Global PM2.5 Dataset: Hybrid Calibration of CAMS and MERRA-2 PM2.5 Reanalysis Products during 2017-2019

By integrating two reanalysis PM2.5 products (CAMSRA, MERRA-2), a global daily hybrid-calibrated PM2.5 concentration dataset is generated through the proposed CM-HC scheme with ERT model. This products include 1095 global PM2.5 GeoTIFF files, starting from Jan 01, 2017 to Dec 31, 2019 (about 0.95GB memory after uncompressing this zip file).

To prove the superiority of this product, some experiments are implemented as follows: comparing with 1) two original products; 2) results of two separate calibration schemes with ERT; 3) results of CM-HC with other three ML models (RF, GBDT, XGBoost). Above analyses include two aspects, that is, the accuracy results and mapping effects. More details can be viewed at the thesis.

One GeoTIFF file includes one-day calibrated PM2.5 data. It is worth noting that the files contain the data of ocean area, however, our thesis only shows the results of land area in order to visually display the mapping effect before and after calibrating. Also, there is no site on the sea to validate in our study.