Figure 1.
Average AOD at 550 nm from the Moderate Resolution Imaging Spectroradiometer during January-to-March 2016 over the S. Asian region. The receptor sites are shown: the Bangladesh Climate Observatory at Bhola (BCOB, red fill) and the Maldives Climate Observatory at Hanimaadhoo (MCOH, blue fill). The dashed lines show mean air mass back-trajectory clusters, and the arrows represent the air mass transport pathways for the two sites, respectively (see details in Supporting Information Figures S2 and S3).