Nov 02 2013
Tonight we turn the clocks back and gain an hour of sleep.
The rest of nature will stay in the same time zone and on the same circadian rhythm it’s been using for a long time. Our bodies will too. They aren’t going to jog an hour just because we told them to.
This graphic from Wikimedia Commons looks complicated but it shows why this is going to happen. Our bodies have a circadian rhythm that triggers on daylight.
Click on the image to see the original graphic — and larger print — showing our circadian rhythm at the equinox. Since we have only 10.5 hours of daylight right now in Pittsburgh, the top of the graph is probably compressed. Sunrise today is 7:51am (where the graphic says 6:00). Sunset today is 18:15 (where the graphic says 18:00).
But tomorrow morning we will be magically transported to the Rio de Janiero time zone.
Until my circadian rhythm adjusts I’m not going to be myself.
(image by Yassine Mrabet from Wikimedia Commons. Click on the image to see the original)