AI Summary & Key Takeaways
AI InsightTherefore, the two regions were sensitive to the implementation of governmental industrial development policies and national environmental protection measures, thus they were recognized as the critical areas for the reduction of nitrogen oxide emissions in the Sichuan Basin.
📌 3 Key Takeaways
Özet
To get deep insight into the temporal and spatial characteristics of the tropospheric NO 2 columns in the Sichuan Basin from 2005 to 2016, inversion data of OMI satellite remote sensing was analyzed in this study. It revealed that the density of NO 2 column in the Sichuan Basin increased before 2013 while decreased after 2013. Compared with the nitrogen oxide emission inventory data, the tropospheric NO 2 column density were con- sistent well with the trend of inter annual variations and spatial distributions of nitrogen emission intensities. The spatial distributions of the NO 2 column densities were also affected by terrain, meteorological factors and its lifetime. The high-value areas coincided with the shallower planetary boundary layer heights (PBLH) in the Basin, distributed along with the mountain range directions in the edge of the Sichuan Basin. Chengdu and the urban of Chongqing were not only the centers of the high value of NO 2 columns, but also the areas with the sharpest change rate in both the period of increasing and decreasing. Therefore, the two regions were sensitive to the implementation of governmental industrial development policies and national environmental protection measures, thus they were recognized as the critical areas for the reduction of nitrogen oxide emissions in the Sichuan Basin.