pH of rainwater in Coimbra, Portugal: the seasonal variation
Open Access
- 1 July 1983
- journal article
- Published by Stockholm University Press in Tellus B: Chemical and Physical Meteorology
- Vol. 35B (3) , 237-239
- https://doi.org/10.1111/j.1600-0889.1983.tb00026.x
Abstract
Daily measurements of pH and conductivity of rainwater at Coimbra, Portugal in the period between autumn 1978 to autumn 1980 are reported. The average conductivity is 26 μΩ--1 cm-1 and the average pH is 4.75. Neutral salt contribution to conductivity is significant and is highest in autumdwinter. Correlations between neutral salt conductivity and wind direction were found. pH values have a large dispersion and more than 30% of the samples had a pH (5.0. A seasonal variation of 1.2 pH units was found for the acidity with the highest average pH in autumn and the lowest in summer. A bimodal pH frequency distribution was found for the winter and spring seasons with a minimum frequency ranging from 5.7 to 5.3 pH units. DOI: 10.1111/j.1600-0889.1983.tb00026.xKeywords
This publication has 2 references indexed in Scilit:
- Sulphur emissions in EuropeAtmospheric Environment (1967), 1978
- On the relation between pH and the chemical composition in atmospheric precipitationTellus A: Dynamic Meteorology and Oceanography, 1972