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GFDL Events & Seminars

Upcoming GFDL events & seminars

Events and seminars
  • May 9, 2016: Geeta Persad Final Public Oral Exam
    Geeta Persad Final Public Oral Exam
    Geeta Persad Final Public Oral Exam
    Time: 10:00 am - 12:00 pm
    Location: Smagorinsky Seminar Room
  • May 11, 2016: Implications for climate sensitivity from the response to individual forcings
    Kate Marvel (NASA GISS at Columbia University)
    Climate sensitivity to doubled CO2 is a widely-used metric of the large-scale response to external forcing. Climate models predict a wide range for two commonly used definitions: the transient climate response (TCR: the warming after 70 years of CO2 concentrations that rise at 1% per year), and the equilibrium climate sensitivity (ECS: the equilibrium temperature following an abrupt doubling of CO2 concentrations). Many observational datasets have been used to constrain these values, including temperature trends over the recent past, inferences from paleo-climate, and process-based constraints from the modern satellite era. However, different classes of observational constraints produce incongruent ranges. In this talk, I'll show that climate sensitivity can only be accurately derived from the historical period after accounting for the efficacy of each forcing. When we use single forcing experiments to estimate these efficacies and calculate climate sensitivity from the observed twentieth-century warming, our estimate of both TCR and ECS is revised upward compared to previous studies, improving the consistency with other independent constraints.
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • May 12, 2016: Parameterising sub-grid scale sea ice physics for climate models: anisotropic rheology and melt ponds
    Danny Feltham (University of Reading, UK)
    Climate model representations of sea ice are incomplete, being limited by insufficient knowledge of sea ice physics and the level of complexity it is practical to represent. A consequence is that increasing the resolution of sea ice models does not, in itself, resolve new sea ice process: sub-grid scale parameterisations are required. The construction of suitable parameterisations presents challenges: salient aspects of the physics must be captured; fundamental principles such as conservation of mass and material frame indifference must be respected; and the model must be computationally tractable. The development of parameterisations involves judgment calls: it should not be expected that a parameterisation is the best possible description of the physics. In this talk, I outline briefly the case for improving sea ice physics in climate models, and, in particular, motivate and describe two recently developed sea ice parameterisations: for anisotropic rheology, and melt ponds. I will indicate why the parameterisations were built as they were, touching upon the issues mentioned above, and show some example simulations indicating the benefits that more realistic parameterisations bring to emergent sea ice properties in climate simulations and seasonal prediction.
    Time: 2:00 pm - 3:30 pm
    Location: Smagorinsky Seminar Room
  • May 18, 2016: TBD
    Fernando Gonzalez Taboada (GFDL)
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • May 19, 2016: TBD
    Simona Bordoni (California Institute of Technology)
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • May 26, 2016: TBD
    John Higgins (Princeton University)
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • May 31, 2016: TBD
    Peng Gong (Tsinghua University)
    TBD
    Time: 12:00 pm - 1:15 pm
    Location: Smagorinsky Seminar Room
  • June 1, 2016: TBD
    Alon Stern
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • June 2, 2016: TBD
    Alessandra Giannini (International Research Institute for Climate and Society, Columbia University)
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • June 6, 2016: Ron Stouffer Symposium
    Ron Stouffer Symposium
    For the past 38 years, Ron Stouffer's comprehensive research contributions at GFDL have expanded scientific understanding of the atmosphere, oceans, and climate through high performance supercomputing with mathematical models of the Earth system. Ron's accomplishments include the development, along with Suki Manabe, of the first coupled atmosphere-ocean models for global climate warming projections, new understanding of natural modes of climate variability, palecolimate, atmosphere and ocean responses to natural and human-influenced factors, and ongoing leadership of both model development within GFDL and community synthesis efforts through the Coupled Model Intercomparison Project and the Intergovernmental Panel on Climate Change. To commemorate Ron Stouffer's illustrious career, we are in the early planning stage to hold a one day Symposium at GFDL. We are planning three forward-looking science sessions focusing on topics on which Ron's career has had demonstrable impact. The morning session will foucs on scientific talks relating to climate change and community assessments therof, followed by a panel discussion on the increasing overlap between climate modeling and impact assessments and to what extent can they be merged. The afternoon session will include a range of climate-related talks on regional patterns, variability, sea level rise, the carbon system and other topics on which Ron has demonstrated scientific leadership. For more information click here
    Time: 9:00 am - 6:00 pm
    Location: Smagorinsky Seminar Room
  • June 8, 2016: Lunch Time Seminar Series
    Lunch Time Seminar Series
    Lunch Time Seminar Series
    Time: 12:00 pm - 1:30 pm
    Location: Smagorinsky Seminar Room
  • June 15, 2016: TBD
    Louise Nuijens (MIT)
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • June 16, 2016: TBD
    Roberto Buizza (ECMWF, Reading UK)
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • June 21, 2016: Junyi Chai Final Public Oral
    Junyi Chai Final Public Oral
    Junyi Chai Final Public Oral
    Time: 10:00 am - 12:00 pm
    Location: Smagorinsky Seminar Room
  • June 23, 2016: TBD
    Dr. Lundquist
    TBD
    Time: 2:00 pm - 3:30 pm
    Location: Smagorinsky Seminar Room
  • August 12, 2016: Jeff Strong Final Oral Presentation
    Jeff Strong Final Oral Presentation
    Jeff Strong Final Oral Presentation
    Time: 10:00 am - 12:00 pm
    Location: Smagorinsky Seminar Room

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