Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia

In the past decades the Arctic has experienced stronger temperature increases than any other region globally. Shifts in hydrological regimes and accelerated permafrost thawing have been observed and are likely to increase mobilization of organic carbon and its transport through rivers into the Arcti...

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Published in:Frontiers in Marine Science
Main Authors: El Kassar, J., Juhls, B., Hieronymi, M., Preusker, R., Morgenstern, A., Fischer, J., Overduin, P.P.
Format: Article in Journal/Newspaper
Language:English
Published: Frontiers Media 2023
Subjects:
Ice
Online Access:https://publications.hereon.de/id/51271
https://publications.hzg.de/id/51271
https://doi.org/10.3389/fmars.2023.1082109
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spelling fthzgzmk:oai:publications.hereon.de:51271 2023-06-11T04:09:05+02:00 Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia El Kassar, J. Juhls, B. Hieronymi, M. Preusker, R. Morgenstern, A. Fischer, J. Overduin, P.P. 2023 https://publications.hereon.de/id/51271 https://publications.hzg.de/id/51271 https://doi.org/10.3389/fmars.2023.1082109 en eng Frontiers Media https://dx.doi.org/10.3389/fmars.2023.1082109 urn:issn:2296-7745 https://publications.hereon.de/id/51271 https://publications.hzg.de/id/51271 info:eu-repo/semantics/openAccess open_access oa_gold issn:2296-7745 El Kassar, J.; Juhls, B.; Hieronymi, M.; Preusker, R.; Morgenstern, A.; Fischer, J.; Overduin, P.P. : Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia. In: Frontiers in Marine Science. Vol. 10 (2023) 1082109. (DOI: /10.3389/fmars.2023.1082109) info:eu-repo/semantics/article Zeitschrift Artikel 2023 fthzgzmk https://doi.org/10.3389/fmars.2023.1082109 2023-05-28T23:25:38Z In the past decades the Arctic has experienced stronger temperature increases than any other region globally. Shifts in hydrological regimes and accelerated permafrost thawing have been observed and are likely to increase mobilization of organic carbon and its transport through rivers into the Arctic Ocean. In order to better quantify changes to the carbon cycle, Arctic rivers such as the Lena River in Siberia need to be monitored closely. Since 2018, a sampling program provides frequent in situ observations of dissolved organic carbon (DOC) and colored dissolved organic matter (CDOM) of the Lena River. Here, we utilize this ground truth dataset and aim to test the potential of frequent satellite observations to spatially and temporally complement and expand these observations. We explored all available overpasses (~3250) of the Ocean and Land Colour Instrument (OLCI) on Sentinel-3 within the ice-free periods (May – October) for four years (2018 to 2021) to develop a new retrieval scheme to derive concentrations of DOC. OLCI observations with a spatial resolution of ~300 m were corrected for atmospheric effects using the Polymer algorithm. The results of this study show that using this new retrieval, remotely sensed DOC concentrations agree well with in situ DOC concentrations (MAPD=10.89%, RMSE=1.55 mg L−1, r²=0.92, n=489). The high revisit frequency and wide swath of OLCI allow it to capture the entire range of DOC concentrations and their seasonal variability. Estimated satellite-derived DOC export fluxes integrated over the ice-free periods of 2018 to 2021 show a high interannual variability and agree well with flux estimates from in situ data (RMSD=0.186 Tg C, MAPD=4.05%). In addition, 10-day OLCI composites covering the entire Lena River catchment revealed increasing DOC concentration and local sources of DOC along the Lena from south to north. We conclude that moderate resolution satellite imagers such as OLCI are very capable of observing DOC concentrations in large/wide rivers such as the Lena River ... Article in Journal/Newspaper Arctic Arctic Ocean Ice lena river permafrost Siberia Hereon Publications (Helmholtz-Zentrum) Arctic Arctic Ocean Frontiers in Marine Science 10
institution Open Polar
collection Hereon Publications (Helmholtz-Zentrum)
op_collection_id fthzgzmk
language English
description In the past decades the Arctic has experienced stronger temperature increases than any other region globally. Shifts in hydrological regimes and accelerated permafrost thawing have been observed and are likely to increase mobilization of organic carbon and its transport through rivers into the Arctic Ocean. In order to better quantify changes to the carbon cycle, Arctic rivers such as the Lena River in Siberia need to be monitored closely. Since 2018, a sampling program provides frequent in situ observations of dissolved organic carbon (DOC) and colored dissolved organic matter (CDOM) of the Lena River. Here, we utilize this ground truth dataset and aim to test the potential of frequent satellite observations to spatially and temporally complement and expand these observations. We explored all available overpasses (~3250) of the Ocean and Land Colour Instrument (OLCI) on Sentinel-3 within the ice-free periods (May – October) for four years (2018 to 2021) to develop a new retrieval scheme to derive concentrations of DOC. OLCI observations with a spatial resolution of ~300 m were corrected for atmospheric effects using the Polymer algorithm. The results of this study show that using this new retrieval, remotely sensed DOC concentrations agree well with in situ DOC concentrations (MAPD=10.89%, RMSE=1.55 mg L−1, r²=0.92, n=489). The high revisit frequency and wide swath of OLCI allow it to capture the entire range of DOC concentrations and their seasonal variability. Estimated satellite-derived DOC export fluxes integrated over the ice-free periods of 2018 to 2021 show a high interannual variability and agree well with flux estimates from in situ data (RMSD=0.186 Tg C, MAPD=4.05%). In addition, 10-day OLCI composites covering the entire Lena River catchment revealed increasing DOC concentration and local sources of DOC along the Lena from south to north. We conclude that moderate resolution satellite imagers such as OLCI are very capable of observing DOC concentrations in large/wide rivers such as the Lena River ...
format Article in Journal/Newspaper
author El Kassar, J.
Juhls, B.
Hieronymi, M.
Preusker, R.
Morgenstern, A.
Fischer, J.
Overduin, P.P.
spellingShingle El Kassar, J.
Juhls, B.
Hieronymi, M.
Preusker, R.
Morgenstern, A.
Fischer, J.
Overduin, P.P.
Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
author_facet El Kassar, J.
Juhls, B.
Hieronymi, M.
Preusker, R.
Morgenstern, A.
Fischer, J.
Overduin, P.P.
author_sort El Kassar, J.
title Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
title_short Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
title_full Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
title_fullStr Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
title_full_unstemmed Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia
title_sort optical remote sensing (sentinel 3 olci) used to monitor dissolved organic carbon in the lena river, russia
publisher Frontiers Media
publishDate 2023
url https://publications.hereon.de/id/51271
https://publications.hzg.de/id/51271
https://doi.org/10.3389/fmars.2023.1082109
geographic Arctic
Arctic Ocean
geographic_facet Arctic
Arctic Ocean
genre Arctic
Arctic Ocean
Ice
lena river
permafrost
Siberia
genre_facet Arctic
Arctic Ocean
Ice
lena river
permafrost
Siberia
op_source issn:2296-7745
El Kassar, J.; Juhls, B.; Hieronymi, M.; Preusker, R.; Morgenstern, A.; Fischer, J.; Overduin, P.P. : Optical remote sensing (Sentinel 3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia. In: Frontiers in Marine Science. Vol. 10 (2023) 1082109. (DOI: /10.3389/fmars.2023.1082109)
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