基于Fu-Liou辐射传输模式和卫星观测资料的气溶胶对全球地表太阳辐射影响的研究

发布时间：2019-03-26 12:06

【摘要】：气溶胶可以吸收和散射太阳辐射,影响地表辐射收支平衡,使到达地表的太阳总辐射减少,同时散射辐射在总辐射中所占的比例增加。本文基于MODIS气溶胶产品和CERES云产品等大气遥感资料,利用Fu-Liou辐射传输模式对全球地表辐射进行了有无气溶胶的两组模拟试验。将考虑气溶胶的试验模拟值与BSRN站点观测值进行对比,结果显示地表总辐射模拟的R值达到0.92,地表散射辐射模拟的R值达到0.84,模拟值与观测值有着比较好的一致性。比较两组模拟结果显示,2007年气溶胶导致全球地表总辐射平均减少了9.16W/m2,降低幅度较大的地区往往气溶胶光学厚度(AOD)也较高。对于散射辐射来说,气溶胶在全球不同地区却有着不同的正负效应:地表反照率高的地区,气溶胶往往使得散射辐射大幅增加;而云分数较高的地区,气溶胶往往导致散射辐射大幅度下降。2007年气溶胶导致全球地表散射辐射平均增加了8.17W/m2。
[Abstract]:The aerosol can absorb and scatter solar radiation, affect the surface radiation balance, reduce the total solar radiation reaching the surface, and also increase the proportion of scattered radiation in the total radiation. In this paper, based on the atmospheric remote sensing data of MODIS aerosol products and CERES cloud products, two groups of simulation tests of the presence or absence of aerosol on the global surface radiation are carried out using the Fu-Liou radiation transmission mode. The results show that the R value of the surface total radiation simulation is 0.92, the R value of the surface scattered radiation is 0.84, and the simulation value has good agreement with the observed value. The results of the comparison between the two groups showed that the total surface total radiation of the global surface was reduced by 9.16 W/ m 2 in 2007, and the average aerosol optical thickness (AOD) was higher in the area with larger amplitude. For scattered radiation, aerosols have different positive negative effects in different parts of the world: areas with high surface albedo, aerosols tend to increase the scattered radiation significantly; and in areas with higher cloud scores, The aerosol tends to lead to a significant drop in the scattered radiation. In 2007, the aerosol resulted in an average increase of 8.17 W/ m2 of the global surface scattered radiation.
【作者单位】：北京师范大学全球变化与地球系统科学研究院;全球变化研究协同创新中心;
【基金】：国家自然科学基金项目(41575144)
【分类号】：P422.1;X513

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