Seasonal variation in vertical flux of biogenic matter in the marginal ice zone and the central Barents Sea

Olli, Kalle; Riser, Christian Wexels; Wassmann, Paul; Ratkova, Tatjana; Арашкевич, Е. Г.; Pasternak, A. F.

doi:10.1016/s0924-7963(02)00177-x

Cited by 135 publications

(95 citation statements)

References 43 publications

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“…TPM was generally higher for the ice-covered station than for the open-water station for all congeners and POC contents, in accordance with higher productivity and sedimentation is in icecovered than in open-water areas (e.g. Olli et al, 2002).…”

Section: Bioaccumulation Factors and Equilibriumsupporting

confidence: 52%

“…Mean value of one measurement from an ice-covered and one from an open-water station. (B) Total particulate matter (TPM) calculated from particulate organic carbon (POC) concentrations from Olli et al (2002), assuming that 10% of TPM is POC (Reigstad, 2000). Values for May are used, but March and June are shown to illustrate the variation depending on pre-bloom, bloom, or post-bloom situation.…”

Section: Total Particulate Matter Concentrationmentioning

confidence: 99%

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Comparing measured and predicted PCB concentrations in Arctic seawater and marine biota

Borgå

Guardo

2005

Science of The Total Environment

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When a mechanistic food web model was parameterized for the Arctic marine ecosystem, it predicted PCB concentrations in zooplankton and fish that were two orders of magnitude lower than measured. PCB concentrations measured in zooplankton and fish were within the laboratory's accredited quality assured criteria, and were comparable to other Arctic regions. Although on a different scale, the predicted and measured PCB concentrations were highly correlated. As sensitivity analyses indicated water concentrations as the most sensitive parameter for the model output, dissolved water concentrations were predicted using measured zooplankton and air PCB concentrations, and empirical and mechanistic models. The food web model and the empirical relationship between bioaccumulation factor and octanol-water partitioning coefficient predicted mean dissolved water concentrations of 28 and 29 pg/L P PCB 6 (PCB-28, -52, -105, -118, -138, -153), respectively. Mean dissolved water concentration predicted from measured air concentrations in 1996 was 7.6 pg/L P PCB 5 (PCB-28 was not analysed). Mean dissolved water concentration measured in Barents Sea water sampled simultaneously as the biota in 1999 was 0.3 pg/L P PCB 6 . The dissolved water concentrations predicted from zooplankton PCB concentrations were comparable to water concentrations measured in 1996, whereas the dissolved water concentrations measured in 1999 were comparable to measurements from 2001. If the present high empirically derived bioaccumulation factors (log BAF 7.3-9.0) were realistic, this suggests that bioaccumulation in Arctic zooplankton is more efficient that previously assumed. The present study illustrates and discusses some of the difficulties encountered when different approaches to study environmental distribution of contaminants are compared. D

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Section: Bioaccumulation Factors and Equilibriumsupporting

confidence: 52%

Section: Total Particulate Matter Concentrationmentioning

confidence: 99%

Comparing measured and predicted PCB concentrations in Arctic seawater and marine biota

Borgå

Guardo

2005

Science of The Total Environment

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“…Grazing by zooplankton can strongly impact downward Xuxes of POM produced in the surface layer of the water column (Olli et al 2002;Wexels Riser et al 2008). A higher degradation of fresh algal biomass is expected to increase the relative amount of chlorophyll degradation products (Welschmeyer 1985), which can be detected in the sediment by a change in the chl a:phaeo ratio.…”

Section: Discussionmentioning

confidence: 99%

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

2010

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“…The nutrient balance dynamics might also be a controlling factor as the freshwater-driven enhancement of stratification comes to prevail over the nutrient supply from deep waters (Olli et al 2002;Hansen et al 2003). Reduction of ice cover also entails the problem of vertical turbulent mixing, in pelagic tracts of the Arctic 25…”

Section: Arctic Marine Ecosystemsmentioning

confidence: 99%

Towards the Marine Arctic Component of the Pan-Eurasian Experiment

Vihma

Uotila

Sandven³

et al. 2018

Preprint

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Abstract. The Arctic marine climate system is changing rapidly, seen as warming of the ocean and atmosphere, decline of sea ice cover, increase in river discharge, acidification of the ocean, and changes in marine ecosystems. Socio-economic activities 20 in the coastal and marine Arctic are simultaneously changing. This calls for establishment of a marine Arctic component of the Pan-Eurasian Experiment (MA-PEEX). There is a need for more in-situ observations on the marine atmosphere, sea ice, and ocean, but increasing the amount of such observations is a pronounced technological and logistical challenge. The SMEAR (Station Measuring Ecosystem-Atmosphere Relations) concept can be applied in coastal and archipelago stations, but in the Arctic Ocean it will probably be more cost-effective to further develop a strongly distributed marine observation network 25 based on autonomous buoys, moorings, Autonomous Underwater Vehicles (AUV), and Unmanned Aerial Vehicles (UAV).These have to be supported by research vessel and aircraft campaigns, as well as various coastal observations, including community-based ones. Major manned drifting stations may occasionally serve comparable to terrestrial SMEAR Flagship stations. To best utilize the observations, atmosphere-ocean reanalyses need to be further developed. To well integrate MA-PEEX with the existing terrestrial/atmospheric PEEX, focus is needed on the river discharge and associated fluxes, coastal 30 processes, as well as atmospheric transports in and out of the marine Arctic. More observations and research are also needed on the specific socio-economic challenges and opportunities in the marine and coastal Arctic, and on their interaction with changes in the climate and environmental system. MA-PEEX will promote international collaboration, sustainable marine Atmos. Chem. Phys. Discuss., https://doi

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Seasonal variation in vertical flux of biogenic matter in the marginal ice zone and the central Barents Sea

Cited by 135 publications

References 43 publications

Comparing measured and predicted PCB concentrations in Arctic seawater and marine biota

Comparing measured and predicted PCB concentrations in Arctic seawater and marine biota

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

Towards the Marine Arctic Component of the Pan-Eurasian Experiment

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