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Sunshine duration. Sunshine duration or sunshine hours is a climatological indicator, measuring duration of sunshine in given period (usually, a day or a year) for a given location on Earth, typically expressed as an averaged value over several years. It is a general indicator of cloudiness of a location, and thus differs from insolation, which ...
For example, with an axial tilt is 23°, and at a latitude of 45°, then the summer's peak sun angle is 68° (giving sin(68°) = 93% insolation at the surface), while winter's least sun angle is 22° (giving sin(22°) = 37% insolation at the surface). Thus, the greater the axial tilt, the stronger the seasons' variations at a given latitude.
October 17, 2024 at 11:54 AM. Fall is in full swing, but it’s not too soon to look ahead to winter, especially one that could feel considerably different than last year’s dominated by El Niño ...
In fact, under clear skies a solar panel placed horizontally at the north or south pole at midsummer receives more sunlight over 24 hours (cosine of angle of incidence equal to sin(23.5°) or about 0.40) than a horizontal panel at the equator at the equinox (average cosine equal to 1/ π or about 0.32).
Last winter, Kansas City measured only 8.8 inches of snow, less than half of the typical snowfall totals for an entire winter. This year, AccuWeather meteorologists say that between 12 and 20 ...
Alaska. The National Weather Service office in Juneau issued a winter storm warning for the Skagway and White Pass areas of the state. Heavy snow with accumulations of up to 9 inches is expected ...
In terms of energy, sunlight at Earth's surface is around 52 to 55 percent infrared (above 700 nm), 42 to 43 percent visible (400 to 700 nm), and 3 to 5 percent ultraviolet (below 400 nm). [7] At the top of the atmosphere, sunlight is about 30% more intense, having about 8% ultraviolet (UV), [ 8 ] with most of the extra UV consisting of ...
NOAA fall forecast for New York. The National Weather Service forecasts a 40% to 50% chance of above-average temperatures across all of New York state this fall, covering October, November, and ...