Small Scale phenomena in Mediterranean and Adriatic seas: Meteorological Tsunamis EV2 Lafon Amaury EV2 Macheboeuf Loïc

Contents 1. Meteorological tsunamis 2. Materials and Methods 2.1 Sea level to sea height 2.2 Detetecting event 3.3 Summary 3. Analysis 3.1 Sea level analysis 3.2 Sea height analysis 4. General events 5.General synoptics 5.1 Spain 5.2 Sicily 6.Specific events Conclusion What are the atmospheric processes hold responsible for meteorological tsunamis in the western part of the Mediterranean Sea?

Meteotsunamis An atmospheric disturbance with quick pressure jumps a harbor, a bay or an inlet with the high Q- factor A set of two resonances (external and internal resonances) 1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5.General synoptics 6.Specific events Conclusion

Pre-processing (overlapping and missing data, unrealistic peaks, de-tided, linearly interpolated and 4-hour period Keiser-Bessel window filtered) Sea height Area of study: Mediterranean Seas. 4 areas established upon geographical considerations A B C D 1. Meteorological tsunamis 2. Materials and Methods 2.1 Sea level to sea height 2.2 Detetecting event 3.3 Summary 3. Analysis 4. General events 5.General synoptics 6.Specific events Conclusion

Criteria of selection: Maximum height of event Duration of event At least 3 station have to record the event 1. Meteorological tsunamis 2. Materials and Methods 2.1 Sea level to sea height 2.2 Detetecting event 3.3 Summary 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion

84 tide gauge stations Sea level downloaded from IOC sea level monitoring website. 72 tide gauge stations used Multimodal correlation 36 possible events chosen multisite aggregation 33 events analyzed Synoptic condition downloaded from ECMWF ERA- interim website MSLP, 850hPa temperature, 500hPa wind and Richard number 1. Meteorological tsunamis 2. Materials and Methods 2.1 Sea level to sea height 2.2 Detetecting event 3.3 Summary 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion

Most of event in the Mediterranean Sea occurred during summer time. One phenomenon is to be observed:  Extreme peaks moves downtime as we go eastward. 1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 3.1 Sea level analysis 3.2 Sea height analysis 4. General events 5.General synoptics 6. Specific events Conclusion

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion

 2 high-risk regions highlighted 1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5. General synoptics 5.1 Spain 5.2 Sicily 6.Specific events Conclusion Mean Synoptic Conditions

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5. General synoptics 5.1 Spain 5.2 Sicily 6.Specific events Conclusion Mean Anomalies

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5. General synoptics 5.1 Spain 5.2 Sicily 6.Specific events Conclusion Mean Synoptic Conditions

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5. General synoptics 5.1 Spain 5.2 Sicily 6.Specific events Conclusion Mean Anomalies

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion

1. Meteorological tsunamis 2. Materials and Methods 3. Analysis 4. General events 5.General synoptics 6. Specific events Conclusion Extreme peaks move downtime as we move to the East. Some differences between areas: change of MSLP, depending of seasons. Same atmospheric processes that can lead to meteorological tsunamis govern all the strongest events and most of other high-frequency sea level oscillations in the western part of the Mediterranean Sea: Atmospheric Gravity Waves