大气臭氧总量与吸收性气溶胶指数的关系

发布时间：2018-08-24 12:14

【摘要】：吸收性气溶胶指数AAI(Absorbing Aerosol Index)是基于卫星观测的紫外后向散射辐射导出的参数,与大气中对紫外线有吸收作用的气溶胶(简称吸收性气溶胶)有关,能够定性反应吸收性气溶胶的存在与空间分布特征。由于臭氧在AAI反演波段对紫外线仍然存在弱吸收作用,因此AAI可能与大气臭氧总量有关,臭氧反演的误差也可能对AAI的反演精度造成影响。为了研究臭氧总量与AAI的关系,臭氧反演的精度对AAI反演的影响,利用辐射传输模型通过敏感性实验,来模拟吸收性气溶胶指数和臭氧总量之间的关系,臭氧反演误差对吸收气溶胶指数的反演的影响。采用沙漠气溶胶,不改变气溶胶的含量,通过改变中纬度夏季的臭氧总量来计算大气模型。对臭氧总量、气溶胶含量与AAI的内在关系,臭氧总量对AAI反演精度的影响进行了模拟,模拟结果表明,气溶胶指数与臭氧总量的改变存在正相关关系,而臭氧总量的反演误差对AAI指数的反演影响不大。基于风云三号气象卫星紫外臭氧总量探测仪(FY-3/TOU)的臭氧总量和吸收性气溶胶指数数据(2012年),分析了青藏高原地区7月份臭氧总量与吸收性气溶胶指数空间分布特征的关系,与模拟结果一致。
[Abstract]:The absorptive aerosol index (AAI (Absorbing Aerosol Index) is a parameter derived from the ultraviolet backscattering radiation from satellite observations and is related to the atmospheric aerosol which absorbs ultraviolet light (abbreviated as the absorptive aerosol). The existence and spatial distribution of absorbable aerosols can be qualitatively reactive. Because ozone still has weak absorption of ultraviolet in AAI inversion band, AAI may be related to the total amount of atmospheric ozone, and the error of ozone inversion may also affect the accuracy of AAI inversion. In order to study the relationship between total ozone and AAI, and the effect of ozone inversion accuracy on AAI inversion, a radiative transfer model was used to simulate the relationship between absorptive aerosol index and total ozone by means of sensitivity experiments. The effect of ozone inversion error on the inversion of absorption aerosol index. Using desert aerosol, the atmospheric model is calculated by changing the total amount of ozone in mid-latitude summer without changing the content of aerosol. The relationship between total ozone, aerosol content and AAI, and the effect of total ozone on the inversion accuracy of AAI are simulated. The simulation results show that there is a positive correlation between the change of aerosol index and total ozone. However, the inversion error of total ozone has little effect on the inversion of AAI exponent. Based on the total ozone amount and the absorptive aerosol index data of the Fengyun 3 Meteorological Satellite Ultraviolet Ozone detector (FY-3/TOU) (2012), the relationship between the total ozone amount and the spatial distribution characteristics of the absorptive aerosol index in the Qinghai-Tibet Plateau in July was analyzed. The results are in good agreement with the simulation results.
【作者单位】：成都信息工程大学电子工程学院;国家卫星气象中心中国气象局中国遥感卫星辐射测量和定标重点开放实验室;航天天绘科技有限公司四川分公司集成电路设计中心;宜宾职业技术学院电子信息与控制工程系;
【基金】：国家自然科学基金(编号:41375042,41175024) 北京市科技计划(编号:Z151100003615001)~~
【分类号】：X51

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