Small Scale phenomena in Mediterranean and Adriatic seas: Meteorological Tsunamis
EV2 Lafon AmauryEV2 Macheboeuf Loïc
Contents
1. Meteorological tsunamis2. Materials and Methods
2.1 Sea level to sea height2.2 Detetecting event3.3 Summary
3. Analysis3.1 Sea level analysis3.2 Sea height analysis
4. General events5. General synoptics
5.1 Spain5.2 Sicily
6. Specific eventsConclusion
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 tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
• 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 tsunamis2. Materials and Methods
2.1 Sea level to sea height2.2 Detetecting event3.3 Summary
3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
Criteria of selection:• Maximum height of event• Duration of event• At least 3 station have to record the event
1. Meteorological tsunamis2. Materials and Methods
2.1 Sea level to sea height2.2 Detetecting event3.3 Summary
3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
84 tide gauge
stations
• Sea level downloaded from IOC sea level monitoring website.
72 tide gauge
stations used
• Multimodal correlation
36 possib
le events chose
n
• multisite aggregation
33 events analyze
d
• Synoptic condition downloaded from ECMWF ERA-interim website
• MSLP, 850hPa temperature, 500hPa wind and Richard number
1. Meteorological tsunamis2. Materials and Methods
2.1 Sea level to sea height2.2 Detetecting event3.3 Summary
3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
• 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 2 3 4 5 6 7 8 9 10 11 120
2
4
6
8
10
12
area Aarea Barea Carea Dall stations
month
N°
1. Meteorological tsunamis2. Materials and Methods3. Analysis
3.1 Sea level analysis3.2 Sea height analysis
4. General events5. General synoptics6. Specific eventsConclusion
N° of event Name of stations date Height recorded Station recording the maximum height Maximum height
4
Catania
27/03/2014
0,1492
Ortona 0,2347
Messina 0,1513
Crotone 0,0567
Otranto 0,2297
Bari 0,1487
Vieste 0,1387
Ortona 0,2347
Taranto 0,1023
5
Porto empedocle
11/04/2012
0,3548
Porto empedocle 0,3548 Lampedusa 0,3364
Palermo 0,1361
Napoli 0,2713
Centuri 2 0,0157
13
Solenzra2
20/11/2013
0,2126
Ginostra (Isola di Stromboli) 0,6765
Ajaccio 2 0,0968
Centuri 2 0,484
nice 0,1121
Ginostra (Isola di Stromboli) 0,6765
Palermo 0,2083
Lampedusa 0,1156
Porto empedocle 0,2948
17
Solenzra2
04/07/2014
0,307
Anzio 0,3638
Ajaccio 2 0,1152
Ile rousse 2 0,2068
Centuri 2 0,3021
Genova 0,1312
La Spezia 0,2162
Livorno 0,0127
Anzio 0,3638
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
2 high-risk regions highlighted
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics
5.1 Spain5.2 Sicily
6. Specific eventsConclusion
Mean Synoptic Conditions
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics
5.1 Spain5.2 Sicily
6. Specific eventsConclusion
Mean Anomalies
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics
5.1 Spain5.2 Sicily
6. Specific eventsConclusion
Mean Synoptic Conditions
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics
5.1 Spain5.2 Sicily
6. Specific eventsConclusion
Mean Anomalies
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General synoptics6. Specific eventsConclusion
1. Meteorological tsunamis2. Materials and Methods3. Analysis4. General events5. General
synoptics6. Specific eventsConclusion
• 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