Isotopic ratios of tropical methane emissions by atmospheric measurement

R. Brownlow; D. Lowry; R. E. Fisher; J. L. France; M. Lanoisellé; B. White; M. J. Wooster; T. Zhang; E. G. Nisbet

doi:10.1002/2017GB005689

Isotopic ratios of tropical methane emissions by atmospheric measurement

R. Brownlow, D. Lowry, R. E. Fisher, J. L. France, M. Lanoisellé, B. White, M. J. Wooster, T. Zhang, E. G. Nisbet

School of Environmental Sciences

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Abstract

Tropical methane sources are an important part of the global methane budget and include natural wetlands, rice agriculture, biomass burning, ruminants, fossil fuels, and waste. δ¹³C_CH4 can provide strong constraints on methane source apportionment. For example, tropical wetlands in this study give δ¹³C_CH4 values between −61.5 ± 2.9‰ and −53.0 ± 0.4‰ and in general are more enriched in ¹³C than temperate and boreal wetlands. However, thus far, relatively few measurements of δ¹³C_CH4 in methane-enriched air have been made in the tropics. In this study samples have been collected from tropical wetland, rice, ruminant, and biomass burning emissions to the atmosphere. Regional isotopic signatures vary greatly as different processes and source material affect methane signatures. Measurements were made to determine bulk source inputs to the atmosphere, rather than to study individual processes. These measurements provide inputs for regional methane budget models, to constrain emissions with better source apportionment.

Original language	English
Pages (from-to)	1408–1419
Number of pages	12
Journal	Global Biogeochemical Cycles
Volume	31
Issue number	9
Early online date	25 Sept 2017
DOIs	https://doi.org/10.1002/2017GB005689
Publication status	Published - Sept 2017

Keywords

methane
isotopes
δ13C
tropics

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10.1002/2017GB005689Licence: CC BY

Published manuscript
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 332 KBLicence: CC BY

http://doi.wiley.com/10.1002/2017GB005689Licence: CC BY

International Collaboration on Measurement of Globally-Important Gases in the Atmosphere of the Tropical Maritime Continent (Joint Proposal - Lead, University of Cambridge)
Sturges, B., Manning, A., Oram, D., Bandy, B. & Humphrey, S.
Natural Environment Research Council
4/10/12 → 3/10/15
Project: Research

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title = "Isotopic ratios of tropical methane emissions by atmospheric measurement",

abstract = "Tropical methane sources are an important part of the global methane budget and include natural wetlands, rice agriculture, biomass burning, ruminants, fossil fuels, and waste. δ13CCH4 can provide strong constraints on methane source apportionment. For example, tropical wetlands in this study give δ13CCH4 values between −61.5 ± 2.9‰ and −53.0 ± 0.4‰ and in general are more enriched in 13C than temperate and boreal wetlands. However, thus far, relatively few measurements of δ13CCH4 in methane-enriched air have been made in the tropics. In this study samples have been collected from tropical wetland, rice, ruminant, and biomass burning emissions to the atmosphere. Regional isotopic signatures vary greatly as different processes and source material affect methane signatures. Measurements were made to determine bulk source inputs to the atmosphere, rather than to study individual processes. These measurements provide inputs for regional methane budget models, to constrain emissions with better source apportionment.",

keywords = "methane, isotopes, δ13C, tropics",

author = "R. Brownlow and D. Lowry and Fisher, {R. E.} and France, {J. L.} and M. Lanoisell{\'e} and B. White and Wooster, {M. J.} and T. Zhang and Nisbet, {E. G.}",

year = "2017",

month = sep,

doi = "10.1002/2017GB005689",

language = "English",

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journal = "Global Biogeochemical Cycles",

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TY - JOUR

T1 - Isotopic ratios of tropical methane emissions by atmospheric measurement

AU - Brownlow, R.

AU - Lowry, D.

AU - Fisher, R. E.

AU - France, J. L.

AU - Lanoisellé, M.

AU - White, B.

AU - Wooster, M. J.

AU - Zhang, T.

AU - Nisbet, E. G.

PY - 2017/9

Y1 - 2017/9

N2 - Tropical methane sources are an important part of the global methane budget and include natural wetlands, rice agriculture, biomass burning, ruminants, fossil fuels, and waste. δ13CCH4 can provide strong constraints on methane source apportionment. For example, tropical wetlands in this study give δ13CCH4 values between −61.5 ± 2.9‰ and −53.0 ± 0.4‰ and in general are more enriched in 13C than temperate and boreal wetlands. However, thus far, relatively few measurements of δ13CCH4 in methane-enriched air have been made in the tropics. In this study samples have been collected from tropical wetland, rice, ruminant, and biomass burning emissions to the atmosphere. Regional isotopic signatures vary greatly as different processes and source material affect methane signatures. Measurements were made to determine bulk source inputs to the atmosphere, rather than to study individual processes. These measurements provide inputs for regional methane budget models, to constrain emissions with better source apportionment.

AB - Tropical methane sources are an important part of the global methane budget and include natural wetlands, rice agriculture, biomass burning, ruminants, fossil fuels, and waste. δ13CCH4 can provide strong constraints on methane source apportionment. For example, tropical wetlands in this study give δ13CCH4 values between −61.5 ± 2.9‰ and −53.0 ± 0.4‰ and in general are more enriched in 13C than temperate and boreal wetlands. However, thus far, relatively few measurements of δ13CCH4 in methane-enriched air have been made in the tropics. In this study samples have been collected from tropical wetland, rice, ruminant, and biomass burning emissions to the atmosphere. Regional isotopic signatures vary greatly as different processes and source material affect methane signatures. Measurements were made to determine bulk source inputs to the atmosphere, rather than to study individual processes. These measurements provide inputs for regional methane budget models, to constrain emissions with better source apportionment.

KW - methane

KW - isotopes

KW - δ13C

KW - tropics

U2 - 10.1002/2017GB005689

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SN - 0886-6236

VL - 31

SP - 1408

EP - 1419

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

IS - 9

ER -

Isotopic ratios of tropical methane emissions by atmospheric measurement

Abstract

Keywords

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Projects

International Collaboration on Measurement of Globally-Important Gases in the Atmosphere of the Tropical Maritime Continent (Joint Proposal - Lead, University of Cambridge)

Cite this