There is an ailment called Seasonal Affective
Disorder (SAD). It usually strikes individuals in
the summer or winter. For example, if someone is
used to California sun year round, then that
person would be susceptible to SAD if she actually
experienced a season that has less sun than she is
used to having at that time of year. For example,
a person moving to Michigan would have snow in
winter, but even rain is sparse in Santa Barbara
during the winter.
There might be a
physiological basis to this psychological ailment.
Our bodies have a daily cycle that they go
through, and this is usually driven by sun light.
When an individual is deprived of that light, then
he might have some ailment. As you can guess,
people have tried light therapy to overcome SAD.
That varies a lot depending on who we are
talking about; different people respond to weather
differently. Generally speaking, humans will be
happier if the weather is to their liking. Weather
that results in low light and is wet tends to make
people feel sleepy, while in the sun they will be
more energetic. Some people like it hot, and some
like it cold. Some people don't mind humidity,
while others prefer dryness. It all varies from
person to person.
As a note, people do seem
to need natural light -there is something about
the basically white color and the intensity of
daylight that is necessary for mental health.
People who live in the far north where winters are
a perpetual twilight or just plain dark tend to
have very high suicide rates because of it.
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