Energy that reaches the Earth in the form of radiation from the Sun. Of the total energy reaching the Earth calculated from the solar constant, only about two-thirds of it reaches the Earth's surface in the form of solar radiation due to absorption by the atmosphere, averaging 0.9 kW per m2 . Of this, about 47% is consumed by long wavelengths from the sea surface, lake surface, and ground, about 20% is consumed in heat transfer to the atmosphere, and only about 0.2% is used for the growth of plants (including plankton) on land and in the sea. Source : Heibonsha Encyclopedia About MyPedia Information |
太陽から放射の形で地球に到達するエネルギー。太陽定数から計算される全到達エネルギーのうち,日射の形で地表に到達するのは大気による吸収などのためその約3分の2で,平均して1m2当り0.9kWになる。このうち約47%が海面,湖面,地面からの長波長に,約20%が大気への熱伝達に消費され,陸上,海中の植物(プランクトンも含め)の生育に使われるのは0.2%程度にすぎない。
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