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Winter brings less daylight and colder temperatures, which can disrupt sleep. Seasonal Affective Disorder (SAD) is more common in winter due to the lack of sunlight, causing sleep disturbances.
Colder temperatures, especially in winter months, won’t cause a common cold. But they can weaken your immune system, and colder, drier air can help respiratory viruses thrive.
A group can avoid poor decisions that a lone traveler might make. If an emergency occurs, a group can pool its muscle power, brain power, and body heat. Another precaution is informing people outside of the group of the itinerary and expected return time (expected hiking time can be estimated using Naismith's rule).
With humid heat, the moisture in the air can prevent the evaporation of sweat. [21] Regardless of acclimatization, humid heat poses a far greater threat than dry heat; humans cannot carry out physical outdoor activities at any temperature above 32 °C (90 °F) when the ambient humidity is greater than 95%.
Iron and steel, when exposed to winter weather, degrade over time. Freezing rain and temperatures cause these materials to rust and weaken, which can also cause them to break. Wicker Furniture
Insect winter ecology describes the overwinter survival strategies of insects, which are in many respects more similar to those of plants than to many other animals, such as mammals and birds. Unlike those animals, which can generate their own heat internally (endothermic), insects must rely on external sources to provide their heat (ectothermic).
But if you have to embrace the cold weather, these tips will help you stay warm. When the temperature drops, staying inside seems like the obvious option. But if you have to embrace the cold ...
Aestivation (Latin: aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter. Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. [ 1 ]