Date: 27/08/2015 12:57:10
From: CrazyNeutrino
ID: 767251
Subject: NASA figured out a surprisingly simple way to cool down hot cities
NASA figured out a surprisingly simple way to cool down hot cities
Miles of pavement and clusters of towering buildings are exceptionally good at turning cities into pockets of blistering heat.
But new research from NASA suggests a surprisingly simple change could help cool growing metropolises.
Materials like concrete, asphalt, stone, and steel are dense and not very porous, so they absorb heat from the sun and constantly radiate it into the surroundings. This “heat island” effect makes cities about 2 to 5 degrees Fahrenheit warmer than neighbouring suburbs and rural areas.
more..
Date: 27/08/2015 12:57:52
From: CrazyNeutrino
ID: 767252
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
this bit from the article is interesting
A few degrees may not sound like a huge difference, but it’s enough to cause a huge uptick in air conditioning demand — and the resulting energy use. A temperature increase of about 2 degrees Fahrenheit can boost energy use from AC in the summer from 5% to 20% in the US, according to the Environmental Protection Agency.
Date: 27/08/2015 12:58:12
From: sibeen
ID: 767253
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
NASA should figure out how to use SI units.
Date: 27/08/2015 12:59:31
From: Cymek
ID: 767255
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
sibeen said:
NASA should figure out how to use SI units.
Thats Commie talk
Date: 27/08/2015 13:02:37
From: buffy
ID: 767257
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
Well, I have to say that was a well, deeerrrrr!!! moment, reading that.
Date: 27/08/2015 13:03:51
From: sibeen
ID: 767258
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
The good news from NASA is that planting more green things in and around cities can help.
Gobsmacked.
Date: 27/08/2015 13:06:58
From: buffy
ID: 767261
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
sibeen said:
The good news from NASA is that planting more green things in and around cities can help.
Gobsmacked.
You were impressed too, I see. How is it that people keep ‘discovering’ things we already knew? Doesn’t anyone do literature searches to see if their idea has come up before?
Date: 27/08/2015 13:13:04
From: sibeen
ID: 767264
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
buffy said:
sibeen said:
The good news from NASA is that planting more green things in and around cities can help.
Gobsmacked.
You were impressed too, I see. How is it that people keep ‘discovering’ things we already knew? Doesn’t anyone do literature searches to see if their idea has come up before?
Very impressed. It’s up there with a press release from MIT :)
Date: 27/08/2015 13:17:16
From: Ian
ID: 767266
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
sibeen said:
buffy said:
sibeen said:
The good news from NASA is that planting more green things in and around cities can help.
Gobsmacked.
You were impressed too, I see. How is it that people keep ‘discovering’ things we already knew? Doesn’t anyone do literature searches to see if their idea has come up before?
Very impressed. It’s up there with a press release from MIT :)
Filed under BBO (bleedin bloody obvious).
Date: 27/08/2015 13:17:50
From: Boris
ID: 767268
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
paint the roofs white. you know it’s the only way.
Date: 27/08/2015 13:46:05
From: The Rev Dodgson
ID: 767281
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
Boris said:
paint the roofs white. you know it’s the only way.
Expect a letter from wookie’s solicitors.
Date: 27/08/2015 14:03:29
From: transition
ID: 767287
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
>… ‘discovering’ things we already knew?
pictures haet affected gog moving in and out of tree shade, then a light bulb moment, few grunts and various gesturing as tries to explain to other gogs, then all sit down in the shade alongside the semi-domesticated wolf.
Date: 27/08/2015 14:06:10
From: Cymek
ID: 767289
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
transition said:
>… ‘discovering’ things we already knew?
pictures haet affected gog moving in and out of tree shade, then a light bulb moment, few grunts and various gesturing as tries to explain to other gogs, then all sit down in the shade alongside the semi-domesticated wolf.
Greenery is also psychologically cooling, quite peaceful as well and helps most people to relax
Date: 27/08/2015 14:17:04
From: transition
ID: 767296
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
>Greenery is also psychologically cooling, quite peaceful as well and helps most people to relax
read of a study in NS way back (12+ years maybe), with very young children (pre strong cultural influences, maybe was babies or toddlers), the purpose of the test as recall was to determine any native (or lack of) preference for types of environments, probably involved pictures and gaze time or something, anyway it seems there was a preference for savanna, which the article then went on to speculate resembles what many people reproduce in modern times around their houses, further it speculated this allowed looking out but some ‘privacy’ from away.
Date: 27/08/2015 15:27:14
From: mollwollfumble
ID: 767343
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
> This “heat island” effect makes cities about 2 to 5 degrees Fahrenheit warmer than neighbouring suburbs and rural areas.
Nothing to do with asphalt, concrete or porosity.
Everything to do with heat given off by car combustion and air conditioning plants.
P.S. as part of my CSIRO work I calculated the heat island effect of Brisbane’s CBD.
Date: 27/08/2015 15:38:40
From: transition
ID: 767350
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
>Nothing to do with asphalt, concrete or porosity.
I thought A/C etc too, but don’t concrete structures etc absorb, trap (sunight) energy, then the energy is sort of frequency shifted and radiated as IR into the night which which raises the average temperature over day/night cycles
Date: 27/08/2015 15:55:12
From: transition
ID: 767360
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
https://en.wikipedia.org/wiki/Urban_heat_island
The main cause of the urban heat island effect is from the modification of land surfaces, which use materials that effectively store short-wave radiation. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The less-used term heat island refers to any area, populated or not, which is consistently hotter than the surrounding area.
Date: 27/08/2015 16:14:49
From: CrazyNeutrino
ID: 767371
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
transition said:
https://en.wikipedia.org/wiki/Urban_heat_island
The main cause of the urban heat island effect is from the modification of land surfaces, which use materials that effectively store short-wave radiation. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The less-used term heat island refers to any area, populated or not, which is consistently hotter than the surrounding area.
be great if all that wasted heat could be captured in some way
Date: 30/08/2015 04:06:22
From: roughbarked
ID: 768697
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
CrazyNeutrino said:
transition said:
https://en.wikipedia.org/wiki/Urban_heat_island
The main cause of the urban heat island effect is from the modification of land surfaces, which use materials that effectively store short-wave radiation. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The less-used term heat island refers to any area, populated or not, which is consistently hotter than the surrounding area.
be great if all that wasted heat could be captured in some way
Trees do a good job of that but then we all know that.
Date: 30/08/2015 10:51:19
From: wookiemeister
ID: 768740
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
Date: 30/08/2015 10:57:06
From: roughbarked
ID: 768741
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
wookiemeister said:
white paint
too late. It has all been said.
Date: 30/08/2015 12:21:12
From: wookiemeister
ID: 768754
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
roughbarked said:
wookiemeister said:
white paint
too late. It has all been said.
no watering
no maintenance
no root systems tearing up plumbing, foundations
Date: 30/08/2015 12:23:11
From: roughbarked
ID: 768755
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
wookiemeister said:
roughbarked said:
wookiemeister said:
white paint
too late. It has all been said.
no watering
no maintenance
no root systems tearing up plumbing, foundations
You think?
Date: 30/08/2015 12:29:01
From: wookiemeister
ID: 768756
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
roughbarked said:
wookiemeister said:
roughbarked said:
too late. It has all been said.
no watering
no maintenance
no root systems tearing up plumbing, foundations
You think?
just ask the citizens of Angkor wat
Date: 30/08/2015 12:43:29
From: roughbarked
ID: 768757
Subject: re: NASA figured out a surprisingly simple way to cool down hot cities
wookiemeister said:
roughbarked said:
wookiemeister said:
no watering
no maintenance
no root systems tearing up plumbing, foundations
You think?
just ask the citizens of Angkor wat
Did they use white paint? Probably suffered from lack of painting often enough.