Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland
Abstract Changes in the concentration of iron and dissolved organic matter (DOM), and in the colour and fluorescence properties in the River Kiiminkijoki were investigated as functions of the seasonal flow regime over a two‐year period. The iron concentration in filtrates and the ratio of Fe to DOC...
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crwiley:10.1002/esp.3290150702 2024-06-02T08:12:01+00:00 Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland Heikkinen, Kaisa 1990 http://dx.doi.org/10.1002/esp.3290150702 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290150702 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290150702 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 15, issue 7, page 583-596 ISSN 0197-9337 1096-9837 journal-article 1990 crwiley https://doi.org/10.1002/esp.3290150702 2024-05-03T10:44:34Z Abstract Changes in the concentration of iron and dissolved organic matter (DOM), and in the colour and fluorescence properties in the River Kiiminkijoki were investigated as functions of the seasonal flow regime over a two‐year period. The iron concentration in filtrates and the ratio of Fe to DOC in the river increased under low flow conditions and decreased during the flood periods. The colour of the dissolved organic matter increased with increasing iron content, the effect being more pronounced during the warm period of the year than in winter. The ratio of fluorescence to DOC increased during the warm period of the year but not in winter, and decreased rapidly with discharge at the beginning of the flood period in autumn. The results give indications of the origin, formation, nature, and fate of the DOM in the river water. Temperature‐dependent microbiological processes in the formation and sedimentation of iron‐organic colloids seem to be important. Estimates are given for the amounts and transport rates of iron discharged into the Gulf of Bothnia by the river. Article in Journal/Newspaper Northern Finland Wiley Online Library Earth Surface Processes and Landforms 15 7 583 596 |
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English |
description |
Abstract Changes in the concentration of iron and dissolved organic matter (DOM), and in the colour and fluorescence properties in the River Kiiminkijoki were investigated as functions of the seasonal flow regime over a two‐year period. The iron concentration in filtrates and the ratio of Fe to DOC in the river increased under low flow conditions and decreased during the flood periods. The colour of the dissolved organic matter increased with increasing iron content, the effect being more pronounced during the warm period of the year than in winter. The ratio of fluorescence to DOC increased during the warm period of the year but not in winter, and decreased rapidly with discharge at the beginning of the flood period in autumn. The results give indications of the origin, formation, nature, and fate of the DOM in the river water. Temperature‐dependent microbiological processes in the formation and sedimentation of iron‐organic colloids seem to be important. Estimates are given for the amounts and transport rates of iron discharged into the Gulf of Bothnia by the river. |
format |
Article in Journal/Newspaper |
author |
Heikkinen, Kaisa |
spellingShingle |
Heikkinen, Kaisa Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
author_facet |
Heikkinen, Kaisa |
author_sort |
Heikkinen, Kaisa |
title |
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
title_short |
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
title_full |
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
title_fullStr |
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
title_full_unstemmed |
Seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern Finland |
title_sort |
seasonal changes in iron transport and nature of dissolved organic matter in a humic river in northern finland |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/esp.3290150702 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290150702 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290150702 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Earth Surface Processes and Landforms volume 15, issue 7, page 583-596 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.3290150702 |
container_title |
Earth Surface Processes and Landforms |
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15 |
container_issue |
7 |
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583 |
op_container_end_page |
596 |
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1800758338291499008 |