Blar i NIVA Open Access Archive på forfatter "Wallhead, Philip"
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A 1-Dimensional Sympagic–Pelagic–Benthic Transport Model (SPBM): Coupled Simulation of Ice, Water Column, and Sediment Biogeochemistry, Suitable for Arctic Applications
Yakubov, Shamil; Wallhead, Philip; Protsenko, Elizaveta; Yakushev, Evgeniy; Pakhomova, Svetlana; Brix, Holger (Journal article; Peer reviewed, 2019)Marine biogeochemical processes can strongly interact with processes occurring in adjacent ice and sediments. This is especially likely in areas with shallow water and frequent ice cover, both of which are common in the ... -
Arctic Sensitivity? Suitable Habitat for Benthic Taxa Is Surprisingly Robust to Climate Change
Renaud, Paul Eric; Wallhead, Philip; Kotta, Jonne; Wlodarska-Kowalczuk, Maria; Bellerby, Richard; Ratsep, Merli; Slagstad, Dag; Kuklinski, Piotr (Journal article; Peer reviewed, 2019)Arctic marine ecosystems are often assumed to be highly vulnerable to ongoing climate change, and are expected to undergo significant shifts in structure and function. Community shifts in benthic fauna are likely to result ... -
Bottom RedOx Model (BROM v.1.1): a coupled benthic–pelagic model for simulation of water and sediment biogeochemistry
Yakushev, Evgeny; Protsenko, Elizaveta; Bruggeman, Jorn; Wallhead, Philip; Pakhomova, Svetlana V.; Yakubov, Shamil Kh.; Bellerby, Richard; Couture, Raoul-Marie (Journal article; Peer reviewed, 2017)Interactions between seawater and benthic systems play an important role in global biogeochemical cycling. Benthic fluxes of some chemical elements (e.g., C, N, P, O, Si, Fe, Mn, S) alter the redox state and marine carbonate ... -
Bottom water acidification and warming on the western Eurasian Arctic shelves: Dynamical downscaling projections
Wallhead, Philip; Bellerby, Richard; Silyakova, Anna; Slagstad, Dag; Polukhin, Alexander A. (Journal article; Peer reviewed, 2017)The impacts of oceanic CO2 uptake and global warming on the surface ocean environment have received substantial attention, but few studies have focused on shelf bottom water, despite its importance as habitat for benthic ... -
Ecosystem service benefits and costs of deep-sea ecosystem restoration
Chen, Wenting; Wallhead, Philip; Hynes, Stephen; Groeneveld, Rolf; O'Connor, Eamonn; Gambi, Cristina; Danovaro, Roberto; Tinch, Rob; Nadia, Papadopoulou; Smith, Chris (Peer reviewed; Journal article, 2022)Deep-sea ecosystems are facing degradation which could have severe consequences for biodiversity and the livelihoods of coastal populations. Ecosystem restoration as a natural based solution has been regarded as a useful ... -
Potential effects of reduced riverine inorganic particle loading on water quality in the Oslofjord region
Wallhead, Philip; Kristiansen, Trond; Frigstad, Helene; Sørensen, Kai; Marty, Sabine (NIVA-rapport;7611, Research report, 2021)A model investigation was carried out of the potential impacts of reduced riverine inorganic particle loading in the Oslofjord region. Some significant improvements in water clarity, particularly in the Glomma estuary, ... -
The Quantitative Analysis of Water Mass during Winter on the East China Sea Shelf Using an Extended OMP Analysis
Li, Xiaoshuang; Wallhead, Philip; Bellerby, Richard; Liu, Jing; Yang, Anqiang (Peer reviewed; Journal article, 2022)The distribution and quantification of water masses on the East China Sea (ECS) shelf is important for identifying and understanding historical climate-driven changes in ocean properties and circulation in the region. We ... -
Retrieving monthly and interannual total-scale pH (pHT) on the East China Sea shelf using an artificial neural network: ANN-pHT-v1
Li, Xiaoshuang; Bellerby, Richard Garth James; Ge, Jianzhong; Wallhead, Philip; Liu, Jing; Yang, Anqiang (Peer reviewed; Journal article, 2020)While our understanding of pH dynamics has strongly progressed for open-ocean regions, for marginal seas such as the East China Sea (ECS) shelf progress has been constrained by limited observations and complex interactions ... -
Reviews and syntheses: parameter identification in marine planktonic ecosystem modelling
Schartau, Markus; Wallhead, Philip; Hemmings, John; Loptien, Ulrike; Kriest, Iris; Krishna, Shubham; Ward, Ben A.; Slawig, Thomas; Oschlies, Andreas (Journal article; Peer reviewed, 2017)To describe the underlying processes involved in oceanic plankton dynamics is crucial for the determination of energy and mass flux through an ecosystem and for the estimation of biogeochemical element cycling. Many ... -
The sensitivity of primary productivity in Disko Bay, a coastal Arctic ecosystem, to changes in freshwater discharge and sea ice cover
Møller, Eva Friis; Christensen, Asbjørn; Larsen, Janus; Mankoff, Kenneth D.; Hvid Ribergaard, Mads; Sejr, Mikael; Wallhead, Philip; Maar, Marie (Peer reviewed; Journal article, 2023)The Greenland ice sheet is melting, and the rate of ice loss has increased 6-fold since the 1980s. At the same time, the Arctic sea ice extent is decreasing. Meltwater runoff and sea ice reduction both influence light and ... -
Understanding the Biogeochemical Impacts of Fish Farms Using a Benthic-Pelagic Model
Yakushev, Evgeniy; Wallhead, Philip; Renaud, Paul Eric; Ilinskaya, Alisa; Protsenko, Elizaveta; Yakubov, Shamil; Pakhomova, Svetlana; Sweetman, Andrew K; Dunlop, Kathy; Berezina, Anfisa; Bellerby, Richard; Dale, Trine (Peer reviewed; Journal article, 2020)Sustainable development of the salmon farming industry requires knowledge of the biogeochemical impacts of fish farm emissions. To investigate the spatial and temporal scales of farm impacts on the water column and benthic ... -
Why do regional biogeochemical models produce contrasting future projections of primary production in the Barents Sea?
Mousing, Erik Askov; Ellingsen, Ingrid Helene; Hjøllo, Solfrid Sætre; Husson, Berengere; Skogen, Morten D.; Wallhead, Philip (Peer reviewed; Journal article, 2023)Projected future changes in primary production in the Barents Sea vary among different regional biogeochemical models, with some showing an increase, some a decrease, and some no change. This variability has been attributed ...