4:15 PM - 4:30 PM
[AAS01-10] Numerical investigation of the response of idealized tropical cyclones to perturbations in sea surface water vapor flux
Keywords:Typhoon, Numerical Simulation, Evapolation, Tropical Cyclone
A project ”Moonshot Goal 8” was established to study the possible weakening of typhoon intensity due to artificial interventions supported by Japan Science and Technology Agency.
We are considering how to reduce sea surface water vapor flux to suppress the intensification of tropical cyclones (TC).
Thus, we are developing the surfactant to be sprayed under or around TC.
Despite the importance of the flux in typhoon development, there is a scarcity of research that has examined the impact of altering the flux or the area of modification.
Therefore, this study aims to investigate the relationships between sea surface water vapor flux and TC intensification under the numerical simulations to verify the possibility of modification.
We conducted idealized numerical experiments by embedding vortices in tropical environments.
In this study, sensitivity experiments with directly changing sea surface water vapor flux around the vorticity were conducted by the Scalable Computing for Advanced Library and Environment (SCALE) with 5 km horizontal resolution.
We tested the control run and sensitivity experiments in which water vapor flux decreased various suppression rates every timesteps and changed area from 25km radius to 200km.
The resultant intensification of the vortices was sensitive.
Suppression of sea surface water vapor flux with an intervention radius of 50 km or less, had little to no impact on TC intensification.
These results suggest that even when suppressing moisture supply inside the eyewall, the radius of maximum wind, TCs can still develop due to moisture advection from the outer region.
We have observed several other correlations between the radius and the suppression rate, and we will discuss these results.
We are considering how to reduce sea surface water vapor flux to suppress the intensification of tropical cyclones (TC).
Thus, we are developing the surfactant to be sprayed under or around TC.
Despite the importance of the flux in typhoon development, there is a scarcity of research that has examined the impact of altering the flux or the area of modification.
Therefore, this study aims to investigate the relationships between sea surface water vapor flux and TC intensification under the numerical simulations to verify the possibility of modification.
We conducted idealized numerical experiments by embedding vortices in tropical environments.
In this study, sensitivity experiments with directly changing sea surface water vapor flux around the vorticity were conducted by the Scalable Computing for Advanced Library and Environment (SCALE) with 5 km horizontal resolution.
We tested the control run and sensitivity experiments in which water vapor flux decreased various suppression rates every timesteps and changed area from 25km radius to 200km.
The resultant intensification of the vortices was sensitive.
Suppression of sea surface water vapor flux with an intervention radius of 50 km or less, had little to no impact on TC intensification.
These results suggest that even when suppressing moisture supply inside the eyewall, the radius of maximum wind, TCs can still develop due to moisture advection from the outer region.
We have observed several other correlations between the radius and the suppression rate, and we will discuss these results.