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Detailed Reference Information |
Drewer, J., Heal, M.R., Heal, K.V. and Smith, K.A. (2006). Temporal and spatial variation in methyl bromide flux from a salt marsh. Geophysical Research Letters 33: doi: 10.1029/2006GL026814. issn: 0094-8276. |
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Methyl bromide (CH3Br) is a trace gas involved in stratospheric ozone depletion with both anthropogenic and natural sources. Estimates of natural source strengths are highly uncertain. In this study, >320 highly temporally and spatially resolved measurements of CH3Br emissions from a salt marsh in Scotland (56¿00'N, 2¿35'W) were made during one year using eight static enclosures. Net emissions showed both strong seasonal and diurnal cycles. Day-to-day maxima in emissions were associated with sunny days. Emissions dropped to zero when vegetation was removed. Mean measured CH3Br emission was 350 ng m-2 h-1, but a few "hot spots" (measured maximum 4000 ng m-2 h-1) dominated integrated emissions. A crude scale-up of the annual mean emission yields an estimate for global CH3Br emission of ~1 (0.5--3) Gg y-1 (range uses annual mean from lowest and highest emitting enclosures), ~10% the global salt marsh emission regularly quoted in the literature. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Troposphere, composition and chemistry, Biogeosciences, Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912), Biogeosciences, Trace gases, Global Change, Land/atmosphere interactions (1218, 1843, 3322), Atmospheric Processes, Land/atmosphere interactions (1218, 1631, 1843) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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