The vertical wind on the mountain slope was estimated by the difference between observed fall-velocity and experimental fall-velocity using the disdrometer data. There were measured updraft and downdraft winds at the near coastal region. The downdraft (updraft) was dominant at the highest site (which was installed around the mountain region). The correlation between the vertical wind, mass-weighted diameter (Dm) and normalized intercept parameter (Nw) were examined. The Dm and Nw in the time period of updraft (downdraft) were 1.2 (0.8) mm and 8681 (17352) mm-1m-3 at the sites on the slope of mountain. The Dm and Nw at the top of mountain (at the coastal) site were 1.08 (1.39) mm and 9719 (4920) mm-1m-3in the updraft (downdraft) region.
The vertical wind measured by parsivel was validated by the wind fields obtained by dual Doppler analysis and ultrasonic anemometer measurement. We will all also present the DSDs characteristics with respect to the vertical winds more detail.
This work was funded by the Korea Meteorological Industry Promotion Agency under Grant KMIPA 2015-1050.
This work was financially supported by the BK21 plus Project of the Graduate School of Earth Environmental Hazard System.