大氣中的輻射ppt課件(參考版)
2025-01-17 13:48本頁面
【正文】 Lord Rayleigh (John William Strutt 18421919)英國物理學家1871： Rayleigh Scattering光學聲學電學熱力學1904 Nobel Prize（ 1）瑞利散射（ 2）米散射 (大顆粒散射 )假設(shè)：粒子是球體；介質(zhì)均勻球狀粒子的散射特性取決于粒子的相對尺度數(shù) a和 粒子介質(zhì) 復折射指數(shù) m 。 n is responsible for scattering. k is responsible for absorption. If k is equal to 0 at a given wavelength thus a particle does not absorb radiation at this wavelengthSome refractive indices of atmospheric aerosol substances at l = ?m. Substance n kWater 0Hematite Elemental carbon Organic carbon 0NaCl(s) 0H2SO4(aq) 0NH4HSO4(s) 0(NH4)2SO4(s) 0SiO2 0NOTE: hematite (赤鐵礦 ) is a mineral that is a main light absorbing ponents of mineral dust.2．散射削弱系數(shù)2．散射削弱系數(shù)Imaginary part of the refractive indexes of some aerosol materialsNote: Main absorbing species in the SW are black carbon (Soot) and Hematite (dust), but in the LW various species have high imaginary parts of the refractive index. But overall absorption (., absorption coefficients) is also controlled by particle size2．散射削弱系數(shù)（ 1）瑞利散射（ 1）瑞利散射散射削弱系數(shù)與波長的 4次方成反比，波長越短，分子散射削弱越強。 若單位體積中有 N 個相同的顆粒，則總散射掉的輻射能為 ENss。如大雨滴對可見光的折射、反射。162。162。 當 α1時： Rayleigh散射，也稱分子
教學課件相關(guān)推薦
鄂ICP備17016276號-1