[Eoas-seminar] COAPS Short Seminar Series

[eoas-seminar at lists.fsu.edu]

COAPS Short Seminar Series
11:00 AM August 5th
Attend F2F (in 255 Research A) or Virtually (via Zoom)
https://fsu.zoom.us/j/92268262553

Meeting ID: 922 6826 2553
Talks are 12 minutes long with an additional 8 minutes for questions.

Diurnal cycle of precipitation over the Gulf Stream simulated by a regional atmospheric model
By Givo Alsepan
Description: Recent observational studies have revealed an exceptionally strong precipitation diurnal cycle during the boreal summer over the Gulf Stream. Diurnal peaks tend to occur in the early to late morning, with an oceanward phase propagation like what is commonly found in the tropics. But other critical factors such as wind and temperature distribution remain unexplored, leaving a knowledge gap in our understanding of the complete structures of the diurnal cycle and the mechanisms involved. Here, we conduct a numerical simulation for the first time on the diurnal cycle of precipitation over the Gulf Stream using a regional atmospheric model. In general, the main features of the precipitation diurnal cycle are well simulated, including the oceanward phase propagations induced by the gravity wave. The precipitation diurnal cycle is essentially coherent with the diurnal variations of the wind in the low-, mid-, and upper-troposphere, suggesting that the diurnal cycle has a deep vertical structure. Additionally, a sensitivity experiment by reducing the SST by 5K over the whole model domain reveals that the warm SST brought by the Gulf Stream from the tropics is important in generating the diurnal cycle in the atmosphere.

Science Goals Related to Spray Modification of Hurricane Winds and Turbulent Fluxes
By Amelia Bryan
Description: This project builds on the work of a previous masters student, Danny Wallace who used data collected from dropsondes in tropical cyclones to conduct a log-profile analysis for wind speed, potential temperature, and humidity in order to estimate surface fluxes of momentum, sensible heat, and latent heat. This project works toward improving these estimates by improving the estimations of roughness length.
Height Adjustment of IWRAP Wind Speed: Analyzing Boundary Layer Assumptions and Near-Surface Vertical Wind Profiles in Atlantic Tropical Cyclones

Height Adjustment of IWRAP Wind Speed: Analyzing Boundary Layer Assumptions and Near-Surface Vertical Wind Profiles in Atlantic Tropical Cyclones
by Maggie Zoermer
Description: This project assesses the height adjustment of IWRAP (Imaging Wind and Rain Airborne Profiler) wind speed measurements from various altitudes in Atlantic tropical cyclones, considering different boundary layer assumptions. A secondary objective is to investigate the patterns of near-surface vertical wind profiles and associated features to enhance understanding of the dynamics in the boundary layer.

NOTE: Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend.
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