• 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 ...
    • Added value of a regional coupled model: the case study for marine heatwaves in the Caribbean 

      Pontoppidan, Marie; De Falco, Chiara; Mooney, Priscilla A.; Nummelin, Aleksi Henrynpoika; Tjiputra, Jerry (Peer reviewed; Journal article, 2023)
      There is an urgent need to improve capacity to predict marine heatwaves given their substantial negative impacts on marine ecosystems. Here we present the added value of a regional climate simulation, performed with the ...
    • Atlantic Meridional Overturning Circulation and δ13C Variability During the Last Interglacial 

      Kessler, Augustin; Bouttes, Nathaelle; Roche, Didier M.; Ninnemann, Ulysses S; Galaasen, Eirik Vinje; Tjiputra, Jerry (Journal article; Peer reviewed, 2020)
      The Atlantic Meridional Overturning Circulation (AMOC) is thought to be relatively vigorous and stable during Interglacial periods on multimillennial (equilibrium) timescales. However, recent proxy (δ13C benthic) reconstructions ...
    • Biogeochemical timescales of climate change onset and recovery in the North Atlantic interior under rapid atmospheric CO2 forcing 

      Bertini, Leonardo; Tjiputra, Jerry (Peer reviewed; Journal article, 2022)
      Anthropogenic climate change footprints in the ocean go beyond the mixed layer depth, with considerable impacts throughout mesopelagic and deep-ocean ecosystems. Yet, little is known about the timing of these environmental ...
    • Dynamics of spontaneous (multi) centennial‐scale variations of the Atlantic meridional overturning circulation strength during the last interglacial 

      Kessler, Augustin; Bouttes, Nathaelle; Roche, Didier M.; Ninnemann, Ulysses S; Tjiputra, Jerry (Peer reviewed; Journal article, 2020)
      Recent reconstructions of bottom water δ13C during the last interglacial (LIG) suggest short‐lived variability in the Atlantic meridional overturning circulation (AMOC). Spontaneous (multi) centennial‐scale variability of ...
    • Early detection of anthropogenic climate change signals in the ocean interior 

      Tjiputra, Jerry; Negrel, Jean; Olsen, Are (Journal article; Peer reviewed, 2023)
      Robust detection of anthropogenic climate change is crucial to: (i) improve our understanding of Earth system responses to external forcing, (ii) reduce uncertainty in future climate projections, and (iii) develop efficient ...
    • The emergence of the Gulf Stream and interior western boundary as key regions to constrain the future North Atlantic carbon uptake 

      Goris, Nadine; Johannsen, Klaus; Tjiputra, Jerry (Journal article; Peer reviewed, 2023)
      In recent years, the growing number of available climate models and future scenarios has led to emergent constraints becoming a popular tool to constrain uncertain future projections. However, when emergent constraints are ...
    • Estimation of Ocean Biogeochemical Parameters in an Earth System Model Using the Dual One Step Ahead Smoother: A Twin Experiment 

      Singh, Tarkeshwar; Counillon, Francois Stephane; Tjiputra, Jerry; Wang, Yiguo; Gharamti, Mohamad El (Peer reviewed; Journal article, 2022)
      Ocean biogeochemical (BGC) models utilise a large number of poorly-constrained global parameters to mimic unresolved processes and reproduce the observed complex spatio-temporal patterns. Large model errors stem primarily ...
    • Evaluation of ocean dimethylsulfide concentration and emission in CMIP6 models 

      Bock, Josué; Michou, Martine; Nabat, Pierre; Abe, Manabu; Mulcahy, Jane P.; Oliviè, Dirk Jan Leo; Schwinger, Jörg; Suntharalingam, Parvadha; Tjiputra, Jerry; van Hulten, Marco Marinus Peter; Watanabe, Michio; Yool, Andrew; Séférian, Roland (Peer reviewed; Journal article, 2021)
      Characteristics and trends of surface ocean dimethylsulfide (DMS) concentrations and fluxes into the atmosphere of four Earth system models (ESMs: CNRM-ESM2-1, MIROC-ES2L, NorESM2-LM, and UKESM1-0-LL) are analysed over the ...
    • A functional vulnerability framework for biodiversity conservation 

      Auber, Arnaud; Waldock, Conor; Maire, Anthony; Goberville, Eric; Albouy, Camille; Algar, Adam C.; McLean, Matthew; Brind'Amour, Anik; Green, Alison L.; Tupper, Mark; Vigliola, Laurent; Kaschner, Kristin; Kesner-Reyes, Kathleen; Beger, Maria; Tjiputra, Jerry; Toussaint, Aurèle; Violle, Cyrille; Mouquet, Nicolas; Thuiller, Wilfried; Mouillot, David (Peer reviewed; Journal article, 2022)
      Setting appropriate conservation strategies in a multi-threat world is a challenging goal, especially because of natural complexity and budget limitations that prevent effective management of all ecosystems. Safeguarding ...
    • Global Surface Ocean Acidification Indicators From 1750 to 2100 

      Jiang, Li-Qing; Dunne, John; Carter, Brendan R; Tjiputra, Jerry; Terhaar, Jens; Sharp, Jonathan D.; Olsen, Are; Alin, Simone; Bakker, Dorothee C.E.; Feely, Richard A.; Gattuso, Jean-Pierre; Hogan, Patrick; Ilyina, Tatiana; Lange, Nico; Lauvset, Siv Kari; Lewis, Ernie R.; Lovato, Tomas; Palmieri, Julien; Santana-Falcòn, Yeray; Schwinger, Jörg; Séférian, Roland; Strand, Gary; Swart, Neil; Tanhua, Toste; Tsujino, Hiroyuki; Wanninkhof, Rik; Watanabe, Michio; Yamamoto, Akitomo; Ziehn, Tilo (Peer reviewed; Journal article, 2023)
      A new data product, based on the latest computer simulations and observational data, offers improved projections of ocean acidification (OA) conditions from the start of the Industrial Revolution in 1750 to the end of the ...
    • Inequal responses of drylands to radiative forcing geoengineering methods 

      Park, Chang-Eui; Jeong, Su-Jong; Fan, Yuanchao; Tjiputra, Jerry; Muri, Helene; Zheng, Chunmiao (Peer reviewed; Journal article, 2019)
      Climate geoengineering has the potential to reduce global warming. However, the nonlinear responses of Earth's large‐scale circulation to climate geoengineering can exacerbate regional climate change, with potential ...
    • Irreversible loss in marine ecosystem habitability after a temperature overshoot 

      Santana-Falcòn, Yeray; Yamamoto, Akitomo; Lenton, Andrew; Jones, Chris D.; Burger, Friedrich A.; John, Jasmin G.; Tjiputra, Jerry; Schwinger, Jörg; Kawamiya, Michio; Frölicher, Thomas L.; Ziehn, Tilo; Séférian, Roland (Peer reviewed; Journal article, 2023)
      Anthropogenic warming of the oceans and associated deoxygenation are altering marine ecosystems. Current knowledge suggests these changes may be reversible on a centennial timescale at the ocean surface but irreversible ...
    • Machine learning reveals regime shifts in future ocean carbon dioxide fluxes inter-annual variability 

      Couespel, Damien; Tjiputra, Jerry; Johannsen, Klaus; Ayar, Pradeebane Vaittinada; Jensen, Bjørnar (Peer reviewed; Journal article, 2024)
      The inter-annual variability of global ocean air-sea CO2 fluxes are non-negligible, modulates the global warming signal, and yet it is poorly represented in Earth System Models (ESMs). ESMs are highly sophisticated and ...
    • NorCPM1 and its contribution to CMIP6 DCPP 

      Bethke, Ingo; Wang, Yiguo; Counillon, Francois Stephane; Keenlyside, Noel Sebastian; Kimmritz, Madlen; Fransner, Filippa; Samuelsen, Annette; Langehaug, Helene R.; Svendsen, Lea; Chiu, Ping-Gin; Passos, Leilane G.; Bentsen, Mats; Guo, Chuncheng; Gupta, Alok Kumar; Tjiputra, Jerry; Kirkevåg, Alf; Oliviè, Dirk Jan Leo; Seland, Øyvind; Vågane, Julie Solsvik; Fan, Yuanchao; Eldevik, Tor (Journal article; Peer reviewed, 2021)
      The Norwegian Climate Prediction Model version 1 (NorCPM1) is a new research tool for performing climate reanalyses and seasonal-to-decadal climate predictions. It combines the Norwegian Earth System Model version 1 (NorESM1) ...
    • Ocean Biogeochemical Predictions—Initialization and Limits of Predictability 

      Fransner, Filippa; Counillon, Francois; Bethke, Ingo; Tjiputra, Jerry; Samuelsen, Annette; Nummelin, Aleksi; Olsen, Are (Peer reviewed; Journal article, 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 ...
    • Ocean biogeochemistry in the Norwegian Earth System Model version 2 (NorESM2) 

      Tjiputra, Jerry; Schwinger, Jörg; Bentsen, Mats; Morée, Anne; Gao, Shuang; Bethke, Ingo; Heinze, Christoph; Goris, Nadine; Gupta, Alok Kumar; He, Yan-Chun; Oliviè, Dirk Jan Leo; Seland, Øyvind; Schulz, Michael (Peer reviewed; Journal article, 2020)
      The ocean carbon cycle is a key player in the climate system through its role in regulating the atmospheric carbon dioxide concentration and other processes that alter the Earth's radiative balance. In the second version ...
    • Overview of the Norwegian Earth System Model (NorESM2) and key climate response of CMIP6 DECK, historical, and scenario simulations 

      Seland, Øyvind; Bentsen, Mats; Oliviè, Dirk Jan Leo; Toniazzo, Thomas; Gjermundsen, Ada; Graff, Lise Seland; Debernard, Jens Boldingh; Gupta, Alok Kumar; He, Yan-Chun; Kirkevåg, Alf; Schwinger, Jörg; Tjiputra, Jerry; Aas, Kjetil Schanke; Bethke, Ingo; Fan, Yuanchao; Griesfeller, Jan; Grini, Alf; Guo, Chuncheng; Ilicak, Mehmet; Karset, Inger Helene H.; Landgren, Oskar Andreas; Liakka, Johan; Moseid, Kine Onsum; Nummelin, Aleksi; Spensberger, Clemens; Tang, Hui; Zhang, Zhongshi; Heinze, Christoph; Iversen, Trond; Schulz, Michael (Peer reviewed; Journal article, 2020)
      The second version of the coupled Norwegian Earth System Model (NorESM2) is presented and evaluated. NorESM2 is based on the second version of the Community Earth System Model (CESM2) and shares with CESM2 the computer ...
    • A Regime View of ENSO Flavors Through Clustering in CMIP6 Models 

      Ayar, Pradeebane Vaittinada; Battisti, David Stephen; Li, Camille; King, Martin; Vrac, Mathieu; Tjiputra, Jerry (Peer reviewed; Journal article, 2023)
      El Niño-Southern Oscillation (ENSO) flavors in the tropical Pacific are studied from a regime perspective. Five recurring spatial patterns or regimes characterizing the diversity of ENSO are established using a clustering ...
    • The representation of alkalinity and the carbonate pump from CMIP5 to CMIP6 Earth system models and implications for the carbon cycle 

      Planchat, Alban; Kwiatkowski, Lester; Bopp, Laurent; Torres, Olivier; Christian, James R.; Butenschon, Momme; Lovato, Tomas; Séférian, Roland; Chamberlain, Matthew; Aumont, Olivier; Watanabe, Michio; Yamamoto, Akitomo; Yool, Andrew; Ilyina, Tatiana; Tsujino, Hiroyuki; Krumhardt, Kristen; Schwinger, Jörg; Tjiputra, Jerry; Dunne, John; Stock, Charles (Peer reviewed; Journal article, 2023)
      Ocean alkalinity is critical to the uptake of atmospheric carbon in surface waters and provides buffering capacity towards the associated acidification. However, unlike dissolved inorganic carbon (DIC), alkalinity is not ...