In high altitudes and in winter, the sun's UV rays are increased. Exposure is increased because of the decreased atmosphere and because the UV rays reflect and/or bounce off the snow. When elevation increases so does the sun's strength. The thinner atmosphere absorbs less UV rays, allowing them to pass
through to the Earth much easier and with much more power, this greatly
increases the risk of exposure. When living or vacationing in high altitudes, it is extremely important that you take extra precautions to protect yourself from the sun's harmful UV rays. UVA rays, account for up to 95 percent of UV rays that
reach the Earth’s surface, they penetrate deeper into skin, cause wrinkles, and are the culprit for melanoma, the most deadly skin cancer. In the winter, many places have an abundance of snow, when the sun's UVA rays bounce off the snow it creates an effect similar to being at the beach. These rays can be very intense and act the same throughout the year penetrating clouds and even glass. Even just a few minutes of sun exposure during the day, overtime, these minutes add up and can cause noticeable changes to the skin, such as freckles, age spots, spider veins on the face, blotchy complexion, and fine wrinkles. According to Sonya Dakar Skin Clinic, "UVA rays are not affected by changes in temperature and will penetrate
deep into skin layers, potentially causing long-term damage to the
skin". From repeated exposure to the sun's harmful rays, this photo aging process is inevitable and the only way to prevent it is by shielding yourself from the sun. Use a stronger sunblock during the winter months and in higher altitude. Avoid direct sunlight, seek shade when the sun is hottest and wear protective clothing, hats and sunglasses.

FACTS FOR THOUGHT - According to Sonya Dakar Skin Clinic
Higher altitudes mean dramatically more UV radiation -
For every 1,000 feet you climb in altitude, UV radiation increase 4%.
This fact is especially important to all you skiers and snow boarders
wearing just a knit stocking cap. Both brimmed winter sun hat and broad
spectrum face sunscreen is crucial to your sun safety.
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