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Barrow, Alaska, (Utqiaġvik) Sees Last Sunset For Next 83 Days

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Point Barrow was named after Sir John Barrow of the British Admiralty by explorer Frederick William Beechey in 1825. In an October 2016 referendum, city voters narrowly approved to change its name from Barrow to its traditional Iñupiaq name, Utqiaġvik



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aerial photo of landfast ice

AT A GLANCE

At 2:12 a.m. ADT Saturday, America's northernmost city saw the sun set for the last time until Aug. 2, ushering in an 83-day period during which areas north of the Arctic Circle never see the sun dip below the horizon.

During the northern hemisphere's spring and summer, the sun's most direct rays shine over areas between the equator and Tropic of Cancer, about 23.5 degrees north latitude.

Because the northern hemisphere tilts toward the sun in the spring and summer, areas north of the Arctic Circle – within 23.5 degrees of the North Pole – experience more than two months with the sun never dipping below the horizon, evoking the popular phrase "Land of the Midnight Sun"

Despite all this possible sunshine, Barrow's average highs reach a yearly peak of only 47 degrees in July, thanks to not only the northern latitude but to its proximity to the Arctic Ocean, which is covered in ice near the coast for much of the year. Barrow experiences 187 cloudy days a year, according to data from the National Climatic Data Center, because of dominant east winds off the ocean.

From mid-November through late January, the sun doesn't rise north of the Arctic Circle, due to the tilt of the Earth away from the sun's most direct radiation.

The opposite of this occurs from mid-November through late January, when the sun doesn't rise for roughly two months north of the Arctic Circle. In Barrow, this polar night will occur with the last sunset Nov. 19 until the sun pops above the horizon again Jan. 23.

It is a common misconception that Barrow and areas north of the Arctic Circle are completely dark during this period.

Civil twilight, defined as the point when the sun is 6 degrees below the horizon, allows sufficient light to see objects outside. This civil twilight period is about six hours long near the beginning and ending of polar night, but shrinks to about three hours in the heart of the polar night just before Christmas.


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