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)
• Olsen, Are; Rajasakaren, Balamuralli; Jeansson, Emil et al. (2024). In the Wake of Deeper Convection: Nonsteady State Anthropogenic Carbon in the Greenland Sea. (external link)
• Ericson, Ylva; Fransson, Agneta; Chierici, Melissa et al. (2023). Rapid fCO2 rise in the northern Barents Sea and Nansen Basin. (external link)
• Friedlingstein, Pierre; O'Sullivan, Michael; Jones, Matthew W. et al. (2023). Global Carbon Budget 2023. (external link)
• Connelly, D.P.; Bull, J.M.; Flohr, A. et al. (2022). Assuring the integrity of offshore carbon dioxide storage. (external link)
• Lennox, Robert; Junge, Claudia; Reubens, Jan et al. (2022). Strategic importance of the Bergen-Shetland Corridor to marine biology and oceanography of the Atlantic Ocean. (external link)
• Fransner, Sara Filippa Krusmynta; Fröb, Friederike; Tjiputra, Jerry et al. (2022). Acidification of the Nordic Seas. (external link)
• Lichtschlag, Anna; Pearce, Christopher R.; Suominen, Mikael et al. (2021). Suitability analysis and revised strategies for marine environmental carbon capture and storage (CCS) monitoring. (external link)
• Becker, Meike; Olsen, Are; Landschützer, Peter et al. (2021). The northern European shelf as an increasing net sink for CO2. (external link)
• Omar, Abdirahman; García-Ibáñez, Maribel I.; Schaap, Allison et al. (2021). Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method: Results from a recent subsea CO2 release experiment in the North Sea. (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)
• Oleynik, Anna; García-Ibáñez, Maribel I.; Blaser, Nello et al. (2020). Optimal sensors placement for detecting CO2 discharges from unknown locations on the seafloor. (external link)
• Friedlingstein, Pierre; Jones, Matthew W.; O'Sullivan, Michael et al. (2019). Global carbon budget 2019. (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)
• Fröb, Friederike; Olsen, Are; Becker, Meike et al. (2019). Wintertime fCO2 variability in the subpolar North Atlantic since 2004. (external link)
• Omar, Abdirahman; Thomas, Helmuth; Olsen, Are et al. (2019). Trends of Ocean Acidification and pCO2 in the Northern North Sea, 2003-2015. (external link)
• Fröb, Friederike; Olsen, Are; Pérez, Fiz F. et al. (2018). Inorganic Carbon and Water Masses in the Irminger Sea since 1991. (external link)
• Ali, Elsheikh Bashir; Churchill, James H.; Barthel, Knut et al. (2018). Seasonal variations of hydrographic parameters off the Sudanese coast of the Red Sea, 2009-2015. (external link)
• Yasunaka, Sayaka; Siswanto, Eko; Olsen, Are et al. (2018). Arctic Ocean CO2 uptake: An improved multiyear estimate of the air-sea CO2 flux incorporating chlorophyll a concentrations. (external link)
• Alendal, Guttorm; Blackford, Jeremy; Chen, Baixin et al. (2017). Using Bayes theorem to quantify and reduce uncertainties when monitoring varying marine environments for indications of a leak. (external link)
• Andersson, Andreas; Falck, Eva; Sjöblom, Anna et al. (2017). Air-sea gas transfer in high Arctic fjords. (external link)
• Omar, Abdirahman; Skjelvan, Ingunn; Erga, Svein Rune et al. (2016). Aragonite saturation states and pH in western Norwegian fjords: Seasonal cycles and controlling factors, 2005-2009. (external link)
• Quéré, Corinne Le; Andrew, Robbie; Canadell, Josep G. et al. (2016). Global Carbon Budget 2016. (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)
• 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)
• Frigstad, Helene; Henson, Stephanie A.; Hartman, Susan E. et al. (2015). Links between surface productivity and deep ocean particle flux at the Porcupine Abyssal Plain sustained observatory. (external link)
• Burt, William; Thomas, Helmuth; Pätsch, Johannes et al. (2014). Radium isotopes as a tracer of sediment-water column exchange in the North Sea. (external link)
• Quéré, Corinne Le; Peters, Glen Philip; Andres, Robert J. et al. (2014). Global carbon budget 2013. (external link)
• Quéré, C. Le; Peters, Glen Philip; Andres, R.J. et al. (2013). Global carbon budget 2013. (external link)
• Sabine, C. L.; Hankin, S.; Koyuk, H. et al. (2013). Surface Ocean CO2 Atlas (SOCAT) gridded data products. (external link)
• Pfeil, Benjamin; Olsen, Are; Bakker, D. C. E. et al. (2013). A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT). (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)
• Botnen, Helle Augdal; Omar, Abdirahman; Aavatsmark, Ivar et al. (2013). PVTx Properties of a Two-phase CO2 Jet from Ruptured Pipeline. (external link)
• Signorini, Sergio R.; Häkkinen, Sirpa; Gudmundsson, Kristinn et al. (2012). The role of phytoplankton dynamics in the seasonal and interannual variability of carbon in the subpolar North Atlantic - a modeling study. (external link)
• Årthun, Marius; Bellerby, Richard; Omar, Abdirahman et al. (2012). Spatiotemporal variability of air-sea CO2 fluxes in the Barents Sea, as determined from empirical relationships and modeled hydrography. (external link)
• Jeansson, Åke Emil; Olsen, Are; Eldevik, Tor et al. (2011). The Nordic Seas carbon budget: Sources, sinks, and uncertainties. (external link)
• Omar, Abdirahman; Olsen, Are; Johannessen, Truls et al. (2010). Spatiotemporal variations of fCO2 in the North Sea. (external link)
• Olsen, Are; Omar, Abdirahman; Jeansson, Emil et al. (2010). Nordic seas transit time distributions and anthropogenic CO2. (external link)
• Jutterström, Sara; Anderson, Leif Gunnar; Bates, Nicholas R. et al. (2010). Arctic Ocean data in CARINA. (external link)
• Olsen, Are; Key, R.M.; Jeansson, Emil et al. (2009). Overview of the Nordic Seas CARINA data and salinity measurements. (external link)
• Omar, Abdirahman; Olsen, Are; Hoppema, M. et al. (2009). Spatiotemporal variations of fCO2 in the North Sea. (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)
• 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)
• Omar, Abdirahman; Olsen, Are (2006). Reconstructing the time history of the air-sea CO2 disequilibrium and its rate of change in the eastern subpolar North Atlantic, 1972-1989. (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; Omar, Abdirahman; Stuart-Menteth, AC et al. (2004). Diurnal variations of surface ocean pCO(2) and sea-air CO2 flux evaluated using remotely sensed data. (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. (2004). Interannual variability in the wintertime air-sea flux of carbon dioxide in the northern North Atlantic, 1981-2001. (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)
• Omar, Abdirahman; Johannessen, Truls; Kaltin, S.A. et al. (2003). Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water. (external link)
• Erga, Svein Rune; Omar, Abdirahman; Singstad, Ingar et al. (1999). An optical detection system for the study of fine scale vertical displacement of microalgae in an artificial water column. (external link)

Poster

• Lauvset, Siv Kari; Platt, Stephen Matthew; Lange, Holger et al. (2024). ICOS-NORWAY – A TOOL TO VERIFY NORWEGIAN GREENHOUSE GAS REDUCTIONS. (external link)
• Omar, Abdirahman; Skjelvan, Ingunn (2023). Coastal biogeochemical time series in southwestern Norway. (external link)
• Alendal, Guttorm; Dankel, Dorothy Jane; Fagerås, Bjarte et al. (2023). Assurance offshore CO2 monitoring, a cross-disciplinary approach.. (external link)
• Omar, Abdirahman; Skjelvan, Ingunn (2021). Coastal CO2 dynamics in southwestern Norway. (external link)
• Ericson, Ylva; Fransson, Agneta; Chierici, Melissa et al. (2021). Spatiotemporal variability of the surface water aragonite saturation state in the western Barents Sea. (external link)
• Omar, Abdirahman; Garcia-Ibanez, Maribel; Alendal, Guttorm (2018). The stoichiometric Cseep method as a tool to distinguish CO2 seepage signal from natural variability. (external link)
• Garcia-Ibanez, Maribel; Omar, Abdirahman; Alendal, Guttorm et al. (2018). THE STOICHIOMETRIC ΔCSEEP METHOD AS A MONITORING TOOL FOR DETECTION OF CO2 LEAKAGE FROM SUBSEA STORAGE SITES. (external link)
• García-Ibáñez, María Isabel; Omar, Abdirahman; Johannessen, Truls (2017). Geochemical monitoring for detection of CO2 leakage from subsea storage sites. (external link)
• Alendal, Guttorm; Blackford, Jeremy; Chen, Baixin et al. (2017). Bayes’ theorem as the fundament to design monitoring programs.. (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)
• Becker, Meike; Olsen, Are; Bastani, Arian et al. (2017). Surface ocean pCO2 maps along the Norwegian coast-A regional optimization of global pCO2 maps. (external link)
• Fröb, Friederike; Olsen, Are; Becker, Meike et al. (2017). Impact of North Atlantic freshening on sea surface fCO2. (external link)
• Alendal, Guttorm; Blackford, Jeremy; Chen, Baixin et al. (2016). Using Bayes Theorem to Quantify and Reduce Uncertainties when Monitoring Varying Marine Environments for Indications of a Leak. (external link)
• Alendal, Guttorm; Blackford, Jeremy; Chen, Baixin et al. (2016). Bayes’ theorem as the fundament to design monitoring programs.. (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)
• Botnen, Helle Augdal; Omar, Abdirahman; Aavatsmark, Ivar et al. (2012). PVTx properties of a two-phase Co2 jet from ruptured pipeline. (external link)
• Signorini, S.; Häkkinen, S.; Olsen, Are et al. (2011). Trends in the subpolar North Atlantic carbon sink and ocean acidification: 1981-2008. (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)
• Jeansson, Emil; Olsen, Are; Eldevik, Tor et al. (2009). Transports, budget and variability of inorganic carbon in the Nordic Seas. (external link)
• Olsen, Are; Omar, Abdirahman; Jeansson, Emil et al. (2009). Nordic Seas Anthropogenic CO2. (external link)
• Olsen, Are; Omar, Abdirahman; Jeansson, Emil et al. (2009). Nordic Seas transit-time distributions and anthopogenic CO2. (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)
• 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)
• 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)
• Omar, Abdirahman (2007). Air-sea CO2 flux variability in marginal seas bordering Norway: Barents Sea and North Sea. (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)
• 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)
• Olsen, Are; Bellerby, Richard; Haugan, Peter M. et al. (2004). Bjerknes activity 8: Ocean carbon cycle and biogeochemistry. (external link)
• Olsen, Are; Omar, Abdirahman (2004). Diurnal variations of surface ocean pCO2 and sea-air CO2 flux evaluated using remotely sensed data. (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; Omar, Abdirahman; Stuart-Menteth, A. et al. (2004). Diurnal variations of surface ocean pCO2 and sea-air CO2 flux evaluated using remotely sensed data. (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). Chemical characterisation of waters in Storfjorden. (external link)
• Omar, Abdirahman; Johannessen, Truls (2000). Potential Brine Water Sources in Storfjorden. (external link)

Academic lecture

• Ericson, Ylva; Fransson, Agneta; Chierici, Melissa et al. (2023). Rapid fCO2 rise in the northern Barents Sea and Nansen Basin. (external link)
• Gasda, Sarah Eileen; Oleynik, Anna; Tveit, Svenn et al. (2023). ACTOM Decision Support Tool for offshore environmental monitoring: Smeaheia region case study, Norwegian North Sea. (external link)
• Alendal, Guttorm; Schütz, Sigrid Eskeland; Oleynik, Anna et al. (2022). ACT on Marine Monitoring, project presentation. (external link)
• Omar, Abdirahman (2021). Detection and quantification of CO2 seepage in seawater using the stoichiometric Cseep method. (external link)
• Omar, Abdirahman (2021). CO2 i sjøvann: Miljøstatistikk og utfordringer knyttet til å oppdage lekkasje. (external link)
• Becker, Meike; Olsen, Are; Landschützer, Peter et al. (2021). The northern European shelf as increasing net sink for CO2. (external link)
• Alendal, Guttorm; Oleynik, Anna; Dankel, Dorothy Jane et al. (2020). Monitoring offshore CO2 storage projects, aligning capabilities with regulations and public expectations.. (external link)
• Omar, Abdirahman; Carpentier, Stefan (2020). Act on Offshore Monitoring (ACTOM). Monitoring offshore CCS. CCS regulatory framework.. (external link)
• Omar, Abdirahman (2020). The Cseep method as a monitoring tool to detect and quantify CO2 seepage.. (external link)
• Omar, Abdirahman; Garcia-Ibanez, Maribel; Oleynik, Anna (2019). Utility of the Cseep method in the vicinity of Goldeneye.. (external link)
• Omar, Abdirahman (2019). The stoichiometric Cseep method as a tool to detect CO2 seepage from subsea CO2 storage in the North Sea: potential role of ICOS data.. (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)
• Blackford, Jerry; Alendal, Guttorm; Artioli, Yuri et al. (2018). Ensuring efficient and robust offshore storage – the role of marine system modelling. (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)
• 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)
• Jeansson, E; Olsen, Are; Eldevik, Tor et al. (2012). A carbon budget for the Nordic Seas. (external link)
• Omar, Abdirahman (2012). Multi-sensor platform for monitoring CO2 seepage in marine sediment /benthic boundary layer and overlying water column. (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)
• Smedsrud, Lars Henrik; Ingvaldsen, Randi; Esau, Igor et al. (2012). The role of the Barents Sea in the climate system. (external link)
• Johannessen, Truls; Omar, Abdirahman; Reigstad, Laila Johanne et al. (2012). Status WP5: The Marine Component. (external link)
• Bellerby, Richard; Tjiputra, Jerry; Silyakova, Anna et al. (2012). North Atlantic and Arctic Ocean carbon biogeochemical responses and feedbacks to climate change. (external link)
• Dokken, Trond Martin; Omar, Abdirahman; Li, Camille (2012). Benthic S18O signature of dense brine from sea ice formation in the North Atlantic. (external link)
• Omar, Abdirahman; Olsen, Are; Johannessen, Truls et al. (2011). Spatiotemporal variations of fCO2 in the North Sea. (external link)
• Signorini, S.; Häkkinen, S.; Olsen, Are et al. (2011). Trends in the subpolar North Atlantic carbon sink and ocean acidification: 1981-2008. (external link)
• Olsen, Are; Omar, Abdirahman; Jeansson, Emil et al. (2010). Anthropogenic carbon and ocean acidification in the Nordic Seas. (external link)
• Jeansson, Emil; Olsen, Are; Eldevik, Tor et al. (2010). The Nordic Seas Carbon Budget: Sources, Sinks And Uncertainties. (external link)
• Omar, Abdirahman; Johannessen, Truls; Haugan, Peter M. (2010). Konsekvenser av CO2 lekkasje. (external link)
• Olsen, Are; Omar, Abdirahman; Jeansson, Emil et al. (2010). Nordic Seas anthropogenic CO2, evaluation of methods and distribution. (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 (2010). Carbon uptake and acidification in high latitude NA:the decisive role of air-sea CO2 disequilibrium. (external link)
• Omar, Abdirahman; Johannessen, Truls (2010). CO2 storage sites in the North Sea Overview: WP Water Column. (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)
• Olsen, Are; Bellerby, Richard; Johannessen, Truls et al. (2009). Havforsuring - utvikling og prognoser for norske farvann. (external link)
• Omar, Abdirahman; Are, Olsen; Truls, Johannessen et al. (2008). fCO2 variability in the North Sea. (external link)
• Omar, Abdirahman; Are, Olsen; Truls, Johannessen et al. (2008). Spetio-temporal fCO2 variability in the North Sea. (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)
• 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; Omar, Abdirahman; Bellerby, Richard et al. (2006). Carbon changes in the high latitude North Atlantic. (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)
• Omar, Abdirahman (2005). pCO2 measurements from voluntary observing ships (VOS): the scientific aspect. (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)
• Omar, Abdirahman (2005). Ny kunnskap om havets respons til utslipp av menneskeskapt (antropogent) karbon. (external link)
• Olsen, Are; Skjelvan, Ingunn; Omar, Abdirahman et al. (2005). Establishing a northen North Atlantic CO2 observing network. (external link)
• Bellerby, Richard; Heinze, Christoph; Kivimæe, Caroline et al. (2005). Ocean carbon cycle and biogeochemistry. (external link)
• Omar, Abdirahman (2003). Brine formation as a pathway for carbon to the deep ocean. (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)
• Olsen, Are; Bellerby, Richard; Johannessen, Truls et al. (2002). Instumentation for in Situ and Autonomous Monitoring of the Marine Carbon Dioxide System. (external link)
• Johannessen, Truls; Bellerby, Richard; Jansen, Eystein et al. (2001). The Greenland Sea Experiment. (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)
• 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)
• 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; Andersson, Leif G.; Bellerby, Richard et al. (2000). The Carbon cycle in the Nordic Seas, a perspective. (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)
• Omar, Abdirahman; Johannessen, Truls (2000). Potential brine water sources in Storfjord. (external link)
• Skjelvan, Ingunn; Johannessen, Truls; Omar, Abdirahman (2000). fCO2 variations and fCO2 calculations in the Greenland Sea surface water. (external link)

Report

• Schütz, Sigrid Eskeland; Omar, Abdirahman (2023). Report on regulations and technological capabilities for monitoring CO2 storage sites.. (external link)
• Jones, Elizabeth Marie; Skjelvan, Ingunn; Frigstad, Helene et al. (2022). Monitoring ocean acidification in Norwegian seas in 2021 - selected results. (external link)
• Skjelvan, Ingunn; Jeansson, Emil; Chierici, Melissa et al. (2022). Trender i havforsuring og antropogent karbon i de nordiske hav, Nordsjøen og Skagerrak. (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)
• Skjelvan, Ingunn; Jones, Elizabeth Marie; Chierici, Melissa et al. (2021). Monitoring ocean acidification in Norwegian seas in 2020. (external link)
• Schütz, Sigrid Eskeland; Omar, Abdirahman; Carpentier, Stefan (2021). Report on regulations and technological capabilities for monitoring CO2 storage sites. ACTOM project report. Version 1.0. (external link)
• Omar, Abdirahman; Garcia-Ibanez, Maribel; Oleynik, Anna et al. (2019). Underpinning data for monitoring activities (including current statistics and carbon tracer quantifications). (external link)
• Omar, Abdirahman (2019). Determination of seepage CO2 dissolved in seawater using the Cseep method. (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)
• 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)
• Esau, Igor; Davy, Richard; Smedsrud, Lars H. et al. (2018). BASIC:-Boundary Layers in the Arctic Atmosphere, Seas and Ice Dynamics - SKD Strategic Project January 2015 – December 2017. (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)
• 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)
• Chierici, Melissa; Skjelvan, Ingunn; Norli, Marit et al. (2016). Overvåking av havforsuring i norske farvann i 2015. (external link)
• Skjelvan, Ingunn; Chierici, Melissa; Sørensen, Kai et al. (2016). Havforsuring i vestlandsfjorder og CO2-variabilitet i Lofoten. (external link)
• Skjelvan, Ingunn; Omar, Abdirahman (2015). Kunnskapsstatus for havforsuring i fjorder langs Vestlandskysten. (external link)
• Aall, Carlo; Omar, Abdirahman; Børsheim, Knut Yngve et al. (2015). Havforsuring og sjømatnæringen på Vestlandet: Kunnskapsstatus og handlingsrom Rapport fra et forprosjekt. (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)
• 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)
• Skjelvan, Ingunn; Olsen, Are; Omar, Abdirahman et al. (2013). Rapport fra arbeidet med å oppdatere havforsuringsdelen av Forvaltningsplanen for Norskehavet. (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)
• Omar, Abdirahman (2009). Internrapport: Rapport nr R32 Theoretical discription and empirical evaluation of a water degasser developed by Akvator AS. (external link)

Article in business/trade/industry journal

• Alendal, Guttorm; Gasda, Sarah Eileen; Romanak, Katherine et al. (2022). The Impact of Pre-Project Data Quality and Quantity on Developing Environmental Monitoring Strategies for Offshore Carbon Storage: Case Studies from the Gulf of Mexico and the North Sea.. (external link)
• Dewar, Marius; Alendal, Guttorm; Blackford, Jeremy et al. (2022). Demonstration of a Semi-Automated Decision Support Toolbox to Aid Operators in the Design of Efficient Environmental Offshore Monitoring Programs for Co2 Storage Sites. (external link)

Academic literature review

• Wanninkhof, Rik; Pickers, Penelope A.; Omar, Abdirahman et al. (2019). A surface ocean CO2 reference network, SOCONET and associated marine boundary layer CO2 measurements. (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)
• Smedsrud, Lars Henrik; Esau, Igor; Ingvaldsen, Randi et al. (2013). The role of the Barents Sea in the arctic climate system. (external link)

Interview

• Omar, Abdirahman (2019). Video intervju about the H2020 SEACRIFOG project.. (external link)
• Omar, Abdirahman (2015). Tracing subsea CO2 leakag. (external link)
• Reigstad, Laila Johanne; Omar, Abdirahman (2013). Focus on the Seabed; monitoring of water column and sediments. (external link)

Lecture

• Skjelvan, Ingunn; Becker, Meike; Omar, Abdirahman et al. (2018). ICOS data used for Ocean acidification research. (external link)
• Omar, Abdirahman (2015). Monitoring of varying marine environment: detection method and survey strategies. (external link)
• Omar, Abdirahman (2015). Marine environmental monitoring. (external link)
• Omar, Abdirahman (2014). Marine Monitoring -Carbon-based tracers early detection of CO2 leakage. (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)
• 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)
• 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)

Popular scientific article

• Omar, Abdirahman; Skjelvan, Ingunn; Olsen, Are (2009). Forsuring påvist i havene rundt Norge. (external link)
• Olsen, Are; Omar, Abdirahman; Skjelvan, Ingunn et al. (2008). The Bjerknes Centre pCO2 observing network. (external link)

Doctoral dissertation

• Omar, Abdirahman (2003). Carbon dioxide in northern high latitude oceans: anthropogenic increase and air-sea flux variability. (external link)

See a complete overview of publications in Cristin.