The spatio-temporal characteristics of aerosol optical thickness as well as the relationship with PM in Xiamen city, China.

Long-term aerosol optical thickness (AOT) composited data (2002-2017) derived from Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra and Aqua spacecraft was used to evaluate the temporal and spatial variability of aerosol in Xiamen city by using wavelet analysis, and the relationship between the surface mass concentrations of particulate matter with aerodynamic diameters less than 2.5 μm (PM) and the AOT was analyzed by using linear regression. The results showed that AOT increased gradually from 2002 to 2011, and then decreased.

[Variation of total ozone over Tibetain Plateau during 30 years monitored by remotely sensed data].

This paper is study on the temporal and spatial dynamics characteristics of total ozone over Tibetain Plateau from 1979 using multi-resource remote sensing. The findings indicate that the total ozone over Tibetain Plateau is continuously decreasing. The decreasing rate is larger than the global and northern hemisphere average, and the average annual decreasing rates are about 0.