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The earliest sunset… — 7 Comments

  1. Conversely, the latest sunrises in the mid-latitudes occur in early January. Ergo, in late December both sunrises and sunsets are becoming later even as the Solstice is the shortest day of the year.

    When you get down into the tropics, the earliest sunsets become even earlier, i.e., in November. And close to the equator, it’s even stranger, with the times going up and down an additional cycles, although the overall day length changes little.

  2. Being just SW of Boston in Ct, this is a very depressing time of year for me. I definitely think I have a mild case of SAD. And as I’ve grown older my tolerance of cold and snow has gone way down. New England winters are just not bearable anymore. Retirement in 2 1/2 years and then it’s time to head south.

  3. We lived in Africa, within a few degrees (less than 8 degrees in 3 different countries) for many years. As in 15 years.

    The most noticeable thing about sunset near the equator is that it happens fast. There is no “twilight”. The sun goes down, and 15 minutes later it’s dark.

  4. Despite years of training as a farm boy and bringing home the bacon, I switched from an early riser to a late sleeper about 15 years ago. Mrs parker wakes me at around 9 am. Early sunsets are not one of my favorite things, but the darkness and cold of winter has aspects that I savor. Winter is a quiet time, there is beauty in the bright blue sky and the clear star filled nights (when they occur), and winter is my favorite time to play chef as warm meals in a warm abode is something to be savor.

    Today it was sunny and the high was 9 with wind chill of minus 4. Tonight it will be minus 4 with wind chill minus 15-20. I do the night time dog walk and it will be cold, quiet, and lots of stars over head. There is beauty to be appreciated in every season.

  5. If you have a globe and a flashlight, you can visually understand it better- it is hard to explain it verbally- at least the effect of the Earth’s tilt on either side of solstice in relation to where a point is on the globe is at sunrise and sunset. I wasn’t aware of the effect of the oblong orbit, and it isn’t something I can even visualize right now- will have to read the article.

    I actually only recently noticed this myself just a few weeks ago when I was trying to determine the length of the day on the Winter Solstice for Oak Ridge. When I looked at the table of sunrise and sunset, it surprised me that the days didn’t shorten and lengthen symmetrically on either side of the date.

  6. You can get a table of sunrise/sunset times for your location for an entire year from the US Naval Observatory at http://aa.usno.navy.mil/data/docs/RS_OneYear.php.

    Part of the discrepancy – that the latest sunrises and earliest sunsets don’t align with the winter solstice – is that the Earth is in an elliptical orbit; the Earth is moving fastest at the perihelion, about January 4 each year. Curiously for us Northern Hemisphere denizens, the Earth is closest to the Sun on that date, January 4. (Fortunately, the difference is only about 3%.)

    Winter Blues or “Seasonal Affective Disorder” can be easily treated with a bank of fluorescent lights; get up 30 minutes earlier and sit under the lights. I use a combination of regular tubes and “full spectrum” tubes. Don’t use these in the evening; they’ll prevent you from falling asleep naturally.

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