Lithogenic and biogenic daily and annual particle fluxes on the Lomonosov Ridge of trap LOMO-2, supplement to: Fahl, Kirsten; Nöthig, Eva-Maria (2007): Lithogenic and biogenic particle fluxes on the Lomonosov Ridge (central Arctic Ocean) and their relevance for sediment accumulation: Vertical vs. lateral transport. Deep Sea Research Part I: Oceanographic Research Papers, 54(8), 1256-1272

DOI

Investigations of lithogenic and biogenic particle fluxes using long-term sediment traps are still very rare in the northern high latitudes and restricted to the arctic marginal seas and sub-arctic regions. Here, for the first time, data on the variability of fluxes of lithogenic matter, carbonate, opal, and organic carbon as well as biomarker composition from the central Arctic Ocean are presented for a one-year period. The study has been carried out on material obtained from a long-term mooring system equipped with two multi-sampling-traps (150 and 1550 m water depth) and deployed on the southern Lomonosov Ridge close to the Laptev Sea continental margin from September 1995 to August 1996. In addition, data from surface-sediments were included in the study to get more information about the flux and sedimentation of organic carbon in this area.Annual fluxes of lithogenic matter, carbonate, opal, and particulate organic carbon are 3.9 g/m2/y, 0.8 g/m2/y, 2.6 g/m2/y, 1.5 g/m2/y, respectively, at the shallow trap and 11.3 g/m2/y, 0.5 g/m2/y, 2.9 g/m2/y, 1.05 g/m2/y, respectively, at the deep trap.Both the shallow as well as the deep trap show significant differences in vertical flux values over the year. Higher values were found from mid-July to end of October (total flux of 75-130 mg/m2/d in the shallow trap and 40-225 mg/m2/d in the deep trap, respectively). During all other months, fluxes were fairly low in both traps (most total flux values <10 mg/m**2/d1). The interval of increased fluxes can be separated into (1) a mid-July/August maximum caused by increased primary production as documented in high abundances of marine biomarkers and diatoms, and (2) a September/October (absolute) maximum caused by increased influence of Lena river discharge indicated by maximum lithogenic flux and high portions of terrigenous/fluvial biomarkers in both traps. Here, total fluxes in the deep trap were significantly higher than in the shallow trap, suggesting a lateral sediment flux at greater depth.The lithogenic flux data also support the importance of sediment input from the Laptev Sea for the sediment accumulation on the Lomonosov Ridge on geological time scales, as indicated in sedimentary records from this region.

Identifier
DOI https://doi.org/10.1594/PANGAEA.602289
Related Identifier https://doi.org/10.1016/j.dsr.2007.04.014
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.602289
Provenance
Creator Fahl, Kirsten; Nöthig, Eva-Maria
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2007
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (138.920 LON, 81.072 LAT); Arctic Ocean
Temporal Coverage Begin 1995-09-15T00:00:00Z
Temporal Coverage End 1996-12-14T00:00:00Z