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Title: Biogeochemical aspects of atmospheric methane

Abstract

Methane is the most abundant organic chemical in Earth's atmosphere, and its concentration is increasing with time. Photochemical reactions oxidize methane in the atmosphere; through these reactions, methane exerts strong influence over the chemistry of the troposphere and the stratosphere and many species including ozone, hydroxyl radicals, and carbon monoxide. Also, through its infrared absorption spectrum, methane is an important greenhouse gas in the climate system. The key roles and reactions of methane are described and enumerated. Two kinds of methane production are examined in detail: microbial and thermogenic. Microbial methanogenesis is described, and key organisms and substrates are identified along with their properties and habitats. Microbial methane oxidation limits the release of methane from certain methanogenic areas. Both aerobic and anaerobic oxidation are described along with methods to measure rates of methane production and oxidation experimentally. Indicators of the origin of methane, including C and H isotopes, are reviewed. Several constraints on the budget of atmospheric methane, its sources, sinks and residence time are identified and evaluated. From these constraints and other data on sources and inks, a list of sources and sinks, identities, and sizes are constructed. 299 refs., 11 figs., 4 tabs.

Authors:
;  [1]
  1. (National Center for Atmospheric Research, Boulder, CO (USA))
Publication Date:
OSTI Identifier:
6704984
Alternate Identifier(s):
OSTI ID: 6704984
Resource Type:
Journal Article
Journal Name:
Global Biogeochemical Cycles; (USA)
Additional Journal Information:
Journal Volume: 2:4; Journal ID: ISSN 0886-6236
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; METHANE; ECOLOGICAL CONCENTRATION; AIR POLLUTION; ATMOSPHERIC CHEMISTRY; BIOGEOCHEMISTRY; INFRARED SPECTRA; METHANOGENIC BACTERIA; OXIDATION; PHOTOCHEMICAL REACTIONS; SINKS; ALKANES; BACTERIA; CHEMICAL REACTIONS; CHEMISTRY; GEOCHEMISTRY; HYDROCARBONS; MICROORGANISMS; ORGANIC COMPOUNDS; POLLUTION; SPECTRA 540120* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-); 560300 -- Chemicals Metabolism & Toxicology

Citation Formats

Cicerone, R.J., and Oremland, R.S. Biogeochemical aspects of atmospheric methane. United States: N. p., 1988. Web. doi:10.1029/GB002i004p00299.
Cicerone, R.J., & Oremland, R.S. Biogeochemical aspects of atmospheric methane. United States. doi:10.1029/GB002i004p00299.
Cicerone, R.J., and Oremland, R.S. Thu . "Biogeochemical aspects of atmospheric methane". United States. doi:10.1029/GB002i004p00299.
@article{osti_6704984,
title = {Biogeochemical aspects of atmospheric methane},
author = {Cicerone, R.J. and Oremland, R.S.},
abstractNote = {Methane is the most abundant organic chemical in Earth's atmosphere, and its concentration is increasing with time. Photochemical reactions oxidize methane in the atmosphere; through these reactions, methane exerts strong influence over the chemistry of the troposphere and the stratosphere and many species including ozone, hydroxyl radicals, and carbon monoxide. Also, through its infrared absorption spectrum, methane is an important greenhouse gas in the climate system. The key roles and reactions of methane are described and enumerated. Two kinds of methane production are examined in detail: microbial and thermogenic. Microbial methanogenesis is described, and key organisms and substrates are identified along with their properties and habitats. Microbial methane oxidation limits the release of methane from certain methanogenic areas. Both aerobic and anaerobic oxidation are described along with methods to measure rates of methane production and oxidation experimentally. Indicators of the origin of methane, including C and H isotopes, are reviewed. Several constraints on the budget of atmospheric methane, its sources, sinks and residence time are identified and evaluated. From these constraints and other data on sources and inks, a list of sources and sinks, identities, and sizes are constructed. 299 refs., 11 figs., 4 tabs.},
doi = {10.1029/GB002i004p00299},
journal = {Global Biogeochemical Cycles; (USA)},
issn = {0886-6236},
number = ,
volume = 2:4,
place = {United States},
year = {1988},
month = {12}
}