GFDL - Geophysical Fluid Dynamics Laboratory

GFDL Events & Seminars

Upcoming GFDL events & seminars

Events and seminars

  • September 27, 2017: Harvey & Irma, Part One: Attribution, Precipitation & Flooding
    Harvey & Irma, Part One: Attribution, Precipitation & Flooding
    Harvey & Irma, Part One: Attribution, Precipitation & Flooding
    Time: 12:00 pm - 2:00 pm
    Location: Smagorinsky Seminar Room
  • September 27, 2017: Wave breaking in ocean-atmosphere interactions
    Luc Deike (Princeton University)
    TBD
    Time: 10:30 am - 11:30 am
    Location: Smagorinsky Seminar Room
  • September 28, 2017: Harvey & Irma Part Two: Prediction Across Timescales
    Harvey & Irma Part Two: Prediction Across Timescales
    Harvey & Irma Part Two: Prediction Across Timescales
    Time: 12:00 pm - 2:00 pm
    Location: Smagorinsky Seminar Room
  • October 4, 2017: Indian Monsoon Depressions: New insights from GFDL's AGCM and Linear Theory
    Angel Adames (GFDL)
    The mechanisms that lead to the propagation of moisture and moist static energy in monsoon low and high-pressure systems collectively referred to as synoptic-scale monsoonal disturbances (SMDs), are investigated using daily output fields from GFDL's Atmospheric Model 4 (AM4). Propagation of the moisture anomalies is dominated by vertical moisture advection while the MSE anomalies propagate due to horizontal advection of low-frequency dry static energy by the SMD winds. By combining the budgets, we interpret the propagation of the precipitation anomalies in terms of lifting that is forced by horizontal dry static energy advection. This process moistens the lower free troposphere, producing an environment that is conducive for deep convection. The precipitation anomalies are, in turn, largely maintained by longwave radiative heating. Based on these results, we propose a linear framework where the evolution of moisture plays a central role in SMDs. In this framework, warm air advection by the anomalous northerly winds induces vertical moisture advection, which moistens and destabilizes the column. The moistened lowered troposphere enhances convection which, in turn, causes the low pressure system to intensify through vortex stretching. This instability only occurs if the vorticity tendency from dry processes (such as horizontal vorticity advection) and moist processes (vortex stretching from convection) are of the same polarity.
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • October 5, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • October 10, 2017: Robert Nazarian Final Public Oral Presentation
    Robert Nazarian Final Public Oral Presentation
    Robert Nazarian Final Public Oral Presentation
    Time: 10:00 am - 12:00 pm
    Location: Smagorinsky Seminar Room
  • October 11, 2017: TBD
    Alexandra Jones
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • October 12, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • October 16, 2017: Interhemispheric Asymmetry in Global Warming
    Suki Manabe (AOS Program at Princeton University)
    As the concentration of greenhouse gas increases in the atmosphere, temperature increases at the earth surface. In the Northern Hemisphere, the magnitude of the warming increases with increasing latitude and is at a maximum over the Arctic Ocean and its immediate vicinity. In the Southern Hemisphere, on the other hand, the polar amplification of the global warming is absent in the Antarctic Ocean. This is what happened in the numerical experiment conducted at GFDL almost 30 years ago. The geographical pattern of global warming described above appears to be broadly consistent with the pattern of surface temperature change that have been observed during the last several decades, when the rate of increase of greenhouse gas is pronounced. In this talk, I would like to discuss the role of ocean in delaying global warming particularly in the circumpolar ocean of the Southern Hemisphere.
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • October 18, 2017: TBA
    Kieran Bhatia
    TBD; POC: kieran.bhatia@noaa.gov
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • October 19, 2017: TBD
    Mingfang Ting
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • October 25, 2017: TBD
    Hyeyum Hailey Shin (GFDL)
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • October 26, 2017: TBD
    John Abatzoglou
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • November 1, 2017: Convection, climate, and their sensitivities in cloud-resolving FV3
    Nadir Jeevanjee (GFDL)
    We present cloud-resolving FV3 simulations and explore their sensitivity to resolution, the hydrostatic approximation, and numerical damping parameters. We find that O(100 m) resolutions are required for convective vertical velocities to converge, and that the hydrostatic solver overestimates these by a factor of 2 - 3 in this regime. We develop analytic theory to explain these results. We also find a striking sensitivity of the mean climate to `divergence damping', a commonly used form of explicit diffusion on the wind fields. This sensitivity appears to be tied to the width of convective updrafts, which increases with increased damping and acts as kind of convective organization, dramatically drying out the troposphere, reducing cloudiness, and increasing the OLR by up to 35 W/m^2.
    Time: 10:00 am - 11:00 am
    Location: Smagorinsky Seminar Room
  • November 2, 2017: GFDL Fall Symposium
    GFDL Fall Symposium
    GFDL Fall Symposium takes place at Frick Hall in Taylor Auditorium
    Time: 8:00 am - 5:00 pm
    Location: Other (see event description)
  • November 8, 2017: TBD
    Pu Lin (GFDL)
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • November 9, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • November 15, 2017: TBD
    Laure Zanna (GFDL )
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • November 16, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • November 29, 2017: Chairman of the Board
    David Goodrich (Chesapeake Climate Action Network)
    A Hole in the Wind: A Bicycle Journey Across the US, Looking at Climateā€¯ After retiring from NOAA in 2011, the speaker rode 4200 miles from Delaware to Oregon, looking at the effects of climate change up close and talking with people along the way. He came across fragmented barrier islands on the coast, drought and expanding wind farms in Kansas, beetle-killed forest in Colorado and fire in Idaho. Along the way, he encountered a toddler's beauty pageant in Maryland, the landscape of fracking in Pennsylvania, a tornado party in Missouri, and a ghost town in Wyoming. His book, A Hole in the Wind, was released by Pegasus Books this summer.
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • November 30, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • December 6, 2017: Why has the tropical lower stratosphere stopped cooling for the last 20 years?
    Lorenzo Polvani (Columbia University)
    TBD
    Time: 12:00 pm - 1:00 pm
    Location: Smagorinsky Seminar Room
  • December 7, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • December 14, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • December 21, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • December 28, 2017: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • January 4, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • January 11, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • January 18, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • January 25, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • February 1, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • February 8, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • February 22, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • March 1, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • March 8, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • March 15, 2018: TBD
    Cecilia Bitz
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room
  • March 22, 2018: TBD
    Formal Seminar
    TBD
    Time: 2:00 pm - 3:00 pm
    Location: Smagorinsky Seminar Room

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