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单词 insolation
释义
insolation

Physics
  • (from incoming solar radiation) The solar radiation that is received at the earth’s surface per unit area. It is related to the solar constant, the duration of daylight, the altitude of the sun, and the latitude of the receiving surface. It is measured in MJ m−2.


Astronomy
  • The amount of energy from the Sun that falls on a surface. The insolation at the top of the Earth’s atmosphere is termed the solar constant.


Geology and Earth Sciences
  • The amount of incoming solar radiation that is received over a unit area of the Earth’s surface. Solar energy received over the planet’s surface varies according to season, latitude, transparency of the atmosphere, and aspect or ground slope. On average, equatorial areas receive approximately 2.4 times as much insolation as polar areas.


Geography
  • The solar radiation hitting the Earth’s surface. Global variations in insolation are critical in the general circulation of the atmosphere. ‘Climatic changes result from variables in planetary orbits which modulate solar energy emission and change seasonal and latitudinal distribution of heat received by the Earth. Small insolation changes are multiplied by the albedo effect of the winter snow fields of the Northern Hemisphere, by ocean-atmosphere feedbacks, and, probably, by the stratospheric ozone layer’ (Kukla (1972) Boreas 1, 1). Insolation forcing functions include the eccentricity of the Earth’s orbit, the angle from the vernal equinox to perihelion, obliquity, and time (Huybers (2011) Nature 480, 229).


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