Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017
The concentration of atmospheric methane (CH<sub>4</sub>) has more than doubled over the industrial era. To help constrain global and regional CH<sub>4</sub> budgets, inverse (top-down) models incorporate data on the concentration and stable carbon (<i>δ</i><...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-08-01
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| Series: | Earth System Science Data |
| Online Access: | https://www.earth-syst-sci-data.net/9/639/2017/essd-9-639-2017.pdf |
| _version_ | 1819268432315547648 |
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| author | O. A. Sherwood O. A. Sherwood S. Schwietzke S. Schwietzke V. A. Arling G. Etiope G. Etiope |
| author_facet | O. A. Sherwood O. A. Sherwood S. Schwietzke S. Schwietzke V. A. Arling G. Etiope G. Etiope |
| author_sort | O. A. Sherwood |
| collection | DOAJ |
| description | The concentration of atmospheric methane (CH<sub>4</sub>) has more than
doubled over the industrial era. To help constrain global and regional
CH<sub>4</sub> budgets, inverse (top-down) models incorporate data on the
concentration and stable carbon (<i>δ</i><sup>13</sup>C) and hydrogen (<i>δ</i><sup>2</sup>H) isotopic ratios of atmospheric CH<sub>4</sub>. These models depend on
accurate <i>δ</i><sup>13</sup>C and <i>δ</i><sup>2</sup>H end-member source signatures for
each of the main emissions categories. Compared with meticulous measurement and
calibration of isotopic CH<sub>4</sub> in the atmosphere, there has been relatively
less effort to characterize globally representative isotopic source
signatures, particularly for fossil fuel sources. Most global CH<sub>4</sub> budget
models have so far relied on outdated source signature values derived from
globally nonrepresentative data. To correct this deficiency, we present a
comprehensive, globally representative end-member database of the
<i>δ</i><sup>13</sup>C and <i>δ</i><sup>2</sup>H of CH<sub>4</sub> from fossil fuel (conventional
natural gas, shale gas, and coal), modern microbial (wetlands, rice paddies,
ruminants, termites, and landfills and/or waste) and biomass burning sources. Gas
molecular compositional data for fossil fuel categories are also included
with the database. The database comprises 10 706 samples (8734 fossil fuel,
1972 non-fossil) from 190 published references. Mean (unweighted)
<i>δ</i><sup>13</sup>C signatures for fossil fuel CH<sub>4</sub> are significantly lighter
than values commonly used in CH<sub>4</sub> budget models, thus highlighting
potential underestimation of fossil fuel CH<sub>4</sub> emissions in previous
CH<sub>4</sub> budget models. This living database will be updated every 2–3 years
to provide the atmospheric modeling community with the most complete CH<sub>4</sub>
source signature data possible. Database digital object identifier (DOI):
<a href="https://doi.org/10.15138/G3201T" target="_blank">https://doi.org/10.15138/G3201T</a>. |
| first_indexed | 2024-12-23T21:32:58Z |
| format | Article |
| id | doaj.art-b84d16d8dc774c1cac6d124bc150fe24 |
| institution | Directory Open Access Journal |
| issn | 1866-3508 1866-3516 |
| language | English |
| last_indexed | 2024-12-23T21:32:58Z |
| publishDate | 2017-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth System Science Data |
| spelling | doaj.art-b84d16d8dc774c1cac6d124bc150fe242022-12-21T17:30:24ZengCopernicus PublicationsEarth System Science Data1866-35081866-35162017-08-01963965610.5194/essd-9-639-2017Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017O. A. Sherwood0O. A. Sherwood1S. Schwietzke2S. Schwietzke3V. A. Arling4G. Etiope5G. Etiope6Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80303, USADepartment of Earth Sciences, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, CanadaCooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, 80303, USANOAA Earth System Research Laboratory, Global Monitoring Division, Boulder, Colorado, 80305, USANOAA Earth System Research Laboratory, Global Monitoring Division, Boulder, Colorado, 80305, USAIstituto Nazionale di Geofisica e Vulcanologia, Rome, 00143, ItalyFaculty of Environmental Science and Engineering, Babes-Bolyai University, Cluj-Napoca, 400294, RomaniaThe concentration of atmospheric methane (CH<sub>4</sub>) has more than doubled over the industrial era. To help constrain global and regional CH<sub>4</sub> budgets, inverse (top-down) models incorporate data on the concentration and stable carbon (<i>δ</i><sup>13</sup>C) and hydrogen (<i>δ</i><sup>2</sup>H) isotopic ratios of atmospheric CH<sub>4</sub>. These models depend on accurate <i>δ</i><sup>13</sup>C and <i>δ</i><sup>2</sup>H end-member source signatures for each of the main emissions categories. Compared with meticulous measurement and calibration of isotopic CH<sub>4</sub> in the atmosphere, there has been relatively less effort to characterize globally representative isotopic source signatures, particularly for fossil fuel sources. Most global CH<sub>4</sub> budget models have so far relied on outdated source signature values derived from globally nonrepresentative data. To correct this deficiency, we present a comprehensive, globally representative end-member database of the <i>δ</i><sup>13</sup>C and <i>δ</i><sup>2</sup>H of CH<sub>4</sub> from fossil fuel (conventional natural gas, shale gas, and coal), modern microbial (wetlands, rice paddies, ruminants, termites, and landfills and/or waste) and biomass burning sources. Gas molecular compositional data for fossil fuel categories are also included with the database. The database comprises 10 706 samples (8734 fossil fuel, 1972 non-fossil) from 190 published references. Mean (unweighted) <i>δ</i><sup>13</sup>C signatures for fossil fuel CH<sub>4</sub> are significantly lighter than values commonly used in CH<sub>4</sub> budget models, thus highlighting potential underestimation of fossil fuel CH<sub>4</sub> emissions in previous CH<sub>4</sub> budget models. This living database will be updated every 2–3 years to provide the atmospheric modeling community with the most complete CH<sub>4</sub> source signature data possible. Database digital object identifier (DOI): <a href="https://doi.org/10.15138/G3201T" target="_blank">https://doi.org/10.15138/G3201T</a>.https://www.earth-syst-sci-data.net/9/639/2017/essd-9-639-2017.pdf |
| spellingShingle | O. A. Sherwood O. A. Sherwood S. Schwietzke S. Schwietzke V. A. Arling G. Etiope G. Etiope Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 Earth System Science Data |
| title | Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 |
| title_full | Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 |
| title_fullStr | Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 |
| title_full_unstemmed | Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 |
| title_short | Global Inventory of Gas Geochemistry Data from Fossil Fuel, Microbial and Burning Sources, version 2017 |
| title_sort | global inventory of gas geochemistry data from fossil fuel microbial and burning sources version 2017 |
| url | https://www.earth-syst-sci-data.net/9/639/2017/essd-9-639-2017.pdf |
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