Browsing CICERO Research Archive by Author "Kramer, Ryan J."

Now showing items 1-7 of 7

    • 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. ...

    • Historical total ozone radiative forcing derived from CMIP6 simulations 

      Skeie, Ragnhild Bieltvedt; Myhre, Gunnar; Hodnebrog, Øivind; Cameron-Smith, Philip J.; Deushi, Makoto; Hegglin, Michaela I.; Horowitz, Larry W.; Kramer, Ryan J.; Michou, Martine; Mills, Michael J.; Oliviè, Dirk Jan Leo; O’Connor, Fiona M.; Paynter, David; Samset, Bjørn Hallvard; Sellar, Alistair; Shindell, Drew; Takemura, Toshihiko; Tilmes, Simone; Wu, Tongwen (Journal article; Peer reviewed, 2020)
      Radiative forcing (RF) time series for total ozone from 1850 up to the present day are calculated based on historical simulations of ozone from 10 climate models contributing to the Coupled Model Intercomparison Project ...

    • Interactions between atmospheric composition and climate change - progress in understanding and future opportunities from AerChemMIP, PDRMIP, and RFMIP 

      Fiedler, Stephanie; Naik, Vaishali; O'Connor, Fiona M.; Smith, Christopher J.; Griffiths, Paul; Kramer, Ryan J.; Takemura, Toshihiko; Allen, Robert J.; Im, Ulas; Kasoar, Matthew; Modak, Angshuman; Turnock, Steven; Voulgarakis, Apostolos; Watson-Parris, Duncan; Westervelt, Daniel M.; Wilcox, Laura J.; Zhao, Alcide; Collins, William J.; Schulz, Michael; Myhre, Gunnar; Forster, Piers M. (Peer reviewed; Journal article, 2024)
      The climate science community aims to improve our understanding of climate change due to anthropogenic influences on atmospheric composition and the Earth's surface. Yet not all climate interactions are fully understood, ...

    • Observational Evidence of Increasing Global Radiative Forcing 

      Kramer, Ryan J.; He, Haozhe; Soden, Brian J.; Oreopoulos, Lazaros; Myhre, Gunnar; Forster, Piers M.; Smith, Christopher J. (Journal article; Peer reviewed, 2021)
      Changes in atmospheric composition, such as increasing greenhouse gases, cause an initial radiative imbalance to the climate system, quantified as the instantaneous radiative forcing. This fundamental metric has not been ...

    • Present-day methane shortwave absorption mutes surface warming relative to preindustrial conditions 

      Allen, Robert J.; Zhao, Xueying; Randles, Cynthia A.; Kramer, Ryan J.; Samset, Bjørn Hallvard; Smith, Christopher J. (Peer reviewed; Journal article, 2024)
      Recent analyses show the importance of methane shortwave absorption, which many climate models lack. In particular, Allen et al. (2023) used idealized climate model simulations to show that methane shortwave absorption ...

    • 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 ...

    • Surface warming and wetting due to methane’s long-wave radiative effects muted by short-wave absorption 

      Allen, Robert J.; Zhao, Xueying; Randles, Cynthia A.; Kramer, Ryan J.; Samset, Bjørn Hallvard; Smith, Christopher J. (Peer reviewed; Journal article, 2023)
      Although greenhouse gases absorb primarily long-wave radiation, they also absorb short-wave radiation. Recent studies have highlighted the importance of methane short-wave absorption, which enhances its stratospherically ...