Influence of Atmospheric Transport on Estimates of Variability in the Global Methane Burden

Sudhanshu Pandey, Sander Houweling, Maarten Krol, Ilse Aben, Narcisa Nechita-Banda, Kirk Thoning, Thomas Röckmann, Yi Yin, Arjo Segers, Edward J. Dlugokencky

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We quantify the impact of atmospheric transport and limited marine boundary layer sampling on changes in global and regional methane burdens estimate using tracer transport model simulations with annually repeating methane emissions and sinks but varying atmospheric transport patterns. We find the 1σ error due to this transport and sampling effect on annual global methane increases to be 1.11 ppb/year and on zonal growth rates to be 3.8 ppb/year, indicating that it becomes more critical at smaller spatiotemporal scales. We also find that the trends in inter-hemispheric and inter-polar difference of methane are significantly influenced by the effect. Contrary to a negligible trend in the inter-hemispheric difference of measurements, we find, after adjusting for the transport and sampling, a trend of 0.37 ± 0.06 ppb/year. This is consistent with the emission trend from a 3-D inversion of the measurements, suggesting a faster increase in emissions in the Northern Hemisphere than in the Southern Hemisphere.

Original languageEnglish
Pages (from-to)2302-2311
Number of pages10
JournalGeophysical Research Letters
Volume46
Issue number4
Early online date29 Jan 2019
DOIs
Publication statusPublished - 28 Feb 2019

Fingerprint

atmospheric transport
methane
trends
sampling
estimates
Southern Hemisphere
Northern Hemisphere
sinks
tracers
boundary layers
boundary layer
adjusting
tracer
inversions
trend
simulation
effect

Keywords

  • atmospheric burden
  • atmospheric transport
  • CH emissions
  • interhemispheric difference
  • methane
  • TM5

Cite this

Pandey, Sudhanshu ; Houweling, Sander ; Krol, Maarten ; Aben, Ilse ; Nechita-Banda, Narcisa ; Thoning, Kirk ; Röckmann, Thomas ; Yin, Yi ; Segers, Arjo ; Dlugokencky, Edward J. / Influence of Atmospheric Transport on Estimates of Variability in the Global Methane Burden. In: Geophysical Research Letters. 2019 ; Vol. 46, No. 4. pp. 2302-2311.
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abstract = "We quantify the impact of atmospheric transport and limited marine boundary layer sampling on changes in global and regional methane burdens estimate using tracer transport model simulations with annually repeating methane emissions and sinks but varying atmospheric transport patterns. We find the 1σ error due to this transport and sampling effect on annual global methane increases to be 1.11 ppb/year and on zonal growth rates to be 3.8 ppb/year, indicating that it becomes more critical at smaller spatiotemporal scales. We also find that the trends in inter-hemispheric and inter-polar difference of methane are significantly influenced by the effect. Contrary to a negligible trend in the inter-hemispheric difference of measurements, we find, after adjusting for the transport and sampling, a trend of 0.37 ± 0.06 ppb/year. This is consistent with the emission trend from a 3-D inversion of the measurements, suggesting a faster increase in emissions in the Northern Hemisphere than in the Southern Hemisphere.",
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Pandey, S, Houweling, S, Krol, M, Aben, I, Nechita-Banda, N, Thoning, K, Röckmann, T, Yin, Y, Segers, A & Dlugokencky, EJ 2019, 'Influence of Atmospheric Transport on Estimates of Variability in the Global Methane Burden' Geophysical Research Letters, vol. 46, no. 4, pp. 2302-2311. https://doi.org/10.1029/2018GL081092

Influence of Atmospheric Transport on Estimates of Variability in the Global Methane Burden. / Pandey, Sudhanshu; Houweling, Sander; Krol, Maarten; Aben, Ilse; Nechita-Banda, Narcisa; Thoning, Kirk; Röckmann, Thomas; Yin, Yi; Segers, Arjo; Dlugokencky, Edward J.

In: Geophysical Research Letters, Vol. 46, No. 4, 28.02.2019, p. 2302-2311.

Research output: Contribution to JournalArticleAcademicpeer-review

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AU - Röckmann, Thomas

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