大气中臭氧9.6μ带辐射收支的计算
RADIATIVE HEAT TRANSFER DUE TO THE 9.6 MICRONBAND OF OZONE
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摘要: 计算大气中的长波辐射时,吸收气体的光学厚度要作气压订正,一般取气压订正后的光学厚度u'=u(p/p0)K,对于O3的9.6μ带,理论分析和实验都表明K是u和p的函数,气压订正可取u'=u(p/p0)K(u,p)=uf(u,p). 我们以Walshaw的实验为基础,求出f(u,p)的囹形,并求出辐射通量及辐射通量散度的计算表。当u很小时,弱线近似成立。漫射辐射的吸收率Af=1-exp(-2su/d),K→0。在u→0时,dAf/du=2s/d为一常量。Abstract: For 9.6,u band of ozone theory and experimental results show that the pressurecorrection(p/p0)K for optical length a of absorbing gas is a function of fr and u. The pressure-correction f(u,p)=(p/p0)K is determined from experimental results. The mean slab absorptivity Af(U') and dAf(U')/du' of this band is computed When a is small, weak line approximarion is valid,Af=1-exp(-2su/d),f(u,p)=1. The pressure-correction for du' in calculating radiative divergence dFz/du' should be unity, and dAf(U')/du' approaches a constant value 2s/d.
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