Study on Accuracy Evaluation of MCD19A2 and Spatiotemporal Distribution of AOD in Arid Zones of Central Asia

The Central Asian arid zone is the largest non-territorial in world, so it particularly important to understand optical properties of aerosols this region. In paper, we validate MCD19A2 atmospheric aerosol depth (AOD) remote sensing data by using ground-based and measured data. To explore spatial temporal changes as well interannual variations seasonal variations, characterize distributions AOD over 20 years. Finally, analyze three methods, namely, Theil–Sen median trend analysis combined with Mann–Kendall test, coefficient variation, Hurst index; characteristics zone; relationships among AOD, wind speed, NDVI. This study reveals long-term provides a scientific basis for estimating factors affecting climate change.