Tuesday september 4, 2007 h. 18.00-18.20
Title: Meteotsunami detection in Adriatic and Tyrrenian sea
Author: Costantino Sigismondi
Local atmospheric pressure variations of 1 hPa produce sea level changes of 1 cm which start to propagate like shallow water waves.
Meteotsunami are such long waves originated by atmosferic
Such waves in semi-enclosed seas or lakes become oscillating seiches with frequency dependent on basin's geometry.
Summer seiches activity in central Adriatic and Tyrrenian sea
is larger than tidal variation of sea surface on timescales shorter than one hour.
We adapetd ultrasonic detectors with acquisition rate of 100 data per minute to monitor the elevation of sea surface.
Our datasets lasting up to three hours recorded in June-September 2007 are analyzed in order to understand the dynamics of those long waves.
Long Waves detected in Ostia Lido (Roma) on August 25, 2007
X scale time [minutes] 0=18:45: Y scale water level [cm] 0=detector position