%0 Journal Article %K MERRA-2 %K Air-pollution %K Fine-mode %B Advances in Space Research %D 2021 %R https://doi.org/10.1016/j.asr.2021.02.008 %T PM2.5/PM10 ratio characteristics over urban sites of India %U https://www.sciencedirect.com/science/article/pii/S0273117721001216