From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia
Connectivity between the terrestrial and marine environment in the Artic is changing as a result of climate change, influencing both freshwater budgets and the supply of carbon to the sea. This study characterizes the optical properties of dissolved organic matter (DOM) within the Lena Delta region...
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ftdoajarticles:oai:doaj.org/article:675b3c6e6181414fb60a15f539cce7f8 2023-05-15T15:10:08+02:00 From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia Rafael eGonçalves-Araujo Colin Andrew Stedmon Birgit eHeim Ivan eDubinenkov Alexandra eKraberg Denis eMoiseev Astrid eBracher 2015-12-01T00:00:00Z https://doi.org/10.3389/fmars.2015.00108 https://doaj.org/article/675b3c6e6181414fb60a15f539cce7f8 EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/fmars.2015.00108/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2015.00108 https://doaj.org/article/675b3c6e6181414fb60a15f539cce7f8 Frontiers in Marine Science, Vol 2 (2015) Arctic DOC parafac CDOM Hydrography optical indices Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2015 ftdoajarticles https://doi.org/10.3389/fmars.2015.00108 2022-12-31T14:06:00Z Connectivity between the terrestrial and marine environment in the Artic is changing as a result of climate change, influencing both freshwater budgets and the supply of carbon to the sea. This study characterizes the optical properties of dissolved organic matter (DOM) within the Lena Delta region and evaluates the behavior of DOM across the fresh water-marine gradient. Six fluorescent components (four humic-like; one marine humic-like; one protein-like) were identified by Parallel Factor Analysis (PARAFAC) with a clear dominance of allochthonous humic-like signals. Colored DOM (CDOM) and dissolved organic carbon (DOC) were highly correlated and had their distribution coupled with hydrographical conditions. Higher DOM concentration and degree of humification were associated with the low salinity waters of the Lena River. Values decreased towards the higher salinity Laptev Sea shelf waters. Results demonstrate different responses of DOM mixing in relation to the vertical structure of the water column, as reflecting the hydrographical dynamics in the region. Two mixing curves for DOM were apparent. In surface waters above the pycnocline there was a sharper decrease in DOM concentration in relation to salinity indicating removal. In the bottom water layer the DOM decrease within salinity was less. We propose there is a removal of DOM occurring primarily at the surface layer, which is likely driven by photodegradation and flocculation. Article in Journal/Newspaper Arctic Climate change laptev Laptev Sea lena delta lena river Siberia Directory of Open Access Journals: DOAJ Articles Arctic Laptev Sea Frontiers in Marine Science 2 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic DOC parafac CDOM Hydrography optical indices Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Arctic DOC parafac CDOM Hydrography optical indices Science Q General. Including nature conservation geographical distribution QH1-199.5 Rafael eGonçalves-Araujo Colin Andrew Stedmon Birgit eHeim Ivan eDubinenkov Alexandra eKraberg Denis eMoiseev Astrid eBracher From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
topic_facet |
Arctic DOC parafac CDOM Hydrography optical indices Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Connectivity between the terrestrial and marine environment in the Artic is changing as a result of climate change, influencing both freshwater budgets and the supply of carbon to the sea. This study characterizes the optical properties of dissolved organic matter (DOM) within the Lena Delta region and evaluates the behavior of DOM across the fresh water-marine gradient. Six fluorescent components (four humic-like; one marine humic-like; one protein-like) were identified by Parallel Factor Analysis (PARAFAC) with a clear dominance of allochthonous humic-like signals. Colored DOM (CDOM) and dissolved organic carbon (DOC) were highly correlated and had their distribution coupled with hydrographical conditions. Higher DOM concentration and degree of humification were associated with the low salinity waters of the Lena River. Values decreased towards the higher salinity Laptev Sea shelf waters. Results demonstrate different responses of DOM mixing in relation to the vertical structure of the water column, as reflecting the hydrographical dynamics in the region. Two mixing curves for DOM were apparent. In surface waters above the pycnocline there was a sharper decrease in DOM concentration in relation to salinity indicating removal. In the bottom water layer the DOM decrease within salinity was less. We propose there is a removal of DOM occurring primarily at the surface layer, which is likely driven by photodegradation and flocculation. |
format |
Article in Journal/Newspaper |
author |
Rafael eGonçalves-Araujo Colin Andrew Stedmon Birgit eHeim Ivan eDubinenkov Alexandra eKraberg Denis eMoiseev Astrid eBracher |
author_facet |
Rafael eGonçalves-Araujo Colin Andrew Stedmon Birgit eHeim Ivan eDubinenkov Alexandra eKraberg Denis eMoiseev Astrid eBracher |
author_sort |
Rafael eGonçalves-Araujo |
title |
From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
title_short |
From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
title_full |
From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
title_fullStr |
From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
title_full_unstemmed |
From fresh to marine waters: characterization and fate of dissolved organic matter in the Lena River delta region, Siberia |
title_sort |
from fresh to marine waters: characterization and fate of dissolved organic matter in the lena river delta region, siberia |
publisher |
Frontiers Media S.A. |
publishDate |
2015 |
url |
https://doi.org/10.3389/fmars.2015.00108 https://doaj.org/article/675b3c6e6181414fb60a15f539cce7f8 |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic Climate change laptev Laptev Sea lena delta lena river Siberia |
genre_facet |
Arctic Climate change laptev Laptev Sea lena delta lena river Siberia |
op_source |
Frontiers in Marine Science, Vol 2 (2015) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/fmars.2015.00108/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2015.00108 https://doaj.org/article/675b3c6e6181414fb60a15f539cce7f8 |
op_doi |
https://doi.org/10.3389/fmars.2015.00108 |
container_title |
Frontiers in Marine Science |
container_volume |
2 |
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1766341181193584640 |