the bathymetry of the central mediterranean sea in the ... · pdf fileoutline...

The Bathymetry of the Central Mediterranean Sea in the framework of

the EMODnet projecta case study of bathymetric data

integration and processing.

Federica Foglini & Marzia RovereCNR-ISMAR – Institute of Marine Science

GEBCO Science Day 2011 – La Jolla 4th October 2011.

OUTLINE•Introduction – Overview of CNR-ISMAR Database

•Bathymetric data collection and processing

•The Bathymetry of the Adriatic sea – single beam and multi beam data integration case study

•ISMAR in EMODnet - DTM production and GEBCO data integration

•EMODnet products in the Central Mediterranean sea

•WHY BATHYMETRY? - some examples of application in Oceanography, Geology and Geohazard assessment, habitat

mapping

•Conclusions

CNR-ISMAR Database

From 1991 to 2011 ISMAR collected

about 113.500 km of seismic profile and bathymetric

data on board R/V STRAKHOV

URANIA

CNR-ISMAR Database

•SB Atlas Deso25•Reson 8160 (50

kHz)•Konsberg EM300

(30 kHz)•Kongsberg

EM710 (70–100 kHz)

•Konsberg EM3000 (300 kHz)

• Konsberg EM3002 (293 kHz, 300 kHz,

307 kHz)• Reson 8125 (455

kHz)•Geoswath Plus

(500 kHz)

CNR-ISMAR Database

•EUROSTRATAFORM(European Strata Margin

formation)

•HERMIONE (Hotspot Ecosystem Research and

Man's Impact On European Seas)

•HERMES Hot Spot Ecosystem Research on the Margins of European

Seas

•CARTOGRAPHY OF ITALIAN SEAS

•MAGIC (MArine Geohazards along the

Italian Coasts)

•MAGIC ProjectAn integrated research project for acquiring high-resolution morphobathymetry and producing geohazard maps of the

continental margins of Italy

CNR-ISMAR DATA COLLECTION

60m

GeoSwath 500 kHz

DTM 0.5m

CNR-ISMAR DATA COLLECTION

DTM RESOLUTION

5M

EM3000

CNR-ISMAR DATA COLLECTION

DTM RESOLUTION

20 m

RESON 8160

CNR-ISMAR DATA COLLECTION

DTM RESOLUTION

20 m

TWIN SLIDES

CNR-ISMAR DATA COLLECTION

DTM RESOLUTION

50M

EM1220 Km

N

CNR-ISMAR DATA COLLECTION

N

4 kM

DTM RESOLUTION25 m

EM3002D (10-150m)EM710 (150-500)

EM 12 (>500)

DATA PROCESSING – Features Detection

DATA INTERPRETION AND ACCURATE MANUAL

CLEANING

DATA ANALYSIS AND ERROR DETECTION

ADRIATIC SEA - SB and MB DATA INTEGRATION

Single Beam echo soundings

SB interpretation and processing

Variable density XYZ soundings

Multi Beam swath bathymetry

Multi beam Data Processing for single surveys

High density xyz soundings

Import SB and MB Soundings

Variable resolution Tuning filters

Variable Epsilon model (TIN)

Export final uniform GRID

600,000550,000500,000450,000400,000350,000300,000250,000200,000150,000100,00050,0000

-50

-100

-150

-200

-250

-300

-350

-400

-450

-500

-550

-600

-650

-700

-750

-800

-850

-900

-950

-1,000

-1,050

-1,100

-1,150

Venice

Pescara

Bari

THE ADRIATIC SEA -SB and MB DATA INTEGRATION

Variable resolution Tuning filters

Variable Epsilon model (TIN)

DTM 200m

THE ADRIATIC SEA -SB and MB DATA INTEGRATION

THE ADRIATIC SEA - SB and MB DATA INTEGRATION

Import SB and MB Soundings

Export final uniform GRID

Variable resolution Tuning filters

Variable Epsilon model (TIN)

EMODnet - Central Mediterranean seaDTM Regional Coordinator

EMODnet DTM procedure of production

.XYZprecessedsoundings

from different sources

Smoothing

Final DTM

1/4 arc-minute DTM

Gebco 30 arc-second integration

1/16 arc-minute DTM

CDI production

Depth is calculated for

each elementary

polygons where soundings

exists

1/16 DTM7 values

EMODnet - Central Mediterranean sea

FINAL DTM 10 values

1.Depth MIN2.Depth MAX

3.Depth Average4.Depth STD

5.Interpolation6.Elementary

surface7.Depth smoothed8.Depth smoothed

offset9.CDI ID

10.DTM SOURCE

EMODnet - Central Mediterranean sea

EMODnet - Central Mediterranean sea

WHY BATHYMETRY??

•Oceanography

•Geology and Geohazard assessment

•Habitat mapping

SOME EXAMPLESBy

Marzia Rovere

BACKSCATTER

MATTE POSIDONIA

SAND POSIDONIA

MAERL

SCATTERED GRASSLAND ON SAND

CORALLIGENOUSBIONOMICS CHART

SAND

8 km

Posada braided river

underwater shelf

edge delta22 km

10 km

4 km

4 km

5 km

Near shore canyons: Niceto Canyon oil refinery plant in Milazzo

Near shore canyons: Gioiosa Marea Touristic place

CONCLUSIONS

CNR-ISMAR collected huge amount of bathymetric data in the Central Mediterranean Sea in the framework on National and

European projects.

Bathymetric data processing and merging is one of the main challenge because of different data sources, systems, resolution

and water depth

CNR-ISMAR is able to make the bathymetric data available to the global community in the framework of EMODnet, following

EMODnet QA/QC Standard

Bathymetry is fundamental for many scientific issues and applications from oceanography to geology