Geochemical Implications of Summer Monsoonal Rainwater Composition over India

Chemical weathering in the Krishna Basin and Western Ghats of the Deccan Traps, India: Rates of basalt weathering and their controls

“…Cl concentration in rainwater from Goa is ϳ135 M, nearly identical (138 M) to that reported for rains from Bombay (Sequeria and Kelkar 1978;Sarin et al, 1989). The value decreases to 50 M and 51 M for the Pune and Sinhagad samples and 11 and 28 M for the Ambolighat and Sangameshwar samples (Table 4a).…”

ACID RAIN: An Assessment Based on Acid-Base Considerations

“…The majority of coastal areas, even unpolluted, do not appear to receive such precipitation as seen from the data 15 ' 16 in Table I where, neither the median nor the volume-weighted average pH is 5.6. These areas are either remote 17 or receive unpolluted air.…”

“…These areas are either remote 17 or receive unpolluted air. 16 Secondly, acid rain is an environmental problem of concern over the continent. Therefore one should not look for a maritime reference pH for such precipitation.…”

“…36 Thus transports to the Carribean, 37 and Mediterranean 38 are well known. Arabian and/or Iranian deserts affect monsoonal deposition of Ca over India 39 while the Central Asian deserts affect environments in China 11 and Japan 40 and on occasion even as far as Hawaii. 41 Mamane et al 38 have shown that both desert and industrial aerosols are equally efficient in the adsorption of acidic S components in the atmosphere.…”

Comments on “Chemistry of monsoon rainwater at Delhi”

“…avoided sampling in polluted areas as we were interested in the country-wide pattern of salt deposition (Sequeira, 1976b;Sequeira and Kelkar, 1978) with minimal local influence. Besides, we operated one station in each area.…”