Fate of colloids during estuarine mixing in the Arctic
The estuarine behavior of organic carbon (OC) and trace elements (TE) was studied for the largest European sub-Arctic river, which is the Severnaya Dvina; this river has a deltaic estuary covered in ice during several hydrological seasons: summer (July 2010, 2012) and winter (March 2009) baseflow, a...
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ftdoajarticles:oai:doaj.org/article:47a510fa14ef444a87738dc9c36ea4b1 2023-05-15T15:01:52+02:00 Fate of colloids during estuarine mixing in the Arctic O. S. Pokrovsky L. S. Shirokova J. Viers V. V. Gordeev V. P. Shevchenko A. V. Chupakov T. Y. Vorobieva F. Candaudap C. Causserand A. Lanzanova C. Zouiten 2014-02-01T00:00:00Z https://doi.org/10.5194/os-10-107-2014 https://doaj.org/article/47a510fa14ef444a87738dc9c36ea4b1 EN eng Copernicus Publications http://www.ocean-sci.net/10/107/2014/os-10-107-2014.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 doi:10.5194/os-10-107-2014 https://doaj.org/article/47a510fa14ef444a87738dc9c36ea4b1 Ocean Science, Vol 10, Iss 1, Pp 107-125 (2014) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2014 ftdoajarticles https://doi.org/10.5194/os-10-107-2014 2022-12-30T22:20:45Z The estuarine behavior of organic carbon (OC) and trace elements (TE) was studied for the largest European sub-Arctic river, which is the Severnaya Dvina; this river has a deltaic estuary covered in ice during several hydrological seasons: summer (July 2010, 2012) and winter (March 2009) baseflow, and the November–December 2011 ice-free period. Colloidal forms of OC and TE were assessed for three pore size cutoffs (1, 10, and 50 kDa) using an in situ dialysis procedure. Conventionally dissolved (< 0.22 μm) fractions demonstrated clear conservative behavior for Li, B, Na, Mg, K, Ca, Sr, Mo, Rb, Cs, and U during the mixing of freshwater with the White Sea; a significant (up to a factor of 10) concentration increase occurs with increases in salinity. Si and OC also displayed conservative behavior but with a pronounced decrease in concentration seawards. Rather conservative behavior, but with much smaller changes in concentration (variation within ±30%) over a full range of salinities, was observed for Ti, Ni, Cr, As, Co, Cu, Ga, Y, and heavy REE. Strong non-conservative behavior with coagulation/removal at low salinities (< 5‰) was exhibited by Fe, Al, Zr, Hf, and light REE. Finally, certain divalent metals exhibited non-conservative behavior with a concentration gain at low (~ 2–5‰, Ba, Mn) or intermediate (~ 10–15‰, Ba, Zn, Pb, Cd) salinities, which is most likely linked to TE desorption from suspended matter or sediment outflux. The most important result of this study is the elucidation of the behavior of the "truly" dissolved low molecular weight LMW < 1 kDa fraction containing Fe, OC, and a number of insoluble elements. The concentration of the LMW fraction either remains constant or increases its relative contribution to the overall dissolved (< 0.22 μm) pool as the salinity increases. Similarly, the relative proportion of colloidal (1 kDa–0.22 μm) pool for the OC and insoluble TE bound to ferric colloids systematically decreased seaward, with the largest decrease occurring at low (< 5‰) ... Article in Journal/Newspaper Arctic dvina White Sea Directory of Open Access Journals: DOAJ Articles Arctic Severnaya Dvina ENVELOPE(40.494,40.494,64.532,64.532) White Sea Ocean Science 10 1 107 125 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 O. S. Pokrovsky L. S. Shirokova J. Viers V. V. Gordeev V. P. Shevchenko A. V. Chupakov T. Y. Vorobieva F. Candaudap C. Causserand A. Lanzanova C. Zouiten Fate of colloids during estuarine mixing in the Arctic |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
The estuarine behavior of organic carbon (OC) and trace elements (TE) was studied for the largest European sub-Arctic river, which is the Severnaya Dvina; this river has a deltaic estuary covered in ice during several hydrological seasons: summer (July 2010, 2012) and winter (March 2009) baseflow, and the November–December 2011 ice-free period. Colloidal forms of OC and TE were assessed for three pore size cutoffs (1, 10, and 50 kDa) using an in situ dialysis procedure. Conventionally dissolved (< 0.22 μm) fractions demonstrated clear conservative behavior for Li, B, Na, Mg, K, Ca, Sr, Mo, Rb, Cs, and U during the mixing of freshwater with the White Sea; a significant (up to a factor of 10) concentration increase occurs with increases in salinity. Si and OC also displayed conservative behavior but with a pronounced decrease in concentration seawards. Rather conservative behavior, but with much smaller changes in concentration (variation within ±30%) over a full range of salinities, was observed for Ti, Ni, Cr, As, Co, Cu, Ga, Y, and heavy REE. Strong non-conservative behavior with coagulation/removal at low salinities (< 5‰) was exhibited by Fe, Al, Zr, Hf, and light REE. Finally, certain divalent metals exhibited non-conservative behavior with a concentration gain at low (~ 2–5‰, Ba, Mn) or intermediate (~ 10–15‰, Ba, Zn, Pb, Cd) salinities, which is most likely linked to TE desorption from suspended matter or sediment outflux. The most important result of this study is the elucidation of the behavior of the "truly" dissolved low molecular weight LMW < 1 kDa fraction containing Fe, OC, and a number of insoluble elements. The concentration of the LMW fraction either remains constant or increases its relative contribution to the overall dissolved (< 0.22 μm) pool as the salinity increases. Similarly, the relative proportion of colloidal (1 kDa–0.22 μm) pool for the OC and insoluble TE bound to ferric colloids systematically decreased seaward, with the largest decrease occurring at low (< 5‰) ... |
format |
Article in Journal/Newspaper |
author |
O. S. Pokrovsky L. S. Shirokova J. Viers V. V. Gordeev V. P. Shevchenko A. V. Chupakov T. Y. Vorobieva F. Candaudap C. Causserand A. Lanzanova C. Zouiten |
author_facet |
O. S. Pokrovsky L. S. Shirokova J. Viers V. V. Gordeev V. P. Shevchenko A. V. Chupakov T. Y. Vorobieva F. Candaudap C. Causserand A. Lanzanova C. Zouiten |
author_sort |
O. S. Pokrovsky |
title |
Fate of colloids during estuarine mixing in the Arctic |
title_short |
Fate of colloids during estuarine mixing in the Arctic |
title_full |
Fate of colloids during estuarine mixing in the Arctic |
title_fullStr |
Fate of colloids during estuarine mixing in the Arctic |
title_full_unstemmed |
Fate of colloids during estuarine mixing in the Arctic |
title_sort |
fate of colloids during estuarine mixing in the arctic |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/os-10-107-2014 https://doaj.org/article/47a510fa14ef444a87738dc9c36ea4b1 |
long_lat |
ENVELOPE(40.494,40.494,64.532,64.532) |
geographic |
Arctic Severnaya Dvina White Sea |
geographic_facet |
Arctic Severnaya Dvina White Sea |
genre |
Arctic dvina White Sea |
genre_facet |
Arctic dvina White Sea |
op_source |
Ocean Science, Vol 10, Iss 1, Pp 107-125 (2014) |
op_relation |
http://www.ocean-sci.net/10/107/2014/os-10-107-2014.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 doi:10.5194/os-10-107-2014 https://doaj.org/article/47a510fa14ef444a87738dc9c36ea4b1 |
op_doi |
https://doi.org/10.5194/os-10-107-2014 |
container_title |
Ocean Science |
container_volume |
10 |
container_issue |
1 |
container_start_page |
107 |
op_container_end_page |
125 |
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1766333872726867968 |