onr:"swepub:oai:DiVA.org:ltu-3606"
Search: onr:"swepub:oai:DiVA.org:ltu-3606" > Fractionation of ir...
- 1 of 1
- Previous record
- Next record
- To hitlist
- Gelting, Johan (author)
Fractionation of iron species and iron isotopes in the Baltic Sea euphotic zone
- Article/chapterEnglish2010
Publisher, publication year, extent ...
- 2010-08-23
- Copernicus GmbH,2010
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:ltu-3606
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-3606URI
- https://doi.org/10.5194/bg-7-2489-2010DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- Validerad; 2010; 20101102 (jgn)
- To indentify sources and transport mechanisms of iron in a coastal marine environment, we conducted measurements of the physiochemical speciation of Fe in the euphotic zone at three different locations in the Baltic Sea. In addition to sampling across a salinity gradient, we conducted this study over the spring and summer season. Moving from the riverine input characterized low salinity Bothnian Sea, via the Landsort Deep near Stockholm, towards the Gotland Deep in the Baltic Proper, total Fe concentrations averaged 114, 44, and 15 nM, respectively. At all three locations, a decrease in total Fe of 80-90% from early spring to summer was observed. Particulate Fe (PFe) was the dominating phase at all stations and accounted for 75-85% of the total Fe pool on average. The Fe isotope composition (δ 56Fe) of the PFe showed constant positive values in the Bothnian Sea surface waters (+0.08 to +0.20‰). Enrichment of heavy Fe in the Bothnian Sea PFe is possibly associated to input of aggregated land derived Fe-oxyhydroxides and oxidation of dissolved Fe(II). At the Landsort Deep the isotopic fractionation of PFe changed between -0.08‰ to +0.28‰ over the sampling period. The negative values in early spring indicate transport of PFe from the oxic-anoxic boundary at ∼80 m depth. The average colloidal iron fraction (CFe) showed decreasing concentrations along the salinity gradient; Bothnian Sea 15 nM; Landsort Deep 1 nM, and Gotland Deep 0.5 nM. Field Flow Fractionation data indicate that the main colloidal carrier phase for Fe in the Baltic Sea is a carbon-rich fulvic acid associated compound, likely of riverine origin. A strong positive correlation between PFe and chl-a indicates that cycling of suspended Fe is at least partially controlled by primary production. However, this relationship may not be dominated by active uptake of Fe into phytoplankton, but instead may reflect scavenging and removal of PFe during phytoplankton sedimentation.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Geokemi hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Geochemistry hsv//eng
- Applied Geology
- Tillämpad geologi
Added entries (persons, corporate bodies, meetings, titles ...)
- Breitbarth, Eike (author)
- Stolpe, B.University of Gothenburg (author)
- Hassellöv, M.University of Gothenburg (author)
- Ingri, JohanLuleå tekniska universitet,Geovetenskap och miljöteknik(Swepub:ltu)join (author)
- University of GothenburgGeovetenskap och miljöteknik (creator_code:org_t)
Related titles
- In:Biogeosciences: Copernicus GmbH7:8, s. 2489-25081726-41701726-4189
Internet link
Find in a library
- Biogeosciences (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Gelting, Johan
- Breitbarth, Eike
- Stolpe, B.
- Hassellöv, M.
- Ingri, Johan
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- and Geochemistry
- Articles in the publication
- Biogeosciences
- By the university
- Luleå University of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
