As atmospheric methane concentrations increase at record pace, it is critical to identify
individual emission sources with high potential for mitigation. Here, we leverage the synergy
between satellite instruments with different spatiotemporal coverage and resolution to detect
and quantify emissions from individual landfills. We use the global surveying Tropospheric
Monitoring Instrument (TROPOMI) to identify large emission hot spots and then zoom in with
high-resolution target-mode observations from the GHGSat instrument suite to identify the …