What is ‘Wind Chill’?
The core temperature of a human body is around 37C. The air around us is usually cooler than this and so we lose body heat, particularly from exposed skin.
Wind chill is the term that describes this heat loss, and the increased effects of low temperatures and wind.
When wind blows across the surface of exposed skin it will remove heat from that surface, making us feel colder than we would in still conditions. Wet skin and wet clothing will exacerbate the problem, as the rate of heat loss increases from wet surfaces.
The body compensates by sending more warm blood to heat the surface layers, eventually reducing our core temperature and risking hypothermia, (see our previous blog on hypothermia).
|Well prepared for the icy conditions in the Wicklow mountains.|
How do we deal with it?
We need to reduce the heat loss from our bodies, and the best way to do this is to wear insulating layers of windproof and waterproof clothing.
Waterproof shell jackets are also windproof and the addition of an insulating layer beneath will keep our body warm.
A warm hat is a must, keep it dry by raising the hood on your jacket. Keep your hands warm by wearing gloves, and carry a spare pair to change in to if they get wet.
You can help your body to generate heat by keeping energy levels high, eat regular high calorie snacks and take hot drinks with you on your hike.
It is important to be aware of the potentially dangerous effects of wind chill, and carry appropriate clothing to keep you comfortable, warm and safe when hiking in the winter months.