• A multi-decadal record of oceanographic changes of the past ~165 years (1850-2015 AD) from Northwest of Iceland 

      Simon, Margit Hildegard; Muschitiello, Francesco; Tisserand, Amandine Aline; Olsen, Are; Moros, Matthias; Perner, Kerstin; Bårdsnes, Siv Tone; Dokken, Trond Martin; Jansen, Eystein (Journal article; Peer reviewed, 2020)
      Extending oceanographic data beyond the instrumental period is highly needed to better characterize and understand multi-decadal to centennial natural ocean variability. Here, a stable isotope record at unprecedented ...
    • A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT) 

      Bakker, Dorothee C.E.; Pfeil, Benjamin; Landa, Camilla Stegen; Metzl, Nicolas; O'Brien, Kevin M.; Olsen, Are; Smith, Karl; Cosca, Cathy; Harasawa, Sumiko; Jones, Stephen Daniel; Nakaoka, Shin-Ichiro; Nojiri, Yukihiro; Schuster, Ute; Steinhoff, Tobias; Sweeney, Colm; Takahashi, Taro; Tilbrook, Bronte; Wada, Chisato; Wanninkhof, Rik; Alin, Simone R.; Balestrini, Carlos F.; Barbero, Leticia; Bates, Nicholas R.; Bianchi, Alejandro A.; Bonou, Frédéric; Boutin, Jacqueline; Bozec, Yann; Burger, Eugene F.; Cai, Wei-Jun; Castle, Robert D.; Chen, Liqi; Chierici, Melissa; Currie, Kim; Evans, Wiley; Featherstone, Charles; Feely, Richard A.; Fransson, Agneta Ingrid; Goyet, Catherine; Greenwood, Naomi; Gregor, Luke; Hankin, Steven; Hardman-Mountford, Nick J.; Harlay, Jérôme; Hauck, Judith; Hoppema, Mario; Humphreys, Matthew P.; Hunt, Christopher W.; Huss, Betty; Ibanhez, J. Severino P.; Johannessen, Truls; Keeling, Ralph; Kitidis, Vassilis; Körtzinger, Arne; Kozyr, Alex; Krasakopoulou, Evangelia; Kuwata, Akira; Landschützer, Peter; Lauvset, Siv Kari; Lefevre, Nathalie; Lo Monaco, Claire; Manke, Ansley; Mathis, Jeremy T.; Merlivat, Liliane; Millero, Frank J.; Monteiro, Pedro M.S.; Munro, David R.; Murata, Akihiko; Newberger, Timothy; Omar, Abdirahman; Ono, Tsuneo; Paterson, Kristina; Pearce, David A.; Pierrot, Denis; Robbins, Lisa L.; Saito, Shu; Salisbury, Joe; Schlitzer, Reiner; Schneider, Bernd; Schweitzer, Roland; Sieger, Rainer; Skjelvan, Ingunn; Sullivan, Kevin F.; Sutherland, Stewart C.; Sutton, Adrienne J.; Tadokoro, Kazuaki; Telszewski, Maciej; Tuma, Matthias; Van Heuven, Steven M.A.C.; Vandemark, Doug; Ward, Brian; Watson, Andrew J.; Xu, Suqing (Peer reviewed; Journal article, 2016-09-15)
      The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity of carbon dioxide) values for the global surface oceans and coastal seas with regular updates. Version 3 of SOCAT has 14.7 million ...
    • A new global interior ocean mapped climatology: the 1° ×  1° GLODAP version 2 

      Lauvset, Siv Kari; Key, Robert M.; Olsen, Are; van Heuven, Steven; Velo, Antón; Lin, Xiaohua; Schirnick, Carsten; Kozyr, Alex; Tanhua, Toste; Hoppema, Mario; Jutterström, Sara; Steinfeldt, Reiner; Jeansson, Emil; Ishii, Masao; Pérez, Fiz F.; Suzuki, Toru; Watelet, Sylvain (Peer reviewed; Journal article, 2016-08-15)
      We present a mapped climatology (GLODAPv2.2016b) of ocean biogeochemical variables based on the new GLODAP version 2 data product (Olsen et al., 2016; Key et al., 2015), which covers all ocean basins over the years 1972 ...
    • 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 (Journal article; Peer reviewed, 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 ...
    • Ocean acidification in the subpolar North Atlantic: rates and mechanisms controlling pH changes 

      García-Ibáñez, Maribel I.; Zunino, Patricia; Fröb, Friederike; Carracedo, Lidia I.; Ríos, Aida F.; Mercier, Herlé; Olsen, Are; Pérez, Fiz F. (Peer reviewed; Journal article, 2016-06-23)
      Repeated hydrographic sections provide critically needed data on and understanding of changes in basin-wide ocean CO2 chemistry over multi-decadal timescales. Here, high-quality measurements collected at twelve cruises ...
    • Ocean Biogeochemical Predictions—Initialization and Limits of Predictability 

      Fransner, Filippa; Counillon, Francois; Bethke, Ingo; Tjiputra, Jerry; Samuelsen, Annette; Nummelin, Aleksi; Olsen, Are (Journal article; Peer reviewed, 2020)
      Predictions of ocean biogeochemistry, such as primary productivity and CO2 uptake, would help to understand the changing marine environment and the global climate. There is an emerging number of studies where initialization ...
    • On the future of Argo: A global, full-depth, multi-disciplinary array 

      Roemmich, Dean; Alford, Matthew H.; Claustre, Herve; Johnson, Kenneth S.; King, Brian; Moum, James; Oke, Peter R.; Owens, W. Brechner; Pouliquen, Sylvie; Purkey, Sarah; Scanderbeg, Megan; Suga, Toshio; Wijffels, Susan E.; Zilberman, Nathalie; Bakker, Dorothee; Baringer, Molly O.; Belbeoch, Mathieu; Bittig, Henry C.; Boss, Emmanuel; Calil, Paulo; Carse, Fiona; Carval, Thierry; Chai, Fei; Conchubhair, Diarmuid Ó.; D'Ortenzio, Fabrizio; Dall'Olmo, Giorgio; Desbruyeres, Damien; Fennel, Katja; Fer, Ilker; Ferrari, Raffaele; Forget, Gael; Freeland, Howard; Fujiki, Tetsuichi; Gehlen, Marion; Greenan, Blair; Hallberg, Robert; Hibiya, Toshiyuki; Hosoda, Shigeki; Jayne, Steven; Jochum, Markus; Johnson, Gregory C.; Kang, KiRyong; Kolodziejczyk, Nicolas; Körtzinger, Arne; Le Traon, Pierre-Yves; Lenn, Yueng-Djern; Maze, Guillaume; Mork, Kjell Arne; Morris, Tamaryn; Nagai, Takeyoshi; Nash, Jonathan; Garabato, Alberto N.; Olsen, Are; Pattabhi, Rama R.; Prakash, Satya; Riser, Stephen; Schmechtig, Catherin; Shroyer, Emily; Sterl, Andreas; Sutton, Philip; Talley, Lynne; Tanhua, Toste; Thierry, Virginie; Thomalla, Sandy; Toole, John; Troisi, Ariel; Trull, Thomas W.; Turton, Jonathan D.; Vélez-Belchi, Pedro Joaquin; Walczowski, Waldemar; Wang, Haili; Wanninkhof, Rik; Waterhouse, Amy F.; Watson, Andrew; Wilson, Cara; Wong, Annie P.S.; Xu, Jianping; Yasuda, Ichiro (Peer reviewed; Journal article, 2019-08-02)
      The Argo Program has been implemented and sustained for almost two decades, as a global array of about 4000 profiling floats. Argo provides continuous observations of ocean temperature and salinity versus pressure, from ...
    • On the future of Argo: A global, full-depth, multi-disciplinary array 

      Roemmich, Dean; Alford, Matthew H.; Claustre, Herve; Johnson, Kenneth S.; King, Brian; Moum, James; Oke, Peter R.; Owens, W. Brechner; Pouliquen, Sylvie; Purkey, Sarah; Scanderbeg, Megan; Suga, Toshio; Wijffels, Susan E.; Zilberman, Nathalie; Bakker, Dorothee; Baringer, Molly O.; Belbeoch, Mathieu; Bittig, Henry C.; Boss, Emmanuel; Calil, Paulo; Carse, Fiona; Carval, Thierry; Chai, Fei; Conchubhair, Diarmuid Ó.; D'Ortenzio, Fabrizio; Dall'Olmo, Giorgio; Desbruyeres, Damien; Fennel, Katja; Fer, Ilker; Ferrari, Raffaele; Forget, Gael; Freeland, Howard; Fujiki, Tetsuichi; Gehlen, Marion; Greenan, Blair; Hallberg, Robert; Hibiya, Toshiyuki; Hosoda, Shigeki; Jayne, Steven; Jochum, Markus; Johnson, Gregory C.; Kang, KiRyong; Kolodziejczyk, Nicolas; Körtzinger, Arne; Le Traon, Pierre-Yves; Lenn, Yueng-Djern; Maze, Guillaume; Mork, Kjell Arne; Morris, Tamaryn; Nagai, Takeyoshi; Nash, Jonathan; Garabato, Alberto N.; Olsen, Are; Pattabhi, Rama R.; Prakash, Satya; Riser, Stephen; Schmechtig, Catherin; Shroyer, Emily; Sterl, Andreas; Sutton, Philip; Talley, Lynne; Tanhua, Toste; Thierry, Virginie; Thomalla, Sandy; Toole, John; Troisi, Ariel; Trull, Thomas W.; Turton, Jonathan D.; Vélez-Belchi, Pedro Joaquin; Walczowski, Waldemar; Wang, Haili; Wanninkhof, Rik; Waterhouse, Amy F.; Watson, Andrew; Wilson, Cara; Wong, Annie P.S.; Xu, Jianping; Yasuda, Ichiro (Peer reviewed; Journal article, 2019-08-02)
      The Argo Program has been implemented and sustained for almost two decades, as a global array of about 4000 profiling floats. Argo provides continuous observations of ocean temperature and salinity versus pressure, from ...
    • On the nature of the factors that control spring bloom development at the entrance to the Barents Sea and their interannual variability 

      Olsen, Are; Johannessen, Truls; Rey, Francisco (Journal article, 2003-12)
      Analysis of data obtained by the Institute of Marine Research, Norway, at their regular surveys of the Fugløya-Bjørnøya section, between the northern tip of Norway and Bear Island, has allowed for an identification of the ...
    • Processes Driving Global Interior Ocean pH Distribution 

      Lauvset, Siv Kari; Carter, B.R.; Pérez, Fiz F.; Jiang, L.-Q.; Feely, Richard A.; Velo, Antón; Olsen, Are (Journal article; Peer reviewed, 2020)
      Ocean acidification evolves on the background of a natural ocean pH gradient that is the result of the interplay between ocean mixing, biological production and remineralization, calcium carbonate cycling, and temperature ...
    • Productivity in the Barents Sea - Response to recent climate variability 

      Dalpadado, Padmini; Arrigo, Kevin R.; Hjøllo, Solfrid Sætre; Rey, Francisco; Ingvaldsen, Randi; Sperfeld, Erik; van Dijken, Gert L.; Stige, Leif Christian; Olsen, Are; Ottersen, Geir (Peer reviewed; Journal article, 2014-05-01)
      The temporal and spatial dynamics of primary and secondary biomass/production in the Barents Sea since the late 1990s are examined using remote sensing data, observations and a coupled physical-biological model. Field ...
    • Reconstructing the time history of the air-sea CO2 disequilibrium and its rate of change in the eastern subpolar North Atlantic, 1972–1989 

      Omar, Abdirahman M.; Olsen, Are (Peer reviewed; Journal article, 2006-02-18)
      This study determines the temporal changes of wintertime surface ocean partial pressure of CO2 (pCO2 SW) in the eastern subpolar North Atlantic (esNA) (50–64ºN; 32–10ºW) by using data of carbon-system parameters and ...
    • A statistical gap-filling method to interpolate global monthly surface ocean carbon dioxide data 

      Jones, Steve D.; Le Quéré, Corinne; Rödenbeck, Christian; Manning, Andrew C.; Olsen, Are (Peer reviewed; Journal article, 2015-10-24)
      We have developed a statistical gap-filling method adapted to the specific coverage and properties of observed fugacity of surface ocean CO2 (fCO2). We have used this method to interpolate the Surface Ocean CO2 Atlas (SOCAT) ...
    • Student perceptions of learning scene efficiencies 

      Olsen, Are (UPED-skrift, Working paper, 2018)
    • Surface Ocean CO2 Atlas (SOCAT) gridded data products 

      Sabine, C. L.; Hankin, S.; Koyuk, H.; Bakker, D. C. E.; Pfeil, Benjamin; Olsen, Are; Metzl, N.; Kozyr, A.; Fassbender, A.; Manke, A.; Malczyk, J.; Akl, J.; Alin, S. R.; Bellerby, Richard; Borges, A.; Boutin, J.; Brown, P. J.; Cai, W.-J.; Chavez, F. P.; Chen, A.; Cosca, C.; Feely, R. A.; González-Dávila, M.; Goyet, C.; Hardman-Mountford, N.; Heinze, Christoph; Hoppema, M.; Hunt, C. W.; Hydes, D.; Ishii, M.; Johannessen, Truls; Key, R.M.; Körtzinger, A.; Landschützer, P.; Lauvset, Siv Kari; Lefévre, N.; Lenton, A.; Lourantou, A.; Merlivat, L.; Midorikawa, T.; Mintrop, L.; Miyazaki, C.; Murata, A.; Nakadate, A.; Nakano, Y.; Nakaoka, S.; Nojiri, Y.; Omar, Abdirahman; Padin, X. A.; Park, G.-H.; Paterson, K.; Perez, F. F.; Pierrot, D.; Poisson, A.; Rios, A.F.; Salisbury, J.; Santana-Casiano, J. M:; Sarma, V. V. S. S.; Schlitzer, R.; Schneider, B.; Schutser, U.; Sieger, R.; Skjelvan, Ingunn; Steinhoff, T.; Suzuki, T.; Takahashi, T.; Tedesco, K.; Telszewski, M.; Thomas, H.; Tilbrook, B.; Vandemark, D.; Veness, T.; Watson, A. J.; Weiss, R.; Wong, C.S.; Yoshikawa-Inoue, H. (Peer reviewed; Journal article, 2013-04-04)
      As a response to public demand for a well-documented, quality controlled, publically available, global surface ocean carbon dioxide (CO2) data set, the international marine carbon science community developed the Surface ...
    • 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, 2019-07-12)
      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 ...
    • Surface ocean pH and buffer capacity: past, present and future 

      Jiang, Li-qing; Carter, Brendan R; Feely, Richard A; Lauvset, Siv Kari; Olsen, Are (Peer reviewed; Journal article, 2019-12-09)
      The ocean’s chemistry is changing due to the uptake of anthropogenic carbon dioxide (CO2). This phenomenon, commonly referred to as “Ocean Acidification”, is endangering coral reefs and the broader marine ecosystems. In ...
    • Trends and drivers in global surface ocean pH over the past 3 decades 

      Lauvset, Siv Kari; Gruber, Nicolas; Landschützer, Peter; Olsen, Are; Tjiputra, Jerry (Peer reviewed; Journal article, 2015-03-02)
      We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO2 observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature ...
    • 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, 2019-10-29)
      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 ...
    • A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT) 

      Pfeil, Benjamin; Olsen, Are; Bakker, D. C. E.; Hankin, S.; Koyuk, H.; Kozyr, A.; Malczyk, J.; Manke, A.; Metzl, N.; Sabine, C. L.; Akl, J.; Alin, S. R.; Bates, N.; Bellerby, Richard; Borges, A.; Boutin, J.; Brown, P. J.; Cai, W.-J.; Chavez, F. P.; Chen, A.; Cosca, C.; Fassbender, A.; Feely, R. A.; González-Dávila, M.; Goyet, C.; Hales, B.; Hardman-Mountford, N.; Heinze, Christoph; Hood, M.; Hoppema, M.; Hunt, C. W.; Hydes, D.; Ishii, M.; Johannessen, Truls; Jones, S. D.; Key, R. M.; Körtzinger, A.; Landschützer, P.; Lauvset, Siv Kari; Lefèvre, N.; Lenton, A.; Lourantou, A.; Merlivat, L.; Midorikawa, T.; Mintrop, L.; Miyazaki, C.; Murata, A.; Nakadate, A.; Nakano, Y.; Nakaoka, S.; Nojiri, Y.; Omar, Abdirahman; Padin, X. A.; Park, H.; Paterson, K.; Perez, F. F.; Pierrot, D.; Poisson, A.; Rios, A.F.; Santana-Casiano, J. M.; Salisbury, J.; Sarma, V. V. S. S.; Schlitzer, R.; Schneider, B.; Schuster, U.; Sieger, R.; Skjelvan, Ingunn; Steinhoff, T.; Suzuki, T.; Takahashi, T.; Tedesco, K.; Telszewski, M.; Thomas, H.; Tilbrook, B.; Tjiputra, Jerry; Vandemark, D.; Veness, T.; Wanninkhof, R.; Watson, A. J.; Weiss, R.; Wong, C.S.; Yoshikawa-Inoue, H. (Peer reviewed; Journal article, 2013)
      A well-documented, publicly available, global data set of surface ocean carbon dioxide (CO2) parameters has been called for by international groups for nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was ...