PETRICHOR/Trey Anastasio and the L.A. Philharmonic 9-26-2014 Hollywood Bowl

Petrichor (/ˈpɛtrɨkɔər/) is the earthy scent produced when rain falls on dry soil. The word is constructed from Greek, petra, meaning ‘stone’, + ichor, the fluid that flows in the veins of the gods in Greek mythology.
The term was coined in 1964 by two researchers, Isabel Joy Bear (Australian) and Roderick G. Thomas (British), for an article in the journal Nature.[1][2] In the article, the authors describe how the smell derives from an oil exuded by certain plants during dry periods, whereupon it is absorbed by clay-based soils and rocks. During rain, the oil is released into the air along with another compound, geosmin, a metabolic by-product of certain Actinobacteria, which is emitted by wet soil, producing the distinctive scent; ozone may also be present if there is lightning.[3] In a follow-up paper, Bear and Thomas (1965) showed that the oil retards seed germination and early plant growth.[4] This would indicate that the plants exude the oil in order to safeguard the seeds from germination under duress.
In 2015, MIT scientists used high-speed cameras to record how the scent moves into the air.[5] The tests involved approximately 600 experiments on 28 different surfaces, including engineered materials and soil samples.[6] When a raindrop hits a porous surface, small bubbles form that float to the surface and release aerosols.[5] Such aerosols carry the scent as well as bacteria and viruses from the soil.[5] Raindrops that move at a slower rate tend to produce more aerosols; this serves as an explanation for why the petrichor is more common after light rains.[5]
Some scientists believe that humans appreciate the rain scent because ancestors may have relied on rainy weather for survival.[7]

[@kevinreed95]

This is perhaps my favorite thing Trey has ever done. It's just so absolutely beautiful.

[@averyprice9422]

kevinreedmusic1 me too.. It's close to perfect

[@stacybenstockklein449]

Heavenly!!! #welcometomyphishylife #letsmakeamovie

[@peterjones7531]

This is beautifully done, I love this. Shortly thereafter Trey went on to TAB tour and Blew minds, Boston shows on 12/5 & 6 were amazing.

[@nognuisagoodgnu]

😋 so purr-ty 🙏

[@joeconti4392]

Treythoven, for sure.

[@kyleveenema1428]

Holy shit, what awesome info in the description. I'm a scientist. Nice job on this post

[@stevethebandnj]

Great video! It's an amazing piece. Just wanted to add that the title is called "Petrichor." Thanks for posting!

[@daveleafey9283]

Masterful

[@Ltspineshank]

This was a good show, the bowl was half packed but everyone had a great time. Perhaps the Greek would have been better, but I loved Water in the Sky acoustic

[@averyprice9422]

Jim Johnson i seen him last night in nashville.. The water in the sky was really good.. Y.E.M. and WITS encore... But this.. Petrichor was the reason i went..

[@maxoconnell1903]

3:18-3:25 amazing

[@averyprice9422]

This was better than last nights.. I like he didn't sing..