Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales
Analysis of winter stream chemistry data from the Afon Hafren in mid-Wales reveals links between stream chemistry and the North Atlantic Oscillation (NAO). K, Y, Al and dissolved organic carbon (DOC) concentrations increase during high NAO index months (relatively warm and wet weather), while Ca, Mg...
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ftcopernicus:oai:publications.copernicus.org:hess39760 2023-05-15T17:27:44+02:00 Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales Ness, L. Neal, C. Davies, T. D. Reynolds, B. 2018-09-27 application/pdf https://doi.org/10.5194/hess-8-409-2004 https://www.hydrol-earth-syst-sci.net/8/409/2004/ eng eng doi:10.5194/hess-8-409-2004 https://www.hydrol-earth-syst-sci.net/8/409/2004/ eISSN: 1607-7938 Text 2018 ftcopernicus https://doi.org/10.5194/hess-8-409-2004 2019-12-24T09:59:20Z Analysis of winter stream chemistry data from the Afon Hafren in mid-Wales reveals links between stream chemistry and the North Atlantic Oscillation (NAO). K, Y, Al and dissolved organic carbon (DOC) concentrations increase during high NAO index months (relatively warm and wet weather), while Ca, Mg and NO 3 concentrations increase during low NAO months (relatively cold and dry conditions) with the increased concentrations lasting into the next month. The cause of the concentration changes varies between constituents: Y, Al and DOC are impacted by short term variations in rainfall; Mg and Ca are influenced by flow conditions; and NO 3 is temperature controlled. The dominant control mechanism for K concentration seems to be related to rainfall after tree felling has taken place but, prior to felling, the relationships are less certain. Keywords: nitrate, potassium, yttrium, aluminium, Dissolved Organic Carbon, magnesium, calcium, North Atlantic Oscillation, stream chemistry, Plynlimon, Hafren Text North Atlantic North Atlantic oscillation Copernicus Publications: E-Journals Hydrology and Earth System Sciences 8 3 409 421 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Analysis of winter stream chemistry data from the Afon Hafren in mid-Wales reveals links between stream chemistry and the North Atlantic Oscillation (NAO). K, Y, Al and dissolved organic carbon (DOC) concentrations increase during high NAO index months (relatively warm and wet weather), while Ca, Mg and NO 3 concentrations increase during low NAO months (relatively cold and dry conditions) with the increased concentrations lasting into the next month. The cause of the concentration changes varies between constituents: Y, Al and DOC are impacted by short term variations in rainfall; Mg and Ca are influenced by flow conditions; and NO 3 is temperature controlled. The dominant control mechanism for K concentration seems to be related to rainfall after tree felling has taken place but, prior to felling, the relationships are less certain. Keywords: nitrate, potassium, yttrium, aluminium, Dissolved Organic Carbon, magnesium, calcium, North Atlantic Oscillation, stream chemistry, Plynlimon, Hafren |
format |
Text |
author |
Ness, L. Neal, C. Davies, T. D. Reynolds, B. |
spellingShingle |
Ness, L. Neal, C. Davies, T. D. Reynolds, B. Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
author_facet |
Ness, L. Neal, C. Davies, T. D. Reynolds, B. |
author_sort |
Ness, L. |
title |
Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
title_short |
Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
title_full |
Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
title_fullStr |
Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
title_full_unstemmed |
Impacts of the North Atlantic Oscillation on stream water chemistry in mid-Wales |
title_sort |
impacts of the north atlantic oscillation on stream water chemistry in mid-wales |
publishDate |
2018 |
url |
https://doi.org/10.5194/hess-8-409-2004 https://www.hydrol-earth-syst-sci.net/8/409/2004/ |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
eISSN: 1607-7938 |
op_relation |
doi:10.5194/hess-8-409-2004 https://www.hydrol-earth-syst-sci.net/8/409/2004/ |
op_doi |
https://doi.org/10.5194/hess-8-409-2004 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
8 |
container_issue |
3 |
container_start_page |
409 |
op_container_end_page |
421 |
_version_ |
1766120021096923136 |