The influence of storm characteristics on sulfate in precipitation |
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| Authors: | Robert M Bloxam James W Hornbeck C Wayne Martin |
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| Institution: | 1. Atmospheric Environment Service, Air Quality Branch, 4905 Dufferin Street, M3H 5T4, Downsview, Ontario, Canada
2. USDA Forest Service, Northeastern Forest Experimental Station, P.O. Box 640, 03824, Durham, NH, USA
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| Abstract: | The effects of storm dynamics on precipitation chemistry were examined using an atmospheric budget for SO4 ? . One hundred storms occurring between 1975 and 1978 at Hubbard Brook Experimental Forest in New Hampshire were used as test data. Concentrations of major ions were usually greater in convective storms than in continuous or layer storms. For example the geometric mean concentrations of SO4 ? in convective and continuous storms were 4.1 and 1.1 mg L?1, respectively. Higher SO4 ? concentrations also occurred when surface wind directions were south or southwest. The summer maximum in convective activity along with the seasonal dependence of surface wind directions and the seasonal atmospheric chemistry cycle can account for the summer maximum in SO4 ? concentrations observed in the northeastern United States. |
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