title: Decomposition of the time series of the pH values of the surface water of the deep Black Sea according to archival data of the second half of the XXth century
abstract: Based on the archival data of the Institute of Natural and Technical Systems for the period from 1956 to 1996 the decomposition of the time series of the pH value of the surface layer of the deep-water part of the Black Sea was carried out with subsequent extrapolation until 2010. The analysis shows that the reconstructed time series is divided into two time interval trends with different sign and data quality: from 1956 to 1976 and from 1977 to 1996. The presence of these two fundamentally diff
journal: Monitoring systems of environment