Correlation between underwater noise level and AIS data
Correlation between underwater noise level and AIS data in the Gulf of Catania (Sicily) Sara Pulvirenti spulvirenti@lns. infn. it Erice International School of Ethology CETACEAN ECOLOCATION – OUTER SPACE NEUTRINOS Salvatore Viola, INFN-LNS VLVn. T 13 Erice, Sicily (Italy) – October 18 - 21, 2013, Stockholm – 05/08/2013
SN 1 -EMSO - SMO Titolo and Argomento The SMO acoustic antenna works in synergy with smaller-size detectors that have been placed in the LNS submarine site offshore Catania, in the framework of the EU project EMSO (see Francesco Simeone and Paolo Favali presentations). Installed at 2100 m depth INGV SN 1 -EMSO CATANIA 5 LNS Test Site Laboratory at the port of Catania 20 km 5 4 SMID hydrophones (96 k. Hz/24 bit) + INGV geophysical sensors km km POWER FRAME INFN - LNS See at http: //www. emso-eu. org Sara Pulvirenti EMSO - SMO Installed at 2100 m 4 SMID hydrophones (192 k. Hz/24 bit) Erice, 18/10/2013 1
Seismic SMID Hydrophone DT-405 D(V)1 Sensitivity curves: - Sampling frequency of 2 k. Hz High Gain Channel + 60 d. B Low Gain Channel + 30 d. B - Hydrophone Dimensions 89 x 150 nm Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20132
Acoustic data – Statistical analysis in 1/3 octave bands Available data Set: 2012/06 – 2013/05. Analysed data set: 2012/09 – 2013/02 Continuous recordings divided in files of 10 minutes. Average power spectral density (Nfft =2^14) calculated for each file - 1/3 octave bands. ARY MIN I L E R P YIELDS 26050 Recordings (10’) Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20133
Acoustic data – Statistical analysis in 1/3 octave bands Available data Set: 2012/06 – 2013/05. Analysed data set: 2012/09 – 2013/02 Continuous recordings divided in files of 10 minutes. Average power spectral density (Nfft =2^14) calculated for each file - 1/3 octave bands. ARY MIN I L E R P YIELDS 26050 Recordings (10’) Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20133
Acoustic data – Statistical analysis in 1/3 octave bands 1/3 Octave Bande From 44. 7 to 56. 2 Hz 1/3 Octave Bande From 70. 8 to 89. 1 Hz 1/3 Octave Bande From 112 to 141 Hz Sara Pulvirenti Salvatore Viola, INFN-LNS 1/3 Octave Bande From 56. 2 to 70. 8 Hz 1/3 Octave Bande From 89. 1 to 112 Hz 1/3 Octave Bande From 141 to 178 Hz 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20134
Ambient sound pressure level in 1/3 octave bands Comparing our dataset to litterature, SN 1 measurements have been compared with the Wenz curves related to traffic noise. (Knudsen et al. , 1948; Wenz, 1962; reviewed in. Urik, 1983) ARY MIN PRELI Legend: 5 th percentile 25 th percentile Median 75 th percentile 95 th percentile HEAVY SHIPPING TRAFFIC MEDIUM SHIPPING TRAFFIC LOW SHIPPING TRAFFIC WIND SPEED - 5 KNOTS WIND SPEED - 10 KNOTS Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20135
AIS data acquisition at LNS laboratory The Automatic Identification System (AIS) is an automatic tracking system used by ships for identify and locate vessels. It gives information such as position, mmsi, speed. INFN – LNS CATANIA Displaying data in real time on Google map web page LNS STORAGE INGV DATABAS E Off – line analysis Sara Pulvirenti Erice, 18/10/2013 6
AIS statistical analysis CATANIA HARBOUR MMSI Example of daily tracks within 18 km SN 1 -EMSO coordinates: 29 of November 2012 (using Matlab scripts) Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20137
AIS data correlation with acoustic data t 1 d. B re 1 u. Pa^2/Hz nfft = 2^10 Overlap = 50% Daily spectrogram of 29 th of November 2012 t 2 MMSI: 304183000 Integrated noise from 44. 8 Hz to 178 Hz MMSI: 247197000 MMSI: 271000742 MMSI: 538090215 MMSI: 247190400 MMSI: 312020000 MMSI: 248939000 MMSI: 249403000 Distance from. SN 1 -EMSO [km] MMSI: 247199000 MMSI: 247323100 MMSI: 312459000 Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20138
AIS data correlation with acoustic data Spectra from different vessels have been studied: MMSI: 247323100 (CARGO) 20/26050 records MMSI: 247190400 (TANKER) 25/26050 records MMSI: 247335000 (PASSENGER) 25/26050 records Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 VLVn. T 13 Erice, , Stockholm – 05/08/20139
AIS data correlation with acoustic data 18 -02 -2013 MMSI: 247323100 MMSI: 247190400 (CARGO) (TANKER) SPEED OVER GROUND 15 knots DISTANCE FROM SN 1 0, 369 km from SN 1 -EMSO coordinates SPEED OVER GROUND 17, 7 knots 0, 149 km from SN 1 -EMSO coordinates d. B re 1 u. Pa^2/Hz nfft = 2^13 Overlap = 95% Sara Pulvirenti Salvatore Viola, INFN-LNS 18 -12 -2013 18/10/2013 10 VLVn. T 13 Erice, , Stockholm – 05/08/2013
Conclusion • We installed SN 1 -EMSO offshore Catania, a preliminary analysis < 1 k. Hz has been performed. This data will be compared with acoustic data from SMO acoustic antenna in Portopalo (see R. Grasso poster) and SMO-EMSO station in a range < 96 k. Hz. • A correlated study between acoustic data from a calibrated hydrophone (2100 m depth) and AIS information allow to analyse the acoustic noise in the area of the Gulf of Catania. The strength of the system is the possibility to develop predict model in order to predict the ambient noise in places where there are no underwater sensors. • Future steps -> This analysis is a preliminary study for CABIRIA and EMSO projects to evaluate the contribution of shipping noise to the marine enviroment. Sara Pulvirenti Salvatore Viola, INFN-LNS 18/10/2013 12 VLVn. T 13 Erice, , Stockholm – 05/08/2013
Conclusion 16 -02 -2013 PASSENGER MMSI: 247335000 0, 061 km from SN 1 -EMSO coordinates Y nfft = 2^13 Overlap = 95% Sara Pulvirenti Salvatore Viola, INFN-LNS E S CA OF D U T S 18/10/2013 11 VLVn. T 13 Erice, , Stockholm – 05/08/2013
Grazie 15 Sara Pulvirenti Salvatore Viola, INFN-LNS Erice, – 18/10/2013 VLVn. T 13 , Stockholm 05/08/2013
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