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National N2O emissions (1980-2020) derived from multiple sources of data: magnitudes, trends and drivers

Presentation Date
Monday, December 11, 2023 at 8:45am - Monday, December 11, 2023 at 8:55am
Location
MC - 3010 - West
Authors

Author

Abstract

Nitrous oxide (N2O) is the most important stratospheric ozone-depleting agent and a long-lived potent greenhouse gas with an atmospheric lifetime of more than 100 years. N2O has been accumulating in the atmosphere since the pre-industrial period, mainly because of anthropogenic agricultural and industrial activities. There is substantial interest in estimating the contributions of individual countries to global N2O emissions, since most nationally determined contributions (NDCs) of the United Nations Framework Convention on Climate Change set targets for N2O. Here we present a national N2O inventory that incorporates multiple anthropogenic and natural sources and accounts for the interaction between nitrogen additions and the biochemical processes that control N2O emissions. We use bottom-up (process-based terrestrial biosphere model, inventory, statistical model) and top-down (atmospheric inversion) approaches to provide a comprehensive quantification of national N2O emissions resulting from different natural and anthropogenic sources between 1980 and 2020. The results show that N2O emissions in most countries significantly increased since 1980 due to the rising anthropogenic emissions, and China, Brazil, India, and the United States emitted the largest amount of N2O in the recent decade. Our results can provide guidance for making country-level N2O mitigation strategies.

Category
Biogeosciences
Funding Program Area(s)