EAP - Oil Shale publications

PUBLISHED
SINCE 1984

Oil Shale

ISSN 1736-7492 (Electronic)
ISSN 0208-189X (Print)

Open Access Journal

CiteScore: 2.6

Impact Factor (2022): 1.9

TRENDS IN PRECIPITATION OF AIR POLLUTANTS AT ESTONIAN MONITORING STATIONS 1994–2005; pp. 276–290

PDF | doi: 10.3176/oil.2008.2.09

Authors

K. TREIER, N. KABRAL, Jane Frey

Abstract

This study concentrates mainly on the 12-year time trends of annual average ion concentrations in bulk precipitation from 10 Estonian monitoring stations. Trends revealed by the nonparametric Mann-Kendall test mostly show a statistically significant decline and, according to the order of ion decline per year, three groups of stations could be differentiated: stations directly affected by an industrial region, NE industrial region background stations and natural background stations. Under different international requirements Estonia has undertaken serious obligations to reduce emissions of air pollutants. Total SO₂ emissions from power plants in Estonia have fallen from about 60%, and emission of solid particles decreased twenty times during the period of 1990–2005. The highest decline of Ca concentrations occurred during the first three-year monitoring period of 1994–1996, and a high decline of SO₄-S in 1997–1999 and 2003–2005.

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