Three Dimensional Wind Field Retrieved by UHF Wind Profiler Radar Network

The three-dimensional wind field (WPR3D) and the multiple WPR3D (M-WPR3D) was derived from observations made by a network of eight wind profiler radars (WPR) being operated by the Korea Meteorological Administration. The effectiveness of the WPR3D was diagnosed through the analysis field of a numerical model, local data assimilation and predication system (LDAPS), and the accuracy of M-WPR3D was validated by comparing the trajectory of the radiosonde. The 3D wind field allows determination of the Lagrangian trajectory at any point and time of the domain, as the trajectory requires wind speed as a function of time and distance. The advantage of profiler-based trajectories from the wind profile 3D network provides a description of weather patterns at a finer time-scale than operational upper-air balloon soundings. Therefore, trajectories obtained in this study from the wind profiler 3D network are more accurate than those produced from numerical model initialization fields. The movement trajectory of an air mass with time can be calculated using the constant acceleration solution. This trajectory is compared with the radiosonde trajectory and used as a means for quantitative verification. The rising velocity of the air mass and balloon was not considered and the horizontal movement trajectory of the air mass was calculated with the altitude of the radiosonde. The air trajectory calculated from M-WPR3D was very similar to the radiosonde trajectory. The air trajectory calculated from M-WPR3D was overlapped the radiosonde trajectory. The result of this study shows that the severe weather can be effectively analyzed using a 3-dimensional wind field generated on the basis of remote sensing network.

Acknowledgments

This work was funded by the Korea Meteorological Administration Research and Development Program under grant KMI2018-06310 and by the BK21 plus Project of the Graduate School of Earth Environmental Hazard System.