too as they start school.

Had great time kicking off #NAAMC in Pittsburgh with a personal tour of NIOSH lab where they do a ton of work on mine safety and respiratory dust protection. This apparatus is designed to create a clean air curtain around workers in high Quartz-content dust generation activities. This is a $50K dust vacuum closet designed to remove dust from workers clothes to avoid clothing-derived dust exposure post-shift.

Flying tips from an aerosol scientist w. a 4y old

Tip #1: leave 4y old at home.

Tip #2: be okay being LAST to board. Time spent in un-ventilated accordion walkway/bridge: 47s

Time spent stuck in the aisle waiting for folks to shove 75lb 'carry-ons' into overstuffed overheads: 86s

Time sitting in-seat whilst on APU power (aka shittiest vent operating mode): ~4 min

*best to gate check your bag

Ultimately 'story' + 'narrative' is what holds our attention. And narratives are rarely built from scientific facts or data or public health statistics. Instead, the narrative that persists

"..has a tendency to preserve the power of whoever's powerful." -Tamim Ansary Thought provoking stuff esp. for a guy who's still learning that scientific facts (in the absence of story) don't get you very far when it comes to inspiring people to give a shit.

🙌🏻 @throughlineNPR

npr.org/2022/02/02/107…

@MayorWu @wutrain @BostonSchools - I saw a lot of praise for your public launch of IAQ dashboard this past week and I agree w. the sentiment that actionable, real-time IAQ data (specifically size-resolve PM & CO2) are critical tools for informing indoor air strategies.

BUT.. As someone who's spent the better part of the last decade dedicating his life to figuring out how to get DECENTLY ACCURATE / GOOD ENOUGH data out of lower-cost AQ sensors, I have a couple concerns.