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Retrieval of Ozone Profile from Limb Scatter Measurements Using Differential Optical Absorption Spectroscopy (DOAS)

Author: YangChunYan
Tutor: ChenShengBoï¼›ZuoWenHan
School: Jilin University
Course: Earth Exploration and Information Technology
Keywords: Limb scattering DOAS By algebraic reconstruction technique Column amount
CLC: P421.33
Type: Master's thesis
Year: 2010
Downloads: 135
Quote: 1
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Abstract


The study was designed based on the atmospheric limb scattered radiation differential optical absorption spectroscopy (DOAS) inversion of atmospheric ozone profiles , and sensitivity analysis related to atmospheric factors on ozone inversion . Based on the analysis of the basic principles of the satellite limb observations mechanism . , And DOAS method will take the algebraic reconstruction technique combined with DOAS inversion of atmospheric ozone profiles . Study Odin-OSIRIS a limb scattering data , for example , the 50km as a reference high- cut , 571 ~ 617nm as a fitting band , DOAS technique eliminates the slowly varying with wavelength part , the role of atmospheric extinction followed by inversion of atmospheric ozone along the absorption path tilting column amount . With SCIATRAN forward model DOAS inversion based on tilt by the ozone column amount retrieved within the range of 10 ~ 48km , the vertical resolution a 1km of atmospheric ozone vertical distribution profiles using multiply algebraic reconstruction technique . O3 , NO2, O4 three gases absorb priori profiles , as 66% of the ozone profiles SCIATRAN model database and calculated by perturbing the weight factor is taken into account in the inversion . Inversion results SCIAMACHY ozone products in Europe and Anhui ray machine by lidar ozone data have a good agreement on the magnitude and trends . By change SCIATRAN model aerosol , cloud and NO2 parameter values ??, analyze them DOAS ozone profile retrieval . The results show that the doAs methods effectively eliminates most of the impact of aerosols and clouds . Selected within the spectral window of NO2 on analog value is small , there is no impact on the inversion results .

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CLC: > Astronomy,Earth Sciences > Atmospheric science (meteorology ) > Meteorological elements,atmospheric phenomenon > Atmospheric nature of the atmospheric structure > Atmospheric structure > The Ozone Layer
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