Wednesday, January 10, 2007

There's a darkness on the edge of town

Almost forgot to mention: Days seem very short in Seattle, and the mornings very dark, even taking into account the overcast skies. It turns out this is real, not perceived. Sunrise today in Seattle is at 7:56am, a full 41 minutes later relative to the clock than in Champaign. The sun there sets at 4:38pm, eight minutes before here, too. That's 49 minutes less daytime, which is pretty significant.

By the way, just so everyone's clear, the length of the day is determined by your latitude and the date. Seattle is at 47.6 N, Champaign at 40.1 N, or about 15% of the way toward the equator from them. Have no fear, though, these things always even out. In this case, they'll get longer days in the summer by the same margin as they come up short in winter. The big difference between sunrise times in the morning and smaller margin in sunsets just reflects where the cities are in relation to the time zone boundaries. We're in the eastern part of the time zone, which tends to make timed events occur earlier, whereas they're more centrally located.

3 comments:

Megan Case said...

Bah. Here at 60 degrees north the sun rose today at 9:00 and set at 2:30. Though the pre-dawn and the twilight last for hours.

jfaberuiuc said...

Ouch. Oddly enough, Seattle doesn't seem to get much pre-dawn twilight at all, probably because it's hidden by the Cascade mountains. Is it sunny, at least?

Megan Case said...

It's often very cloudy. Some days it seems like it wasn't day at all, just a lighter shade of gray for a little while. Luckily, my schedule isn't too demanding, so I can sleep a lot. (Maybe that's WHY the Swedish student schedule isn't very demanding.)

We should have lots of snow by now to brighten things up, but thanks to global warming, there isn't any.

 

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