Three-dimensional model synthesis of the global methane cycle
The geographic and seasonal emission distributions of the major sources and sinks of atmospheric methane were compiled using methane flux measurements and energy and agricultural statistics in conjunction with global digital data bases of land surface characteristics and anthropogenic activities. Ch...
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ftcdlib:qt8c25p66v 2023-05-15T18:40:35+02:00 Three-dimensional model synthesis of the global methane cycle Fung, I. John, J. Lerner, J. Matthews, E. Prather, M. Steele, L. P Fraser, P. J 13033 1991-01-01 application/pdf http://www.escholarship.org/uc/item/8c25p66v english eng eScholarship, University of California qt8c25p66v http://www.escholarship.org/uc/item/8c25p66v Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Fung, I.; John, J.; Lerner, J.; Matthews, E.; Prather, M.; Steele, L. P; et al.(1991). Three-dimensional model synthesis of the global methane cycle. Journal of Geophysical Research, 96(D7), 13033. doi:10.1029/91JD01247. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/8c25p66v Physical Sciences and Mathematics atmospheric carbon-monoxide general-circulation model tropospheric methane southern-hemisphere spectroscopic measurements isotopic composition seasonal cycles boundary-layer rice paddies tracer model article 1991 ftcdlib https://doi.org/10.1029/91JD01247 2016-04-02T18:20:42Z The geographic and seasonal emission distributions of the major sources and sinks of atmospheric methane were compiled using methane flux measurements and energy and agricultural statistics in conjunction with global digital data bases of land surface characteristics and anthropogenic activities. Chemical destruction of methane in the atmosphere was calculated using three-dimensional OH fields every 5 days taken from Spivakovsky et al. (1990a, b). The signatures of each of the sources and sinks in the atmosphere were simulated using a global three-dimensional tracer transport model. Candidate methane budget scenarios were constructed according to mass balance of methane and its carbon isotopes. The verisimilitude of the scenarios was tested by their ability to reproduce the meridional gradient and seasonal variations of methane observed in the atmosphere. Constraints imposed by all the atmospheric observations are satisfied simultaneously by several budget scenarios. A preferred budget comprises annual destruction rates of 450 Tg by OH oxidation and 10 Tg by soil absorption and annual emissions of 80 Tg from fossil sources, 80 Tg from domestic animals, and 35 Tg from wetlands and tundra poleward of 50°N. Emissions from landfills, tropical swamps, rice fields, biomass burning, and termites total 295 Tg; however, the individual contributions of these terms cannot be determined uniquely because of the lack of measurements of direct fluxes and of atmospheric methane variations in regions where these sources are concentrated. Article in Journal/Newspaper Tundra University of California: eScholarship Journal of Geophysical Research 96 D7 13033 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics atmospheric carbon-monoxide general-circulation model tropospheric methane southern-hemisphere spectroscopic measurements isotopic composition seasonal cycles boundary-layer rice paddies tracer model |
spellingShingle |
Physical Sciences and Mathematics atmospheric carbon-monoxide general-circulation model tropospheric methane southern-hemisphere spectroscopic measurements isotopic composition seasonal cycles boundary-layer rice paddies tracer model Fung, I. John, J. Lerner, J. Matthews, E. Prather, M. Steele, L. P Fraser, P. J Three-dimensional model synthesis of the global methane cycle |
topic_facet |
Physical Sciences and Mathematics atmospheric carbon-monoxide general-circulation model tropospheric methane southern-hemisphere spectroscopic measurements isotopic composition seasonal cycles boundary-layer rice paddies tracer model |
description |
The geographic and seasonal emission distributions of the major sources and sinks of atmospheric methane were compiled using methane flux measurements and energy and agricultural statistics in conjunction with global digital data bases of land surface characteristics and anthropogenic activities. Chemical destruction of methane in the atmosphere was calculated using three-dimensional OH fields every 5 days taken from Spivakovsky et al. (1990a, b). The signatures of each of the sources and sinks in the atmosphere were simulated using a global three-dimensional tracer transport model. Candidate methane budget scenarios were constructed according to mass balance of methane and its carbon isotopes. The verisimilitude of the scenarios was tested by their ability to reproduce the meridional gradient and seasonal variations of methane observed in the atmosphere. Constraints imposed by all the atmospheric observations are satisfied simultaneously by several budget scenarios. A preferred budget comprises annual destruction rates of 450 Tg by OH oxidation and 10 Tg by soil absorption and annual emissions of 80 Tg from fossil sources, 80 Tg from domestic animals, and 35 Tg from wetlands and tundra poleward of 50°N. Emissions from landfills, tropical swamps, rice fields, biomass burning, and termites total 295 Tg; however, the individual contributions of these terms cannot be determined uniquely because of the lack of measurements of direct fluxes and of atmospheric methane variations in regions where these sources are concentrated. |
format |
Article in Journal/Newspaper |
author |
Fung, I. John, J. Lerner, J. Matthews, E. Prather, M. Steele, L. P Fraser, P. J |
author_facet |
Fung, I. John, J. Lerner, J. Matthews, E. Prather, M. Steele, L. P Fraser, P. J |
author_sort |
Fung, I. |
title |
Three-dimensional model synthesis of the global methane cycle |
title_short |
Three-dimensional model synthesis of the global methane cycle |
title_full |
Three-dimensional model synthesis of the global methane cycle |
title_fullStr |
Three-dimensional model synthesis of the global methane cycle |
title_full_unstemmed |
Three-dimensional model synthesis of the global methane cycle |
title_sort |
three-dimensional model synthesis of the global methane cycle |
publisher |
eScholarship, University of California |
publishDate |
1991 |
url |
http://www.escholarship.org/uc/item/8c25p66v |
op_coverage |
13033 |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Fung, I.; John, J.; Lerner, J.; Matthews, E.; Prather, M.; Steele, L. P; et al.(1991). Three-dimensional model synthesis of the global methane cycle. Journal of Geophysical Research, 96(D7), 13033. doi:10.1029/91JD01247. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/8c25p66v |
op_relation |
qt8c25p66v http://www.escholarship.org/uc/item/8c25p66v |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/91JD01247 |
container_title |
Journal of Geophysical Research |
container_volume |
96 |
container_issue |
D7 |
container_start_page |
13033 |
_version_ |
1766229973335539712 |