Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia

doi:10.5194/acp-2020-649

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-649
	Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia
	Yi Yin, Frederic Chevallier, Philippe Ciais, Philippe Bousquet, Marielle Saunois, Bo Zheng, John Worden, A. Anthony Bloom, Robert Parker, Daniel Jacob, Edward J. Dlugokencky, and Christian Frankenberg
	2020-07-10
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	After stagnating in the early 2000s, the atmospheric methane growth rate has been positive since 2007 with a significant acceleration starting in 2014. While causes for previous growth rate variations are still not well determined, this recent increase can be studied with dense surface and satellite observations. Here, we use an ensemble of six multi-tracer atmospheric inversions that have the capacity to assimilate the major tracers in the methane oxidation chain – namely methane, formaldehyde, and carbon monoxide – to simultaneously optimize both the methane sources and sinks at each model grid. We show that the recent surge of the atmospheric growth rate between 2010–2013 and 2014–2017 is most likely explained by an increase of global CH₄ emissions by 17.5 ± 1.5 Tg yr⁻¹ (mean ± 1σ), while variations in CH₄ sinks remained small. The inferred emission increase is consistently supported by both surface and satellite observations, with leading contributions from the tropics wetlands (~ 35 %) and anthropogenic emissions in China (~ 20 %). Such a high consecutive atmospheric growth rate has not been observed since the 1980s and corresponds to unprecedented global total CH₄ emissions.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/283238
专题	地球科学
推荐引用方式 GB/T 7714	Yi Yin, Frederic Chevallier, Philippe Ciais, Philippe Bousquet, Marielle Saunois, Bo Zheng, John Worden, A. Anthony Bloom, Robert Parker, Daniel Jacob, Edward J. Dlugokencky, and Christian Frankenberg. Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia[J]. Atmospheric Chemistry and Physics,2020.
APA	Yi Yin, Frederic Chevallier, Philippe Ciais, Philippe Bousquet, Marielle Saunois, Bo Zheng, John Worden, A. Anthony Bloom, Robert Parker, Daniel Jacob, Edward J. Dlugokencky, and Christian Frankenberg.(2020).Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia.Atmospheric Chemistry and Physics.
MLA	Yi Yin, Frederic Chevallier, Philippe Ciais, Philippe Bousquet, Marielle Saunois, Bo Zheng, John Worden, A. Anthony Bloom, Robert Parker, Daniel Jacob, Edward J. Dlugokencky, and Christian Frankenberg."Accelerating methane growth rate from 2010 to 2017: leading contributions from the tropics and East Asia".Atmospheric Chemistry and Physics (2020).