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  • 1975-1979  (1)
  • 1979  (1)
Document type
  • 1975-1979  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Naturwissenschaften 66 (1979), S. 307-311 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract Present methane concentrations in the northern troposphere average 1.65 ppm. Most CH4 is of recent biogenic origin. 14C analyses indicate that no more than 10% is released by fossil sources. The various CH4-producing ecosystems are described and the total annual production is estimated to lie between 5.9×1014 and 9.3×1014 g/y. CH4 is destroyed through photochemical oxidation mainly in the troposphere. In this process CH2O, H2, and CO are produced as intermediates. Tropospheric CH4 provides an important source of stratospheric water vapor.
    Type of Medium: Electronic Resource
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