• Aerosols at the poles: an AeroCom Phase II multi-model evaluation 

      Sand, Maria; Samset, Bjørn Hallvard; Balkanski, Yves; Bauer, Susanne; Bellouin, Nicolas; Berntsen, Terje Koren; Bian, Huisheng; Chin, Mian; Diehl, Thomas; Easter, Richard; Ghan, Steve J.; Iversen, Trond; Kirkevåg, Alf; Lamarque, Jean-Francois; Lin, Guangxing; Liu, Xiaohong; Luo, Gan; Myhre, Gunnar; Van Noije, Twan P.C.; Penner, Joyce E.; Schulz, Michael; Seland, Øyvind; Skeie, Ragnhild Bieltvedt; Stier, Philip; Takemura, Toshihiko; Tsigaridis, Kostas; Yu, Fangqun; Zhang, Kai; Zhang, Hua (Peer reviewed; Journal article, 2017)
    • Arctic tropospheric ozone: assessment of current knowledge and model performance 

      Whaley, Cynthia; Law, Kathy S.; Hjorth, Jens Liengaard; Skov, Henrik; Arnold, Stephen R.; Langner, Joakim; Pernov, Jakob Boyd; Bergeron, Garance; Bourgeois, Ilann; Christensen, Jesper H.; Chien, Rong-You; Deushi, Makoto; Dong, Xinyi; Effertz, Peter; Faluvegi, Gregory; Flanner, Mark G.; Fu, Joshua S.; Gauss, Michael; Huey, Greg L.; Im, Ulas; Kivi, Rigel; Marelle, Louis; Onishi, Tatsuo; Oshima, Naga; Petropavlovskikh, Irina; Peischl, Jeff; Plummer, David A.; Pozzoli, Luca; Raut, Jean-Christophe; Ryerson, Tom; Skeie, Ragnhild Bieltvedt; Solberg, Sverre; Thomas, Manu Anna; Thompson, Chelsea R.; Tsigaridis, Kostas; Tsyro, Svetlana; Turnock, Steven T.; von Salzen, Knut; Tarasick, David (Peer reviewed; Journal article, 2023)
      As the third most important greenhouse gas (GHG) after carbon dioxide (CO2) and methane (CH4), tropospheric ozone (O3) is also an air pollutant causing damage to human health and ecosystems. This study brings together ...
    • Atmospheric concentrations of black carbon are substantially higher in spring than summer in the Arctic 

      Jurányi, Zsófia; Zanatta, Marco; Lund, Marianne Tronstad; Samset, Bjørn Hallvard; Skeie, Ragnhild Bieltvedt; Sharma, Sangeeta; Wendisch, Manfred; Herber, Andreas (Peer reviewed; Journal article, 2023)
      A key driving factor behind rapid Arctic climate change is black carbon, the atmospheric aerosol that most efficiently absorbs sunlight. Our knowledge about black carbon in the Arctic is scarce, mainly limited to long-term ...
    • Atmospheric Impacts of Hydrogen as an Energy Carrier 

      Sand, Maria; Myhre, Gunnar; Sandstad, Marit; Skeie, Ragnhild Bieltvedt (CICERO Report;2020:07, Report, 2020-10)
    • Black carbon vertical profiles strongly affect its radiative forcing uncertainty 

      Samset, Bjørn Hallvard; Myhre, Gunnar; Schulz, M.; Balkanski, Y.; Bauer, S.; Berntsen, Terje Koren; Bian, H.; Bellouin, N.; Diehl, T.; Easter, R.C.; Ghan, S.J.; Iversen, Trond; Kinne, S.; Kirkevåg, Alf; Lamarque, J.-F.; Lin, G.; Liu, X.; Penner, J.E.; Seland, Øyvind; Skeie, Ragnhild Bieltvedt; Stier, P.; Takemura, T.; Tsigaridis, K.; Zhang, K. (Peer reviewed; Journal article, 2013)
      The impact of black carbon (BC) aerosols on the global radiation balance is not well constrained. Here twelve global aerosol models are used to show that at least 20% of the present uncertainty in modeled BC direct radiative ...
    • Climate effects of large-scale carbon capture and storage for coal-fired power 

      Torvanger, Asbjørn; Skeie, Ragnhild Bieltvedt (CICERO Report;2009:08, Research report, 2009)
    • Climate regulation of ships 

      Torvanger, Asbjørn; Bogstrand, Bjørg; Skeie, Ragnhild Bieltvedt; Fuglestvedt, Jan S. (CICERO Report;2007:07, Research report, 2007)
      This report gives an overview of five possible regulation schemes for carbon dioxide emissions from international shipping. The strengths and weaknesses of the schemes are compared with regard to nine criteria. The two ...
    • The Climate Response to Emissions Reductions Due to COVID-19: Initial Results From CovidMIP 

      Jones, Chris D.; Hickman, Jonathan; Rumbold, Steven T; Walton, Jeremy; Lamboll, Robin; Skeie, Ragnhild Bieltvedt; Fiedler, Stephanie; Forster, Piers M.; Rogelj, Joeri; Abe, Manabu; Botzet, Michael; Calvin, Katherine; Cassou, Christophe; Cole, Jason N S; Davini, Paolo; Deushi, Makoto; Dix, Martin; Fyfe, John; Gillett, Nathan P.; Ilyina, Tatiana; Kawamiya, Michio; Kelley, Maxwell; Kharin, Slava; Koshiro, Tsuyoshi; Li, Hongmei; MacKallah, Chloe; Müller, Wolfgang A.; Nabat, Pierre; Van Noije, Twan; Nolan, Paul; Ohgaito, Rumi; Oliviè, Dirk Jan Leo; Oshima, Naga; Parodi, Jose; Reerink, Thomas J.; Ren, Lili; Romanou, Anastasia; Séférian, Roland; Tang, Yangming; Timmreck, Claudia; Tjiputra, Jerry; Tourigny, Etienne; Tsigaridis, Kostas; Wang, Hailong; Wu, Mingxuan; Wyser, Klaus; Yang, Shuting; Yang, Yang; Ziehn, Tilo (Journal article; Peer reviewed, 2021)
      Many nations responded to the corona virus disease-2019 (COVID-19) pandemic by restricting travel and other activities during 2020, resulting in temporarily reduced emissions of CO2, other greenhouse gases and ozone ...
    • Climate sensitivity estimates - Sensitivity to radiative forcing time series and observational data 

      Skeie, Ragnhild Bieltvedt; Berntsen, Terje Koren; Aldrin, Magne Tommy; Holden, Marit; Myhre, Gunnar (Peer reviewed; Journal article, 2018)
      Inferred effective climate sensitivity (ECSinf) is estimated using a method combining radiative forcing (RF) time series and several series of observed ocean heat content (OHC) and near-surface temperature change in a ...
    • Climate-driven chemistry and aerosol feedbacks in CMIP6 Earth system models 

      Thornhill, Gillian; Collins, William J.; Oliviè, Dirk Jan Leo; Skeie, Ragnhild Bieltvedt; Archibald, Alexander T.; Bauer, Susanne E.; Checa-Garcia, Ramiro; Fiedler, Stephanie; Folberth, Gerd; Gjermundsen, Ada; Horowitz, Larry; Lamarque, Jean-Francois; Michou, Martine; Mulcahy, Jane; Nabat, Pierre; Naik, Vaishali; M. O'Connor, Fiona; Paulot, Fabien; Schulz, Michael; Scott, Catherine E.; Séférian, Roland; Smith, Christopher J.; Takemura, Toshihiko; Tilmes, Simone; Tsigaridis, Kostas; Weber, James (Journal article; Peer reviewed, 2021)
      Feedbacks play a fundamental role in determining the magnitude of the response of the climate system to external forcing, such as from anthropogenic emissions. The latest generation of Earth system models includes aerosol ...
    • Cloudy-sky contributions to the direct aerosol effect 

      Myhre, Gunnar; Samset, Bjørn Hallvard; Mohr, Christian Wilhelm; Alterskjær, Kari; Balkanski, Yves; Bellouin, Nicolas; Chin, Mian; Haywood, James; Hodnebrog, Øivind; Kinne, Stefan; Lin, Guangxing; Lund, Marianne Tronstad; Penner, Joyce E.; Schulz, Michael; Schutgens, Nick; Skeie, Ragnhild Bieltvedt; Stier, Philip; Takemura, Toshihiko; Zhang, Kai (Journal article; Peer reviewed, 2020)
      The radiative forcing of the aerosol–radiation interaction can be decomposed into clear-sky and cloudy-sky portions. Two sets of multi-model simulations within Aerosol Comparisons between Observations and Models (AeroCom), ...
    • Concentrations and radiative forcing of anthropogenic aerosols from 1750 to 2014 simulated with the Oslo CTM3 and CEDS emission inventory 

      Lund, Marianne Tronstad; Myhre, Gunnar; Haslerud, Amund Søvde; Skeie, Ragnhild Bieltvedt; Griesfeller, Jan; Platt, Stephen Matthew; Kumar, Rajesh; Myhre, Cathrine Lund; Schulz, Michael (Peer reviewed; Journal article, 2018)
      We document the ability of the new-generation Oslo chemistry-transport model, Oslo CTM3, to accurately simulate present-day aerosol distributions. The model is then used with the new Community Emission Data System (CEDS) ...
    • Concentrations and radiative forcing of anthropogenic aerosols from 1750 to 2014 simulated with the Oslo CTM3 and CEDS emission inventory 

      Lund, Marianne Tronstad; Myhre, Gunnar; Haslerud, Amund Søvde; Skeie, Ragnhild Bieltvedt; Griesfeller, Jan; Platt, Stephen Matthew; Kumar, Rajesh; Myhre, Cathrine Lund; Schulz, Michael (Peer reviewed; Journal article, 2018)
      We document the ability of the new-generation Oslo chemistry-transport model, Oslo CTM3, to accurately simulate present-day aerosol distributions. The model is then used with the new Community Emission Data System (CEDS) ...
    • Elemental carbon measurements in European Arctic snow packs 

      Forsström, S.; Isaksson, Elisabeth; Skeie, Ragnhild Bieltvedt; Ström, Johan; Pedersen, CA; Hudson, S.R.; Berntsen, Terje Koren; Lihavainen, H.; Godtliebsen, Fred; Gerland, Sebastian (Journal article; Peer reviewed, 2013)
      [1] Black carbon (BC) and other light-absorbing particles deposited on snow and ice are known to perturb the surface radiative balance. There are few published observations of the concentration of these particles in the ...
    • The Emissions Model Intercomparison Project (Emissions-MIP): Quantifying model sensitivity to emission characteristics 

      Ahsan, Hamza; Wang, Hailong; Wu, Jingbo; Wu, Mingxuan; Smith, Steven J.; Bauer, Susanne; Suchyta, Harrison; Oliviè, Dirk Jan Leo; Myhre, Gunnar; Matsui, Hitoshi; Bian, Huisheng; Lamarque, Jean-François; Carslaw, Ken; Horowitz, Larry; Regayre, Leighton; Chin, Mian; Schulz, Michael; Skeie, Ragnhild Bieltvedt; Takemura, Toshihiko; Naik, Vaishali (Peer reviewed; Journal article, 2023)
      Anthropogenic emissions of aerosols and precursor compounds are known to significantly affect the energy balance of the Earth–atmosphere system, alter the formation of clouds and precipitation, and have a substantial impact ...
    • Evaluation of ACCMIP outgoing longwave radiation from tropospheric ozone using TES satellite observations 

      Bowman, K.W.; Shindell, DT; Worden, HM; Lamarque, JF; Young, PJ; Stevenson, DS; Qu, Z; de la Torre, M; Bergmann, D.; Cameron-Smith, PJ; Collins, WJ; Doherty, R; Dalsøren, Stig Bjørløw; Faluvegi, G; Folberth, G; Horowitz, LW; Josse, BM; Lee, YH; MacKenzie, IA; Myhre, Gunnar; Nagashima, T; Naik, V; Plummer, DA; Rumbold, ST; Skeie, Ragnhild Bieltvedt; Strode, SA; Sudo, K; Szopa, S; Voulgarakis, A; Zeng, G; Kulawik, SS; Aghedo, AM; Worden, JR (Peer reviewed; Journal article, 2013)
      We use simultaneous observations of tropospheric ozone and outgoing longwave radiation (OLR) sensitivity to tropospheric ozone from the Tropospheric Emission Spectrometer (TES) to evaluate model tropospheric ozone and its ...
    • Evaluation of preindustrial to present-day black carbon and its albedo forcing from Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) 

      Lee, Y.H.; Lamarque, J.-F.; Flanner, M.G.; Jiao, C.; Shindell, D.T.; Berntsen, Terje Koren; Bisiaux, M.M.; Cao, J.; Collins, W.J.; Curran, M.; Edwards, R.; Faluvegi, G.; Ghan, S.; Horowitz, L.W.; McConnell, J.R.; Ming, J.; Myhre, Gunnar; Nagashima, T.; Naik, V.; Rumbold, S.T.; Skeie, Ragnhild Bieltvedt; Sudo, K.; Takemura, T.; Thevenon, F.; Xu, B.; Yoon, J.-H. (Peer reviewed; Journal article, 2013)
      As part of the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP), we evaluate the historical black carbon (BC) aerosols simulated by 8 ACCMIP models against observations including 12 ice core records, ...
    • Forty-seven years of weekly atmospheric black carbon measurements in the Finnish Arctic: Decrease in black carbon with declining emissions 

      Dutkiewicz, V. A.; DeJulio, A. M.; Ahmed, T; Laing, J; Hopke, P. K.; Skeie, Ragnhild Bieltvedt; Viisanen, Y; Paatero, J.; Husain, Liaquat (Peer reviewed; Journal article, 2014)
      Concentrations of atmospheric black carbon, [BC], were determined from filter samples collected weekly at Kevo, Finland (69°45′N, 27°02′E), from 1964 to 2010 using optical and thermal optical methods. The data provide the ...
    • A future perspective of historical contributions to climate change 

      Skeie, Ragnhild Bieltvedt; Peters, Glen Philip; Fuglestvedt, Jan S.; Andrew, Robbie (Journal article; Peer reviewed, 2021)
      Countries’ historical contributions to climate change have been on the agenda for more than two decades and will most likely continue to be an element in future international discussions and negotiations on climate. Previous ...
    • Global and regional trends of atmospheric sulfur 

      Aas, Wenche; Mortier, Augustin; Bowersox, Van C.; Cherian, Ribu; Faluvegi, Greg; Fagerli, Hilde; Hand, Jenny; Klimont, Zbigniew; Galy-Lacaux, Corinne; Lehmann, Christopher M. B.; Myhre, Cathrine Lund; Myhre, Gunnar; Oliviè, Dirk Jan Leo; Sato, Keiichi; Quaas, Johannes; Rao, P.S.P.; Schulz, Michael; Shindell, Drew; Skeie, Ragnhild Bieltvedt; Stein, Ariel; Takemura, Toshihiko; Tsyro, Svetlana; Vet, Robert; Xu, Xiaobin (Peer reviewed; Journal article, 2019)
      The profound changes in global SO2 emissions over the last decades have affected atmospheric composition on a regional and global scale with large impact on air quality, atmospheric deposition and the radiative forcing of ...