Ultraviolet rays (UV radiation): represent 7%. Visible rays (VI): represent 43% of radiation and provide light. Infrared rays (IR): Infrared radiation provides heat and represents 49% of solar radiation. Solar radiation is made up of the following types of radiation: On average, the value of the solar constant is 1.366 W / m2. Electromagnetic radiation propagates in space at the speed of light (299,792 km / s).Ī singular value is the solar constant the solar constant is the amount of radiation received instantly per unit area in the outer part of the earth's atmosphere in a plane perpendicular to the solar rays. Nuclear radiation produces electromagnetic radiation at various frequencies or wavelengths. Nuclear fusion reactions take place in the solar nucleus and are the source of the Sun's energy. Likewise, solar irradiance is the power received in an instant - it is expressed in watts per square meter (W/m2) Solar irradiation is the energy received per unit area (J/m2), the power received in a given time. When we speak about the amount of solar energy reaching the surface of our planet, we use irradiance and irradiation concepts. The CERES data are used by the climate, weather and applied science research communities to address a range of research topics that involve the exchange of energy between the Earth and space and between the major components of the Earth system.ĬERES is the only project worldwide whose prime objective is to produce global climate data records of ERB from instruments designed to observe the ERB.Solar radiation definition: it is the energy emitted by the Sun in interplanetary space. The CERES data products capture variations in ERB at hourly, daily and monthly timescales and at spatial scales ranging from 20 km to global. The CERES instruments provide direct measurements of reflected solar radiation and emission of thermal infrared radiation to space across all wavelengths between the ultraviolet and far-infrared.ĬERES measurements, together with measurements from higher-resolution imagers on polar orbiting and geostationary satellites, are used along with other input data sources to produce data products that describe the ERB at the top-of-atmosphere, within the atmosphere and at the surface. Since then, CERES instruments have launched aboard the Terra, Aqua, Suomi National Polar-orbiting Partnership (S-NPP) and NOAA-20 satellites. The CERES team has been collecting ERB data since 1997, when the first CERES instrument was launched aboard the Tropical Rainfall Measuring Mission (TRMM) satellite.
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