Particulate Organic Carbon Flux to the Arctic Ocean Sea Floor

Wassmann, Paul; Bauerfeind, Eduard; Fortier, Michelle; Fukuchi, Mitsuo; Hargrave, B. T.; Moran, B.; Noji, Thomas T.; Nöthig, Eva‐Maria; Olli, Kalle; Peinert, Rolf; Sasaki, Hiroaki; Шевченко, В. П.

doi:10.1007/978-3-642-18912-8_5

Cited by 79 publications

(86 citation statements)

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“…2c) which is in contrast to other studies from seasonally ice covered regions (Hargrave et al, 2002;Honjo et al, 2000;Ingalls et al, 2006;Ramseier et al, 1997;Wassmann et al, 2004). The high river discharge by the Yenisei in June and the Ob in June to August (Fig.…”

Section: Relation Of Fluxes To Ice Cover Light Availability and Rivementioning

confidence: 56%

“…(Figs. 3a and 8) and were in the same order of magnitude as late summer/early autumn fluxes in other arctic coastal seas (Wassmann et al, 2004). Intermediate organic carbon and nitrogen percentages and organic matter quality indicate mixed planktonic and fluvial organic matter source (Figs.…”

Section: Factor Analyses Of Trap Samplesmentioning

confidence: 58%

“…so that we may have missed a small seasonal signal. Organic carbon percentages were between 2.5% and 17.6% which is a very wide range compared to other trap experiments in arctic regions (Hargrave et al, 2002;Ingalls et al, 2006;Wassmann et al, 2004). Low values ( (Table 1).…”

Section: Current Speeds and Directionsmentioning

confidence: 59%

“…Enhanced primary productivity is mainly restricted to the short ice-free period in late summer or may take place in the polynya area (Wassmann et al, 2004) which is situated in the southern Kara Sea north of the fast ice zone (Harms et al, 2000). turbidity from river suspension (Vedernikov et al, 1995;Vinogradov et al, 2000).…”

Section: Article In Pressmentioning

confidence: 99%

“…turbidity from river suspension (Vedernikov et al, 1995;Vinogradov et al, 2000). Timing of ice break up and ice drift varies interannually and is largely controlled by winds that together with seasonal river discharge make the whole Arctic a region of very patchy and variable primary production and POC export during the season of sufficient light and ice-free conditions (Wassmann et al, 2004). Vinogradov et al (2000) estimated a total primary production of 20 Â 10 6 t C a À1 for the entire Kara Sea.…”

Section: Article In Pressmentioning

confidence: 99%

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Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

Gaye

Fahl

Kodina

et al. 2007

Continental Shelf Research

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The Kara Sea is one of the arctic marginal seas strongly influenced by fresh water and river suspension. The highly seasonal discharge by the two major rivers Yenisei and Ob induces seasonal changes in hydrography, sea surface temperature, ice cover, primary production and sedimentation. In order to obtain a seasonal pattern of sedimentation in the Kara Sea, sediment traps were deployed near the river mouth of the Yenisei (Yen) as well as in the central Kara Sea (Kara) within the framework of the German-Russian project ''Siberian River run-off; SIRRO''. Two and a half years of time-series flux data were obtained between September 2000 and April 2003 and were analyzed for bulk components, amino acids, stable carbon and nitrogen isotopes as well as sterols and fatty acids.Sediment trap data show that much of the annual deposition occurred under ice cover, possibly enhanced by zooplanktonic activity and sediment resuspension. An early bloom of ice-associated algae in April/May occurred in the polynya area and may have been very important to sustain the life cycles of higher organisms after the light limitation of the winter months due to no/low insolation and ice cover. The strong river input dominated the months June-August in the southern part of the Kara Sea. The central Kara Sea had a much shorter productive period starting in August and was less affected by the river plumes. Despite different time-scales of sampling and trapping biases, total annual fluxes from traps were in the same order of magnitude as accumulation rates in surface sediments. Terrestrial organic carbon accumulation decreased from 10.7 to 0.3 g C m À2 a À1 from the riverine source to the central Kara Sea. Parallel to this, preservation of marine organic matter decreased from 10% to 2% of primary productivity which was probably related to decreasing rates of sedimentation. r

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Section: Relation Of Fluxes To Ice Cover Light Availability and Rivementioning

confidence: 56%

Section: Factor Analyses Of Trap Samplesmentioning

confidence: 58%

Section: Current Speeds and Directionsmentioning

confidence: 59%

Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

See 3 more Smart Citations

Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

Gaye

Fahl

Kodina

et al. 2007

Continental Shelf Research

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Variability in under‐ice export fluxes of biogenic matter in the Arctic Ocean

Lalande

Nöthig

Somavilla

et al. 2014

Global Biogeochemical Cycles

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A critical question regarding the organic carbon cycle in the Arctic Ocean is whether the decline in ice extent and thickness and the associated increase in solar irradiance in the upper ocean will result in increased primary production and particulate organic carbon (POC) export. To assess spatial and temporal variability in POC export, under-ice export fluxes were measured with short-term sediment traps in the northern Laptev Sea in July-August-September 1995, north of the Fram Strait in July 1997, and in the Central Arctic in August-September 2012. Sediment traps were deployed at 2-5 m and 20-25 m under ice for periods ranging from 8.5 to 71 h. In addition to POC fluxes, total particulate matter, chlorophyll a, biogenic particulate silica, phytoplankton, and zooplankton fecal pellet fluxes were measured to evaluate the amount and composition of the material exported in the upper Arctic Ocean. Whereas elevated export fluxes observed on and near the Laptev Sea shelf were likely the combined result of high primary production, resuspension, and release of particulate matter from melting ice, low export fluxes above the central basins despite increased light availability during the record minimum ice extent of 2012 suggest that POC export was limited by nutrient supply during summer. These results suggest that the ongoing decline in ice cover affects export fluxes differently on Arctic shelves and over the deep Arctic Ocean and that POC export is likely to remain low above the central basins unless additional nutrients are supplied to surface waters.

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Temporal and spatial variability of particle transport in the deep Arctic Canada Basin

et al. 2015

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To better understand the current carbon cycle and potentially detect its change in the rapidly changing Arctic Ocean, we examined sinking particles collected quasi-continuously over a period of 7 years (2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011) by bottom-tethered sediment trap moorings in the central Canada Basin. Total mass flux was very low (<100 mg m 22 d 21 ) at all sites and was temporally decoupled from the cycle of primary production in surface waters. Extremely low radiocarbon contents of particulate organic carbon and high aluminum contents in sinking particles reveal high contributions of resuspended sediment to total sinking particle flux in the deep Canada Basin. Station A (75 N, 150 W) in the southwest quadrant of the CanadaBasin is most strongly influenced while Station C (77 N, 140 W) in the northeast quadrant is least influenced by lateral particle supply based on radiocarbon content and Al concentration. The results at Station A, where three sediment traps were deployed at different depths, imply that the most likely mode of lateral particle transport was as thick clouds of enhanced particle concentration extending well above the seafloor. At present, only 1%-2% of the low levels of new production in Canada Basin surface waters reaches the interior basin. Lateral POC supply therefore appears to be the major source of organic matter to the interior basin. However, ongoing changes to surface ocean boundary conditions may influence both lateral and vertical supply of particulate material to the deep Canada Basin.

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Particulate Organic Carbon Flux to the Arctic Ocean Sea Floor

Cited by 79 publications

References 0 publications

Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

Variability in under‐ice export fluxes of biogenic matter in the Arctic Ocean

Temporal and spatial variability of particle transport in the deep Arctic Canada Basin

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