About Cold..

About Cold..

I woke up early today and went out with my husky. The temperature was showing -11 degrees. It has become winter, nice:-). So what would fit better than the cold as todays topic.

Today it will be about research of cold..

One important knowledge will be to understand how cold works in real, and how we can learn more about it. In normally condition the temperature will decrease accordingly in relation to heights. But during the winter period the condition can be reverse. with no wind an cold weather we got a situation called inversion. It then forms two layers in the air, a cold one down in the walleyes and warmer on the higher areas. It is easy to discover if there is smoke, it will raise and then widen on one level.

Inversion, can be good to know about. If you want to get away from the cold,, you now know were to go..

The layers cant be passed, so the smoke widen out. At the peaks the temperature will be warmer, which as well is important to take in consideration about avalanche factors as well..

When it comes to cold and how it will impact us as humans there has been a lot of research about the topics. One of the areas is the chill effect from the wind, in combination with the temperature. In 1940 the researcher Paul simple and Charles Passel did a test with a cylinder and measured how fast the water was frozen in it. The researcher went on to measure how long time it would take for 250g water in a plastic cylinder to freeze in different wind speed and temperature. However this research had shortcomings. It did not take into account the human skin. But in 2001 the American Randall Osczevski and the Canadian Maurice Bluestein defined a new formula. And this time the research was based on how people responded to different wind-cooling levels.

How will the wind and temperature affect a human?

With the new method, an output temperature of -20 celsius combined with a wind of 10 m / s gave a wind-cooling of -34 celsius degrees, while the Siples formula gave the value -44 celsius degrees. The new method, on the other hand, gave a greater wind cooling at weak winds just over the wind, 1.8 m / s. Wind tuning was chosen here at 0.5 m / s and therefore the formula can not be applied to winds below this.

So this is the ground we based the wind chill effect today.

But cold could also be good. In Finland another research team figured out when they used a test team for winter bathing, the health effect of cold. They find out that people who did a weakly winter bath, could show a better health. Less tension, headaches, fatigue bad memory and bad mood was a clear result. The ones in the team who suffered from rheumatism, fibromyalgia and asthma the winter bath has relived the pain.