Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic)
Hydrographic and stable isotope (δ18O) data from 4 summer surveys in the Laptev Sea are used to derive fractions of sea-ice meltwater and river water. Sea-ice meltwater fractions are found to be correlated to river water fractions. While initial heat of river discharge is too small to melt the obser...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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AGU (American Geophysical Union)
2013
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Online Access: | https://oceanrep.geomar.de/id/eprint/20108/ https://oceanrep.geomar.de/id/eprint/20108/1/JGRinpress-SeaIceMeltingLS-authors-final.pdf https://oceanrep.geomar.de/id/eprint/20108/7/jgrc20076.pdf https://doi.org/10.1002/jgrc.20076 |
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ftoceanrep:oai:oceanrep.geomar.de:20108 2023-05-15T14:27:28+02:00 Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) Bauch, Dorothea Hölemann, Jens A. Nikulina, Anna Wegner, Carolyn Janout, Markus A. Timokhov, Leonid A. Kassens, Heidemarie 2013 text https://oceanrep.geomar.de/id/eprint/20108/ https://oceanrep.geomar.de/id/eprint/20108/1/JGRinpress-SeaIceMeltingLS-authors-final.pdf https://oceanrep.geomar.de/id/eprint/20108/7/jgrc20076.pdf https://doi.org/10.1002/jgrc.20076 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/20108/1/JGRinpress-SeaIceMeltingLS-authors-final.pdf https://oceanrep.geomar.de/id/eprint/20108/7/jgrc20076.pdf Bauch, D. , Hölemann, J. A., Nikulina, A., Wegner, C., Janout, M. A., Timokhov, L. A. and Kassens, H. (2013) Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic). Open Access Journal of Geophysical Research: Oceans, 118 (1). pp. 550-561. DOI 10.1002/jgrc.20076 <https://doi.org/10.1002/jgrc.20076>. doi:10.1002/jgrc.20076 info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1002/jgrc.20076 2023-04-07T15:07:42Z Hydrographic and stable isotope (δ18O) data from 4 summer surveys in the Laptev Sea are used to derive fractions of sea-ice meltwater and river water. Sea-ice meltwater fractions are found to be correlated to river water fractions. While initial heat of river discharge is too small to melt the observed 0-158 km3 of sea-ice meltwater, arctic rivers contain suspended particles (SPM) and colored dissolved organic material (CDOM) that preferentially absorb solar radiation. Accordingly heat content in surface waters is correlated to river water fractions. But in years when river water is largely absent within the surface layer absolute heat content values increase to considerably higher values with extended exposure time to solar radiation and sensible heat. Nevertheless no net sea-ice melting is observed on the shelf in years when river water is largely absent within the surface layer. The total freshwater volume of the central-eastern Laptev Sea (72-76°N, 122-140°E) varies between ~1000-1500 km3 (34.92 reference salinity). It is dominated by varying river water volumes (~1300-1800 km3) reduced by an about constant freshwater deficit (~350-400 km3) related to sea-ice formation. Net sea-ice melt (~109-158 km3) is only present in years with high river water budgets. Intermediate to bottom layer (>25 salinities) contain ~60% and 30% of the river budget in years with low and high river budgets, respectively. The average mean residence time of shelf waters was ~2-3 years during 2007-2009. Article in Journal/Newspaper Arctic Arctic laptev Laptev Sea Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Laptev Sea Journal of Geophysical Research: Oceans 118 1 550 561 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Hydrographic and stable isotope (δ18O) data from 4 summer surveys in the Laptev Sea are used to derive fractions of sea-ice meltwater and river water. Sea-ice meltwater fractions are found to be correlated to river water fractions. While initial heat of river discharge is too small to melt the observed 0-158 km3 of sea-ice meltwater, arctic rivers contain suspended particles (SPM) and colored dissolved organic material (CDOM) that preferentially absorb solar radiation. Accordingly heat content in surface waters is correlated to river water fractions. But in years when river water is largely absent within the surface layer absolute heat content values increase to considerably higher values with extended exposure time to solar radiation and sensible heat. Nevertheless no net sea-ice melting is observed on the shelf in years when river water is largely absent within the surface layer. The total freshwater volume of the central-eastern Laptev Sea (72-76°N, 122-140°E) varies between ~1000-1500 km3 (34.92 reference salinity). It is dominated by varying river water volumes (~1300-1800 km3) reduced by an about constant freshwater deficit (~350-400 km3) related to sea-ice formation. Net sea-ice melt (~109-158 km3) is only present in years with high river water budgets. Intermediate to bottom layer (>25 salinities) contain ~60% and 30% of the river budget in years with low and high river budgets, respectively. The average mean residence time of shelf waters was ~2-3 years during 2007-2009. |
format |
Article in Journal/Newspaper |
author |
Bauch, Dorothea Hölemann, Jens A. Nikulina, Anna Wegner, Carolyn Janout, Markus A. Timokhov, Leonid A. Kassens, Heidemarie |
spellingShingle |
Bauch, Dorothea Hölemann, Jens A. Nikulina, Anna Wegner, Carolyn Janout, Markus A. Timokhov, Leonid A. Kassens, Heidemarie Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
author_facet |
Bauch, Dorothea Hölemann, Jens A. Nikulina, Anna Wegner, Carolyn Janout, Markus A. Timokhov, Leonid A. Kassens, Heidemarie |
author_sort |
Bauch, Dorothea |
title |
Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
title_short |
Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
title_full |
Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
title_fullStr |
Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
title_full_unstemmed |
Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic) |
title_sort |
correlation of river water and local sea-ice melting on the laptev sea shelf (siberian arctic) |
publisher |
AGU (American Geophysical Union) |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/20108/ https://oceanrep.geomar.de/id/eprint/20108/1/JGRinpress-SeaIceMeltingLS-authors-final.pdf https://oceanrep.geomar.de/id/eprint/20108/7/jgrc20076.pdf https://doi.org/10.1002/jgrc.20076 |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic Arctic laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic laptev Laptev Sea Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/20108/1/JGRinpress-SeaIceMeltingLS-authors-final.pdf https://oceanrep.geomar.de/id/eprint/20108/7/jgrc20076.pdf Bauch, D. , Hölemann, J. A., Nikulina, A., Wegner, C., Janout, M. A., Timokhov, L. A. and Kassens, H. (2013) Correlation of river water and local sea-ice melting on the Laptev Sea shelf (Siberian Arctic). Open Access Journal of Geophysical Research: Oceans, 118 (1). pp. 550-561. DOI 10.1002/jgrc.20076 <https://doi.org/10.1002/jgrc.20076>. doi:10.1002/jgrc.20076 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/jgrc.20076 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
118 |
container_issue |
1 |
container_start_page |
550 |
op_container_end_page |
561 |
_version_ |
1766301236625145856 |