Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate
Here for the first time, we analyze the concentration of dissolved (DOC) and particulate organic carbon (POC), as well as its optical properties (absorbance and fluorescence) from several proglacial streams across Iceland, the location of Europe’s largest non-polar ice cap. We found high spatial var...
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ftmdpi:oai:mdpi.com:/2073-4441/11/4/748/ 2023-08-20T04:06:43+02:00 Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate Peter Chifflard Christina Fasching Martin Reiss Lukas Ditzel Kyle S. Boodoo agris 2019-04-10 application/pdf https://doi.org/10.3390/w11040748 EN eng Multidisciplinary Digital Publishing Institute Water Quality and Contamination https://dx.doi.org/10.3390/w11040748 https://creativecommons.org/licenses/by/4.0/ Water; Volume 11; Issue 4; Pages: 748 dissolved and particulate organic carbon proglacial streams glacier Iceland DOM composition Text 2019 ftmdpi https://doi.org/10.3390/w11040748 2023-07-31T22:11:06Z Here for the first time, we analyze the concentration of dissolved (DOC) and particulate organic carbon (POC), as well as its optical properties (absorbance and fluorescence) from several proglacial streams across Iceland, the location of Europe’s largest non-polar ice cap. We found high spatial variability of DOC concentrations and dissolved organic matter (DOM) composition during peak melt, sampling 13 proglacial streams draining the 5 main Icelandic glaciers. Although glacial-derived organic matter (OM) was dominated by proteinaceous florescence, organic matter composition was variable among glaciers, often exhibiting relatively higher aromatic content and increased humification (based on absorbance and fluorescence measurements) closer to the glacier terminus, modulated by the presence of glacial lakes. Additional sampling locations the in flow path of the river Hvitá revealed that while POC concentrations decreased downstream, DOC concentrations and the autochthonous fraction of OM increased, suggesting the reworking of the organic carbon by microbial communities, with likely implications for downstream ecosystems as glaciers continue to melt. Based on our measured DOC concentrations ranging from 0.11 mg·L−1 to 0.94 mg·L−1, we estimate a potential annual carbon release of 0.008 ± 0.002 Tg·C·yr−1 from Icelandic glaciers. This non-conservative first estimate serves to highlight the potentially significant contribution of Icelandic pro-glacial streams to the global carbon cycle and the need for the quantification and determination of the spatio-temporal variation of DOC and POC fluxes and their respective drivers, particularly in light of increased rates of melting due to recent trends in climatic warming. Text glacier Ice cap Iceland Polar Ice Cap MDPI Open Access Publishing Water 11 4 748 |
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Open Polar |
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ftmdpi |
language |
English |
topic |
dissolved and particulate organic carbon proglacial streams glacier Iceland DOM composition |
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dissolved and particulate organic carbon proglacial streams glacier Iceland DOM composition Peter Chifflard Christina Fasching Martin Reiss Lukas Ditzel Kyle S. Boodoo Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
topic_facet |
dissolved and particulate organic carbon proglacial streams glacier Iceland DOM composition |
description |
Here for the first time, we analyze the concentration of dissolved (DOC) and particulate organic carbon (POC), as well as its optical properties (absorbance and fluorescence) from several proglacial streams across Iceland, the location of Europe’s largest non-polar ice cap. We found high spatial variability of DOC concentrations and dissolved organic matter (DOM) composition during peak melt, sampling 13 proglacial streams draining the 5 main Icelandic glaciers. Although glacial-derived organic matter (OM) was dominated by proteinaceous florescence, organic matter composition was variable among glaciers, often exhibiting relatively higher aromatic content and increased humification (based on absorbance and fluorescence measurements) closer to the glacier terminus, modulated by the presence of glacial lakes. Additional sampling locations the in flow path of the river Hvitá revealed that while POC concentrations decreased downstream, DOC concentrations and the autochthonous fraction of OM increased, suggesting the reworking of the organic carbon by microbial communities, with likely implications for downstream ecosystems as glaciers continue to melt. Based on our measured DOC concentrations ranging from 0.11 mg·L−1 to 0.94 mg·L−1, we estimate a potential annual carbon release of 0.008 ± 0.002 Tg·C·yr−1 from Icelandic glaciers. This non-conservative first estimate serves to highlight the potentially significant contribution of Icelandic pro-glacial streams to the global carbon cycle and the need for the quantification and determination of the spatio-temporal variation of DOC and POC fluxes and their respective drivers, particularly in light of increased rates of melting due to recent trends in climatic warming. |
format |
Text |
author |
Peter Chifflard Christina Fasching Martin Reiss Lukas Ditzel Kyle S. Boodoo |
author_facet |
Peter Chifflard Christina Fasching Martin Reiss Lukas Ditzel Kyle S. Boodoo |
author_sort |
Peter Chifflard |
title |
Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
title_short |
Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
title_full |
Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
title_fullStr |
Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
title_full_unstemmed |
Dissolved and Particulate Organic Carbon in Icelandic Proglacial Streams: A First Estimate |
title_sort |
dissolved and particulate organic carbon in icelandic proglacial streams: a first estimate |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/w11040748 |
op_coverage |
agris |
genre |
glacier Ice cap Iceland Polar Ice Cap |
genre_facet |
glacier Ice cap Iceland Polar Ice Cap |
op_source |
Water; Volume 11; Issue 4; Pages: 748 |
op_relation |
Water Quality and Contamination https://dx.doi.org/10.3390/w11040748 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w11040748 |
container_title |
Water |
container_volume |
11 |
container_issue |
4 |
container_start_page |
748 |
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1774717990841876480 |