Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years
Interest in long time series of organic matter data has recently increased due to concerns about the effects of global climate change on aquatic ecosystems. This study presents and evaluates unique time series of chemical oxygen demand (COD) and water color from Lake Mälaren, Sweden, stretching almo...
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Royal Swedish Academy of Sciences
2010
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ftbioone:10.1007/s13280-010-0019-2 2024-06-02T08:11:22+00:00 Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja world 2010-03-01 text/HTML https://doi.org/10.1007/s13280-010-0019-2 en eng Royal Swedish Academy of Sciences doi:10.1007/s13280-010-0019-2 All rights reserved. https://doi.org/10.1007/s13280-010-0019-2 Text 2010 ftbioone https://doi.org/10.1007/s13280-010-0019-2 2024-05-07T00:47:03Z Interest in long time series of organic matter data has recently increased due to concerns about the effects of global climate change on aquatic ecosystems. This study presents and evaluates unique time series of chemical oxygen demand (COD) and water color from Lake Mälaren, Sweden, stretching almost seven decades (1935–2004). A negative linear trend was found in COD, but not in water color. The decrease was mainly due to installation of sewage works around 1970. Time series of COD and water color had cyclic pattern. It was strongest for COD, with 23 years periodicity. Similar periodicity observed in air temperature and precipitation in Sweden has been attributed to the North Atlantic Oscillation index and solar system orbit, suggesting that COD in Lake Mälaren is partly derived from algae. Discharge influenced water color more than COD, possibly because water color consists of colored substances brought into the lake from surrounding soils. Text North Atlantic North Atlantic oscillation BioOne Online Journals AMBIO 39 2 116 125 |
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English |
description |
Interest in long time series of organic matter data has recently increased due to concerns about the effects of global climate change on aquatic ecosystems. This study presents and evaluates unique time series of chemical oxygen demand (COD) and water color from Lake Mälaren, Sweden, stretching almost seven decades (1935–2004). A negative linear trend was found in COD, but not in water color. The decrease was mainly due to installation of sewage works around 1970. Time series of COD and water color had cyclic pattern. It was strongest for COD, with 23 years periodicity. Similar periodicity observed in air temperature and precipitation in Sweden has been attributed to the North Atlantic Oscillation index and solar system orbit, suggesting that COD in Lake Mälaren is partly derived from algae. Discharge influenced water color more than COD, possibly because water color consists of colored substances brought into the lake from surrounding soils. |
author2 |
L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja |
format |
Text |
author |
L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja |
spellingShingle |
L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
author_facet |
L. Johansson J. Temnerud J. Abrahamsson D. Berggren Kleja |
author_sort |
L. Johansson |
title |
Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
title_short |
Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
title_full |
Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
title_fullStr |
Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
title_full_unstemmed |
Variation in Organic Matter and Water Color in Lake Mälaren During the Past 70 Years |
title_sort |
variation in organic matter and water color in lake mälaren during the past 70 years |
publisher |
Royal Swedish Academy of Sciences |
publishDate |
2010 |
url |
https://doi.org/10.1007/s13280-010-0019-2 |
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world |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
https://doi.org/10.1007/s13280-010-0019-2 |
op_relation |
doi:10.1007/s13280-010-0019-2 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1007/s13280-010-0019-2 |
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AMBIO |
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39 |
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116 |
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125 |
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1800757489989320704 |