Weather Modification Simulation of Line-Shaped Convective System Torrential Rainfall by Introducing Offshore Curtain

Abstract

There is concern that heavy rainfall is becoming more serious as global warming progresses, and it is hoped that heavy rainfall can be mitigated through weather control. Therefore, we would like to consider developing a weather control device as a wind resistor (i.e., Offshore Curtain) by raising a huge kite over the ocean and suspending a huge curtain-like membrane body on the kite. The objective of this study is to investigate whether it is possible to suppress heavy rainfall by manipulating winds to simulate Offshore Curtain through numerical simulations. The meso-scale meteorological model CReSS (Tsuboki and Sakakibara, 2002) was used for the numerical simulation of the heavy rainfall. The results indicate that the maximum intensity of line shaped convective rainfall can be reduced by up to 34%. In addition, sensitivity experiments were conducted by varying the altitude and horizontal position of the Offshore Curtain, and the rainfall suppression effect varied from -34.0% to +19.2%.