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Raymond Nepstad

Research Scientist

Raymond Nepstad

Research Scientist

Raymond Nepstad
Phone: 934 01 761
Department: Environment and New Resources
Office: Trondheim

Publications and responsibilities

Publications

Publication

In situ characterisation of complex suspended particulates surrounding an active submarine tailings placement site in a Norwegian fjord

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1561514

Suspended particle measurements over flood and ebb transects of a Norwegian fjord (Frænfjorden) with an active submarine mine tailings placement are presented. Measurements focused on characterisation of spatial variability in particle and floc size, and determination of suspended mine tailing conce...

Year 2017
Type Journal publication
Publication

Effects and uptake and excretion kinetics of 11 selected PAHs in Arctic lipid rich copepods

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1547729

Increased ice cap melting is opening up new areas in the Arctic to human activities such as oil exploration. Offshore oil production releases large quantities of hydrocarbons into the marine environment, notably as produced water and oil droplets. The PWC-Arctic project endeavors to assess the poten...

Authors Salaverria-Zabalegui Iurgi Imanol Øverjordet Ida Beathe Nepstad Raymond Hansen Bjørn Henrik Nielsen Torkel Gissel Altin Dag Nordtug Trond Olsen Anders Johny
Year 2017
Type Conference lecture and academic presentation
Publication

Assessing impacts of simulated oil spills on the Northeast Arctic cod fishery

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1522946

We simulate oil spills of 1500 and 4500 m3/day lasting 14, 45, and 90 days in the spawning grounds of the commercial fish species, Northeast Arctic cod. Modeling the life history of individual fish eggs and larvae, we predict deviations from the historical pattern of recruitment to the adult populat...

Authors Carroll JoLynn Vikebø Frode Bendiksen Howell Daniel Broch Ole Jacob Nepstad Raymond Augustine Starrlight Skeie Geir Morten Bast Radovan Juselius Jonas
Year 2017
Type Journal publication
Publication

Dynamic Links between Lipid Storage, Toxicokinetics and Mortality in a Marine Copepod Exposed to Dimethylnaphthalene

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1520968

Efficiently assessing and managing the risks of pollution in the marine environment requires mechanistic models for toxic effects. The General Unified Threshold model for Survival (GUTS) provides a framework for deriving toxicokinetic-toxicodynamic (TKTD) models for the end point survival. Two recur...

Authors Jager Tjalling Øverjordet Ida Beathe Nepstad Raymond Hansen Bjørn Henrik
Year 2017
Type Journal publication
Publication

Spatiotemporal Dispersal and Deposition of Fish Farm Wastes: A Model Study from Central Norway

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1511796

A spatially explicit coupled hydrodynamic-mass transport model system was used to simulate dispersal of particulate organic matter from Atlantic salmon (Salmo salar) farming in central Norway. Model setups of 32 m horizontal resolution were run for periods of up to 650 days for 3 sites of different ...

Authors Broch Ole Jacob Daae Ragnhild Lundmark Ellingsen Ingrid H. Nepstad Raymond Bendiksen Eldar Åsgard Reed Jenny Lisa Senneset Gunnar
Year 2017
Type Journal publication
Publication

Automatic determination of heart rates from microscopy videos of early life stages of fish

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1489795

Toxic effects of organic hydrophobic contaminants include impacts on fish heart rate (HR) and cardiac functioning. Thus, in ecotoxicology as well as aquaculture and even medicine, fish heart functioning plays an important role in application areas. The aim of this study was to assemble a pipeline of...

Authors Nepstad Raymond Davies Emlyn John Altin Dag Nordtug Trond Hansen Bjørn Henrik
Year 2017
Type Journal publication
Publication

2017:00007 A - SubSea Dispersant lnjection (SSDI)- a "state of the art" and the need for further documentations

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1477952

The aim of this pre-project has been to give a "State-of the art" and describe the R&D challenges and documentation needed in order to perform robust NEBA (Net Environmental Benefit Analysis) where SubSea Dispersant Injection (SSDI) is included as an acceptable countermeasure option. In spill sc...

Authors Daling Per Snorre Brakstad Odd Gunnar Brandvik Per Johan Davies Emlyn John Grøsvik Bjørn Einar Meier Sonnich Nepstad Raymond Nordtug Trond Vikebø Frode Bendiksen
Year 2017
Type Report/thesis
Publication

Potential impacts of mine tailing plumes on pelagic filter-feeders

https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1363483

Deposition of mine tailings in fjords along the Norwegian coast is known to have ecological implications for benthic fauna, but little information is available on the potential impacts on pelagic organisms. Depending on local hydrology, deposition of tailings can result in plumes where the particle ...

Authors Hansen Bjørn Henrik Farkas Julia Altin Dag Booth Andy Davies Emlyn J. Nepstad Raymond Skancke Jørgen Nordtug Trond Olsen Anders Johny Øverjordet Ida Beathe
Year 2016
Type Conference lecture and academic presentation
View all publications at Cristin