2017 Volume 73 Issue 2 Pages I_493-I_498
On 30 August 2016, Typhoon Lionrock (2016) moving northwestward made a landfall at the Pacific side of the Tohoku district, Japan, in which there were no records of typhoon landfalls since statistics started in 1951. In order to investigate the mechanisms of Lionrock taking unique pathway, the stearing currents induced by each of potential vorticity (PV) anomalies surrounding Lionrock were estimated by an analysis of the piecewise PV inversion in this study. At 1200UTC 30 August 2016 when Liorock just made landfall around Ofunato City, Iwate, Japan, the analysis suggested that Lionrock moved northwestward by the southeasterly wind with a wind speed of about 20 m/s, which was induced by three different surrounding PV anomalies: 1) an upper-level dry positive PV anomaly originating from an upper cold low, 2) a low-level wet positive PV anomaly developed by cumulus convections under the upper cold low, and 3) an upper-level wet negative PV anomaly intensified by cumulus convections.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
