Browsing NORCE vitenarkiv by Author "Omar, Abdirahman"

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    • A surface ocean CO2 reference network, SOCONET and associated marine boundary layer CO2 measurements 

      Wanninkhof, Rik; Pickers, Penelope A.; Omar, Abdirahman; Sutton, Adrienne; Murata, Akihiko; Olsen, Are; Stephens, Britton B.; Tilbrook, Bronte; Munro, David; Pierrot, Denis; Rehder, Gregor; Santana-Casiano, J. Magdalena; Müller, Jens D.; Trinanes, Joaquin; Tedesco, Kathy; O'Brien, Kevin; Currie, Kim; Barbero, Leticia; Telszewski, Maciej; Hoppema, Mario; Ishii, Masao; González-Dávila, Melchor; Bates, Nicholas R.; Metzl, Nicolas; Suntharalingam, Parvadha; Feely, Richard A.; Nakaoka, Shin-ichiro; Lauvset, Siv Kari; Takahashi, Taro; Steinhoff, Tobias; Schuster, Ute (Peer reviewed; Journal article, 2019)
      The Surface Ocean CO2 NETwork (SOCONET) and atmospheric Marine Boundary Layer (MBL) CO2 measurements from ships and buoys focus on the operational aspects of measurements of CO2 in both the ocean surface and atmospheric ...

    • Acidification of the Nordic Seas 

      Fransner, Sara Filippa Krusmynta; Fröb, Friederike; Tjiputra, Jerry; Goris, Nadine; Lauvset, Siv Kari; Skjelvan, Ingunn; Jeansson, Emil; Omar, Abdirahman; Chierici, Melissa; Jones, Elizabeth Marie; Fransson, Agneta; Ólafsdóttir, Sólveig R.; Johannessen, Truls; Olsen, Are (Journal article; Peer reviewed, 2022)
      Due to low calcium carbonate saturation states, and winter mixing that brings anthropogenic carbon to the deep ocean, the Nordic Seas and their cold-water corals are vulnerable to ocean acidification. Here, we present a ...

    • Assuring the integrity of offshore carbon dioxide storage 

      Connelly, D.P.; Bull, J.M.; Flohr, A.; Schaap, A.; Koopmans, D.; Blackford, J.C.; White, P.R.; James, R.H.; Pearce, C.; Lichtschlag, A.; Achterberg, E.P.; de Beer, D; Roche, B.; Li, J.; Saw, K.; Alendal, Guttorm; Avlesen, Helge; Brown, R.; Borisov, S.M.; Böttner, C.; Cazenave, P.W.; Chen, B.; Dale, A.W.; Dean, M.; Dewar, M.; Esposito, M.; Gros, J.; Hanz, R.; Haeckel, M.; Hosking, B.; Huvenne, V.; Karstens, Jens; Le Bas, T.; Leighton, T.G.; Linke, P.; Loucaides, S.; Matter, J.M.; Monk, S.; Mowlem, M.C.; Oleynik, Anna; Omar, Abdirahman; Peel, K.; Provenzano, G.; Saleem, U.; Schmidt, M.; Schramm, B.; Sommer, S.; Strong, J.; Suarez, I. Falcon; Ungerboeck, B.; Widdicombe, S.; Wright, H.; Yakushev, Evgeniy (Peer reviewed; Journal article, 2022)
      Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore storage can provide up to 13% of the global CO2 reduction required to achieve the Intergovernmental ...

    • 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 

      Steinhoff, Tobias; Gkritzalis, Thanos; Lauvset, Siv Kari; Jones, Stephen Daniel; Schuster, Ute; Olsen, Are; Becker, Meike; Bozzano, Roberto; Brunetti, Fabio; Cantoni, Carolina; Cardin, Vanessa; Diverrès, Denis; Fiedler, Björn; Fransson, Agneta; Giani, Michele; Hartman, Sue; Hoppema, Mario; Jeansson, Emil; Johannessen, Truls; Kitidis, Vassilis; Körtzinger, Arne; Landa, Camilla Stegen; Lefèvre, Nathalie; Luchetta, Anna; Naudts, Lieven; Nightingale, Philip D.; Omar, Abdirahman; Pensieri, Sara; Pfeil, Benjamin; Castano Primo, Rocio; Rehder, Gregor; Rutgersson, Anna; Sanders, Richard; Schewe, Ingo; Siena, Giuseppe; Skjelvan, Ingunn; Soltwedel, Thomas; van Heuven, Steven; Watson, Andrew (Peer reviewed; Journal article, 2019)
      The European Research Infrastructure Consortium “Integrated Carbon Observation System” (ICOS) aims at delivering high quality greenhouse gas (GHG) observations and derived data products (e.g., regional GHG-flux maps) for ...

    • 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 

      Omar, Abdirahman; García-Ibáñez, Maribel I.; Schaap, Allison; Oleynik, Anna; Esposito, Mario; Jeansson, Emil; Loucaides, Socratis; Thomas, Helmuth; Alendal, Guttorm (Peer reviewed; Journal article, 2021)
      Carbon Capture and Storage (CCS) is a potential significant mitigation strategy to combat climate change and ocean acidification. The technology is well understood but its current implementation must be scaled up nearly ...

    • Global carbon budget 2019 

      Friedlingstein, Pierre; Jones, Matthew W.; O'Sullivan, Michael; Andrew, Robbie; Hauck, Judith; Peters, Glen Philip; Peters, Wouter; Pongratz, Julia; Sitch, Stephen; Le Quéré, Corinne; Bakker, Dorothée C.E.; Canadell, Josep G.; Ciais, Philippe; Jackson, Robert B.; Anthoni, Peter; Barbero, Leticia; Bastos, Ana; Bastrikov, Vladislav; Becker, Meike; Bopp, Laurent; Buitenhuis, Erik; Chandra, Naveen; Chevallier, Frédéric; Chini, Louise P.; Currie, Kim I.; Feely, Richard A.; Gehlen, Marion; Gilfillan, Dennis; Gkritzalis, Thanos; Goll, Daniel S.; Gruber, Nicolas; Gutekunst, Sören; Harris, Ian; Haverd, Vanessa; Houghton, Richard A.; Hurtt, George; Ilyina, Tatiana; Jain, Atul K.; Joetzjer, Emilie; Kaplan, Jed O.; Kato, Etsushi; Goldewijk, Kees Klein; Korsbakken, Jan Ivar; Landschützer, Peter; Lauvset, Siv Kari; Lefevre, Nathalie; Lenton, Andrew; Lienert, Sebastian; Lombardozzi, Danica; Marland, Gregg; McGuire, Patrick C.; Melton, Joe R.; Metzl, Nicolas; Munro, David R.; Nabel, Julia E.M.S.; Nakaoka, Shin-Ichiro; Neill, Craig; Omar, Abdirahman; Ono, Tsuneo; Peregon, Anna; Pierrot, Denis; Poulter, Benjamin; Rehder, Gregor; Resplandy, Laure; Robertson, Eddy; Rödenbeck, Christian; Séférian, Roland; Schwinger, Jörg; Smith, Naomi; Tans, Pieter P.; Tian, Hanqin; Tilbrook, Bronte; Tubiello, Francesco N.; van der Werf, Guido R.; Wiltshire, Andrew J.; Zaehle, Sönke (Peer reviewed; Journal article, 2019)
      Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere – the “global carbon budget” – is important to better understand the global ...

    • The northern European shelf as an increasing net sink for CO2 

      Becker, Meike; Olsen, Are; Landschützer, Peter; Omar, Abdirahman; Rehder, Gregor; Rödenbeck, Christian; Skjelvan, Ingunn (Peer reviewed; Journal article, 2021)
      We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean fCO2 in the northern European coastal ...

    • Optimal sensors placement for detecting CO2 discharges from unknown locations on the seafloor 

      Oleynik, Anna; García-Ibáñez, Maribel I.; Blaser, Nello; Omar, Abdirahman; Alendal, Guttorm (Peer reviewed; Journal article, 2020)
      Assurance monitoring of the marine environment is a required and intrinsic part of CO2 storage project. To reduce the costs related to the monitoring effort, the monitoring program must be designed with optimal use of ...

    • Sea surface pCO2 variability and air-sea CO2 exchange in the coastal Sudanese Red Sea 

      Ali, Elsheikh B.; Skjelvan, Ingunn; Omar, Abdirahman; Olsen, Are; De Lange, Tor; Johannessen, Truls; Elageed, Salma (Peer reviewed; Journal article, 2021)
      The dynamics of sea surface pCO2 () and air–sea CO2 exchange of the Sudanese coastal Red Sea has for the first time been studied over a full annual cycle (October 2014–October​ 2015) based on semi-continuous measurements ...

    • Trender i havforsuring og antropogent karbon i de nordiske hav, Nordsjøen og Skagerrak 

      Skjelvan, Ingunn; Jeansson, Emil; Chierici, Melissa; Fransnes, Filippa; Fröb, Friedrike; Tjiputra, Jerry; Goris, Nadine; Lauvset, Siv Kari; Omar, Abdirahman; Jones, Elizabeth; Fransson, Agneta; Olafsdóttir, Solveig R.; Johannessen, Truls; Olsen, Are; Norli, Marit; Apelthun, Lise B. (Research report, 2022)
      Denne rapporten baserer seg på artikkelen “Acidification of the Nordic Seas” av Fransner mfl. (2022). I tillegg presenteres havforsuringstrender (=endring over tid) i Nordsjøen og Skagerrak og trender i antropogent karbon ...

    • Trends of Ocean Acidification and pCO2 in the Northern North Sea, 2003-2015 

      Omar, Abdirahman; Thomas, Helmuth; Olsen, Are; Becker, Meike; Skjelvan, Ingunn; Reverdin, Gilles (Peer reviewed; Journal article, 2019)
      For continental shelf regions, the long‐term trend in sea surface carbon dioxide (CO2) partial pressure (pCO2) and rates of ocean acidification are not accurately known. Here, we investigate the decadal trend of observed ...

    • Winter weather controls net influx of atmospheric CO2 on the north-west European shelf 

      Kitidis, Vassilis; Shutler, Jamie D.; Ashton, Ian; Warren, Mark; Brown, Ian; Findlay, Helen S.; Hartman, Sue E.; Sanders, Richard; Humphreys, Matthew P.; Kivimäe, Caroline; Greenwood, Naomi; Hull, Tom; Pearce, David A.; McGrath, Triona; Stewart, Brian A.; Walsham, Pamela; McGovern, Evin; Bozec, Yann; Gac, Jean-Philippe; Van Heuven, Steven M.A.C.; Hoppema, Mario; Schuster, Ute; Johannessen, Truls; Omar, Abdirahman; Lauvset, Siv Kari; Skjelvan, Ingunn; Olsen, Are; Steinhoff, Tobias; Körtzinger, Arne; Becker, Meike; Lefevre, Nathalie; Diverrès, Denis; Gkritzalis, Thanos; Cattrijsse, André; Petersen, Wilhelm; Voynova, Yoana G; Chapron, Bertrand; Grouazel, Antoine; Land, Peter E.; Sharples, Jonathan; Nightingale, Philip D. (Peer reviewed; Journal article, 2019)
      Shelf seas play an important role in the global carbon cycle, absorbing atmospheric carbon dioxide (CO2) and exporting carbon (C) to the open ocean and sediments. The magnitude of these processes is poorly constrained, ...

    • Wintertime fCO2 variability in the subpolar North Atlantic since 2004 

      Fröb, Friederike; Olsen, Are; Becker, Meike; Chafik, Leon Martin; Johannessen, Truls; Reverdin, Gilles; Omar, Abdirahman (Peer reviewed; Journal article, 2019)
      Winter data of surface ocean temperature (SST), salinity (SSS) and CO2 fugacity (fCO2) collected on the VOS M/V Nuka Arctica in the subpolar North Atlantic between 2004 and 2017 are used to establish trends, drivers, and ...