Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season

Special issue Remote Sensing of the Polar Oceans.-- 29 pages, 9 figures, 2 tables 1 appendix The overall volume of freshwater entering the Arctic Ocean has been growing as glaciers melt and river runoff increases. Since 1980, a 20% increase in river runoff has been observed in the Arctic system. As...

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Published in:Remote Sensing
Main Authors: Umbert, Marta, Gabarró, Carolina, Olmedo, Estrella, Gonçalves, Rafael, Guimbard, Sébastien, Martínez, Justino
Other Authors: European Commission, Agencia Estatal de Investigación (España)
Format: Article in Journal/Newspaper
Language:English
Published: Multidisciplinary Digital Publishing Institute 2021
Subjects:
Online Access:http://hdl.handle.net/10261/252466
https://doi.org/10.3390/rs13193828
https://doi.org/10.13039/501100011033
https://doi.org/10.13039/501100000780
id ftcsic:oai:digital.csic.es:10261/252466
record_format openpolar
spelling ftcsic:oai:digital.csic.es:10261/252466 2024-02-11T10:00:33+01:00 Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season Umbert, Marta Gabarró, Carolina Olmedo, Estrella Gonçalves, Rafael Guimbard, Sébastien Martínez, Justino European Commission Agencia Estatal de Investigación (España) 2021-09 http://hdl.handle.net/10261/252466 https://doi.org/10.3390/rs13193828 https://doi.org/10.13039/501100011033 https://doi.org/10.13039/501100000780 en eng Multidisciplinary Digital Publishing Institute #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/840374 info:eu-repo/grantAgreement/EC/H2020/839311 Publisher's version https://doi.org/10.3390/rs13193828 Sí Remote Sensing 13(19): 3828 (2021) CEX2019-000928-S http://hdl.handle.net/10261/252466 doi:10.3390/rs13193828 2072-4292 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100000780 open Arctic Freshwater fluxes Remote sensing Physical oceanography Sea surface salinity Ocean color Data fusion artículo http://purl.org/coar/resource_type/c_6501 2021 ftcsic https://doi.org/10.3390/rs1319382810.13039/50110001103310.13039/501100000780 2024-01-16T11:14:37Z Special issue Remote Sensing of the Polar Oceans.-- 29 pages, 9 figures, 2 tables 1 appendix The overall volume of freshwater entering the Arctic Ocean has been growing as glaciers melt and river runoff increases. Since 1980, a 20% increase in river runoff has been observed in the Arctic system. As the discharges of the Ob, Yenisei, and Lena rivers are an important source of freshwater in the Kara and Laptev Seas, an increase in river discharge might have a significant impact on the upper ocean circulation. The fresh river water mixes with ocean water and forms a large freshened surface layer (FSL), which carries high loads of dissolved organic matter and suspended matter into the Arctic Ocean. Optically active material (e.g., phytoplankton and detrital matter) are spread out into plumes, which are evident in satellite data. Russian river signatures in the Kara and Laptev Seas are also evident in recent SMOS Sea Surface Salinity (SSS) Arctic products. In this study, we compare the new Arctic+ SSS products, produced at the Barcelona Expert Center, with the Ocean Color absorption coefficient of colored detrital matter (CDM) in the Kara and Laptev Seas for the period 2011–2019. The SSS and CDM are found to be strongly negatively correlated in the regions of freshwater influence, with regression coefficients between −0.72 and −0.91 in the studied period. Exploiting this linear correlation, we estimate the SSS back to 1998 using two techniques: one assuming that the relationship between the CDM and SSS varies regionally in the river-influenced areas, and another assuming that it does not. We use the 22-year time-series of reconstructed SSS to estimate the interannual variability of the extension of the FSL in the Kara and Laptev Seas as well as their freshwater content. For the Kara and Laptev Seas, we use 32 and 28 psu as reference salinities, and 26 and 24 psu isohalines as FSL boundaries, respectively. The average FSL extension in the Kara Sea is 2089–2611 km2, with a typical freshwater content of 11.84–14.02 ... Article in Journal/Newspaper Arctic Arctic Ocean Kara Sea laptev Phytoplankton Digital.CSIC (Spanish National Research Council) Arctic Arctic Ocean Kara Sea Remote Sensing 13 19 3828
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language English
topic Arctic
Freshwater fluxes
Remote sensing
Physical oceanography
Sea surface salinity
Ocean color
Data fusion
spellingShingle Arctic
Freshwater fluxes
Remote sensing
Physical oceanography
Sea surface salinity
Ocean color
Data fusion
Umbert, Marta
Gabarró, Carolina
Olmedo, Estrella
Gonçalves, Rafael
Guimbard, Sébastien
Martínez, Justino
Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
topic_facet Arctic
Freshwater fluxes
Remote sensing
Physical oceanography
Sea surface salinity
Ocean color
Data fusion
description Special issue Remote Sensing of the Polar Oceans.-- 29 pages, 9 figures, 2 tables 1 appendix The overall volume of freshwater entering the Arctic Ocean has been growing as glaciers melt and river runoff increases. Since 1980, a 20% increase in river runoff has been observed in the Arctic system. As the discharges of the Ob, Yenisei, and Lena rivers are an important source of freshwater in the Kara and Laptev Seas, an increase in river discharge might have a significant impact on the upper ocean circulation. The fresh river water mixes with ocean water and forms a large freshened surface layer (FSL), which carries high loads of dissolved organic matter and suspended matter into the Arctic Ocean. Optically active material (e.g., phytoplankton and detrital matter) are spread out into plumes, which are evident in satellite data. Russian river signatures in the Kara and Laptev Seas are also evident in recent SMOS Sea Surface Salinity (SSS) Arctic products. In this study, we compare the new Arctic+ SSS products, produced at the Barcelona Expert Center, with the Ocean Color absorption coefficient of colored detrital matter (CDM) in the Kara and Laptev Seas for the period 2011–2019. The SSS and CDM are found to be strongly negatively correlated in the regions of freshwater influence, with regression coefficients between −0.72 and −0.91 in the studied period. Exploiting this linear correlation, we estimate the SSS back to 1998 using two techniques: one assuming that the relationship between the CDM and SSS varies regionally in the river-influenced areas, and another assuming that it does not. We use the 22-year time-series of reconstructed SSS to estimate the interannual variability of the extension of the FSL in the Kara and Laptev Seas as well as their freshwater content. For the Kara and Laptev Seas, we use 32 and 28 psu as reference salinities, and 26 and 24 psu isohalines as FSL boundaries, respectively. The average FSL extension in the Kara Sea is 2089–2611 km2, with a typical freshwater content of 11.84–14.02 ...
author2 European Commission
Agencia Estatal de Investigación (España)
format Article in Journal/Newspaper
author Umbert, Marta
Gabarró, Carolina
Olmedo, Estrella
Gonçalves, Rafael
Guimbard, Sébastien
Martínez, Justino
author_facet Umbert, Marta
Gabarró, Carolina
Olmedo, Estrella
Gonçalves, Rafael
Guimbard, Sébastien
Martínez, Justino
author_sort Umbert, Marta
title Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
title_short Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
title_full Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
title_fullStr Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
title_full_unstemmed Using Remotely Sensed Sea Surface Salinity and Colored Detrital Matter to Characterize Freshened Surface Layers in the Kara and Laptev Seas during the Ice-Free Season
title_sort using remotely sensed sea surface salinity and colored detrital matter to characterize freshened surface layers in the kara and laptev seas during the ice-free season
publisher Multidisciplinary Digital Publishing Institute
publishDate 2021
url http://hdl.handle.net/10261/252466
https://doi.org/10.3390/rs13193828
https://doi.org/10.13039/501100011033
https://doi.org/10.13039/501100000780
geographic Arctic
Arctic Ocean
Kara Sea
geographic_facet Arctic
Arctic Ocean
Kara Sea
genre Arctic
Arctic Ocean
Kara Sea
laptev
Phytoplankton
genre_facet Arctic
Arctic Ocean
Kara Sea
laptev
Phytoplankton
op_relation #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/840374
info:eu-repo/grantAgreement/EC/H2020/839311
Publisher's version
https://doi.org/10.3390/rs13193828

Remote Sensing 13(19): 3828 (2021)
CEX2019-000928-S
http://hdl.handle.net/10261/252466
doi:10.3390/rs13193828
2072-4292
http://dx.doi.org/10.13039/501100011033
http://dx.doi.org/10.13039/501100000780
op_rights open
op_doi https://doi.org/10.3390/rs1319382810.13039/50110001103310.13039/501100000780
container_title Remote Sensing
container_volume 13
container_issue 19
container_start_page 3828
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