Introduction

TJ -worked for WRCP, IGBP, SCOR and IOC: IOC-SCOR-JGOFS CO2-panel, 1995-2001, Active getting the JGOFS office to UiB, 1995-2003, SOLAS SSC, 2000-2009, co-author SOLAS Science Plan, chaired writing group - SOLAS and IMBER Carbon Plan. IOCCP 2001-2009. Involved in initiating and operating BCCR SFF (2002-2012), OTC Director , Memb. ICOS RI, Coordinator of ICOS Norway 2008-2018, Coordinator, SSC member and PI in several EU projects. Past projects: ESOP, ESOP2, IMCORP, CAVASSOO, TRACTOR, CARBOOCEAN, MONARCH, CARBOCHANGE, GREENSEAS, EURO-BASINS, ECO2, FIXO3, ATLANTOS, RINGO, SEACRIFOG, STEMCCS. Ongoing projects: INTAROS.

Disciplines

Climatology, Geology, Oceanography

Skills and expertise

Biogeochemistry, Greenhouse Gases, Climate Change, Carbon, Carbon Cycle, Chemical Oceanography, Carbon Dioxide, Surface Water, Air Climate, Sea Ice, Geology, Environment, OceanEstimation, Ocean Modeling, Ice Cover, Arctic Regions, Standard Error, 13C ATM, Paleoclimatology, Atmosphere, Climate Science, Physical Oceanography, Climate Modeling, Physics of Global Warming, Climate Variability, Climate Dynamics, Regional Climate Modeling, Ocean Currents and Circulation, Data Assimilation, Model Development, Oceanography, Singular Spectrum Analysis, Climatology, Stable Isotopes, Hydrology

Research report

• Geir Ottersen; Mikael K. Sejr; Ralf Döscher et al. (2022). Deliverable 6.19 Synthesis report from WP6: Application studies of Arctic Observing Systems towards stakeholders. (external link)
• Erik Buch; Michael Tjernstrøm; Shaun Quegan et al. (2017). Deliverable 1.1 Initial Requirement Report. (external link)
• Abdirahman Omar; Guttorm Alendal; Maribel Garcia-Ibanez et al. (2018). Marine monitoring of carbon capture and storage: Methods, strategy, and potential impacts of excess inorganic carbon in the water column. (external link)
• Melissa Chierici; Ingunn Skjelvan; Richard Bellerby et al. (2014). Overvåking av havforsuring i norske farvann. (external link)
• Lisa Ann Miller; Truls Johannessen; T.T. Noji et al. (1997). Influence of Biological production on inorganic carbon distribution in the Greenland Sea Scientific Report, European Subpolar Ocean Programme (ESOP). (external link)
• Stein Sandven; Hanne Sagen; Torill Hamre et al. (2022). Deliverable 1.10 Roadmap for a sustainable Arctic Observing System. (external link)
• Truls Johannessen; Agnieszka Beszczynska-Möller; Nicholas Patrick Roden et al. (2021). Deliverable 3.11 Final implementation and data: North of Svalbard. (external link)
• Elizabeth Marie Jones; Melissa Chierici; Ingunn Skjelvan et al. (2020). Monitoring ocean acidification in Norwegian seas in 2019. (external link)
• Truls Johannessen; Nicholas Patrick Roden; Are Olsen et al. (2019). Deliverable 3.7 First implementation and data: North of Svalbard. (external link)
• Guttorm Alendal; Abdirahman Omar; AR Denny et al. (2013). Technical synthesis report on droplet/bubble dynamics, plume dynamics and modelling parameters, use of hydro-acoustics to quantify droplet/bubble fluxes, and carbonate system variable assessment. (external link)
• Helle Augdal Botnen; Abdirahman Omar; Ivar Aavatsmark et al. (2014). Unintended releases of Carbon Dioxide (CO2) from offshore pipelines: thermodynamic processes and the fundamental hydrodynamical equations. (external link)
• Ingunn Skjelvan; Emil Jeansson; Melissa Chierici et al. (2014). Havforsuring og opptak av antropogent karbon i de Nordiske hav, 1981-2013, M244-2014. (external link)
• Ingunn Skjelvan; Emil Jeansson; Melissa Chierici et al. (2022). Trender i havforsuring og antropogent karbon i de nordiske hav, Nordsjøen og Skagerrak. (external link)
• Melissa Chierici; Ingunn Skjelvan; Marit Norli et al. (2015). Overvåking av havforsuring i norske farvann i 2014. (external link)
• Peter Liss; Philip Boyd; Elsa Cortijo et al. (2004). The Surface Ocean - Lower Atmosphere Study (SOLAS) Science Plan and Implementation Strategy. (external link)
• Melissa Chierici; Ingunn Skjelvan; Marit Norli et al. (2017). Havforsuringsovervåking i norske farvann i 2016. (external link)
• Heike Lueger; Rik Wanninkhof; Are Olsen et al. (2008). The air-sea CO2 flux in the North Atlantic estimated from satellite and ARGO profiling float data. (external link)
• Michael Tjernstrøm; Roberta Pirazzini; Stein Sandven et al. (2019). Deliverable 2.10. Synthesis of gap analysis and exploitation of the existing Arctic observing systems. (external link)
• Ingunn Skjelvan; Elizabeth Marie Jones; Melissa Chierici et al. (2021). Monitoring ocean acidification in Norwegian seas in 2020 / Havforsuringsovervåking i norske farvann i 2020. (external link)
• Johannes Beck; Ana López-Ballesteros; Abdirahman Omar et al. (2018). Identification of Key Variables for Climate Change Observation across Africa. SEACRIFOG Deliverable 4.1: Ideal and Mandatory Sets of Variables and Criteria. (external link)
• Ingunn Skjelvan; Elizabeth Marie Jones; Melissa Chierici et al. (2021). Monitoring ocean acidification in Norwegian seas in 2020. (external link)
• Melissa Chierici; Ingunn Skjelvan; Marit Norli et al. (2016). Overvåking av havforsuring i norske farvann i 2015. (external link)
• Agnieszka Beszczynska-Möller; Andreas Ahlstrøm; Roberta Pirazzini et al. (2022). Deliverable 3.16 Synthesis and technical recommendations. (external link)
• Leif Anderson; M. Chierici; E. Fogelqvist et al. (1997). Excess dissolved inorganic carbon in the deep Greenland Sea, Scientific Report, European Subpolar Ocean Programme (ESOP). (external link)
• Carsten Ankjær Ludvigsen; Roberta Pirazzini; Hanne Sagen et al. (2018). Deliverable 2.1 Report on present observing capacities and gaps: ocean and sea ice observing system. (external link)
• Ana López-Ballesteros; Johannes Beck; Ingunn Skjelvan et al. (2019). Training workshops in measurement, data management and quality control methodologies for the observation of greenhouse gas dynamics in the atmospheric, oceanic and terrestrial domains. SEACRIFOG Deliverable 4.4.. (external link)
• Elizabeth Marie Jones; Melissa Chierici; Ingunn Skjelvan et al. (2019). Monitoring ocean acidification in Norwegian seas in 2018/ Havforsuringsovervåking i norske farvann i 2018. M-1417. (external link)
• Truls Johannessen (2004). Tracer and circulation in the Nordic Seas Region. (external link)
• Ingunn Skjelvan; Abdirahman Omar; Elsheikh Bashir Ali et al. (2019). Training workshop with focus on preparing oceanographic data for sharing, Deliverable 5.3 from the EU project 730995 SEACRIFOG. (external link)
• Melissa Chierici; Kai Sørensen; Truls Johannessen et al. (2013). Tilførselsprogrammet 2012. Overvåking av havforsuring av norske farvann. (external link)

Media interview

• Truls Johannessen (2010). Norsk kulde, global varme. (external link)
• Truls Johannessen (2014). Vil spore ørsmå CO2-lekkasjer. (external link)
• Truls Johannessen (2009). Havet tar opp mindre CO2. (external link)
• Truls Johannessen; Tor Lindebotten (2002). Forsker på gåtefulle virvler. (external link)
• Truls Johannessen; Are Olsen; Knut Yngve Borsheim et al. (2010). Overvåker forsuring i havet. (external link)
• Truls Johannessen (2009). Nå har verdenshavene nådd et metningspunkt. (external link)
• Truls Johannessen (2009). CO2-stans i havet. (external link)
• Truls Johannessen (2014). CO2-lekkasjer og naturlige variasjoner. (external link)
• Truls Johannessen (2009). Havet sluker mindre CO2. (external link)
• Truls Johannessen; Silje Gripsrud (2003). Tar pulsen på klimasystemet. (external link)
• Siv Kari Lauvset; Are Olsen; Ingunn Skjelvan et al. (2011). Klimavariasjoner styrer CO2-opptak. (external link)
• Truls Johannessen (2009). Havet sluker mindre CO2. (external link)
• Truls Johannessen (2011). CO2-utslipp på havet bekymrer. (external link)
• Truls Johannessen (2011). Bekymret for virkningen av CO2-utslipp på havet. (external link)
• Truls Johannessen (2007). Dramatisk endring i havets CO2-opptak. (external link)
• Truls Johannessen; Christoph Heinze (2009). Klimaendringer minker havets evne til å stoppe klimaendringer. (external link)
• Truls Johannessen (2002). "Bjerknesforskeres funn forklarer dypvannsdannelse - ny artikkel i Nature". (external link)
• Truls Johannessen (2009). Havet mettet på CO2. (external link)
• Truls Johannessen (2014). Trygg CO2-lagring i Nordsjøen?. (external link)
• Truls Johannessen (2002). "Bedre kartleggingsmuligheter". Om nye G.O. Sars. (external link)
• Truls Johannessen (2009). Havet mettet på CO2. (external link)
• Truls Johannessen; Christoph Heinze (2011). CO2-jakt ledes fra Bergen. (external link)
• Truls Johannessen (2009). Havet mettet på CO2. (external link)
• Truls Johannessen (2009). Havet tar opp mindre CO2. (external link)
• Truls Johannessen (2009). Havet mettet på CO2. (external link)
• Truls Johannessen (2012). Vil overvåke CO 2 i havet fra Bergen. (external link)
• Truls Johannessen (2011). Bergen styrer forskning om havets CO2-opptak. (external link)

Popular science article

• Are Olsen; Abdirahman Omar; Ingunn Skjelvan et al. (2008). The Bjerknes Centre pCO2 observing network. (external link)
• Truls Johannessen; Tor Eldevik; Anders Olsson et al. (2004). Spredning av SF6 i Grønlandshavet. (external link)
• Are Olsen; Rey Francisco; Truls Johannessen (2001). Havklimaets betydning for biologisk produksjon: En flerårs studie fra Fugløya-Bjørnøyasnittet. (external link)

Conference poster

• Emil Jeansson; Are Olsen; Tor Eldevik et al. (2009). Transports, budget and variability of inorganic carbon in the Nordic Seas. (external link)
• Siv Kari Lauvset; Truls Johannessen; Are Olsen et al. (2007). North Atlantic fCO2 variability in time and space. (external link)
• Anders Olsson; Toste Tanhua; Tor Eldevik et al. (2006). Export of Ventilated Water From the Nordic Seas to the North Atlantic and Arctic Oceans Investigated by Released SF6. (external link)
• Benjamin Pfeil; Are Olsen; A. Kozyr et al. (2009). Surface Ocean CO2 atlas. (external link)
• Marie Eide; Ulysses S Ninnemann; Truls Johannessen et al. (2013). Natural δ13C distributions in the Global Ocean. (external link)
• Abdirahman Omar; Truls Johannessen (2001). can cold brine formation intensify the oceanic uptake of atmospheric CO2?. (external link)
• Friederike Fröb; Are Olsen; Meike Becker et al. (2017). Impact of North Atlantic freshening on sea surface fCO2. (external link)
• Siv Kari Lauvset; Are Olsen; Ingunn Skjelvan et al. (2009). North Atlantic Relationships between surface fCO2 and Hydrography, evaluated using fCO2-SST Relationships. (external link)
• A. Olsson; Emil Jeansson; M. -J. Messias et al. (2008). Pathway and mixing of Greenland Sea water to the Faroe area and the Iceland Basin. (external link)
• Ingunn Skjelvan; Truls Johannessen (2012). Carbonate variability at the Arctic entrance - Carbon time series at Ocean Weather Station M. (external link)
• Emil Jeansson; Are Olsen; Sara Jutterström et al. (2014). Ventilation age and anthropogenic CO2 evolution in the Greenland Sea during the last decade. (external link)
• Truls Johannessen; Are Olsen; Craig Chandler Neill et al. (2007). pCO2 measurements on the VOS M/V Nuka Arctica in the northern North Atlantic. (external link)
• Siv Kari Lauvset; Are Olsen; Truls Johannessen et al. (2008). Assessment of the temporal and spatial changes of surface ocean fCO2 in the Nordic Seas, Barents Sea, and northern North Atlantic. (external link)
• Abdirahman Omar; Are Olsen; Truls Johannessen (2007). Air-sea ice CO2 flux variability in marginal seas bordering Norway: Barents Sea and North Sea. (external link)
• Abdirahman Omar; Charles Roman Battisti; Emil Jeansson et al. (2017). Ocean Thematic Centre (OTC) one of the central facilities of the ICOS RI.. (external link)
• Svetlana Milutinovic; Michael J. Behrenfeld; Johnny A. Johannessen et al. (2010). Sensitivity of Ocean-Colour-Based Phytoplankton Productivity Estimates to Mixed Layer Depth. (external link)
• N. Metzl; A. Corbiere; Gilles Reverdin et al. (2009). Acceleration of sea surface fCO2 growth rate in the North Atlantic subpolar gyre (1993-2008). (external link)
• Balamuralli Rajasakaren; Emil Jeansson; Are Olsen et al. (2017). Decadal Changes in Ventilation and Anthropogenic Carbon in the Intermediate Depths of the Arctic Ocean. (external link)
• Abdirahman Omar; Helle Augdal Botnen; Ingunn Hindenes Thorseth et al. (2014). The impact of submarine CO2 vents fields on seawater: implications for monitoring subsea carbon sequestration leakage. (external link)
• M. Telszewski; Y. Nojiri; U. Schuster et al. (2010). Air-sea flux in the North Atlantic and the North Pacific estimated by neural network. (external link)
• Abdirahman Omar; Truls Johannessen (2000). Chemical characterisation of waters in Storfjorden. (external link)
• Abdirahman Omar; Truls Johannessen (2000). Potential Brine Water Sources in Storfjorden. (external link)
• Abdirahman Omar; Truls Johannessen; Are Olsen (2007). CO2 variability in the Barents Sea: synthesis of available data and ongoing measurements. (external link)
• Siv Kari Lauvset; Are Olsen; Truls Johannessen et al. (2008). Effects of changes in mixing and temperature on carbon dioxide fugacity in the Northern North Atlantic and Norwegian Sea. (external link)
• Helle Augdal Botnen; Abdirahman Omar; Ivar Aavatsmark et al. (2012). PVTx properties of a two-phase Co2 jet from ruptured pipeline. (external link)
• Abdirahman Omar; Truls Johannessen (2001). can cold brine formation intensify the oceanic uptake of atmospheric CO2?. (external link)
• María Isabel García-Ibáñez; Abdirahman Omar; Truls Johannessen (2017). Geochemical monitoring for detection of CO2 leakage from subsea storage sites. (external link)
• Are Olsen; Leif Anderson; Truls Johannessen (2001). Climate forcing of oxygen fluxes in the Barents Sea. (external link)
• Ingunn Skjelvan; Siv Kari Lauvset; Truls Johannessen et al. (2022). Trends in Ocean Acidification in the Norwegian Sea. (external link)
• Abdirahman Omar; Truls Johannessen; Richard Bellerby et al. (2004). Sea ice and brine formation in Storfjorden: Implications for the Arctic winter time air-sea CO2 flux. (external link)
• Abdirahman Omar; Einar Heegaard; Are Olsen et al. (2007). Variations of the air-sea CO2 flux in the North Sea: a new statistical method to assess the reliability of the estimates. (external link)
• Abdirahman Omar; Helle Augdal Botnen; Ingunn Skjelvan et al. (2014). Annual and interannual variations of carbon cycling parameters in Arctic and temperate Norwegian fjords. (external link)
• Christoph Heinze; Truls Johannessen; Andrea Nicole Volbers et al. (2005). CARBOOCEAN - an EU Integrated Project focusing on the ocean's role for the uptake of atmospheric CO2. (external link)
• Agnieszka Beszczynska-Möller; Hanne Sagen; Peter Voss et al. (2020). HE34A-1990 Enhancement of ocean and sea ice insitu observations in the Arctic under the Horizon 2020 project INTAROS.. (external link)
• Agnieszka Beszczynska-Möller; Hanne Sagen; Mikael Sejr et al. (2019). Enhancement of ocean and sea ice insitu observations in the Arctic under the H2020 project INTAROS. (external link)
• Are Olsen; Richard Bellerby; Peter M. Haugan et al. (2004). Bjerknes activity 8: Ocean carbon cycle and biogeochemistry. (external link)
• Are Olsen; Abdirahman Omar; Richard Bellerby et al. (2005). Nordic Seas Anthropogenic CO2 Increase and 13C Suess Effect Over the Last two Decades. (external link)

Conference lecture

• Ingunn Skjelvan; Siv Kari Lauvset; Truls Johannessen et al. (2023). Decadal trends from the Ocean Weather Station M. (external link)
• Abdirahman Omar; Truls Johannessen (2001). Can cold brine formation intensify the oceanic uptake of atmospheric CO2?. (external link)
• Guttorm Alendal; Anna Oleynik; Nello Blaser et al. (2018). The need for proper environmental statistics to design adequate monitoring for offshore geological storage of CO2 projects.. (external link)
• Are Olsen; Siv K. Lauvseth; Ingunn Skjelvan et al. (2007). Surface Ocean CO2 Variability and Vulnerabilities: The Arctic Ocean and Nordic Seas. (external link)
• Meike Becker; Are Olsen; Abdirahman Omar et al. (2017). Surface ocean pCO2 measurements within ICOS Norway and the example of M/V Nuka Arctica. (external link)
• M.J. Messias; A.J. Watson; E. Guilyardi et al. (1998). Study of Vertical Mixing Processes in the Greenland Sea Using Tracer Release Results. (external link)
• J.J. Kruepke; K.A. Van Scoy; D. Cooper et al. (1998). Horizontal Evolution and Distribution of SF6L Tracer: Greenland Sea Central Byre July 1996-May 1997. (external link)
• Are Olsen; Ingunn Skjelvan; Abdirahman Omar et al. (2005). Establishing a northen North Atlantic CO2 observing network. (external link)
• Richard Bellerby; Are Olsen; Gisle Nondal et al. (2010). Ocean acidification response to surface ocean conditioning and transport - processes influencing anthropogenic carbon change in the Arctic and Southern oceans. (external link)
• Truls Johannessen (2004). Internal forcing in the Nordic Seas and pathways to the overflows. (external link)
• Are Olsen; Truls Johannessen; Rey Francisco (2001). The effect of physical forcing on food web dyamics at the entrance to the Barents Sea. (external link)
• Tor Eldevik; Helge Drange; Truls Johannessen et al. (2002). Resolved and parameterized convective eddies in the Greenland Sea. (external link)
• Truls Johannessen; Eystein Jansen; Leif Anderson et al. (1997). The Grennland Sea Experiment. Contribution from the ESOP2 scientific team- MAST III-programme. (external link)
• Marie-Jose Messias; Andrew J. Watson; Elisabeth Fogelqvist et al. (1997). A study of diacpycnal mixing and winter convection in the open ocean: the Greenland Sea Tracer Release Experiment - ESOP 2. (external link)
• Ingunn Skjelvan; Truls Johannessen; Lisa Miller (1997). fCO2 in the Nordic Sea. (external link)
• Marie Eide; Are Olsen; Ulysses S Ninnemann et al. (2014). Natural δ13C distributions in the global ocean. (external link)
• Truls Johannessen; Richard Bellerby; Eystein Jansen et al. (2001). The Greenland Sea Experiment. (external link)
• Truls Johannessen; Richard Bellerby; Abdirahman Omar et al. (2001). The role of convection and seasonal to interannual variability on carbon uptake in the Nordic seas. (external link)
• E Jeansson; Are Olsen; Tor Eldevik et al. (2012). A carbon budget for the Nordic Seas. (external link)
• M.J. Messias; A.J. Watson; M. Fogelqvist et al. (2000). The Greenland Sea tracer experiment. (external link)
• Abdirahman Omar; Truls Johannessen (2009). What parameters should be measured in the water column during a baseline study?. (external link)
• Abdirahman Omar; Truls Johannessen (2010). CO2 storage sites in the North Sea Overview: WP Water Column. (external link)
• Abdirahman Omar; Elsheikh Bashir Ali; Ingunn Skjelvan et al. (2014). The inorganic carbon cycle in the Red Sea studied using historical cruise data and five years long coastal time series. (external link)
• Truls Johannessen; Leif G. Anderson; Richard Bellerby et al. (2002). The role of convection and seasonal to interannual variability on carbon uptake in the Nordic Seas, Ocean Sciences Meeting. (external link)
• Are Olsen; Jerry Tjiputra; Carin Andersson et al. (2014). Current and planned carbon cycle research at the Bjerknes Centre for Climate Research. (external link)
• Tor Eldevik; Helge Drange; Truls Johannessen et al. (2002). Convective Submesoscale Coherent Vortices in the Greenland Sea. (external link)
• Jean-Claude Gascard; Andrew Watson; Marie-José Messias et al. (2002). Long-lived vortices as a mode of deep ventilation in the Greenland Sea. (external link)
• Margareth Hansen; Truls Johannessen; Eva Falck et al. (1997). Thermohaline circulation in the Greenland Sea and carbon transport. (external link)
• Ingunn Skjelvan; Are Olsen; Abdirahman Omar et al. (2013). Ocean acidification and trends in the Norwegian Sea. (external link)
• Marie Eide; Are Olsen; Ulysses S Ninnemann et al. (2017). Global ocean climatology of the 13C suess effect and preindustrial δ13C. (external link)
• Yoshie Kasajima; Truls Johannessen; Ingunn Skjelvan et al. (2004). The potential role of submesoscale coherent vortices in vertical transport in the Greenland Sea. (external link)
• Ingunn Skjelvan; Siv Kari Lauvset; Truls Johannessen et al. (2023). Decadal trends from the Ocean Weather Station M. (external link)
• Richard Bellerby; M. DeGrandpre; Are Olsen et al. (2000). Shining new light on marine carbon dioxide. (external link)
• Truls Johannessen; Leif G. Andersson; Eva Falck et al. (2000). The carbon cycle in the Nordic Seas, A synthesis done during the CARDEEP era. (external link)
• Abdirahman Omar; Truls Johannessen (2000). Potential brine water sources in Storfjord. (external link)
• Are Olsen; Truls Johannessen; Fransisco Rey (2000). Time series from the entrance to the Barents Sea. A study of the link between the annual to interannual changes in observed hydrographic variability and nutrient response. (external link)
• Truls Johannessen; Richard Bellerby; Abdirahman Omar et al. (2001). Developing an autonomous high precision pH sensor for high quality pH profiling of the water column and fCO2 measurements from ships of opportunities, "Autonomous Biogeochemical Measurements in the Ocean". (external link)
• Truls Johannessen; Marie-José Messias; Anders Olsson et al. (2001). Ocean pathways as seen by tracers and transport of carbon in the Nordic Seas. (external link)
• Are Olsen; Melissa Chierici; Rik Wanninkhof et al. (2006). Towards North Atlantic subpolar gyre pCO2 algoritms. (external link)
• Abdirahman Omar; Truls Johannessen; Richard Bellerby et al. (2005). Sea Ice brinbe formation in Storfjorden: implications for the Arctic winter time air-sea CO2 flux. (external link)
• Abdirahman Omar; Are Olsen; C Neil et al. (2009). Marine carbon measurement techniques. (external link)
• Marie-José Messias; Andrew Watson; Anders Olsson et al. (2002). Circulation in the Nordic Seas and Contribution to the Scotland-F‘roe-Iceland-Greenland Ridge System Overflow from Five Years Observation of a Tracer Release in the Greenland Sea. (external link)
• Truls Johannessen; Eystein Jansen; Leif Anderson et al. (1997). The Greenland Sea Experiment. Contribution from the ESOP2 scientific team (MAST III-programme). (external link)
• Izuo Aya; Sadahiro Namie; Kenji Yamane et al. (2003). Progress of COSMOS (CO2 sending method for ocean storage) and OACE (Ocean abyssal carbon experiment). (external link)
• Truls Johannessen; M-J. Messias; A.J. Watson et al. (1997). Studies of vertical and horisontal mixing processes in the Greenland Sea based upon the SF6 tracer release experiment. (external link)
• Abdirahman Omar; Are Olsen; Truls Johannessen (2006). Air-sea CO2 flux variability in the North Sea: 19 months of observations from voluntry observing ships. (external link)
• M. -J. Messias; Andrew J. Watson; Truls Johannessen et al. (2006). Mixing and Transport in the Greenland Sea for the 1996-2003 Period From a Tracer Experiment. (external link)
• Emil Jeansson; A. Olsson; T. Tanhua et al. (2008). Recent changes in the Greenland Sea: Tracers and Hydrography. (external link)
• Svetlana Milutinovic; M.J. Behrenfeld,; J.A. Johannessen et al. (2010). Sensitivity of satellite-derived phytoplankton productivity to mixed layer depth. (external link)
• Truls Johannessen; Leif G. Andersson; Richard Bellerby et al. (2000). The Carbon cycle in the Nordic Seas, a perspective. (external link)
• Are Olsen; Truls Johannessen; Fransisco Rey (2000). Time series from the Fugløy-Bjørnøy section. A study of the interannual to annual change in the carbon variables. (external link)
• Lisa A. Miller; T.T. Noji; Ingunn Skjelvan et al. (2000). Biogeochemical Constraints on Carbon Drawdown and Export in the Greenland Sea. (external link)
• Are Olsen; Abdirahman Omar; Richard Bellerby et al. (2006). The anthropogenic CO2 increase and 13C Suess effect in the northern North Atlantic. (external link)
• Emil Jeansson; Are Olsen; Tor Eldevik et al. (2010). The Nordic Seas Carbon Budget: Sources, Sinks And Uncertainties. (external link)
• Leif G. Andersson; Knut Y. Børsheim; M. Chierici et al. (2000). The Carbon Cycle in the Greenland Sea. (external link)
• Ingunn Skjelvan; Truls Johannessen; Abdirahman Omar (2000). fCO2 variations and fCO2 calculations in the Greenland Sea surface water. (external link)
• Truls Johannessen; Eystein Jansen; Leif G. Andersson et al. (1998). The Greenland Sea Experiment. (external link)
• Truls Johannessen; Abdirahman Omar; Laila Johanne Reigstad (2012). WP 5: Detection of potential leakage of injected CO2 and its potential effect on the environment. (external link)
• Liliane Merlivat; M. Hood; Truls Johannessen (1998). Time series of pCO2, SST and fluorescence data measured by Carioca Buoys drifting in the Greenland Sea between August 1996 and April 1997. (external link)
• E.M. Hood; Lilliane Merlivat; Truls Johannessen (1998). pCO2 variations and air-sea flux of CO2 in the Greenland Sea using high-frequency time-series data from CARIOCA drift-buoys. (external link)
• Abdirahman Omar; Are Olsen; Truls Johannessen et al. (2011). Spatiotemporal variations of fCO2 in the North Sea. (external link)
• Marie Eide; Are Olsen; Ulysses S Ninnemann et al. (2014). Global ocean 13C Suess effect and uptake of anthropogenic CO2. (external link)
• Are Olsen; Richard Bellerby; Truls Johannessen et al. (2009). Havforsuring - utvikling og prognoser for norske farvann. (external link)
• Truls Johannessen (2010). Variability of the North Atlantic sink for atmospheric carbon. (external link)
• Agnieszka Beszczynska-Möller; Andreas P. Ahlstrøm; Peter Voss et al. (2021). Enhancement of in situ observing systems in the Arctic. (external link)
• A.J. Watson; M.-J. Messias; E. Fogelqvist et al. (1997). A tracer release to study the thermohaline circulation of the Greenland Sea. (external link)
• I Modal; Truls Johannessen; Eystein Jansen (1997). Carbon Isotopes and The Carbon Cycle in the Greenland Sea. (external link)
• Arild Sundfjord; Knut Barthel; Margareth Hansen et al. (1997). Tracer release experiments in the Greenland Sea simulated in an OGCM. (external link)
• Svetlana Milutinovic; M.J. Behrenfeld,; J.A. Johannessen et al. (2010). Sensitivity of satellite-derived phytoplankton productivity to mixed layer depth. (external link)
• Richard Bellerby; Truls Johannessen (2000). Development of a deep water pH sensor for the COSMOS. (external link)
• Ingunn Skjelvan; Truls Johannessen; Lisa A. Miller (2000). Interannual variability in the Greenland and Norwegian Seas. (external link)
• Siv Kari Lauvset; Are Olsen; Ingunn Skjelvan et al. (2009). North Atlantic relationships between surface fCO2 and hydrography, evaluated using fCO2-SST relationships. (external link)
• Richard Bellerby; Are Olsen; Truls Johannessen (2000). Spectrophotometric seawater pH in the Weddell and Norwegian Seas: A new tool for monitoring carbon uptake by the ocean. (external link)
• Leif G. Anderson; M. Chierice; Helge Drange et al. (1998). Annual variability of carbon flux in the upper Greenland Sea, as evaluated from measured data and box model. (external link)
• Truls Johannessen (2012). ICOS, the Norwegian branch. (external link)
• Abdirahman Omar; Truls Johannessen; Peter M. Haugan (2010). Konsekvenser av CO2 lekkasje. (external link)
• Truls Johannessen; Vegard Opheim; Eystein Jansen (1998). European subpolar ocean programme, phase 2: The thermohaline circulation in The Greenland Sea. (external link)
• A.J. Watson; M.J. Messias; E. Fogelqvist et al. (1998). A Tracer Release to Study Thermohaline Processes in the Greenland Sea. (external link)
• Andrew Watson; Richard Bellerby; P. Ciais et al. (2002). Measuring the sink for carbon dioxide in the North Atlantic from ships of oppportunity: the CAVASSOO project. (external link)
• Helene Frigstad; T. Andersen; Dag Olav Hessen et al. (2012). Long-term trends in carbon, nutrients and stoichiometry in Norwegian coastal waters: evidence of a regime shift. (external link)
• Helene Frigstad; T Andersen; Dag Olav Hessen et al. (2012). Long-term changes in carbon and nutrient biogeochemistry in Skagerrak. Bjekrnes Getawai. (external link)
• Truls Johannessen (2003). Changes in modes of ocean carbon cycling from past to present - what can this tell about the future. (external link)
• Truls Johannessen; Abdirahman Omar; Laila Johanne Reigstad et al. (2012). Status WP5: The Marine Component. (external link)
• Are Olsen; Abdirahman Omar; Richard Bellerby et al. (2006). Carbon changes in the high latitude North Atlantic. (external link)
• M Telzewski; U. Schuster; A. J. Watson et al. (2009). Air-sea CO2 flux in the North Atlantic in 2004 through 2006 estimated by the neural network. (external link)
• Are Olsen; Richard Bellerby; Truls Johannessen et al. (2002). Instumentation for in Situ and Autonomous Monitoring of the Marine Carbon Dioxide System. (external link)
• Ingunn Skjelvan; Truls Johannessen; Lisa Miller (1997). fCO2 in the Nordic Sea. (external link)
• Margareth Hansen; Truls Johannessen; Eva Falck et al. (1997). Thermohaline circulation in the Greenland Sea and carbon transport. (external link)
• Lisa A. Miller; Truls Johannessen; T. Noji et al. (1997). Seasonal variability in dissolved inorganic carbon distribution in the Greenland Sea. (external link)
• Peter M. Haugan; Peter G. Brewer; E.T. Peltzer et al. (2004). Ocean Abyssal Carbon Experiments at 0.7 and 4 km depth. (external link)

Academic article

• Ryuji Kojima; Izuo Aya; Kenji Yamane et al. (2004). The OACE (Ocean Abyssal Carbon Experiment) research project. (external link)
• C Le Quere; Robbie Andrew; P. Friedlingstein et al. (2018). Global Carbon Budget 2018. (external link)
• Yoshie Kasajima; Truls Johannessen (2009). Role of cabbeling in water densification in the Greenland Basin. (external link)
• Emil Jeansson; Anders Olsson; Marie-José Messias et al. (2009). Evidence of Greenland Sea water in the Iceland Basin. (external link)
• Abdirahman Omar; Truls Johannessen; Are Olsen et al. (2007). Seasonal and interannual variability of the air-seaCO(2) flux in the Atlantic sector of the Barents Sea. (external link)
• AJ Watson; U Schuster; DCE Bakker et al. (2009). Tracking the Variable North Atlantic Sink for Atmospheric CO2. (external link)
• Abdirahman Omar; Truls Johannessen; Stafan Kaltin et al. (2004). Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water. (external link)
• Balamuralli Rajasakaren; Emil Jeansson; Are Olsen et al. (2019). Trends in anthropogenic carbon in the Arctic Ocean. (external link)
• Salma Elageed; Abdirahman Omar; Emil Jeansson et al. (2025). Organic Carbon Remineralization and Calcium Carbonate Production Rates in the Red Sea Computed From Oxygen and Alkalinity Utilizations. (external link)
• Truls Johannessen; A.J. Watson; M.-J. Messias et al. (1999). Mixing and convection in the Greenland Sea from a tracer-release experiment. (external link)
• Atle Nesje; Truls Johannessen; Harry John Betteley Birks (1995). Briksdalsbreen, western Norway: climatic effects on the terminal response of a temperate glacier between AD 1901 and 1994. (external link)
• Anders Olsson; E Jeansson; Leif Gunnar Anderson et al. (2005). Intermediate water from the Greenland Sea in the Faroe Bank Channel: spreading of released sulphur hexafluoride. (external link)
• Eyvind Aker; Tore Ingvald Bjørnarå; Alvar Braathen et al. (2011). SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy. (external link)
• Anders Olsson; E. Jeansson; Leif Gunnar Anderson et al. (2004). Intermediate water from the Greenland Sea in the Faroe Bank Channel: spreading of released sulphur hexafluoride. (external link)
• Denis Pierrot; Craig Chandler Neill; Kelvin Sullivan et al. (2009). Recommendations for autonomous underway pCO(2) measuring systems and data-reduction routines. (external link)
• Abdirahman Omar; Are Olsen; Truls Johannessen et al. (2010). Spatiotemporal variations of fCO2 in the North Sea. (external link)
• Corinne Le Quéré; Robbie Andrew; Pierre Friedlingstein et al. (2018). Global Carbon Budget 2017. (external link)
• Are Olsen; Leif G. Anderson; Truls Johannessen (2002). The impact of climate variations on fluxes of oxygen in the Barents Sea. (external link)
• Ingunn Skjelvan; Siv Kari Lauvset; Truls Johannessen et al. (2022). Decadal trends in Ocean Acidification from the Ocean Weather Station M in the Norwegian Sea. (external link)
• A.J. Watson; M.J. Messias; E. Fogelquist et al. (1999). mixing and convection in the Greenland Sea from a tracer-release experiment. (external link)
• Leif G. Anderson; M. Chierici; E. Fogelqvist et al. (1998). Flux of Anthropogenic and Steady State carbon into the deep Greenland Sea. (external link)
• Are Olsen; R.M. Key; Emil Jeansson et al. (2009). Overview of the Nordic Seas CARINA data and salinity measurements. (external link)
• Nicolas Metzl; Antoine Corbière; Gilles Reverdin et al. (2010). Recent acceleration of the sea surface fCO2 growth rate in the North Atlantic subpolar gyre (1993–2008) revealed by winter observations. (external link)
• Richard Bellerby; K. G. Schulz; U. Riebesell et al. (2008). Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment. (external link)
• Hilde Kristine Hvidevold; Guttorm Alendal; Truls Johannessen et al. (2012). Assessing model parameter uncertainties for rising velocity of CO2 droplets through experimental design. (external link)
• Maciej Telszewski; Aymeric Chazottes; Ute Schuster et al. (2009). Estimating the monthly pCO2 distribution in the North Atlantic using a self-organizing neural network. (external link)
• Leif G. Andersson; M. Chierici; M. Fogelqvist et al. (2000). Flux of anthropogenic carbon and steady state carbon into the deep Greenland Sea. (external link)
• Abdirahman Omar; Truls Johannessen; S.A. Kaltin et al. (2003). Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water. (external link)
• Siv Kari Lauvset; Melissa Chierici; Francois Counillon et al. (2013). Annual and seasonal fCO(2) and air-sea CO2 fluxes in the Barents Sea. (external link)
• Taro Takahashi; Stewart C. Sutherland; Rik Wanninkhof et al. (2009). Climatological mean and decadal change in surface ocean pCO2, andnet sea–air CO2 flux over the global oceans. (external link)
• E.M. Hood; Liliane Merlivat; Truls Johannessen (1999). fCO2 variations and air-sea flux of CO2 in the Greenland Sea gyre using high-frequency time-series data from CARIOCA drift buoys. (external link)
• Helle Augdal Botnen; Abdirahman Omar; Ingunn Hindenes Thorseth et al. (2015). The effect of submarine CO2 vents on seawater: Implications for detection of subsea carbon sequestration leakage. (external link)
• Are Olsen; Richard Bellerby; Truls Johannessen et al. (2003). Interannual variability in the wintertime air-sea flux of carbon dioxide in the northern North Atlantic, 1981-2001. (external link)
• Dorothee C.E. Bakker; Benjamin Pfeil; Are Olsen et al. (2014). An update to the Surface Ocean CO2 Atlas (SOCAT version 2). (external link)
• Corinne Le Quéré; Roisin Moriarty; Robbie Andrew et al. (2015). Global carbon budget 2014. (external link)
• Leif G. Andersson; Helge Drange; M. Chierici et al. (1998). Annual vaiability of carbon flux in the upper Greenland Sea, as evaluated from measured data and a box model. (external link)
• Jean-Claude Gascard; Andrew Watson; Marie-José Messias et al. (2002). Long-lived vortices as a mode of deep ventilation in the Greenland Sea. (external link)
• Are Olsen; Rik Wanninkhof; J.A. Triñanes et al. (2005). The effect of wind speed products and wind speed-gas exchange relationships on interannual variability of the air-sea CO2 gas transfer velocity. (external link)
• Vassilis Kitidis; Jamie D. Shutler; Ian Ashton et al. (2019). Winter weather controls net influx of atmospheric CO2 on the north-west European shelf. (external link)
• Sara Filippa Krusmynta Fransner; Friederike Fröb; Jerry Tjiputra et al. (2022). Acidification of the Nordic Seas. (external link)
• Marie Eide; Are Olsen; Ulysses S Ninnemann et al. (2017). A global ocean climatology of preindustrial and modern ocean δ13C. (external link)
• Richard Bellerby; K.G. Schulz; U. Riebesell et al. (2007). Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment. (external link)
• N. Lefèvre; A.J. Watson; Are Olsen et al. (2003). A decrease in the sink for atmospheric CO2 in the North Atlantic. (external link)
• Leif G. Andersson; Helge Drange; M. Chierici et al. (2000). Annual carbon fluxes in the upper Greenland Sea based measurements and a box model approach. (external link)
• Caroline Kivimäe; Richard Bellerby; Ageneta Fransson et al. (2010). A carbon budget for the Barents Sea. (external link)
• Benjamin Pfeil; Are Olsen; D. C. E. Bakker et al. (2013). A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT). (external link)
• Gisle Nondal; Richard Bellerby; Are Olsen et al. (2009). Optimal evaluation of the surface ocean CO2 system in the northern North Atlantic using data from voluntary observing ships. (external link)
• Are Olsen; Richard Bellerby; Truls Johannessen et al. (2004). Interannual variability in the wintertime air-sea flux of carbon dioxide in the northern North Atlantic, 1981-2001. (external link)
• Sayaka Yasunaka; Akihiko Murata; Eiji Watanabe et al. (2016). Mapping of the air-sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability. (external link)
• PG Brewer; ET Peltzer; P Walz et al. (2005). Deep ocean experiments with fossil fuel carbon dioxide: Creation and sensing of a controlled plume at 4 km depth. (external link)
• L.A. Miller; M. Chierici; Truls Johannessen et al. (1999). Seasonal dissolved inorganic carbon variations in the Greenland Sea and implications for atmospheric CO2 exchange. (external link)
• Hilde Kristine Hvidevold; Guttorm Alendal; Truls Johannessen et al. (2016). Survey strategies to quantify and optimize detecting probability of a CO<sub>2</sub> seep in a varying marine environment. (external link)
• Are Olsen; Truls Johannessen; Fransisco Rey (2003). On the nature of the factors that control spring bloom development at the entrance to the Barents Sea, and theri interannual variability. (external link)
• Marie-José Messias; Andrew J. Watson; Truls Johannessen et al. (2008). The Greenland Sea tracer experiment 1996–2002: Horizontal mixing and transport of Greenland Sea Intermediate Water. (external link)
• Elsheikh B. Ali; Ingunn Skjelvan; Abdirahman Omar et al. (2021). Sea surface pCO2 variability and air-sea CO2 exchange in the coastal Sudanese Red Sea. (external link)
• Ingunn Skjelvan; Truls Johannessen; Lisa Ann Miller (1999). Interannual variability of fCO2 in the Greenland and Norwegian Seas. (external link)
• Åke Emil Jeansson; Are Olsen; Tor Eldevik et al. (2011). The Nordic Seas carbon budget: Sources, sinks, and uncertainties. (external link)
• Nathalie Lefévre; Andrew Watson; Are Olsen et al. (2004). A decrease in the sink for atmospheric CO2 in the North Atlantic. (external link)
• Sara Jutterström; Leif Gunnar Anderson; Nicholas R. Bates et al. (2010). Arctic Ocean data in CARINA. (external link)
• Siv Kari Lauvset; Wade R. McGills; Ludovic Bariteau et al. (2011). Direct measurements of CO2 flux in the Greenland Sea. (external link)
• Helle Augdal Botnen; Abdirahman Omar; Ivar Aavatsmark et al. (2013). PVTx Properties of a Two-phase CO2 Jet from Ruptured Pipeline. (external link)
• Richard Bellerby; Are Olsen; Truls Johannessen et al. (2002). A high precision spectrophotometric method for on-line shipboard seawater pH measurements:the automated marine pH sensor (AMpS). (external link)
• Richard Bellerby; Are Olsen; Truls Johannessen et al. (2002). The Automated Marine pH Sensor (AMpS): a high precision continuous spectrophotometric method for seawater pH measurements. (external link)
• Svetlana Milutinovic; Michael J. Behrenfeld; Johnny Andre Johannessen et al. (2009). Sensitivity of remote sensing–derived phytoplankton productivity to mixed layer depth: Lessons from the carbon-based productivity model. (external link)
• Friederike Fröb; Are Olsen; Meike Becker et al. (2019). Wintertime fCO2 variability in the subpolar North Atlantic since 2004. (external link)
• Lisa Ann Miller; Melissa Chierici; Truls Johannessen et al. (1999). Seasonal dissolved inorganic carbon distributions in the Greenland Sea and implications for atmospheric CO2 exchange. (external link)
• Melissa Chierici; Are Olsen; Truls Johannessen et al. (2009). Algorithms to estimate the carbon dioxide uptake in the northern North Atlantic using shipboard observations, satellite and ocean analysis data. (external link)
• C. L. Sabine; S. Hankin; H. Koyuk et al. (2013). Surface Ocean CO2 Atlas (SOCAT) gridded data products. (external link)
• Hilde Kristine Hvidevold; Guttorm Alendal; Truls Johannessen et al. (2015). Layout of CCS monitoring infrastructure with highest probability of detecting a footprint of a CO2 leak in a varying marine environment. (external link)
• Hilde Kristine Hvidevold; Guttorm Alendal; Truls Johannessen et al. (2013). Assessing Model Uncertainties Through Proper Experimental Design. (external link)
• Leif G. Andersson; M. Chierici; Truls Johannessen (1999). Flux of anthropogenic carbon and steady state carbon into the deep Greenland Sea. (external link)
• Are Olsen; Kelly Brown; Melissa Chierici et al. (2008). Sea-surface CO2 fugacity in the subpolar North Atlantic. (external link)
• Are Olsen; Truls Johannessen; Fransisco Rey (2004). On the nature of the factors that control spring bloom development at the entrance to the Barents Sea and their interannual variability. (external link)
• Are Olsen; Abdirahman Omar; Richard Bellerby et al. (2006). Magnitude and origin of the anthroopogenic CO2 increase and 13C Suess effect in the Nordic seas since 1981. (external link)
• Yoshie Kasajima; Anders Olsson; Truls Johannessen et al. (2006). A submesoscale coherent eddy in the Greenland Sea in 2003. (external link)

Media feature article

• Ingunn Skjelvan; Truls Johannessen; Knut Yngve Børsheim (2009). Redd Polarfront!. (external link)

Academic book chapter

• Dorothee C.E. Bakker; Hermann W. Bange; Nicolas Gruber et al. (2014). Air-sea interactions of natural long-lived greenhouse gases (CO2, N2O, CH4)in a changing climate. (external link)
• Abdirahman Omar; Truls Johannessen; Richard Bellerby et al. (2005). Sea-Ice and Brine Formation in Storfjorden: Implications for the Arctic Wintertime Air-Sea CO2 Flux. (external link)
• T.T. Noji; Lisa A. Miller; Ingunn Skjelvan et al. (2000). Constraints on carbon drawdown and export in the Greenland Sea. (external link)
• Ingunn Skjelvan; Are Olsen; Leif Gunnar Anderson et al. (2005). A Review of the Inorganic Carbon Cycle of the Nordic Seas and Barents Sea. (external link)

Letter to the editor

• Ingunn Skjelvan; Truls Johannessen; Knut Yngve Børsheim (2009). Klimaovervaking treng verskipet Polarfront, Tora Aasland!. (external link)
• Yoshie Kasajima; Truls Johannessen (2008). Role of cabbeling in water densification in the Greenland Sea. (external link)

Lecture

• Ingunn Skjelvan; Truls Johannessen (2019). Havforsuringsovervåkningen 2018 - NORCE og Universitetet i Bergen. (external link)
• A.J. Watson; M-J. Messias; E. Fogelqvist et al. (1998). Deep convection studied by a tracer release in the Greenland Sea. (external link)
• Ingunn Skjelvan; Truls Johannessen (2016). Time series of carbon in a changing climate - examples from Station M in the Norwegian Sea. (external link)
• Truls Johannessen (2010). Havets rolle i atmosfærens Co2 utvikling og Havforsuringsproblematikken. (external link)
• Truls Johannessen (2007). Forholdene i havet - viktigere enn vi tror. (external link)
• Melissa Chierici; Ingunn Skjelvan; Marit Norli et al. (2017). Monitoring of Ocean Acidification in Norwgian waters. (external link)
• Agnieszka Beszczynska-Möller; Stein Sandven; Hanne Sagen et al. (2018). Enhancement of in situ observing systems in the Arctic under INTAROS. (external link)

Academic literature review

• Helene Frigstad; Tom Andersen; Dag Olav Hessen et al. (2013). Long-term trends in carbon, nutrients and stoichiometry in Norwegian coastal waters: Evidence of a regime shift. (external link)
• Dorothee C.E. Bakker; Benjamin Pfeil; Camilla Stegen Landa et al. (2016). A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT). (external link)
• Juan José Dañobeitia; Sylvie Pouliquen; Truls Johannessen et al. (2020). Toward a comprehensive and integrated strategy of the European marine research infrastructures for ocean observations. (external link)
• Tobias Steinhoff; Thanos Gkritzalis; Siv Kari Lauvset et al. (2019). Constraining the oceanic uptake and fluxes of greenhouse gases by building an ocean network of certified stations: The ocean component of the Integrated Carbon Observation System, ICOS-Oceans. (external link)

Doctoral thesis (PhD)

• Truls Johannessen (1992). Stable Isotopes as Climatic Indicators in Ocean and Lake Sediments. (external link)
• Hilde Kristine Hvidevold; Guttorm Alendal; Truls Johannessen et al. (2015). Quantifying uncertainties when monitoring marine environments in connection with geological storage of CO2. (external link)

Master’s thesis

• Gisle Nondal; Truls Johannessen (2004). The carbon dioxide system in the Northern North Atlantic: an assessment of the optimal variable combination for Voluntary Observing Ships. (external link)

Non-fiction monograph

• Truls Johannessen; Ingunn Skjelvan; Lisa Miller et al. (1996). pCO2 fluxes in the Nordic Seas. (external link)

Conference abstract

• Edward T. Peltzer; Peter G. Brewer; N. Nakayama et al. (2004). Initial results from a 4 km ocean CO2 release experiment. (external link)

See a complete overview of publications in Cristin.