2000—2014年四川省气溶胶时空格局及其驱动因子定量研究

发布时间：2019-01-03 21:42

【摘要】：论文研究四川省2000—2014年气溶胶光学厚度的时空演变趋势,并综合自然和人为两方面因素,从区域尺度上对四川省气溶胶光学厚度演变的驱动力进行定量研究,更进一步从像元尺度上分析驱动力的空间分异。结果表明:1)四川省以中部盆地为气溶胶光学厚度高值中心区且增长趋势最为明显,川东平行岭谷值较小且有轻度减少趋势,川西高原、川西南山地值最小,但有轻度增长趋势;2)区域尺度上,对气溶胶光学厚度驱动力主导因子进行定量研究,建立了气溶胶光学厚度(AOD)与GNP、降水量和归一化植被指数的多元回归模型,即AOD=0.849+0.567×GNP-0.909×降水量-0.077×归一化植被指数,该模型较好地体现了在更为宏观的区域层面上四川省气溶胶光学厚度演变驱动力的定量作用;3)像元尺度上,驱动力的空间分异表现为中部盆地气溶胶光学厚度主要受人为和地表因素影响,川东平行岭谷、川西高原和川西南山地气溶胶光学厚度受气象和地表因素影响较多。由于川渝地区秋冬季多云雾,有效的气溶胶卫星观测数据偏少,因此如何在秋冬季获取气溶胶光学厚度有效数据是未来应加强的工作;在驱动力因子方面人为因子的选取划分可以进一步具体化;由点到面的插值会影响驱动力因子数据的精度,故如何通过高精度的插值方法来提高数据的精度亦是未来提高驱动力定量研究准确性的发展方向。
[Abstract]:This paper studies the temporal and spatial evolution trend of aerosol optical thickness in Sichuan Province from 2000 to 2014, and quantitatively studies the driving force of aerosol optical thickness evolution in Sichuan Province on a regional scale by combining natural and human factors. Furthermore, the spatial differentiation of driving forces is analyzed from the pixel scale. The results are as follows: 1) in Sichuan Province, the central area of aerosol optical thickness is the central area of aerosol optical thickness, and the increasing trend is the most obvious, the value of parallel ridge and valley in eastern Sichuan is smaller and has a slight decreasing trend, and the value of western Sichuan plateau and southwest Sichuan mountain is the smallest. However, there is a slight increase trend. 2) on the regional scale, the driving force factors of aerosol optical thickness were quantitatively studied, and a multivariate regression model of aerosol optical thickness (AOD), GNP, precipitation and normalized vegetation index was established. That is, AOD=0.849 0.567 脳 GNP-0.909 脳 precipitation-0.077 脳 normalized vegetation index. The model well reflects the quantitative effect of the driving force of aerosol optical thickness evolution in Sichuan Province on a more macroscopic regional level. 3) on pixel scale, the spatial differentiation of driving force is that the aerosol optical thickness in the central basin is mainly affected by human and surface factors, and the east Sichuan parallel ridge valley. The aerosol optical thickness in the western Sichuan Plateau and the South Sichuan Mountains is influenced by meteorological and surface factors. Due to the cloud and fog in autumn and winter in Sichuan and Chongqing, the effective aerosol satellite observation data are few, so how to obtain the effective data of aerosol optical thickness in autumn and winter should be strengthened in the future. In the aspect of driving force factors, the selection and division of human factors can be further concretized. Point-to-surface interpolation will affect the accuracy of driving force factor data, so how to improve the accuracy of data through high-precision interpolation method is also the development direction of improving the accuracy of driving force quantitative research in the future.
【作者单位】：成都信息工程大学;
【基金】：国家自然科学基金(524006) 四川省科技计划应用基础研究(2014JY0084) 四川省教育厅项目(13ZA0092)~~
【分类号】：X513

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