Mathematics – Logic
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1401s&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 10, p. 1401-1404
Mathematics
Logic
7
Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Theoretical Modeling
Scientific paper
The 36Cl/Cl ratios of annual precipitation samples, collected at 28 meteorological stations over the globe were measured with accelerator mass spectrometry. Local 36Cl fallout rates were obtained from the experimental data and compared with theoretical fluxes deduced from atmospheric cosmogenic production and an atmospheric transport model. Most of the measured fluxes were found to be larger than the predicted cosmogenic ones, up to about one order of magnitude. The deviations are largest in the northern hemisphere and for low latitudes. Recycling of 36Cl from nuclear weapon tests from the biosphere into the troposphere as CH3Cl is proposed as a possible source of the observed difference and can explain the measurements as simulation calculations showed.
Beer Joseph
Blinov Alexey
Kaba M.
Kubik Peter W.
Massonet S.
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