> not the standard 2m above ground you made me think of an experiment i did (1.83m tall) in the foothills at higher elevation north of Phoenix last week: i tr

> not the standard 2m above ground you made me think of an experiment i did (1.83m tall) in the foothills at higher elevation north of Phoenix last week: i tried walking barefoot on white concrete sidewalk at noon, for about 5 meters. The UV is extremely high here, and temps have been over 110F (around mid 40s celsius) for weeks a few hundred feet lower in elevation. It's scaldingly hot at the surface, while up around 2m up it's hot but MUCH less hot. Something it keep in mind with dogs, obviously. It's basically dawn and after dusk for walking here for another few weeks.