I'm sorry that I did not answer your second question.

We are all, to some degree affected by the seasons, the sunshine, the weather fronts, the air pressure changes, the shifts in the winds, the rains, etc.

Remember, we have mood swings, we have brain injuries, and they are haywired very much of the time when stressed.

There are conditions, that modern medicine took forever to finally recognize, after years of patients having many psychologic concerns: typically the one that is called Seasonal Affective Disorder.

Other links for you:

S.A.D. - WIKI

S.A.D. - Mayo Clinic

S.A.D. - WebMD

Grey Weather - Grey Mood

There is some literature on "Reverse S.A.D" about Summer Blues, but nothing studied as in depth now like S.A.D. for Fall/Winter.

When I lived and worked in Alaska, I saw many folks dealing with S.A.D. - and thats a time when patients were finding the problems that the Allopaths were arguing did not exist - and Antidepressants at that time offered very little, but those lights were new at the time - at least not thought of as therapy, in the mid-eighties, and many had little indoor gardens and spent hours in with their plants, with the special ordered lights and felt very well from those hours of lighting and reading with their plants.

Best Wishes.