4 ms·

Would planting trees and a lot of irrigation not help make a difference? Money doesn't appear to be a big issue there.

deleted 7y ago
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lmilcin 7y ago
Actually, trees have lower albedo than sand meaning, they reflect less sun energy back to space. Also, trees do not help if you get hit by a wave of 50C desert air. Also, the drynes of air in arabic countries is actually their saving. The only way for a human being to be able to survive outside in air hotter than 35C is if the air is dry so it is possible to cool by sweat evaporating.
- hcarvalhoalves 7y ago
  > The only way for a human being to be able to survive outside in air hotter than 35C is if the air dry You’re exaggerating. Where I and other 12 million people live it’s often 35C+ and ~60% humidity.
  - zaroth 7y ago
    It’s also extremely humid in Qatar according to TFA.
  - lmilcin 7y ago
    Above 35C air temperature human body cannot remove heat any other way than through evaporation of sweat. At 46C you need air that is less than 50 percent humid to even survive. And this means you can only lie flat in shade and breath, any more exertion and you cook from inside. For anybody to survive outside in 46C air and additionally you want to exert yourself in any way like walking the air must be very dry. If you are still not convinced just read up a little bit, https://www.google.com/url?sa=t&source=web&rct=j&url=https://insideclimatenews.org/news/02082017/heatwaves-deadly-heat-humidity-wet-bulb-human-survivability-threshold%3Famp&ved=2ahUKEwi616frlqblAhXqkIsKHTDfDvsQFjAKegQIBRAB&usg=AOvVaw0LHK8xKmhTzGiTiw8gl_Vs&ampcf=1 https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...
  - jellicle 7y ago
    Commenter is talking about the wet bulb temperature, which is basically the temperature at maximum humidity. Qatar is running about 32 degrees maximum wet bulb temperature, which is still barely survivable, but a couple more degrees and living without AC in Qatar will be unsurvivable for humans.
  - trickstra 7y ago
    It's called wet-bulb temperature - it's measured by a thermometer whose bulb is covered by fabric and water slowly drips on it. It shows how much can evaporation (sweating) help to cool us down in those particular weather conditions. If the humidity is 100%, the wet-bulb temperature will be equal to the normal temperature - because evaporation stops, therefore no cooling effect. And if the wet-bulb temperature is more than our body temperature, we are overheating. So air temperature over 37 degrees with 100% humidity is indeed potentially lethal.
- jjav 7y ago
  > The only way for a human being to be able to survive outside in air hotter than 35C is if the air is dry so it is possible to cool by sweat evaporating. Spend some time in the tropics to easily disprove that misconception. Having grown up in the caribbean where it is often more than 35C (95F) and quite humid, I'm still alive. (Also, never had air conditioning, couldn't afford it.)
  - deleted 7y ago
    [deleted]

deleted 7y ago

[deleted]

Actually, trees have lower albedo than sand meaning, they reflect less sun energy back to space. Also, trees do not help if you get hit by a wave of 50C desert air. Also, the drynes of air in arabic countries is actually their saving. The only way for a human being to be able to survive outside in air hotter than 35C is if the air is dry so it is possible to cool by sweat evaporating.

hcarvalhoalves 7y ago
> The only way for a human being to be able to survive outside in air hotter than 35C is if the air dry You’re exaggerating. Where I and other 12 million people live it’s often 35C+ and ~60% humidity.
- zaroth 7y ago
  It’s also extremely humid in Qatar according to TFA.
- lmilcin 7y ago
  Above 35C air temperature human body cannot remove heat any other way than through evaporation of sweat. At 46C you need air that is less than 50 percent humid to even survive. And this means you can only lie flat in shade and breath, any more exertion and you cook from inside. For anybody to survive outside in 46C air and additionally you want to exert yourself in any way like walking the air must be very dry. If you are still not convinced just read up a little bit, https://www.google.com/url?sa=t&source=web&rct=j&url=https://insideclimatenews.org/news/02082017/heatwaves-deadly-heat-humidity-wet-bulb-human-survivability-threshold%3Famp&ved=2ahUKEwi616frlqblAhXqkIsKHTDfDvsQFjAKegQIBRAB&usg=AOvVaw0LHK8xKmhTzGiTiw8gl_Vs&ampcf=1 https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...
- jellicle 7y ago
  Commenter is talking about the wet bulb temperature, which is basically the temperature at maximum humidity. Qatar is running about 32 degrees maximum wet bulb temperature, which is still barely survivable, but a couple more degrees and living without AC in Qatar will be unsurvivable for humans.
- trickstra 7y ago
  It's called wet-bulb temperature - it's measured by a thermometer whose bulb is covered by fabric and water slowly drips on it. It shows how much can evaporation (sweating) help to cool us down in those particular weather conditions. If the humidity is 100%, the wet-bulb temperature will be equal to the normal temperature - because evaporation stops, therefore no cooling effect. And if the wet-bulb temperature is more than our body temperature, we are overheating. So air temperature over 37 degrees with 100% humidity is indeed potentially lethal.
jjav 7y ago
> The only way for a human being to be able to survive outside in air hotter than 35C is if the air is dry so it is possible to cool by sweat evaporating. Spend some time in the tropics to easily disprove that misconception. Having grown up in the caribbean where it is often more than 35C (95F) and quite humid, I'm still alive. (Also, never had air conditioning, couldn't afford it.)
- deleted 7y ago
  [deleted]