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Four decades of full-scale nitrous oxide emission inventory in China.
- Source :
- National Science Review; Mar2024, Vol. 11 Issue 3, p1-13, 13p
- Publication Year :
- 2024
-
Abstract
- China is among the top nitrous oxide (N<subscript>2</subscript>O)-emitting countries, but existing national inventories do not provide full-scale emissions including both natural and anthropogenic sources. We conducted a four-decade (1980 – 2020) of comprehensive quantification of Chinese N<subscript>2</subscript>O inventory using empirical emission factor method for anthropogenic sources and two up-to-date process-based models for natural sources. Total N<subscript>2</subscript>O emissions peaked at 2287.4 (1774.8 – 2799.9) Gg N<subscript>2</subscript>O yr<superscript>−1</superscript> in 2018, and agriculture-developed regions, like the East, Northeast, and Central, were the top N<subscript>2</subscript>O-emitting regions. Agricultural N<subscript>2</subscript>O emissions have started to decrease after 2016 due to the decline of nitrogen fertilization applications, while, industrial and energetic sources have been dramatically increasing after 2005. N<subscript>2</subscript>O emissions from agriculture, industry, energy, and waste represented 49.3%, 26.4%, 17.5%, and 6.7% of the anthropogenic emissions in 2020, respectively, which revealed that it is imperative to prioritize N<subscript>2</subscript>O emission mitigation in agriculture, industry, and energy. Natural N<subscript>2</subscript>O sources, dominated by forests, have been steadily growing from 317.3 (290.3 – 344.1) Gg N<subscript>2</subscript>O yr<superscript>−1</superscript> in 1980 to 376.2 (335.5 – 407.2) Gg N<subscript>2</subscript>O yr<superscript>−1</superscript> in 2020. Our study produces a Full-scale Annual N<subscript>2</subscript>O dataset in China (FAN2020), providing emergent counting to refine the current national N<subscript>2</subscript>O inventories. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20955138
- Volume :
- 11
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- National Science Review
- Publication Type :
- Academic Journal
- Accession number :
- 176725145
- Full Text :
- https://doi.org/10.1093/nsr/nwad285