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Author |
Amon, RMW; Budéus, G; Meon, B |
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Title |
Dissolved organic carbon distribution and origin in the Nordic Seas: Exchanges with the Arctic Ocean and the North Atlantic |
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Journal Article |
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Year |
2003 |
Publication |
Journal of Geophysical Research |
Abbreviated Journal |
J Geophys Res |
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Volume |
108 |
Issue |
C7 |
Pages |
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Keywords |
dissolved organic matter; dissolved organic carbon; chromophoric dissolved organic matter; fluorescence; vertical carbon transport |
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Abstract |
Dissolved organic carbon (DOC) and in situ fluorescence were measured along with hydrographic parameters in the Greenland, Iceland, and Norwegian Seas (Nordic Seas). Surface (<100 m) concentrations of DOC ranged from 60 to 118 µM with elevated values in the East Greenland Current (EGC) which transports water from the Arctic Ocean to the North Atlantic. EGC surface waters also showed a pronounced fluorescence maximum between 30 and 120 m depth in all EGC sections indicating the abundance of Arctic river derived DOC in this current. Based on fluorescence we estimated that 20-50% of the annual river discharge to the Arctic Ocean was exported in the EGC. The fluorescence maximum was typically associated with salinity around 33 and temperatures below -1°C which are characteristic of surface and upper halocline water in the Arctic Ocean. The elevated fluorescence in this water mass suggests a strong Eurasian shelf component and also suggests that in situ fluorescence could be used to trace Eurasian shelf water in the central Arctic Ocean. DOC concentrations in the Nordic Sea basins (>1000 m) were relatively high (~50 µM DOC) compared with other ocean basins indicating active vertical transport of DOC in this region on decadal timescales. Based on existing vertical transport estimates and 15 µM of semilabile DOC we calculated an annual vertical net DOC export of 3.5 Tg C yr-1 in the Greenland Sea and about 36 Tg C yr-1 for the entire Arctic Mediterranean Sea (AMS) including the Greenland-Scotland Ridge overflow. It appears that physical processes play a determining role for the distribution of DOC in the AMS. |
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American Geophysical Union |
Place of Publication |
Washington, DC |
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English |
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English |
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Nordic Seas |
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Call Number |
refbase @ user @ ms |
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5 |
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Author |
Gerland, S; Winther, J-G; Örbæk, JB; Ivanov, BV |
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Title |
Physical properties, spectral reflectance and thickness development of first year fast ice in Kongsfjorden, Svalbard |
Type |
Book Chapter |
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Year |
1999 |
Publication |
Proceedings of the International Symposium on Polar Aspects of Global Change |
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Volume |
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Issue |
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Pages |
275-282 |
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Keywords |
Fast ice; Ice properties; Reflectance; Ice thickness; Physical properties; PNE, Norway, Svalbard, Kongsfjorden |
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Abstract |
A ground truth study was performed on first year fast ice in Kongsfjorden, Svalbard, during spring 1997 and 1998. The survey included sea ice thickness monitoring as well as observation of surface albedo, attenuation of optical radiation in the ice, physical properties and texture of snow and sea ice. The average total sea ice thickness in May was about 0.9 m, including a 0.2 m thick snow layer on top. Within a few weeks in both years, the snow melted almost completely, whereas the ice thickness decreased by not more than 0.05 m. During spring, the lower part of the snow refroze into a solid layer. The sea ice became more porous. Temperatures in the sea ice increased and the measurable salinity of the sea ice decreased with time. Due to snow cover thinning and snow grain growth, maximum surface albedo decreased from 0.96 to 0.74. Texture analysis on cores showed columnar ice with large crystals (max. crystal length > 0.1 m) below a 0.11 m thick mixed surface layer of granular ice with smaller crystals. In both years, we observed sea ice algae at the bottom part of the ice. This layer has a significant effect on the radiation transmissivity. |
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Norwegian Polar Institute, Polar Environmental Centre, N-9296 Tromsoe, Norway |
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Norsk Polarinstitutt |
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English |
Summary Language |
English |
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Series Title |
Polar Research |
Abbreviated Series Title |
Polar Res |
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Series Volume |
18 |
Series Issue |
2 |
Edition |
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ISSN |
0800-0395 |
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International Symposium on Polar Aspects of Global Change, Tromso (Norway), 24-28 Aug 1998 |
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no |
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Call Number |
refbase @ user @ 726 |
Serial |
6 |
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Author |
Lohrmann, A; Cabrera, R; Kraus, NC |
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Title |
Acoustic-doppler velocimeter (ADV) for laboratory use |
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Journal Article |
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Year |
1994 |
Publication |
Fundamentals and advancements in hydraulic measurements and experimentation. Proceedings, Hydraulic Division/ASCE, August 1994 |
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Pages |
351-365 |
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Keywords |
methods; flow; flume |
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English |
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Symposium on fundamentals and advancements in hydraulic measurements and experimentation |
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no |
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Call Number |
refbase @ user @ |
Serial |
8 |
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Author |
de Castellvi, J (ed) |
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Title |
Actas des tercer symposium espanol de estudios Antarcticos. Gredos, 3 al 5 de octubre de 1989 |
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Book Whole |
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Year |
1990 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
379 pp |
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Comision interministerial de Cienctia y Technologia |
Place of Publication |
Madrid |
Editor |
de Castellvi, J |
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Language |
Spanish |
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no |
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Call Number |
refbase @ user @ library-32/19/20 |
Serial |
9 |
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Author |
Hobson, KA; Ambrose Jr, WG; Renaud, PE |
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Title |
Sources of primary production, benthic-pelagic coupling, and trophic relationships within the Northeast Water Polynya: insights from δ13C and δ15N analysis |
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Journal Article |
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Year |
1995 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
Mar Ecol Prog Ser |
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Volume |
128 |
Issue |
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Pages |
1-10 |
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Keywords |
ARK; Greenland; NEW; Polynya; Isotopes; 13C; 15N; Benthos; Food |
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Inter-Research |
Place of Publication |
Oldendorf/Luhe |
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Language |
English |
Summary Language |
English |
Original Title |
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Series Editor |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0171-8630 |
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no |
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Call Number |
refbase @ user @ NEW Zonation(96) |
Serial |
10 |
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