Sun Protection
Ken Murray
Joined: 05 Apr 2004
Posts: 90
Location: Studio City (LA)
Posted: Mon Apr 04, 2005 12:01 pm
Post subject: Sun Protection
Some folks that are new to the alpine environment, are unaware
of the potential problems due to sun exposure. Because we are
higher in the atmosphere, there is less air to absorb UV
radiation, and so we are hit with a larger dose, for the same
time exposure.
The Canadian Dermatology Association makes this interesting
observation:
"The UV index actually tends to peak in May and June on bright
days. When the temperature is relatively low, most people
don’t think about the potential for sunburns, as they are not
hot."
As we ascend in the atmosphere, we lose protection. For
example, if it were to take an hour at sea level to begin to
get a sunburn, on top of Mt. Whitney (~14,500 ft), it will
take less than 10 minutes!!
Remember that we will be out for the worst part of the day,
for several hours.
Recommendations vary, but a sunscreen of at least SPF 15
should be used.
What many people don't know, is that the majority of
sunscreens are rapidly absorbed into the skin, which tends to
be dry at elevation, and so, does little good. It is
recommended that you place a second coating of sunscreen on,
after about 20 minutes, to replace that which is gone. This
will make any sunscreen twice as effective.
Treatment of sunburn is not fun, but I've found the best
products are aloe vera based, preferrably refridgerated,
applied several times/hour.