How effective is satellite data in capturing human health-relevant air pollution at the surface?
One key difference between satellite air pollution data and ground monitors is that while monitors directly measure air pollutant concentrations at the surface, satellite instruments take measurements of the entire atmospheric column. Thus, satellite data is not a direct measure of air pollution at the surface, the metric most relevant for human health impacts. Furthermore, conditions such as cloud cover and reflective land surfaces prevents satellite instruments from capturing pollutant concentrations. In light of these limitations, many studies in the literature have analyzed the relationship between satellite-derived and surface...