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

Academic article

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

Academic lecture

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

Report

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

Poster

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

Academic literature review

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

Lecture

• Skjelvan, Ingunn; Johannessen, Truls (2019). Havforsuringsovervåkningen 2018 - NORCE og Universitetet i Bergen. (external link)
• Beszczynska-Möller, Agnieszka; Sandven, Stein; Sagen, Hanne et al. (2018). Enhancement of in situ observing systems in the Arctic under INTAROS. (external link)
• Chierici, Melissa; Skjelvan, Ingunn; Norli, Marit et al. (2017). Monitoring of Ocean Acidification in Norwgian waters. (external link)
• Skjelvan, Ingunn; Johannessen, Truls (2016). Time series of carbon in a changing climate - examples from Station M in the Norwegian Sea. (external link)

Doctoral dissertation

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

Academic chapter/article/Conference paper

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

Interview

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

Popular scientific lecture

• Johannessen, Truls (2010). Havets rolle i atmosfærens Co2 utvikling og Havforsuringsproblematikken. (external link)
• Johannessen, Truls (2007). Forholdene i havet - viktigere enn vi tror. (external link)
• Watson, A.J.; Messias, M-J.; Fogelqvist, E. et al. (1998). Deep convection studied by a tracer release in the Greenland Sea. (external link)

Reader opinion piece

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

Feature article

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

Popular scientific article

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

Book Translation

• Skjelvan, Ingunn; Falck, Eva; Johannessen, Truls et al. (2007). What we know, what we do not know, and how we try to better understand global change. (external link)

Abstract

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

Thesis at a second degree level

• Nondal, Gisle; Johannessen, Truls (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 book

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

See a complete overview of publications in Cristin.