Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence
The Arctic Ocean receives a large supply of dissolved organic matter (DOM) from its catchment and shelf sediments, which can be traced across much of the basin’s upper waters. This signature can potentially be used as a tracer. On the shelf, the combination of river discharge and sea-ice formation,...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/53235/ https://oceanrep.geomar.de/id/eprint/53235/1/2021JC017407.pdf https://oceanrep.geomar.de/id/eprint/53235/2/2021jc017407-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/53235/8/2021JC017407.pdf https://doi.org/10.1029/2021JC017407 |
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ftoceanrep:oai:oceanrep.geomar.de:53235 2024-02-11T09:59:42+01:00 Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence Stedmon, Colin A. Amon, Rainer M.W. Bauch, Dorothea Bracher, Astrid Gonçalves‐Araujo, Rafael Hoppmann, Mario Krishfield, Richard Laney, Samuel Rabe, Benjamin Reader, Heather Granskog, Mats A. 2021-07 text other https://oceanrep.geomar.de/id/eprint/53235/ https://oceanrep.geomar.de/id/eprint/53235/1/2021JC017407.pdf https://oceanrep.geomar.de/id/eprint/53235/2/2021jc017407-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/53235/8/2021JC017407.pdf https://doi.org/10.1029/2021JC017407 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/53235/1/2021JC017407.pdf https://oceanrep.geomar.de/id/eprint/53235/2/2021jc017407-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/53235/8/2021JC017407.pdf Stedmon, C. A., Amon, R. M. W., Bauch, D. , Bracher, A., Gonçalves‐Araujo, R., Hoppmann, M., Krishfield, R., Laney, S., Rabe, B., Reader, H. and Granskog, M. A. (2021) Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence. Open Access Journal of Geophysical Research: Oceans, 126 (7). e2021JC017407. DOI 10.1029/2021JC017407 <https://doi.org/10.1029/2021JC017407>. doi:10.1029/2021JC017407 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2021JC017407 2024-01-15T00:23:45Z The Arctic Ocean receives a large supply of dissolved organic matter (DOM) from its catchment and shelf sediments, which can be traced across much of the basin’s upper waters. This signature can potentially be used as a tracer. On the shelf, the combination of river discharge and sea-ice formation, modifies water densities and mixing considerably. These waters are a source of the halocline layer that covers much of the Arctic Ocean, but also contain elevated levels of DOM. Here we demonstrate how this can be used as a supplementary tracer and contribute to evaluating ocean circulation in the Arctic. A fraction of the organic compounds that DOM consists of fluoresce and can be measured using in-situ fluorometers. When deployed on autonomous platforms these provide high temporal and spatial resolution measurements over long periods. The results of an analysis of data derived from several Ice Tethered Profilers (ITPs) offer a unique spatial coverage of the distribution of DOM in the surface 800m below Arctic sea-ice. Water mass analysis using temperature, salinity and DOM fluorescence, can clearly distinguish between the contribution of Siberian terrestrial DOM and marine DOM from the Chukchi shelf to the waters of the halocline. The findings offer a new approach to trace the distribution of Pacific waters and its export from the Arctic Ocean. Our results indicate the potential to extend the approach to separate freshwater contributions from, sea-ice melt, riverine discharge and the Pacific Ocean. Key Points: Arctic surface waters with comparable temperature and salinity have contrasting in situ dissolved organic matter fluorescence. Organic matter fluorescence can tracklow salinity waters feeding into the Transpolar Drift and haloclinelayers. Siberian and Chukchishelf waters can be separated based on their fluorescence to salinity relationship Article in Journal/Newspaper Arctic Arctic Arctic Ocean Chukchi Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Pacific Journal of Geophysical Research: Oceans 126 7 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Arctic Ocean receives a large supply of dissolved organic matter (DOM) from its catchment and shelf sediments, which can be traced across much of the basin’s upper waters. This signature can potentially be used as a tracer. On the shelf, the combination of river discharge and sea-ice formation, modifies water densities and mixing considerably. These waters are a source of the halocline layer that covers much of the Arctic Ocean, but also contain elevated levels of DOM. Here we demonstrate how this can be used as a supplementary tracer and contribute to evaluating ocean circulation in the Arctic. A fraction of the organic compounds that DOM consists of fluoresce and can be measured using in-situ fluorometers. When deployed on autonomous platforms these provide high temporal and spatial resolution measurements over long periods. The results of an analysis of data derived from several Ice Tethered Profilers (ITPs) offer a unique spatial coverage of the distribution of DOM in the surface 800m below Arctic sea-ice. Water mass analysis using temperature, salinity and DOM fluorescence, can clearly distinguish between the contribution of Siberian terrestrial DOM and marine DOM from the Chukchi shelf to the waters of the halocline. The findings offer a new approach to trace the distribution of Pacific waters and its export from the Arctic Ocean. Our results indicate the potential to extend the approach to separate freshwater contributions from, sea-ice melt, riverine discharge and the Pacific Ocean. Key Points: Arctic surface waters with comparable temperature and salinity have contrasting in situ dissolved organic matter fluorescence. Organic matter fluorescence can tracklow salinity waters feeding into the Transpolar Drift and haloclinelayers. Siberian and Chukchishelf waters can be separated based on their fluorescence to salinity relationship |
format |
Article in Journal/Newspaper |
author |
Stedmon, Colin A. Amon, Rainer M.W. Bauch, Dorothea Bracher, Astrid Gonçalves‐Araujo, Rafael Hoppmann, Mario Krishfield, Richard Laney, Samuel Rabe, Benjamin Reader, Heather Granskog, Mats A. |
spellingShingle |
Stedmon, Colin A. Amon, Rainer M.W. Bauch, Dorothea Bracher, Astrid Gonçalves‐Araujo, Rafael Hoppmann, Mario Krishfield, Richard Laney, Samuel Rabe, Benjamin Reader, Heather Granskog, Mats A. Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
author_facet |
Stedmon, Colin A. Amon, Rainer M.W. Bauch, Dorothea Bracher, Astrid Gonçalves‐Araujo, Rafael Hoppmann, Mario Krishfield, Richard Laney, Samuel Rabe, Benjamin Reader, Heather Granskog, Mats A. |
author_sort |
Stedmon, Colin A. |
title |
Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
title_short |
Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
title_full |
Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
title_fullStr |
Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
title_full_unstemmed |
Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence |
title_sort |
insights into water mass origins in the central arctic ocean from in‐situ dissolved organic matter fluorescence |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/53235/ https://oceanrep.geomar.de/id/eprint/53235/1/2021JC017407.pdf https://oceanrep.geomar.de/id/eprint/53235/2/2021jc017407-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/53235/8/2021JC017407.pdf https://doi.org/10.1029/2021JC017407 |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Chukchi Shelf Pacific |
geographic_facet |
Arctic Arctic Ocean Chukchi Shelf Pacific |
genre |
Arctic Arctic Arctic Ocean Chukchi Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Chukchi Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/53235/1/2021JC017407.pdf https://oceanrep.geomar.de/id/eprint/53235/2/2021jc017407-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/53235/8/2021JC017407.pdf Stedmon, C. A., Amon, R. M. W., Bauch, D. , Bracher, A., Gonçalves‐Araujo, R., Hoppmann, M., Krishfield, R., Laney, S., Rabe, B., Reader, H. and Granskog, M. A. (2021) Insights into Water Mass Origins in the Central Arctic Ocean from in‐situ Dissolved Organic Matter Fluorescence. Open Access Journal of Geophysical Research: Oceans, 126 (7). e2021JC017407. DOI 10.1029/2021JC017407 <https://doi.org/10.1029/2021JC017407>. doi:10.1029/2021JC017407 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021JC017407 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
7 |
_version_ |
1790595490276966400 |