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Abstract
Two very dissimilar cold frontal occlusions deposited 6 mm and 60 mm of rain respectively at anobservatory in the rural northeastern U.S.A. Water precipitation was carefully observed. in conjunction with other meteorological parameters, through both storm systems.
The concentration of several ionic substances were measured in specimens of rain watercollected during meteorologically homogeneous portions of the two storms.
The rate of chemical precipitation was determined with respect to water precipitation. This rate was constant during the prefrontal stage of both storms, and increased following cold frontalpassage, in the convective side of the systems. Analyses of the time rate of chemical precipitation showed it to be constant during the continuous rain of April 5.
Examinations of the ratio of chloride to sodium through the time history of the storms showsthem to agree with a transport model postulated by Rossby and Egner (1955).
Although the two storms varied considerably with respect to convectivity and prevailing flow, the total amounts of the several ions precipitated were directly proportional to the amount of water precipitated.