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A comment on Effectiveness of trees in reducing temperature & outdoor heat exposure in Vegas. Parent comment

Re:Effectiveness of trees in reducing temperature & outdoor ... by gsf_emergency_2 on Wednesday July 02, 2025 @02:02AM (#44440647)
>on top of the air cooling effects of evaporation

I think you meant to say *on top of shade* because blocking the sun is the main effect here (the geometry makes more sense too!)

Less confusing phrase from abstract which implies that the 0.5deg evaporative cooling is almost a rounding error:

  during the day, trees provide significant shade by intercepting solar radiation, reducing mean radiant temperature (up to 16 °C)
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Re:Effectiveness of trees in reducing temperature & outdoor ... by bmacho on Wednesday July 02, 2025 @04:03AM (#44441208) 

   during the day, trees provide significant shade by intercepting solar radiation, reducing mean radiant temperature (up to 16 °C)
Sadly they work the opposite way at night, they don't allow SPACE to cool the ground. A textil/plastic plate moved automatically can provide more cold, if that's the goal.
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Re:Effectiveness of trees in reducing temperature & outdoor ... by gsf_emergency_2 on Wednesday July 02, 2025 @04:16AM (#44441269)
The best way imho is the triple combo of shade, radiative cooling, and water harvesting

Only ambient sunlight needed here, but they'd have to make the panels vertical

https://www.thebrighterside.news/post/mits-high-tech-hydroge...

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Re:Effectiveness of trees in reducing temperature & outdoor ... by bobthepanda on Wednesday July 02, 2025 @04:33AM (#44441351)
It really depends on how broad and high the tree canopy is; you don’t need super high tree density to provide a lot of shade.

The main benefit over other solutions is that properly selected trees require very little upkeep from humans, unlike anything mechanical or requiring movement. Though I imagine that is less the case in Vegas.

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