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Old December 22nd, 2017, 02:17 AM   #41
SydneyCarton
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I like it. It's another drop in the bucket for NY.
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Old December 22nd, 2017, 07:16 AM   #42
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Quote:
Can We Please Stop Drawing Trees on Top of Skyscrapers?

(...)

There are plenty of scientific reasons why skyscrapers don’t—and probably won’t—have trees, at least not to the heights which many architects propose. Life sucks up there. For you, for me, for trees, and just about everything else except peregrine falcons. It’s hot, cold, windy, the rain lashes at you, and the snow and sleet pelt you at high velocity. Life for city trees is hard enough on the ground. I can’t imagine what it’s like at 500 feet, where nearly every climate variable is more extreme than at street level.

Wind is perhaps the most formidable force trees face at that elevation. Ever seen trees on the top of a mountain? Their trunks bow away from the prevailing winds. That may be the most visible effect, but it’s not the most challenging. Wind also interrupts the thin layer of air between a leaf and the atmosphere, known as the boundary layer. The boundary layer is tiny by human standards—it operates on a scale small enough that normally slippery gas particles behave like viscous fluids.

For plants, the boundary layer serves to control evapotranspiration, or the loss of gas and water through the tiny pores on a leaf’s underside, known as stomata. In calm conditions, a comfortably thick boundary layer can exist on a perfectly smooth leaf. But plants that live in hot or windy places often have adaptations to deal with the harsh conditions, including tiny hairs on their leaves that expand each leaf’s surface area and thus its boundary layer. Still, plants in these environments aren’t usually tall and graceful. In other words, not the tall trees we see in architectural drawings.

Next let’s add extreme heat and cold to the mix. Extreme cold, well, we all know what that does. It can kill a plant by turning the water inside its cells into lethal, crystalline knives. At the other end, hot conditions post a different set of challenges. To cool off, plants can “sweat” by opening their stomata to release water vapor, at least as long as there’s water available. But even then, plants reach a limit. At certain temperatures, which vary from plant to plant, the photosynthetic machinery inside a leaf starts to break down. Keep in mind these are temperatures on the surface of a leaf, not ambient air temperature. The surface of a leaf—especially in direct sunlight, as on the unshaded side of a skyscraper—can be many degrees hotter than the air, up to 14 degrees C in some species (nearly 26 degrees F).

(...)
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Old December 23rd, 2017, 09:59 AM   #43
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the Vertical Forest proves trees have no problem being on skyscrapers. In fact they are thriving.
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Old December 23rd, 2017, 07:44 PM   #44
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^ There's a difference between trees at 100m and nearly 250m
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Old December 23rd, 2017, 08:02 PM   #45
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Yeah but the article tries to make its point with trees on a mountain. There's a difference between 250m and a mountain, too.

The highest mountain in my state is 971m and the tip is covered with a big forest of big trees and they're just fine.
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Old December 23rd, 2017, 08:24 PM   #46
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Quote:
Originally Posted by Manitopiaaa View Post
^ There's a difference between trees at 100m and nearly 250m
So at 250m, those lush trees would wither and die?
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Old December 23rd, 2017, 09:02 PM   #47
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The article is pseudoscientific nonsense and looks like an April Fool's joke, best to treat it that way.
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Old December 24th, 2017, 02:09 AM   #48
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Quote:
Originally Posted by JMGA196 View Post
so, no trees should grow in Denver or Mexico city since they are over 3000 and 6000 feet! And the forests on the Rockies and the Himalayas don't really exist because of this fellow deeming them impossible to grow "high up there" with the "extreme" climate!!!!
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Old December 24th, 2017, 02:50 AM   #49
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so, according to Arch Daily, there re no trees in Denver or Mexico city since they are over 3000 and 6000 feet! And the forests on the Rockies and the Himalayas don't really exist because of this fellow deeming them impossible to grow "high up there" with the "extreme" climate!!!!
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