The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice. / Norman, Louiza; Thomas, David N.; Stedmon, Colin A.; Granskog, Mats A.; Papadimitriou, Stathys; Krapp, Rupert H.; Meiners, Klaus M.; Lannuzel, Delphine; van der Merwe, Pier; Dieckmann, Gerhard S.

In: Deep-Sea Research Part II, Vol. 58, No. 9-10, 2011, p. 1075-1091.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Harvard

Norman, L, Thomas, DN, Stedmon, CA, Granskog, MA, Papadimitriou, S, Krapp, RH, Meiners, KM, Lannuzel, D, van der Merwe, P & Dieckmann, GS 2011, 'The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice' Deep-Sea Research Part II, vol 58, no. 9-10, pp. 1075-1091., 10.1016/j.dsr2.2010.10.030

APA

Norman, L., Thomas, D. N., Stedmon, C. A., Granskog, M. A., Papadimitriou, S., Krapp, R. H., ... Dieckmann, G. S. (2011). The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice. Deep-Sea Research Part II, 58(9-10), 1075-1091. 10.1016/j.dsr2.2010.10.030

CBE

Norman L, Thomas DN, Stedmon CA, Granskog MA, Papadimitriou S, Krapp RH, Meiners KM, Lannuzel D, van der Merwe P, Dieckmann GS. 2011. The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice. Deep-Sea Research Part II. 58(9-10):1075-1091. Available from: 10.1016/j.dsr2.2010.10.030

MLA

Vancouver

Author

Norman, Louiza; Thomas, David N.; Stedmon, Colin A.; Granskog, Mats A.; Papadimitriou, Stathys; Krapp, Rupert H.; Meiners, Klaus M.; Lannuzel, Delphine; van der Merwe, Pier; Dieckmann, Gerhard S. / The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice.

In: Deep-Sea Research Part II, Vol. 58, No. 9-10, 2011, p. 1075-1091.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{eeba289385ac416ca1db8eda5259175a,
title = "The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice",
publisher = "Pergamon",
author = "Louiza Norman and Thomas, {David N.} and Stedmon, {Colin A.} and Granskog, {Mats A.} and Stathys Papadimitriou and Krapp, {Rupert H.} and Meiners, {Klaus M.} and Delphine Lannuzel and {van der Merwe}, Pier and Dieckmann, {Gerhard S.}",
year = "2011",
doi = "10.1016/j.dsr2.2010.10.030",
volume = "58",
number = "9-10",
pages = "1075--1091",
journal = "Deep-Sea Research Part II",
issn = "0967-0645",

}

RIS

TY - JOUR

T1 - The characteristics of dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) in Antarctic sea ice

A1 - Norman,Louiza

A1 - Thomas,David N.

A1 - Stedmon,Colin A.

A1 - Granskog,Mats A.

A1 - Papadimitriou,Stathys

A1 - Krapp,Rupert H.

A1 - Meiners,Klaus M.

A1 - Lannuzel,Delphine

A1 - van der Merwe,Pier

A1 - Dieckmann,Gerhard S.

AU - Norman,Louiza

AU - Thomas,David N.

AU - Stedmon,Colin A.

AU - Granskog,Mats A.

AU - Papadimitriou,Stathys

AU - Krapp,Rupert H.

AU - Meiners,Klaus M.

AU - Lannuzel,Delphine

AU - van der Merwe,Pier

AU - Dieckmann,Gerhard S.

PB - Pergamon

PY - 2011

Y1 - 2011

N2 - An investigation of coloured dissolved organic matter (CDOM) and its relationships to physical and biogeochemical parameters in Antarctic sea ice and oceanic water have indicated that ice melt may both alter the spectral characteristics of CDOM in Antarctic surface waters and serve as a likely source of fresh autochthonous CDOM and labile DOC. Samples were collected from melted bulk sea ice, sea ice brines, surface gap layer waters, and seawater during three expeditions: one during the spring to summer and two during the winter to spring transition period. Variability in both physical (temperature and salinity) and biogeochemical parameters (dissolved and particulate organic carbon and nitrogen, as well as chlorophyll a) was observed during and between studies, but CDOM absorption coefficients measured at 375nm (a375) did not differ significantly. Distinct peaked absorption spectra were consistently observed for bulk ice, brine, and gap water, but were absent in the seawater samples. Correlation with the measured physical and biogeochemical parameters could not resolve the source of these peaks, but the shoulders and peaks observed between 260 and 280nm and between 320 to 330nm respectively, particularly in the samples taken from high light-exposed gap layer environment, suggest a possible link to aromatic and mycosporine-like amino acids. Sea ice CDOM susceptibility to photo-bleaching was demonstrated in an in situ 120 hour exposure, during which we observed a loss in CDOM absorption of 53% at 280nm, 58% at 330nm, and 30% at 375nm. No overall coincidental loss of DOC or DON was measured during the experimental period. A relationship between the spectral slope (S) and carbon-specific absorption (a⁎375) indicated that the characteristics of CDOM can be described by the mixing of two broad end-members; and aged material, present in brine and seawater samples characterised by high S values and low a⁎375; and a fresh material, due to elevated in situ production, present in the bulk ice samples characterised by low S and high a⁎375. The DOC data reported here have been used to estimate that approximately 8TgCyr−1 (∼11% of annual sea ice algae primary production) may be exported to the surface ocean during seasonal sea ice melt in the form of DOC.

AB - An investigation of coloured dissolved organic matter (CDOM) and its relationships to physical and biogeochemical parameters in Antarctic sea ice and oceanic water have indicated that ice melt may both alter the spectral characteristics of CDOM in Antarctic surface waters and serve as a likely source of fresh autochthonous CDOM and labile DOC. Samples were collected from melted bulk sea ice, sea ice brines, surface gap layer waters, and seawater during three expeditions: one during the spring to summer and two during the winter to spring transition period. Variability in both physical (temperature and salinity) and biogeochemical parameters (dissolved and particulate organic carbon and nitrogen, as well as chlorophyll a) was observed during and between studies, but CDOM absorption coefficients measured at 375nm (a375) did not differ significantly. Distinct peaked absorption spectra were consistently observed for bulk ice, brine, and gap water, but were absent in the seawater samples. Correlation with the measured physical and biogeochemical parameters could not resolve the source of these peaks, but the shoulders and peaks observed between 260 and 280nm and between 320 to 330nm respectively, particularly in the samples taken from high light-exposed gap layer environment, suggest a possible link to aromatic and mycosporine-like amino acids. Sea ice CDOM susceptibility to photo-bleaching was demonstrated in an in situ 120 hour exposure, during which we observed a loss in CDOM absorption of 53% at 280nm, 58% at 330nm, and 30% at 375nm. No overall coincidental loss of DOC or DON was measured during the experimental period. A relationship between the spectral slope (S) and carbon-specific absorption (a⁎375) indicated that the characteristics of CDOM can be described by the mixing of two broad end-members; and aged material, present in brine and seawater samples characterised by high S values and low a⁎375; and a fresh material, due to elevated in situ production, present in the bulk ice samples characterised by low S and high a⁎375. The DOC data reported here have been used to estimate that approximately 8TgCyr−1 (∼11% of annual sea ice algae primary production) may be exported to the surface ocean during seasonal sea ice melt in the form of DOC.

U2 - 10.1016/j.dsr2.2010.10.030

DO - 10.1016/j.dsr2.2010.10.030

JO - Deep-Sea Research Part II

JF - Deep-Sea Research Part II

SN - 0967-0645

IS - 9-10

VL - 58

SP - 1075

EP - 1091

ER -