Misumi, R., N. Sakurai, T. Maesaka, S.-I. Suzuki, S. Shimizu, and K. Iwanami, 2018: Transition process from non-precipitating cumuli to precipitating convective clouds over mountains:
Observation by Ka-band Doppler radar and stereo photogrammetry. J. Meteor. Soc. Japan, 96A, 51-66.
https://doi.org/10.2151/jmsj.2017-021 Graphical Abstract with highlights
- Convective storms are frequently initiated over mountains under weak synoptic forcing conditions. However, the initiation process of such convective storms is not well understood due to a lack of observations, especially of the transition process from non-precipitating cumuli to precipitating convective clouds.
- During the transition process, weak radar echoes observed by the Ka-band radar rose to the higher level and radar reflectivity rapidly increased (E7 in Fig. 13). This phenomenon suggests that drizzle particles produced in a pre-existing convective cloud were lifted by a newly developed updraft, and raindrops were formed rapidly by coalescence of the drizzle particles and cloud droplets.