• 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)
    • Atmospheric Impacts of Hydrogen as an Energy Carrier 

      Sand, Maria; Myhre, Gunnar; Sandstad, Marit; Skeie, Ragnhild Bieltvedt (CICERO Report;2020:07, Report, 2020-10)
      Hydrogen gas emissions to the atmosphere can very likely cause global warming through indirect effects. It can also possibly cause depletion of the ozone layer, and impact air pollution. These adverse effects are likely ...
    • Atmospheric methane evolution the last 40 years 

      Dalsøren, Stig Bjørløw; Myhre, Cathrine Lund; Myhre, Gunnar; Gomez-Pelaez, Angel J.; Haslerud, Amund Søvde; Isaksen, Ivar S. A.; Weiss, Ray F.; Harth, Christina M. (Peer reviewed; Journal article, 2016)
      Observations at surface sites show an increase in global mean surface methane (CH4) of about 180 parts per billion (ppb) (above 10 %) over the period 1984–2012. Over this period there are large fluctuations in the annual ...
    • Black Carbon and Precipitation: An Energetics Perspective 

      Sand, Maria; Samset, Bjørn Hallvard; Tsigaridis, Kostas; Bauer, Susanne E.; Myhre, Gunnar (Journal article; Peer reviewed, 2020)
      Black carbon (BC) aerosols influence precipitation through a range of processes. The climate response to the presence of BC is however highly dependent on its vertical distribution. Here, we analyze the changes in the ...
    • 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 response to externally mixed black carbon as a function of altitude 

      Samset, Bjørn Hallvard; Myhre, Gunnar (Peer reviewed; Journal article, 2015)
      The climate response to the presence of black carbon (BC) aerosol at a given altitude in the atmosphere is investigated using a global circulation model. The vertical dependence of the efficiency with which BC exerts ...
    • 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 ...
    • 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) ...
    • Distinct responses of Asian summer monsoon to black carbon aerosols and greenhouse gases 

      Xie, Xiaoning; Myhre, Gunnar; Liu, Xiaodong; Li, Xinzhou; Shi, Zhengguo; Wang, Hongli; Kirkevåg, Alf; Lamarque, Jean-Francois; Shindell, Drew; Takemura, Toshihiko; Liu, Yangang (Journal article; Peer reviewed, 2020)
      Black carbon (BC) aerosols emitted from natural and anthropogenic sources induce positive radiative forcing and global warming, which in turn significantly affect the Asian summer monsoon (ASM). However, many aspects of ...
    • Dynamical response of Mediterranean precipitation to greenhouse gases and aerosols 

      Tang, Tao; Shindell, Drew; Samset, Bjørn Hallvard; Boucher, Olivier; Forster, Piers M.; Hodnebrog, Øivind; Myhre, Gunnar; Sillmann, Jana; Voulgarakis, Apostolos; Andrews, Timothy; Faluvegi, Gregory S.; Fläschner, Dagmar; Iversen, Trond; Kasoar, Matthew; Kharin, Viatcheslav; Kirkevåg, Alf; Lamarque, Jean-Francois; Oliviè, Dirk Jan Leo; Richardson, Thomas; Stjern, Camilla Weum; Takemura, Toshihiko (Peer reviewed; Journal article, 2018)
    • The effect of rapid adjustments to halocarbons and N2O on radiative forcing 

      Hodnebrog, Øivind; Myhre, Gunnar; Kramer, Ryan J.; Shine, Keith P.; Andrews, Timothy; Faluvegi, Greg; Kasoar, Matthew; Kirkevåg, Alf; Lamarque, Jean-Francois; Mülmenstädt, Johannes; Oliviè, Dirk Jan Leo; Samset, Bjørn Hallvard; Shindell, Drew; Smith, Christopher J.; Takemura, Toshihiko; Voulgarakis, Apostolos (Journal article; Peer reviewed, 2020)
      Rapid adjustments occur after initial perturbation of an external climate driver (e.g., CO2) and involve changes in, e.g. atmospheric temperature, water vapour and clouds, independent of sea surface temperature changes. ...
    • Effects of anthropogenic emissions on tropospheric ozone and its radiative forcing 

      Berntsen, Terje Koren; Isaksen, Ivar S. A.; Fuglestvedt, Jan S.; Myhre, Gunnar; Larsen, T. Alsvik; Stordal, Frode; Freckleton, R. S.; Shine, Keith P. (CICERO Report;1997:02, Research report, 1997)
      Tropospheric ozone changes since pre-industrial times due to changes in emissions have been calculated by the University of Oslo global 3-D photochemical model. The radiative forcing caused by the increase in ozone has ...
    • 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, ...
    • Frequency of extreme precipitation increases extensively with event rareness under global warming 

      Myhre, Gunnar; Alterskjær, Kari; Stjern, Camilla Weum; Hodnebrog, Øivind; Marelle, Louis; Samset, Bjørn Hallvard; Sillmann, Jana; Schaller, Nathalie; Fischer, Erich; Schulz, Michael; Stohl, Andreas (Journal article; Peer reviewed, 2019)
      The intensity of the heaviest extreme precipitation events is known to increase with global warming. How often such events occur in a warmer world is however less well established, and the combined effect of changes in ...
    • Global and regional radiative forcing from 20 % reductions in BC, OC and SO4 - An HTAP2 multi-model study 

      Stjern, Camilla Weum; Samset, Bjørn Hallvard; Myhre, Gunnar; Bian, Huisheng; Chin, Mian; Davila, Yanko; Dentener, Frank; Emmons, Louisa; Flemming, Johannes; Haslerud, Amund Søvde; Henze, Daven; Jonson, Jan Eiof; Kucsera, Tom; Lund, Marianne Tronstad; Schulz, Michael; Sudo, Kengo; Takemura, Toshihiko; Tilmes, Simone (Peer reviewed; Journal article, 2016)
      In the Hemispheric Transport of Air Pollution Phase 2 (HTAP2) exercise, a range of global atmospheric general circulation and chemical transport models performed coordinated perturbation experiments with 20 % reductions ...
    • 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 ...
    • A global model–measurement evaluation of particle light scattering coefficients at elevated relative humidity, 

      Burgos, María A.; Andrews, Elisabeth; Titos, Gloria; Benedetti, Angela; Bian, Huisheng; Buchard, Virginie; Curci, Gabriele; Kipling, Zak; Kirkevåg, Alf; Kokkola, Harri; Laakso, Anton; Letertre-Danczak, Julie; Lund, Marianne Tronstad; Matsui, Hitoshi; Myhre, Gunnar; Randles, Cynthia; Schulz, Michael; Noije, Twan van; Zhang, Kai; Alados-Arboledas, Lucas; Baltensperger, Urs; Jefferson, Anne; Sherman, James; Sun, Junying; Weingartner, Ernest; Zieger, Paul (Journal article; Peer reviewed, 2020)
      The uptake of water by atmospheric aerosols has a pronounced effect on particle light scattering properties, which in turn are strongly dependent on the ambient relative humidity (RH). Earth system models need to account ...