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Variation in the ionic composition in convective showers in Pune, India

Naik, MS and Khemani, LT and Momin, GA and Rao, PSP and Pillai, AG and Safai, PD (1994) Variation in the ionic composition in convective showers in Pune, India. Tellus, Series B, 46 B (1). pp. 68-75.

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Rain water samples of equal volume (100 ml) were collected sequentially from 5 convective shower events for a period of 2 years during the summer monsoon seasons of 1988 and 1989 at Pune. A marked decrease in the concentrations of soil-oriented elements Na+, K+, Ca2+ and Mg2+ was observed in the first few samples in all the events followed by a decrease in pH of the subsequent samples. Surprisingly, SO42- also showed similar variation, indicating that soil is contributing some SO42- in rain water. Washout process appears to be an important mechanism for the removal of the major ions from the atmosphere. However, rainout processes seem to be important for the removal of NO3- ions. The study points out that sequential sampling during a single shower appears to give better information about the relationship among H+, Na+, K+, Ca2+, Mg2+, SO42- and NO3- as compared to bulk sampling for longer duration.

Item Type: Article
Additional Information: Copyright of this article belongs to Munksgaard
Uncontrolled Keywords: convective shower; ionic composition; rainwater sample; sequential sampling, India, Pune, Acidity; Atmospheric Effects; Ionic Composition; Rainfall
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 19 May 2015 06:08
Last Modified: 19 May 2015 06:08

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