Blar i CICERO Research Archive på forfatter "Stjern, Camilla Weum"

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    • Aerosol absorption in global models from AeroCom phase III 

      Sand, Maria; Samset, Bjørn Hallvard; Myhre, Gunnar; Gliss, Jonas; Bauer, Susanne E.; Bian, Huisheng; Chin, Mian; Checa-Garcia, Ramiro; Ginoux, Paul; Kipling, Zak; Kirkevåg, Alf; Kokkola, Harri; Le Sager, Philippe; Lund, Marianne Tronstad; Matsui, Hitoshi; Van Noije, Twan; Oliviè, Dirk Jan Leo; Rémy, Samuel; Schulz, Michael; Stier, Philip; Stjern, Camilla Weum; Takemura, Toshihiko; Tsigaridis, Kostas; Tsyro, Svetlana; Watson-Parris, Duncan (Peer reviewed; Journal article, 2021)
      Aerosol-induced absorption of shortwave radiation can modify the climate through local atmospheric heating, which affects lapse rates, precipitation, and cloud formation. Presently, the total amount of aerosol absorption ...

    • 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)

    • 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 ...

    • How aerosols and greenhouse gases influence the diurnal temperature range 

      Stjern, Camilla Weum; Samset, Bjørn Hallvard; Boucher, Olivier; Iversen, Trond; Lamarque, Jean-Francois; Myhre, Gunnar; Shindell, Drew; Takemura, Toshihiko (Journal article; Peer reviewed, 2020)
      The diurnal temperature range (DTR) (or difference between the maximum and minimum temperature within a day) is one of many climate parameters that affects health, agriculture and society. Understanding how DTR evolves ...

    • How much snow falls in the world's mountains? A first look at mountain snowfall estimates in A-train observations and reanalyses 

      Daloz, Anne Sophie; Mateling, Marian; L'Ecuyer, Tristan; Kulie, Mark; Wood, Norman B.; Durand, Mikael; Wrzesien, Melissa; Stjern, Camilla Weum; Dimri, Ashok P. (Journal article; Peer reviewed, 2020)
      CloudSat estimates that 1773 km3 of snow falls, on average, each year over the world's mountains. This amounts to 5 % of the global snowfall accumulations. This study synthetizes mountain snowfall estimates over the four ...

    • Marine cloud brightening – as effective without clouds 

      Ahlm, Lars; Jones, Andy; Stjern, Camilla Weum; Muri, Helene; Kravitz, Ben; Kristjansson, Jon Egill (Peer reviewed; Journal article, 2017)

    • Near- and long-term global warming of current emissions 

      Lund, Marianne Tronstad; Stjern, Camilla Weum; Samset, Bjørn Hallvard; Aamaas, Borgar; Kallbekken, Steffen (2018:15, Research report, 2018-11-05)
      Human activities influence the climate in a range of ways. While emissions of CO2 from burning of fossil fuels is the dominant factor behind the present rapid global warming, many other gases and particles also contribute. ...

    • Response to marine cloud brightening in a multi-model ensemble 

      Stjern, Camilla Weum; Muri, Helene; Ahlm, Lars; Boucher, Olivier; Cole, Jason N.S.; Ji, Duoying; Jones, Andy; Haywood, Jim M.; Kravitz, Ben; Lenton, Andrew; Moore, John C.; Niemeier, Ulrike; Phipps, Steven J.; Schmidt, Hauke; Watanabe, Shingo; Kristjansson, Jon Egill (Peer reviewed; Journal article, 2018)

    • Response to marine cloud brightening in a multi-model ensemble 

      Stjern, Camilla Weum; Muri, Helene; Ahlm, Lars; Boucher, Olivier; Cole, Jason N.S.; Ji, Duoying; Jones, Andy; Haywood, Jim M.; Kravitz, Ben; Lenton, Andrew; Moore, John C.; Niemeier, Ulrike; Phipps, Steven J.; Schmidt, Hauke; Watanabe, Shingo; Kristjansson, Jon Egill (Journal article, 2017)
      Here we show results from Earth System Model simulations from the marine cloud brightening experiment G4cdnc of the Geoengineering Model Intercomparison Project (GeoMIP). The nine contributing models prescribe a 50 % ...

    • Scientific data from precipitation driver response model intercomparison project 

      Myhre, Gunnar; Samset, Bjørn Hallvard; Forster, Piers M.; Hodnebrog, Øivind; Sandstad, Marit; Mohr, Christian Wilhelm; Stjern, Camilla Weum; Sillmann, Jana; Andrews, Timothy; Boucher, Olivier; Faluvegi, Gregory; Iversen, Trond; Lamarque, Jean-Francois; Kasoar, Matthew; Kirkevåg, Alf; Kramer, Ryan J.; Liu, Longbo; Mülmenstädt, Johannes; Oliviè, Dirk Jan Leo; Quaas, Johannes; Richardson, Thomas B.; Shawki, Dilshad; Shindell, Drew; Smith, Chris; Stier, Philip; Tang, Tao; Takemura, Toshihiko; Voulgarakis, Apostolos; Watson-Parris, Duncan (Peer reviewed; Journal article, 2022)
      This data descriptor reports the main scientific values from General Circulation Models (GCMs) in the Precipitation Driver and Response Model Intercomparison Project (PDRMIP). The purpose of the GCM simulations has been ...

    • Strong contribution from sensible heat to global precipitation increase in climate models is not supported by observational based data 

      Myhre, Gunnar; Jouan, Caroline; Stjern, Camilla Weum; Hodnebrog, Øivind (Peer reviewed; Journal article, 2024)
      It has previously been shown that trends in sensible heat from climate models have had a substantial contribution to global precipitation changes. We illustrate that this is the case also in the most recent Coupled Model ...

    • The climate impacts of current black carbon and organic carbon emissions 

      Aamaas, Borgar; Lund, Marianne Tronstad; Myhre, Gunnar; Samset, Bjørn Hallvard; Stjern, Camilla Weum; Kallbekken, Steffen (2018:08, Research report, 2018-06-20)
      In Part 1, we present a summary of recent research into the climate impact of black and organic carbon. There have been many developments on the research front in recent years, and this rapid pace is expected to continue. ...

    • The Time Scales of Climate Responses to Carbon Dioxide and Aerosols 

      Stjern, Camilla Weum; Forster, Piers M.; Jia, Hailing; Jouan, Caroline; Kasoar, Matthew R.; Myhre, Gunnar; Oliviè, Dirk Jan Leo; Quaas, Johannes; Samset, Bjørn Hallvard; Sand, Maria; Takemura, Toshihiro; Voulgarakis, Apostolos; Wells, Christopher D. (Peer reviewed; Journal article, 2023)
      The climate system responds to changes in the amount of atmospheric greenhouse gases or aerosols through rapid processes, triggered within hours and days, and through slower processes, where the full response may only be ...