[MIS02-P01] Volcanic ash plume observation by weather radars
Keywords:volcanic ash plume, weather radar, polarimetric radar, fast-scan radar, Sakurajima volcano
In such a circumstance, it is expected that polarimetric weather radar can obtain information about the PSD inside volcanic ash plume. Generally, polarimetric radars transmit horizontal and vertical radio waves at the same time, and receive the backscattered waves, thus, we can get the ratio and the correlation coefficient of two components. We think these parameters are effective for QAE.
Another way we think effective for observing volcanic ash plume is a fast-scan radar. As fast-scan radars can get a 3D image of a volcanic ash plume in a moment, we believe that this kind of radars can contribute to better understanding of dynamics of volcanic ash plume.
Meteorological Research Institute (MRI) installed an X-band multi-parameter (polarimetric) radar (MRI-XMP) and a Ku-band fast-scan radar (MRI-Ku) near Sakurajima volcano, and started observation from March, 2016. In this presentation, we will present some cases of volcanic ash plume observed by these radars, and discuss the problems and the prospects of the future.
Sawada, Y., 2003: Record of eruption cloud echoes measured with weather radars, Weather Service Bulletin, 70.4, 119-169 (in Japanese).
Marzano, F. S., E. Picciotti, M. Montopoli, and G. Vulpiani, 2013: Inside volcanic clouds: Remote sensing of ash plumes using microwave weather radars, Bull. Amer. Meteor. Soc., 94, 1567–1586, DOI: 10.1175/BAMS-D-11-00160.1.