Enhanced methane emissions from tropical wetlands during the 2011 la Niña

Sudhanshu Pandey*, Sander Houweling, Maarten Krol, Ilse Aben, Guillaume Monteil, Narcisa Nechita-Banda, Edward J. Dlugokencky, Rob Detmers, Otto Hasekamp, Xiyan Xu, William J. Riley, Benjamin Poulter, Zhen Zhang, Kyle C. McDonald, James W.C. White, Philippe Bousquet, Thomas Röckmann

*Corresponding author for this work

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Abstract

Year-to-year variations in the atmospheric methane (CH4) growth rate show significant correlation with climatic drivers. The second half of 2010 and the first half of 2011 experienced the strongest La Niña since the early 1980s, when global surface networks started monitoring atmospheric CH4 mole fractions. We use these surface measurements, retrievals of column-averaged CH4 mole fractions from GOSAT, new wetland inundation estimates, and atmospheric δ13C-CH4 measurements to estimate the impact of this strong La Niña on the global atmospheric CH4 budget. By performing atmospheric inversions, we find evidence of an increase in tropical CH4 emissions of ∼6-9 TgCH4 yr-1 during this event. Stable isotope data suggest that biogenic sources are the cause of this emission increase. We find a simultaneous expansion of wetland area, driven by the excess precipitation over the Tropical continents during the La Niña. Two process-based wetland models predict increases in wetland area consistent with observationally-constrained values, but substantially smaller per-area CH4 emissions, highlighting the need for improvements in such models. Overall, tropical wetland emissions during the strong La Niña were at least by 5% larger than the long-term mean.
Original languageEnglish
Article number45759
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 2017

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Pandey, S., Houweling, S., Krol, M., Aben, I., Monteil, G., Nechita-Banda, N., ... Röckmann, T. (2017). Enhanced methane emissions from tropical wetlands during the 2011 la Niña. Scientific Reports, 7, [45759]. https://doi.org/10.1038/srep45759
Pandey, Sudhanshu ; Houweling, Sander ; Krol, Maarten ; Aben, Ilse ; Monteil, Guillaume ; Nechita-Banda, Narcisa ; Dlugokencky, Edward J. ; Detmers, Rob ; Hasekamp, Otto ; Xu, Xiyan ; Riley, William J. ; Poulter, Benjamin ; Zhang, Zhen ; McDonald, Kyle C. ; White, James W.C. ; Bousquet, Philippe ; Röckmann, Thomas. / Enhanced methane emissions from tropical wetlands during the 2011 la Niña. In: Scientific Reports. 2017 ; Vol. 7.
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title = "Enhanced methane emissions from tropical wetlands during the 2011 la Ni{\~n}a",
abstract = "Year-to-year variations in the atmospheric methane (CH4) growth rate show significant correlation with climatic drivers. The second half of 2010 and the first half of 2011 experienced the strongest La Ni{\~n}a since the early 1980s, when global surface networks started monitoring atmospheric CH4 mole fractions. We use these surface measurements, retrievals of column-averaged CH4 mole fractions from GOSAT, new wetland inundation estimates, and atmospheric δ13C-CH4 measurements to estimate the impact of this strong La Ni{\~n}a on the global atmospheric CH4 budget. By performing atmospheric inversions, we find evidence of an increase in tropical CH4 emissions of ∼6-9 TgCH4 yr-1 during this event. Stable isotope data suggest that biogenic sources are the cause of this emission increase. We find a simultaneous expansion of wetland area, driven by the excess precipitation over the Tropical continents during the La Ni{\~n}a. Two process-based wetland models predict increases in wetland area consistent with observationally-constrained values, but substantially smaller per-area CH4 emissions, highlighting the need for improvements in such models. Overall, tropical wetland emissions during the strong La Ni{\~n}a were at least by 5{\%} larger than the long-term mean.",
author = "Sudhanshu Pandey and Sander Houweling and Maarten Krol and Ilse Aben and Guillaume Monteil and Narcisa Nechita-Banda and Dlugokencky, {Edward J.} and Rob Detmers and Otto Hasekamp and Xiyan Xu and Riley, {William J.} and Benjamin Poulter and Zhen Zhang and McDonald, {Kyle C.} and White, {James W.C.} and Philippe Bousquet and Thomas R{\"o}ckmann",
year = "2017",
doi = "10.1038/srep45759",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

Pandey, S, Houweling, S, Krol, M, Aben, I, Monteil, G, Nechita-Banda, N, Dlugokencky, EJ, Detmers, R, Hasekamp, O, Xu, X, Riley, WJ, Poulter, B, Zhang, Z, McDonald, KC, White, JWC, Bousquet, P & Röckmann, T 2017, 'Enhanced methane emissions from tropical wetlands during the 2011 la Niña', Scientific Reports, vol. 7, 45759. https://doi.org/10.1038/srep45759

Enhanced methane emissions from tropical wetlands during the 2011 la Niña. / Pandey, Sudhanshu; Houweling, Sander; Krol, Maarten; Aben, Ilse; Monteil, Guillaume; Nechita-Banda, Narcisa; Dlugokencky, Edward J.; Detmers, Rob; Hasekamp, Otto; Xu, Xiyan; Riley, William J.; Poulter, Benjamin; Zhang, Zhen; McDonald, Kyle C.; White, James W.C.; Bousquet, Philippe; Röckmann, Thomas.

In: Scientific Reports, Vol. 7, 45759, 2017.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Enhanced methane emissions from tropical wetlands during the 2011 la Niña

AU - Pandey, Sudhanshu

AU - Houweling, Sander

AU - Krol, Maarten

AU - Aben, Ilse

AU - Monteil, Guillaume

AU - Nechita-Banda, Narcisa

AU - Dlugokencky, Edward J.

AU - Detmers, Rob

AU - Hasekamp, Otto

AU - Xu, Xiyan

AU - Riley, William J.

AU - Poulter, Benjamin

AU - Zhang, Zhen

AU - McDonald, Kyle C.

AU - White, James W.C.

AU - Bousquet, Philippe

AU - Röckmann, Thomas

PY - 2017

Y1 - 2017

N2 - Year-to-year variations in the atmospheric methane (CH4) growth rate show significant correlation with climatic drivers. The second half of 2010 and the first half of 2011 experienced the strongest La Niña since the early 1980s, when global surface networks started monitoring atmospheric CH4 mole fractions. We use these surface measurements, retrievals of column-averaged CH4 mole fractions from GOSAT, new wetland inundation estimates, and atmospheric δ13C-CH4 measurements to estimate the impact of this strong La Niña on the global atmospheric CH4 budget. By performing atmospheric inversions, we find evidence of an increase in tropical CH4 emissions of ∼6-9 TgCH4 yr-1 during this event. Stable isotope data suggest that biogenic sources are the cause of this emission increase. We find a simultaneous expansion of wetland area, driven by the excess precipitation over the Tropical continents during the La Niña. Two process-based wetland models predict increases in wetland area consistent with observationally-constrained values, but substantially smaller per-area CH4 emissions, highlighting the need for improvements in such models. Overall, tropical wetland emissions during the strong La Niña were at least by 5% larger than the long-term mean.

AB - Year-to-year variations in the atmospheric methane (CH4) growth rate show significant correlation with climatic drivers. The second half of 2010 and the first half of 2011 experienced the strongest La Niña since the early 1980s, when global surface networks started monitoring atmospheric CH4 mole fractions. We use these surface measurements, retrievals of column-averaged CH4 mole fractions from GOSAT, new wetland inundation estimates, and atmospheric δ13C-CH4 measurements to estimate the impact of this strong La Niña on the global atmospheric CH4 budget. By performing atmospheric inversions, we find evidence of an increase in tropical CH4 emissions of ∼6-9 TgCH4 yr-1 during this event. Stable isotope data suggest that biogenic sources are the cause of this emission increase. We find a simultaneous expansion of wetland area, driven by the excess precipitation over the Tropical continents during the La Niña. Two process-based wetland models predict increases in wetland area consistent with observationally-constrained values, but substantially smaller per-area CH4 emissions, highlighting the need for improvements in such models. Overall, tropical wetland emissions during the strong La Niña were at least by 5% larger than the long-term mean.

U2 - 10.1038/srep45759

DO - 10.1038/srep45759

M3 - Article

VL - 7

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 45759

ER -