Roger
on July 21, 2023 116 views
#Repost
///@drmalloyweather: What is cumulus turret succession?
Beauty and education collide with this insightful cumulus cloud timelapse! I love this footage captured during the monsoon by the University of Arizona (UofA) on July 17th, 2023. The timelapse showcases the daytime evolution, struggle, and ultimate success of thunderstorms reaching maturity in proximity to the Santa Catalina Mountains near Tucson, Arizona. There are numerous meteorological concepts on display worthwhile to dive into, but I want to focus for this post highlighting how fully fledged thunderstorm development in the late afternoon hours may have required a sequence of events traced all the way back to sunrise that day!
Let's get to it! A transformation on the local environment is jumpstarted after sunrise. Critically, heating of the terrain generates positive buoyancy at the surface, whether abundant moisture is present or not. You have likely noticed bubbles eventually developing at the bottom of a heated pot of water and then breaking off surging to the top. You are witnessing convection in action! This convective process is happening on a grand scale across the landscape as sunlight energy is absorbed by the ground and reradiated as heat to the air in contact. Essentially, the layer of air in contact with the ground gains enough positive buoyancy relative to the cooler air above and wants to rise in response. Within these rising currents of hotter air, also called thermals, available water vapor at the surface now can hitch a ride, so to speak, higher up in the atmosphere!...
Full discussion continues at https://www.drmalloyweather.com (IG character count per post is limited!).
https://www.drmalloyweather.com/2023/07/what-is-cumulus-turret-succession.html
A second timelapse over the Rincon Mountains near Tucson, Arizona, the same day is available on the website, too!
Weather is so cool!
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