Brief presentation of the sulphur cycle

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Brief presentation of the sulphur cycle

• Tore Flatlandsmo Berglen Ivar S.A. Isaksen

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Sulphur cycle in OsloCTM2

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Left total column burden of sulphate in July
1996, right sulphate originating from OH ox.
July 1996, unit µg(SO42-) m-2
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How the changes in SO2 from 1985 to 1996 have
affected the formation of sulphate by OH ox. (for
July, in percent)
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Results Sulphate January layer 1 (ppt)

1996 (upper left), 1985 (GEIA lower left) and
difference (19961985, right)
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Comparison with observations SO2 (left, 85
stat.) and sulphate (right, 80 stat.), DJF 1996

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Jergul Esrange, model (1985 og 1996) vs.
observations (1996) SO2 (left) and sulphate
(right)

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Jergul, 1996 daily values, model vs.
observations SO2 (left) og sulphate (right)