Commercial airliners monitoring CO2 emissions from cities worldwide

Monitoring greenhouse gas emissions from cities is important in order to support climate mitigation activities in response to the Paris Agreement. An international research team examined carbon dioxide (CO2) data collected over 34 global cities by Japan’s commercial airliners. Their study revealed a relationship between urban atmospheric CO2 signals and emissions from cities for the first time. The relationship suggests that global observations by commercial airlines could provide an opportunity for urban CO2 emissions monitoring.