- E-mailTruls.Johannessen@uib.no
- Phone+47 55 58 43 27+47 915 38 169
- Visitor AddressAllégaten 705007 Bergen
- Postal AddressPostboks 78035020 Bergen
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
- (2022). Decadal trends in Ocean Acidification from the Ocean Weather Station M in the Norwegian Sea. Journal of Marine Systems. 1-13.
- (2022). Acidification of the Nordic Seas. Biogeosciences. 979-1012.
- (2021). Sea surface pCO2 variability and air-sea CO2 exchange in the coastal Sudanese Red Sea. Regional Studies in Marine Science. 11 pages.
- (2019). Wintertime fCO2 variability in the subpolar North Atlantic since 2004 . Geophysical Research Letters. 1580-1590.
- (2019). Winter weather controls net influx of atmospheric CO2 on the north-west European shelf. Scientific Reports. 1-11.
- (2019). Trends in anthropogenic carbon in the Arctic Ocean. Progress in Oceanography.
- (2018). Global Carbon Budget 2018. Earth System Science Data. 2141-2194.
- (2018). Global Carbon Budget 2017. Earth System Science Data. 405-448.
- (2017). A global ocean climatology of preindustrial and modern ocean δ13C. Global Biogeochemical Cycles. 515-534.
- (2016). Survey strategies to quantify and optimize detecting probability of a CO<sub>2</sub> seep in a varying marine environment. Environmental Modelling & Software. 303-309.
- (2016). Mapping of the air-sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability. Polar Science. 323-334.
- (2015). The effect of submarine CO2 vents on seawater: Implications for detection of subsea carbon sequestration leakage. Limnology and Oceanography : Methods. 402-410.
- (2015). Layout of CCS monitoring infrastructure with highest probability of detecting a footprint of a CO2 leak in a varying marine environment. International Journal of Greenhouse Gas Control. 274-279.
- (2015). Global carbon budget 2014. Earth System Science Data. 47-85.
- (2014). An update to the Surface Ocean CO2 Atlas (SOCAT version 2). Earth System Science Data. 69-90.
- (2013). Surface Ocean CO2 Atlas (SOCAT) gridded data products. Earth System Science Data.
- (2013). PVTx Properties of a Two-phase CO2 Jet from Ruptured Pipeline. Energy Procedia. 3031-3038.
- (2013). Assessing Model Uncertainties Through Proper Experimental Design. Energy Procedia. 3439-3446.
- (2013). Annual and seasonal fCO(2) and air-sea CO2 fluxes in the Barents Sea. Journal of Marine Systems. 62-74.
- (2013). A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT). Earth System Science Data. 125-143.
- (2012). Assessing model parameter uncertainties for rising velocity of CO2 droplets through experimental design. International Journal of Greenhouse Gas Control. 283-289.
- (2011). The Nordic Seas carbon budget: Sources, sinks, and uncertainties. Global Biogeochemical Cycles. 16 pages.
- (2011). SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy. Energy Procedia. 6117-6124.
- (2011). Direct measurements of CO2 flux in the Greenland Sea. Geophysical Research Letters.
- (2010). Spatiotemporal variations of fCO2 in the North Sea. Ocean Science. 77-89.
- (2010). Recent acceleration of the sea surface fCO2 growth rate in the North Atlantic subpolar gyre (1993–2008) revealed by winter observations. Global Biogeochemical Cycles.
- (2010). Arctic Ocean data in CARINA. Earth System Science Data. 71-78.
- (2010). A carbon budget for the Barents Sea. Deep Sea Research Part I: Oceanographic Research Papers. 1532-1542.
- (2009). Tracking the Variable North Atlantic Sink for Atmospheric CO2. Science. 1391-1393.
- (2009). Sensitivity of remote sensing–derived phytoplankton productivity to mixed layer depth: Lessons from the carbon-based productivity model. Global Biogeochemical Cycles.
- (2009). Role of cabbeling in water densification in the Greenland Basin. Ocean Science. 247-257.
- (2009). Recommendations for autonomous underway pCO(2) measuring systems and data-reduction routines. Deep-Sea Research Part II: Topical Studies in Oceanography. 512-522.
- (2009). Overview of the Nordic Seas CARINA data and salinity measurements. Earth System Science Data.
- (2009). Optimal evaluation of the surface ocean CO2 system in the northern North Atlantic using data from voluntary observing ships. Limnology and Oceanography : Methods. 109-118.
- (2009). Evidence of Greenland Sea water in the Iceland Basin. Geophysical Research Letters.
- (2009). Estimating the monthly pCO2 distribution in the North Atlantic using a self-organizing neural network. Biogeosciences. 1405-1421.
- (2009). Climatological mean and decadal change in surface ocean pCO2, andnet sea–air CO2 flux over the global oceans. Deep-Sea Research Part II: Topical Studies in Oceanography. 554-577.
- (2009). Algorithms to estimate the carbon dioxide uptake in the northern North Atlantic using shipboard observations, satellite and ocean analysis data. Deep-Sea Research Part II: Topical Studies in Oceanography. 630-639.
- (2008). The Greenland Sea tracer experiment 1996–2002: Horizontal mixing and transport of Greenland Sea Intermediate Water. Progress in Oceanography. 85-105.
- (2008). Sea-surface CO2 fugacity in the subpolar North Atlantic. Biogeosciences. 535-547.
- (2008). Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment. Biogeosciences. 1517-1527.
- (2007). Seasonal and interannual variability of the air-seaCO(2) flux in the Atlantic sector of the Barents Sea. Marine Chemistry. 203-213.
- (2007). Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment. Biogeosciences. 4631-4652.
- (2006). Magnitude and origin of the anthroopogenic CO2 increase and 13C Suess effect in the Nordic seas since 1981. Global Biogeochemical Cycles.
- (2006). A submesoscale coherent eddy in the Greenland Sea in 2003. Journal of Geophysical Research (JGR). 19 pages.
- (2005). The effect of wind speed products and wind speed-gas exchange relationships on interannual variability of the air-sea CO2 gas transfer velocity. Tellus B: Chemical and Physical Meteorology. 95-106.
- (2005). Intermediate water from the Greenland Sea in the Faroe Bank Channel: spreading of released sulphur hexafluoride. Deep Sea Research Part I: Oceanographic Research Papers. 279-294.
- (2005). Deep ocean experiments with fossil fuel carbon dioxide: Creation and sensing of a controlled plume at 4 km depth. Journal of Marine Research. 9-33.
- (2004). The OACE (Ocean Abyssal Carbon Experiment) research project. Studies in Surface Science and Catalysis.
- (2004). On the nature of the factors that control spring bloom development at the entrance to the Barents Sea and their interannual variability. Sarsia. 379-393.
- (2004). Intermediate water from the Greenland Sea in the Faroe Bank Channel: spreading of released sulphur hexafluoride. Deep Sea Research Part I: Oceanographic Research Papers. 279-294.
- (2004). Interannual variability in the wintertime air-sea flux of carbon dioxide in the northern North Atlantic, 1981-2001. Deep Sea Research Part I: Oceanographic Research Papers. 1323-1338.
- (2004). Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water. Journal of Geophysical Research (JGR).
- (2004). A decrease in the sink for atmospheric CO2 in the North Atlantic. Geophysical Research Letters. art. no.-L07306.
- (2003). On the nature of the factors that control spring bloom development at the entrance to the Barents Sea, and theri interannual variability. Sarsia. 379-393.
- (2003). Interannual variability in the wintertime air-sea flux of carbon dioxide in the northern North Atlantic, 1981-2001. Deep Sea Research Part I: Oceanographic Research Papers. 1323-1338.
- (2003). Anthropogenic increase of oceanic pCO2 in the Barents Sea surface water. Journal of Geophysical Research (JGR). 3388.
- (2003). A decrease in the sink for atmospheric CO2 in the North Atlantic. Geophysical Research Letters.
- (2002). The impact of climate variations on fluxes of oxygen in the Barents Sea. Continental Shelf Research. 1117-1128.
- (2002). The Automated Marine pH Sensor (AMpS): a high precision continuous spectrophotometric method for seawater pH measurements. Talanta: The International Journal of Pure and Applied Analytical Chemistry. 61-69.
- (2002). Long-lived vortices as a mode of deep ventilation in the Greenland Sea. Nature. 525-527.
- (2002). A high precision spectrophotometric method for on-line shipboard seawater pH measurements:the automated marine pH sensor (AMpS). Talanta: The International Journal of Pure and Applied Analytical Chemistry. 61-69.
- (2000). Flux of anthropogenic carbon and steady state carbon into the deep Greenland Sea. Journal of Geophysical Research (JGR). 14339-14349.
- (2000). Annual carbon fluxes in the upper Greenland Sea based measurements and a box model approach. Tellus B: Chemical and Physical Meteorology. 1013-1024.
- (1999). mixing and convection in the Greenland Sea from a tracer-release experiment. Nature. 902-904.
- (1999). fCO2 variations and air-sea flux of CO2 in the Greenland Sea gyre using high-frequency time-series data from CARIOCA drift buoys. Journal of Geophysical Research (JGR). 20571-20583.
- (1999). Seasonal dissolved inorganic carbon variations in the Greenland Sea and implications for atmospheric CO2 exchange. Deep-Sea Research Part II: Topical Studies in Oceanography. 1473-1496.
- (1999). Seasonal dissolved inorganic carbon distributions in the Greenland Sea and implications for atmospheric CO2 exchange. Deep-Sea Research Part II: Topical Studies in Oceanography. 1473-1496.
- (1999). Mixing and convection in the Greenland Sea from a tracer-release experiment. Nature. 902-904.
- (1999). Interannual variability of fCO2 in the Greenland and Norwegian Seas. Tellus B: Chemical and Physical Meteorology. 477-489.
- (1999). Flux of anthropogenic carbon and steady state carbon into the deep Greenland Sea. Journal of Geophysical Research (JGR).
- (1998). Flux of Anthropogenic and Steady State carbon into the deep Greenland Sea. Journal of Geophysical Research (JGR).
- (1998). Annual vaiability of carbon flux in the upper Greenland Sea, as evaluated from measured data and a box model. Tellus B: Chemical and Physical Meteorology.
- (1995). Briksdalsbreen, western Norway: climatic effects on the terminal response of a temperate glacier between AD 1901 and 1994. The Holocene. side 343-347.
- (2019). Havforsuringsovervåkningen 2018 - NORCE og Universitetet i Bergen.
- (2018). Enhancement of in situ observing systems in the Arctic under INTAROS.
- (2017). Monitoring of Ocean Acidification in Norwgian waters.
- (2016). Time series of carbon in a changing climate - examples from Station M in the Norwegian Sea.
- (2010). Havets rolle i atmosfærens Co2 utvikling og Havforsuringsproblematikken.
- (2007). Forholdene i havet - viktigere enn vi tror.
- (1998). Deep convection studied by a tracer release in the Greenland Sea.
- (2021). Enhancement of in situ observing systems in the Arctic.
- (2018). The need for proper environmental statistics to design adequate monitoring for offshore geological storage of CO2 projects.
- (2017). Surface ocean pCO2 measurements within ICOS Norway and the example of M/V Nuka Arctica.
- (2017). Global ocean climatology of the 13C suess effect and preindustrial δ13C.
- (2014). The inorganic carbon cycle in the Red Sea studied using historical cruise data and five years long coastal time series.
- (2014). Natural δ13C distributions in the global ocean.
- (2014). Global ocean 13C Suess effect and uptake of anthropogenic CO2.
- (2014). Current and planned carbon cycle research at the Bjerknes Centre for Climate Research.
- (2013). Ocean acidification and trends in the Norwegian Sea.
- (2012). WP 5: Detection of potential leakage of injected CO2 and its potential effect on the environment.
- (2012). Status WP5: The Marine Component.
- (2012). Long-term trends in carbon, nutrients and stoichiometry in Norwegian coastal waters: evidence of a regime shift.
- (2012). Long-term changes in carbon and nutrient biogeochemistry in Skagerrak. Bjekrnes Getawai.
- (2012). ICOS, the Norwegian branch.
- (2012). A carbon budget for the Nordic Seas.
- (2011). Spatiotemporal variations of fCO2 in the North Sea.
- (2010). Variability of the North Atlantic sink for atmospheric carbon.
- (2010). The Nordic Seas Carbon Budget: Sources, Sinks And Uncertainties.
- (2010). Sensitivity of satellite-derived phytoplankton productivity to mixed layer depth.
- (2010). Sensitivity of satellite-derived phytoplankton productivity to mixed layer depth.
- (2010). Ocean acidification response to surface ocean conditioning and transport - processes influencing anthropogenic carbon change in the Arctic and Southern oceans.
- (2010). Konsekvenser av CO2 lekkasje.
- (2010). CO2 storage sites in the North Sea Overview: WP Water Column.
- (2009). What parameters should be measured in the water column during a baseline study?
- (2009). North Atlantic relationships between surface fCO2 and hydrography, evaluated using fCO2-SST relationships.
- (2009). Marine carbon measurement techniques.
- (2009). Havforsuring - utvikling og prognoser for norske farvann.
- (2009). Air-sea CO2 flux in the North Atlantic in 2004 through 2006 estimated by the neural network.
- (2008). Recent changes in the Greenland Sea: Tracers and Hydrography.
- (2007). Surface Ocean CO2 Variability and Vulnerabilities: The Arctic Ocean and Nordic Seas.
- (2006). Towards North Atlantic subpolar gyre pCO2 algoritms.
- (2006). The anthropogenic CO2 increase and 13C Suess effect in the northern North Atlantic.
- (2006). Mixing and Transport in the Greenland Sea for the 1996-2003 Period From a Tracer Experiment.
- (2006). Carbon changes in the high latitude North Atlantic.
- (2006). Air-sea CO2 flux variability in the North Sea: 19 months of observations from voluntry observing ships.
- (2005). Sea Ice brinbe formation in Storfjorden: implications for the Arctic winter time air-sea CO2 flux.
- (2005). Establishing a northen North Atlantic CO2 observing network.
- (2004). The potential role of submesoscale coherent vortices in vertical transport in the Greenland Sea.
- (2004). Ocean Abyssal Carbon Experiments at 0.7 and 4 km depth.
- (2004). Internal forcing in the Nordic Seas and pathways to the overflows.
- (2003). Progress of COSMOS (CO2 sending method for ocean storage) and OACE (Ocean abyssal carbon experiment).
- (2003). Changes in modes of ocean carbon cycling from past to present - what can this tell about the future.
- (2002). The role of convection and seasonal to interannual variability on carbon uptake in the Nordic Seas, Ocean Sciences Meeting.
- (2002). Resolved and parameterized convective eddies in the Greenland Sea.
- (2002). Measuring the sink for carbon dioxide in the North Atlantic from ships of oppportunity: the CAVASSOO project.
- (2002). Long-lived vortices as a mode of deep ventilation in the Greenland Sea.
- (2002). Instumentation for in Situ and Autonomous Monitoring of the Marine Carbon Dioxide System.
- (2002). Convective Submesoscale Coherent Vortices in the Greenland Sea.
- (2002). Circulation in the Nordic Seas and Contribution to the Scotland-Froe-Iceland-Greenland Ridge System Overflow from Five Years Observation of a Tracer Release in the Greenland Sea.
- (2001). The role of convection and seasonal to interannual variability on carbon uptake in the Nordic seas.
- (2001). The effect of physical forcing on food web dyamics at the entrance to the Barents Sea.
- (2001). The Greenland Sea Experiment.
- (2001). Ocean pathways as seen by tracers and transport of carbon in the Nordic Seas.
- (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".
- (2001). Can cold brine formation intensify the oceanic uptake of atmospheric CO2?
- (2000). fCO2 variations and fCO2 calculations in the Greenland Sea surface water.
- (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.
- (2000). Time series from the Fugløy-Bjørnøy section. A study of the interannual to annual change in the carbon variables.
- (2000). The carbon cycle in the Nordic Seas, A synthesis done during the CARDEEP era.
- (2000). The Greenland Sea tracer experiment.
- (2000). The Carbon cycle in the Nordic Seas, a perspective.
- (2000). The Carbon Cycle in the Greenland Sea.
- (2000). Spectrophotometric seawater pH in the Weddell and Norwegian Seas: A new tool for monitoring carbon uptake by the ocean.
- (2000). Shining new light on marine carbon dioxide.
- (2000). Potential brine water sources in Storfjord.
- (2000). Interannual variability in the Greenland and Norwegian Seas.
- (2000). Development of a deep water pH sensor for the COSMOS.
- (2000). Biogeochemical Constraints on Carbon Drawdown and Export in the Greenland Sea.
- (1998). pCO2 variations and air-sea flux of CO2 in the Greenland Sea using high-frequency time-series data from CARIOCA drift-buoys.
- (1998). Time series of pCO2, SST and fluorescence data measured by Carioca Buoys drifting in the Greenland Sea between August 1996 and April 1997.
- (1998). The Greenland Sea Experiment.
- (1998). Study of Vertical Mixing Processes in the Greenland Sea Using Tracer Release Results.
- (1998). Horizontal Evolution and Distribution of SF6L Tracer: Greenland Sea Central Byre July 1996-May 1997.
- (1998). European subpolar ocean programme, phase 2: The thermohaline circulation in The Greenland Sea.
- (1998). Annual variability of carbon flux in the upper Greenland Sea, as evaluated from measured data and box model.
- (1998). A Tracer Release to Study Thermohaline Processes in the Greenland Sea.
- (1997). fCO2 in the Nordic Sea.
- (1997). fCO2 in the Nordic Sea.
- (1997). Tracer release experiments in the Greenland Sea simulated in an OGCM.
- (1997). Thermohaline circulation in the Greenland Sea and carbon transport.
- (1997). Thermohaline circulation in the Greenland Sea and carbon transport.
- (1997). The Grennland Sea Experiment. Contribution from the ESOP2 scientific team- MAST III-programme.
- (1997). The Greenland Sea Experiment. Contribution from the ESOP2 scientific team (MAST III-programme).
- (1997). Studies of vertical and horisontal mixing processes in the Greenland Sea based upon the SF6 tracer release experiment.
- (1997). Seasonal variability in dissolved inorganic carbon distribution in the Greenland Sea.
- (1997). Carbon Isotopes and The Carbon Cycle in the Greenland Sea.
- (1997). A tracer release to study the thermohaline circulation of the Greenland Sea.
- (1997). A study of diacpycnal mixing and winter convection in the open ocean: the Greenland Sea Tracer Release Experiment - ESOP 2.
- (2008). The Bjerknes Centre pCO2 observing network. Solas News. 26-27.
- (2004). Spredning av SF6 i Grønlandshavet. Cicerone. 21-24.
- (2001). Havklimaets betydning for biologisk produksjon: En flerårs studie fra Fugløya-Bjørnøyasnittet. Program for Skolelab. for realfag. 13-18.
- (2009). Redd Polarfront! Bergens Tidende.
- (2015). Quantifying uncertainties when monitoring marine environments in connection with geological storage of CO2.
- (1992). Stable Isotopes as Climatic Indicators in Ocean and Lake Sediments.
- (2009). Nå har verdenshavene nådd et metningspunkt.
- (2009). Klimaendringer minker havets evne til å stoppe klimaendringer.
- (2009). Havet tar opp mindre CO2.
- (2009). Havet tar opp mindre CO2.
- (2009). Havet sluker mindre CO2.
- (2009). Havet sluker mindre CO2.
- (2009). Havet mettet på CO2.
- (2009). Havet mettet på CO2.
- (2009). Havet mettet på CO2.
- (2009). Havet mettet på CO2.
- (2009). CO2-stans i havet.
- (2007). Dramatisk endring i havets CO2-opptak.
- (2003). Tar pulsen på klimasystemet.
- (2002). "Bjerknesforskeres funn forklarer dypvannsdannelse - ny artikkel i Nature".
- (2014). Air-sea interactions of natural long-lived greenhouse gases (CO2, N2O, CH4)in a changing climate. 57 pages.
- (2005). Sea-Ice and Brine Formation in Storfjorden: Implications for the Arctic Wintertime Air-Sea CO2 Flux. 12 pages.
- (2005). A Review of the Inorganic Carbon Cycle of the Nordic Seas and Barents Sea. 20 pages.
- (2003). Deep water sequestration of CO2 through formation of brine-enriched shwlf water: an Arctic continental shelf pump.
- (2000). Constraints on carbon drawdown and export in the Greenland Sea. 14 pages.
- (2004). Initial results from a 4 km ocean CO2 release experiment. Abstract of Papers of the American Chemical Society.
- (2007). What we know, what we do not know, and how we try to better understand global change.
- (2020). Toward a comprehensive and integrated strategy of the European marine research infrastructures for ocean observations. Frontiers in Marine Science. 1-8.
- (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. Frontiers in Marine Science. 1-15.
- (2016). A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT). Earth System Science Data. 383-413.
- (2013). Long-term trends in carbon, nutrients and stoichiometry in Norwegian coastal waters: Evidence of a regime shift. Progress in Oceanography. 113-124.
More information in national current research information system (CRIStin)