Earth's temperature will exceed the stamina of humans

One of the worst scenarios of a warm climate has recently been drawn by scientists at the University of New South Wales (Australia): the Earth's temperature may exceed human tolerance, if the level The increase of greenhouse gas emissions continues as it is today.

Conclusions from a study published by Professors Matthew Huber and Steven Sherwood in the Proceedings of the National Academy of Sciences in March 3-5.

The map shows the highest 'wet bulb temperature' (Tw) achieved in a climate model, with greenhouse gas emissions causing the Earth's temperature to rise to 12 ^° C compared to 2007. White area are places where the heat can cause a lot of stress for people - Photo: Purdue Institute

Like a 42 ^o C fever for hours .

For the first time, the researchers measured the highest 'wet bulb temperature' (Tw), the human body can withstand and detect this temperature will be overcome in the future, if the level of greenhouse gas emissions continues today.

Tw is the temperature we feel when wet skin is exposed to the wind. It includes the temperature and humidity of the air, measured by covering a wet thermometer with a wet cloth and continuously fanning the thermometer. That way, the researchers calculated that most humans and mammals with a body temperature of about 37 degrees C would be hurt by the heat when Tw was above 35 degrees Celsius for six consecutive times. Better time (similar to a body with a fever of 42 ⁰ C). Usually Tw rarely exceeds 31 ⁰ C.

Explain more about this result, research co-author - Professor Steven Sherwood of the Center for Climate Change Research at the University of New South Wales, said that when people rest, they still produce energy from activity metabolically. When it is too hot, the body will cool itself by sweating to dispel the heat. To this end, the surrounding air must be cooler than the skin and the skin must be cooler than the original body temperature. Cooler skin helps absorb excessive heat from the body, discharging them into the environment. If Tw is hotter than the skin's temperature, the heat of metabolism cannot be released and if prolonged for many hours it will be fatal.

Will come in the next century?

Professor Huber said: 'Although today in some parts of the world the air temperature is sometimes above 40 ⁰ C, but Tw is really high rarely. The reason is that the hottest regions in the world often have low humidity, typically 'dry heat' like in Arizona. When it's dry, we can cool our body by sweating and thus keep the body relatively comfortable.

The highest recorded places for Tw are in areas near the coast of Saudi Arabia, where the wind often carries the hot, moist air of the ocean into the land, making the atmosphere extremely difficult to breathe. Fortunately, these moments do not last long . However, if this heat hits places with high humidity, the consequences will be fatal.

The study said that the intense heat required great efforts to adapt. The use of more air-conditioners led to a dramatic increase in electricity consumption, a problem for third world countries. It also makes any outdoor labor work dangerous.

These deadly temperatures, according to researchers at the University of New South Wales, have never happened during the life of mankind, but happened 50 million years ago. According to them, this deadly heat could come in the next century, if the greenhouse gas emissions continue today.

Source: RedOrbit News