Hanqin Tian; Naiqing Pan; Rona L. Thompson; Josep G. Canadell; Parvadha Suntharalingam; Pierre Regnier; Eric A. Davidson; Michael J. Prather; Philippe Ciais; Marilena Muntean; Shufen Pan; Wilfried Winiwarter; Sönke Zaehle; Feng Zhou; Robert B. Jackson; Hermann W. Bange; Sarah Berthet; Zihao Bian; Daniele Bianchi; Lex Bouwman; Erik T. Buitenhuis; G. S. Dutton; Minpeng Hu; Akihiko Ito; Atul K. Jain; Aurich Jeltsch‐Thömmes; Fortunat Joos; Sian Kou‐Giesbrecht; Paul B. Krummel; Xin Lan; Angela Landolfi; Ronny Lauerwald; Ya Li; Chaoqun Lü; Taylor Maavara; Manfredi Manizza; Dylan B. Millet; Jens Mühle; Prabir K. Patra; Glen P. Peters; Xiaoyu Qin; Peter A. Raymond; Laure Resplandy; Judith A. Rosentreter; Hao Shi; Qing Sun; Daniele Tonina; Francesco N. Tubiello; Guido R. van der Werf; Nicolas Vuichard; Junjie Wang; Kelley C. Wells; Luke M. Western; Chris Wilson; Jia Yang; Yuanzhi Yao; Yongfa You; Qing Zhu
Abstract. Nitrous oxide (N2O) is a long-lived potent greenhouse gas and stratospheric ozone-depleting substance that has been accumulating in the atmosphere since the preindustrial period. The mole fraction of atmospheric N2O has increased by nearly 25 % from 270 ppb (parts per billion) in 1750 to 336 ppb in 2022, with the fastest annual growth rate since 1980 of more than 1.3 ppb yr−1 in both 2020 and 2021. According to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC AR6), the relative contribution of N2O to the total enhanced effective radiative forcing of greenhouse gases was 6.4 % for 1750–2022. As a core component of our global greenhouse gas assessments coordinated by the Global Carbon Project (GCP), our global N2O budget incorporates both natural a
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