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| Titel |
Recovery from episodic acidification delayed by drought and high sea salt deposition |
| VerfasserIn |
H. Laudon |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 12, no. 2 ; Nr. 12, no. 2 (2008-03-05), S.363-370 |
| Datensatznummer |
250010560
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| Publikation (Nr.) |
 copernicus.org/hess-12-363-2008.pdf |
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| Zusammenfassung |
| For the prediction of episodic acidification large uncertainties are
connected to climatic variability and its effect on drought conditions and
sea-salt episodes. In this study data on 342 hydrological episodes in 25
Swedish streams, sampled over 10 years, have been analyzed using a recently
developed episode model. The results demonstrate that drought is the most
important factor modulating the magnitude of the anthropogenic influence on
pH and ANC during episodes. These modulating effects are especially
pronounced in southern and central Sweden, where the historically high acid
deposition has resulted in significant S pools in catchment soils. The
results also suggest that the effects of episodic acidification are becoming
less severe in many streams, but this amelioration is less clear in coastal
streams subject to high levels of sea-salt deposition. Concurrently with the
amelioration of the effects of episodic acidification, regional climate
models predict that temperatures will increase in Sweden during the coming
decades, accompanied by reductions in summer precipitation and more frequent
storms during fall and winter in large areas of the country. If these
predictions are realized delays in streams' recovery from episodic
acidification events can be expected. |
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