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> It's relatively simple (though not necessarily easy) to live in a cold area if you have access to furs and fuel. there must be a reason why the coldest areas

> It's relatively simple (though not necessarily easy) to live in a cold area if you have access to furs and fuel. there must be a reason why the coldest areas on the Planet are deserted... > Trying to survive in an area where the wet bulb temperature is over 35 degrees And yet ancient Egyptians did it 4 thousands years ago. > That reads as gibberish My phone has an Italian dictionary. Fixed it.

ndsipa_pomu 3y ago
> And yet ancient Egyptians did it 4 thousands years ago. Have you any evidence of Egypt having those kinds of wet bulb temperatures back then? It's physically impossible to survive high wet bulb temperatures even with an unlimited supply of water without some other form of cooling (i.e. not based on air movement such as fans) as water/sweat evaporation isn't effective. From https://en.wikipedia.org/wiki/Wet-bulb_temperature https://en.wikipedia.org/wiki/Wet-bulb_temperature: > Even heat-adapted people cannot carry out normal outdoor activities past a wet-bulb temperature of 32 °C (90 °F), equivalent to a heat index of 55 °C (131 °F). A reading of 35 °C (95 °F) – equivalent to a heat index of 71 °C (160 °F) – is considered the theoretical human survivability limit for up to six hours of exposure.
- iamegypt 3y ago
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  - ndsipa_pomu 3y ago
    Those figures that you quote are not wet bulb temperatures. https://en.wikipedia.org/wiki/Wet-bulb_temperature https://en.wikipedia.org/wiki/Wet-bulb_temperature > The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked (water at ambient temperature) cloth (a wet-bulb thermometer) over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature); at lower humidity the wet-bulb temperature is lower than dry-bulb temperature because of evaporative cooling.
    - deleted 3y ago
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    - iamegypt 3y ago
      [flagged]
- peoplefromibiza 3y ago
  > Have you any evidence of Egypt having those kinds of wet bulb temperatures back then? Have you got evidence of climate change causing those kinds of wet bulb temperatures in large populated areas?
  - ndsipa_pomu 3y ago
    From https://www.theguardian.com/science/2022/jul/31/why-you-need-to-worry-about-the-wet-bulb-temperature https://www.theguardian.com/science/2022/jul/31/why-you-need...: > One 2015 study concluded extremes are likely to approach and exceed 35C in the region around the Arabian Gulf towards the end of the century if greenhouse gas emissions are not reined in, posing questions for human habitability there. > In 2020, research found that some coastal subtropical locations have already experienced WBTs of 35C, albeit only for a few hours. > “Previous studies projected that this would happen several decades from now, but this shows it’s happening right now,” said lead author Colin Raymond, a climate scientist at Nasa’s Jet Propulsion Laboratory. “The times these events last will increase and the areas they affect will grow in direct correlation with global warming.” > The study also found that globally, the number of times that a WBT of 30C was reached – still considered an extreme humidity and heat event – more than doubled between 1979 and 2017. There were about 1,000 occurrences of a 31C WBT, and about a dozen above 35C, in Pakistan, India, Saudi Arabia, Mexico and Australia. There's some recent information and investigation here too https://www.washingtonpost.com/climate-environment/interactive/2023/extreme-heat-wet-bulb-globe-temperature/ https://www.washingtonpost.com/climate-environment/interacti...
    - peoplefromibiza 3y ago
      not evidence of something that would kill hundred of millions of humans. But, more importantly, The oft-cited 35C value comes from a 2010 theoretical study. Simply put: nobody knows the real threshold and nobody put it to test. I'm no denier in any way, but doom prophecies are usually wrong, they are used to scare people into action, but are based on the idea that nothing changes. For example, planting trees is effective against heat waves, it's cheap and it's being done extensively, everywhere you look China will aim to plant and conserve 70 billion trees by 2030 as part of the global tree movement

ndsipa_pomu 3y ago

> And yet ancient Egyptians did it 4 thousands years ago. Have you any evidence of Egypt having those kinds of wet bulb temperatures back then? It's physically impossible to survive high wet bulb temperatures even with an unlimited supply of water without some other form of cooling (i.e. not based on air movement such as fans) as water/sweat evaporation isn't effective. From https://en.wikipedia.org/wiki/Wet-bulb_temperature https://en.wikipedia.org/wiki/Wet-bulb_temperature: > Even heat-adapted people cannot carry out normal outdoor activities past a wet-bulb temperature of 32 °C (90 °F), equivalent to a heat index of 55 °C (131 °F). A reading of 35 °C (95 °F) – equivalent to a heat index of 71 °C (160 °F) – is considered the theoretical human survivability limit for up to six hours of exposure.

iamegypt 3y ago
[flagged]
- ndsipa_pomu 3y ago
  Those figures that you quote are not wet bulb temperatures. https://en.wikipedia.org/wiki/Wet-bulb_temperature https://en.wikipedia.org/wiki/Wet-bulb_temperature > The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked (water at ambient temperature) cloth (a wet-bulb thermometer) over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature); at lower humidity the wet-bulb temperature is lower than dry-bulb temperature because of evaporative cooling.
  - deleted 3y ago
    [deleted]
  - iamegypt 3y ago
    [flagged]
peoplefromibiza 3y ago
> Have you any evidence of Egypt having those kinds of wet bulb temperatures back then? Have you got evidence of climate change causing those kinds of wet bulb temperatures in large populated areas?
- ndsipa_pomu 3y ago
  From https://www.theguardian.com/science/2022/jul/31/why-you-need-to-worry-about-the-wet-bulb-temperature https://www.theguardian.com/science/2022/jul/31/why-you-need...: > One 2015 study concluded extremes are likely to approach and exceed 35C in the region around the Arabian Gulf towards the end of the century if greenhouse gas emissions are not reined in, posing questions for human habitability there. > In 2020, research found that some coastal subtropical locations have already experienced WBTs of 35C, albeit only for a few hours. > “Previous studies projected that this would happen several decades from now, but this shows it’s happening right now,” said lead author Colin Raymond, a climate scientist at Nasa’s Jet Propulsion Laboratory. “The times these events last will increase and the areas they affect will grow in direct correlation with global warming.” > The study also found that globally, the number of times that a WBT of 30C was reached – still considered an extreme humidity and heat event – more than doubled between 1979 and 2017. There were about 1,000 occurrences of a 31C WBT, and about a dozen above 35C, in Pakistan, India, Saudi Arabia, Mexico and Australia. There's some recent information and investigation here too https://www.washingtonpost.com/climate-environment/interactive/2023/extreme-heat-wet-bulb-globe-temperature/ https://www.washingtonpost.com/climate-environment/interacti...
  - peoplefromibiza 3y ago
    not evidence of something that would kill hundred of millions of humans. But, more importantly, The oft-cited 35C value comes from a 2010 theoretical study. Simply put: nobody knows the real threshold and nobody put it to test. I'm no denier in any way, but doom prophecies are usually wrong, they are used to scare people into action, but are based on the idea that nothing changes. For example, planting trees is effective against heat waves, it's cheap and it's being done extensively, everywhere you look China will aim to plant and conserve 70 billion trees by 2030 as part of the global tree movement