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News Browning of waters is related to reduced acid deposition rather than climate warming

The scientific magazine Nature published an article this week about unexpected effects of acid precipitation and water quality, based on research carried out at the Norwegian Institute for Water Research (NIVA) in collaboration with other scientific institutes in several countries. New research results show that increased humus content in water is associated with reduced acid precipitation, and not due to climate change as earlier presumed.

The future trend of humus content in water is of strong public interest. Drinking water purification facilities that take in humus-rich untreated water have to remove the humus by an array of physical and chemical processes before the water can be distributed to consumers. Thus, the humus content in untreated water is important for the costs of water treatment and for water quality as well.

NIVA is a programme centre for an international programme for monitoring water quality related to acid precipitation, (ICP Waters) under the Convention on Long-Range Transboundary Air Pollution (UN-CLRTAP). The Nature article is based on an analysis of the database of ICP Waters that includes 522 lakes and rivers in Norway, Sweden, Finland, Great Britain, the USA and Canada.

Contact information Researcher Heleen de Wit, Research manager Brit Lisa Skjelkvåle Monen, Information manager Bjørn Faafeng: NIVA (Norwegian Institute for Water Research): Gaustadalléen 21, NO-0349 OSLO (email: heleen.de.wit@niva.no ; brit.skjelkvaale@niva.no ; bjoern.faafeng@niva.no)
Phone: +47 22 18 51 00 ; Fax: +47 22 18 52 00
News type Inbrief
File link http://news.bbc.co.uk/2/hi/science/nature/7104114.stm
Source of information Norwegian Institute for Water Research (NIVA)
Subject(s) ANALYSIS AND TESTS , CHARACTERISTICAL PARAMETERS OF WATERS AND SLUDGES , DRINKING WATER AND SANITATION : COMMON PROCESSES OF PURIFICATION AND TREATMENT , RISKS AND CLIMATOLOGY , SANITATION -STRICT PURIFICATION PROCESSES , WATER QUALITY
Relation http://www.emwis.org/topics/watmon
Geographical coverage International
News date 23/11/2007
Working language(s) ENGLISH
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