• Arctic Ocean CO2 uptake: An improved multiyear estimate of the air-sea CO2 flux incorporating chlorophyll a concentrations 

      Yasunaka, Sayaka; Siswanto, Eko; Olsen, Are; Hoppema, Mario; Watanabe, Eiji; Fransson, Agneta Ingrid; Chierici, Melissa; Murata, Akihiko; Lauvset, Siv Kari; Wanninkhof, Rik; Takahashi, Taro; Kosugi, Naohiro; Omar, Abdirahman; van Heuven, Steven; Mathis, Jeremy T. (Peer reviewed; Journal article, 2018-03-22)
      We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure of CO2 in the surface water (pCO2w) using a self-organizing map ...
    • Export of calcium carbonate corrosive waters from the East Siberian Sea 

      Anderson, Leif G.; Ek, Jörgen; Ericson, Ylva; Humborg, Christoph; Semiletov, Igor; Sundbom, Magnus; Ulfsbo, Adam (Peer reviewed; Journal article, 2017-04-05)
      The Siberian shelf seas are areas of extensive biogeochemical transformation of organic matter, both of marine and terrestrial origin. This in combination with brine production from sea ice formation results in a cold ...
    • Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry 

      Jeansson, Emil; Bellerby, Richard; Skjelvan, Ingunn; Frigstad, Helene; Ólafsdóttir, Sólveig R.; Ólafsson, Jón Hjaltalín (Peer reviewed; Journal article, 2015-02-12)
      This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100 m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00° N, 12.67° W), for the years ...
    • Heterogeneity of impacts of high CO2 on the North Western European shelf 

      Artioli, Yuri; Blackford, Jerry C.; Nondal, Gisle; Bellerby, Richard; Wakelin, Sarah L.; Holt, Jason T.; Butenschön, Momme; Allen, Julian Icarus (Peer reviewed; Journal article, 2014-02-03)
      The increase in atmospheric CO2 is a dual threat to the marine environment: from one side it drives climate change, leading to modifications in water temperature, circulation patterns and stratification intensity; on the ...
    • A model study of the seasonal and long-term North Atlantic surface pCO(2) variability 

      Tjiputra, Jerry; Olsen, Are; Assmann, Karen Margarete; Pfeil, Benjamin; Heinze, Christoph (Peer reviewed; Journal article, 2012-03-05)
      A coupled biogeochemical-physical ocean model is used to study the seasonal and long–term variations of surface pCO2 in the North Atlantic Ocean. The model agrees well with recent underway pCO2 observations from the Surface ...
    • Ocean acidification in the subpolar North Atlantic: rates and mechanisms controlling pH changes 

      García-Ibáñez, Maribel I.; Zunino, Patricia; Fröb, Friederike; Carracedo, Lidia I.; Ríos, Aida F.; Mercier, Herlé; Olsen, Are; Pérez, Fiz F. (Peer reviewed; Journal article, 2016-06-23)
      Repeated hydrographic sections provide critically needed data on and understanding of changes in basin-wide ocean CO2 chemistry over multi-decadal timescales. Here, high-quality measurements collected at twelve cruises ...
    • Projected pH reductions by 2100 might put deep North Atlantic biodiversity at risk 

      Gehlen, Marion; Séférian, Roland; Jones, Daniel O.B.; Roy, Tilla; Roth, Raphael; Barry, James P.; Bopp, Laurent; Doney, Scott C.; Dunne, John P.; Heinze, Christoph; Joos, Fortunat; Orr, James C.; Resplandy, Laure; Segschneider, Joachim; Tjiputra, Jerry (Peer reviewed; Journal article, 2014-12-11)
      This study aims to evaluate the potential for impacts of ocean acidification on North Atlantic deep-sea ecosystems in response to IPCC AR5 Representative Concentration Pathways (RCPs). Deep-sea biota is likely highly ...
    • Quantification of iron-rich volcanogenic dust emissions and deposition over the ocean from Icelandic dust sources 

      Arnalds, Olafur; Ólafsson, Haraldur; Dagsson-Waldhauserova, Pavla (Peer reviewed; Journal article, 2014-12-02)
      Iceland has extremely active dust sources that result in large-scale emissions and deposition on land and at sea. The dust has a volcanogenic origin of basaltic composition with about 10% Fe content. We used two independent ...
    • Southern Ocean controls of the vertical marine δ13C gradient – a modelling study 

      Morée, Anne; Schwinger, Jörg; Heinze, Christoph (Peer reviewed; Journal article, 2018-12-04)
      δ 13 C, the standardised 13C/12C ratio expressed in per mille, is a widely used ocean tracer to study changes in ocean circulation, water mass ventilation, atmospheric pCO2, and the biological carbon pump on timescales ...
    • Temporal biomass dynamics of an Arctic plankton bloom in response to increasing levels of atmospheric carbon dioxide 

      Schulz, Kai G.; Bellerby, Richard; Brussaard, Corina P.D.; Büdenbender, Jan; Czerny, Jan; Engel, Anja; Fischer, Matthias; Koch-Klavsen, Signe; Krug, Sebastian A.; Lischka, Silke; Ludwig, Andrea; Meyerhöfer, Michael; Nondal, Gisle; Silyakova, Anna; Stuhr, Annegret; Riebesell, Ulf (Peer reviewed; Journal article, 2013-01-11)
      Ocean acidification and carbonation, driven by anthropogenic emissions of carbon dioxide (CO2), have been shown to affect a variety of marine organisms and are likely to change ecosystem functioning. High latitudes, ...
    • Trends and drivers in global surface ocean pH over the past 3 decades 

      Lauvset, Siv Kari; Gruber, Nicolas; Landschützer, Peter; Olsen, Are; Tjiputra, Jerry (Peer reviewed; Journal article, 2015-03-02)
      We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO2 observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature ...