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Dataset Title: | NOAA-Navy Sanctuary Soundscape Monitoring Project, North Atlantic Right Whale Sound Production, Gray's Reef, SanctSound_GR01_02_northatlanticrightwhale_1d |
Institution: | NOAA (Dataset ID: noaaSanctSound_GR01_02_northatlanticrightwhale_1d) |
Information: | Summary | License | ISO 19115 | Metadata | Background | Files | Make a graph |
Attributes { start_time { Float64 actual_range 1.5566688e+9, 1.5689376e+9; String axis "T"; String comment "Start time of detections. Corresponding end time for detection in end_time_var at same index value as start_time_var."; String ioos_category "Time"; String long_name "Start Time"; String standard_name "time"; String time_origin "01-JAN-1970 00:00:00"; String time_precision "1970-01-01T00:00:00.000Z"; String units "seconds since 1970-01-01T00:00:00Z"; } northatlanticrightwhale_presence { String cell_methods "time: sum (comment: presence (1) or absence (0) over time interval)"; String comment "Presence of North Atlantic Right Whale (0 = not present; 1 = present)"; String ioos_category "Statistics"; String long_name "north atlantic right whale presence"; String standard_name "northatlanticrightwhale_presence"; String units "boolean"; } end_time { Float64 actual_range 1.5567552e+12, 1.569024e+12; String axis "T"; String comment "End time of detections. Corresponding start time for detection in start_time_var at same index value as end_time_var."; String ioos_category "Time"; String long_name "End Time"; String standard_name "end_time"; String time_origin "01-JAN-1970 00:00:00"; String units "seconds since 1970-01-01T00:00:00Z"; } NC_GLOBAL { String abstract "This record represents North Atlantic right whale (NARW) sound production detected from raw passive acoustic data. The Low Frequency Detection and Classification System (LFDCS) call library for right whale low-frequency modulated upsweep (upcall) was used for the data. All NARW upcall detections with a Mahalanobis distance less than or equal to 3.0 were manually screened due to variability in NARW upcalls and overlap with other species’ vocalizations, such as upsweeps produced by humpback whales. A given day was marked as having NARWs present if three or more true upcall detections. These data were recorded at SanctSound Site GR01_02 between May 01, 2019 and September 20, 2019."; String acknowledgement "This project received funding from the U.S. Navy."; String cdm_data_type "TimeSeries"; String citation "Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2021. North Atlantic Right Whale Sound Production Recorded at SanctSound Site GR01_02, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/6x6z-6w74"; String comment "Data quality: A 20 Hz high pass filter is integrated into the instrument; thus, data below 20 Hz is reduced in ampitude and uncalibrated. There are known data gaps from 2019-06-28 10:39:45 UTC to 2019-06-28 10:44:19 UTC and 2019-08-25 13:37:43 UTC to 2019-08-25 13:42:19 UTC. The fixed hydrophone mooring was impacted by Hurricane Dorian on September 4th, 2019, resulting in the hydrophone to be turned over and in contact with the seafloor. For the remainder of the deployment after 2019-09-04 22:56:00 UTC, sound levels (received levels) in frequencies above 1 kHz were reduced and may differ from what would be expected if the hydrophone mooring remained upright."; String contributor_name "Simone Baumann-Pickering, Scripps Institution of Oceanography; Leila Hatch, NOAA Stellwagen Bank National Marine Sanctuary; John Joseph, U.S. Naval Postgraduate School; Anke Kuegler, Hawai'i Institute of Marine Biology, University of Hawai'i at Manoa; Marc Lammers, NOAA Hawaiian Islands Humpback Whale National Marine Sanctuary; Tetyana Margolina, U.S. Naval Postgraduate School; Karlina Merkens, NOAA Pacific Islands Fisheries Science Center; Lindsey Peavey Reeves, NOAA Channel Islands National Marine Sanctuary; Timothy Rowell, NOAA Northeast Fisheries Science Center; Jenni Stanley, Woods Hole Oceanographic Institution; Alison Stimpert, Moss Landing Marine Laboratories; Sofie Van Parijs, NOAA Northeast Fisheries Science Center; Eden Zang,NOAA Hawaiian Islands Humpback Whale National Marine Sanctuary"; String contributor_role "Principal Investigator"; String Conventions "COARDS, CF-1.6, ACDD-1.3"; String creator_email "ncei.info@noaa.gov"; String creator_name "NOAA NCEI"; String creator_url "https://www.ncei.noaa.gov/"; String date_created "2022-08-22"; String date_issued "2022-08-22"; String featureType "TimeSeries"; String geospatial_bounds "POINT (31.396417 -80.8904)"; String history "All acoustic data were processed using the Low Frequency Detection and Classification System (LFDCS; Baumgartner and Mussoline, 2011), which creates conditioned spectrograms using a short-time Fourier transform with a data frame of 512 samples and 75% overlap (80% overlap for the 120 Hz decimated data (blue and fin whales)), resulting in a time step of 64 ms and frequency resolution of 3.9 Hz (for 120 Hz data: 853 ms time step and 0.23 Hz frequency resolution). After tracing contour lines, or “pitch tracks”, through tonal sounds, the program uses multivariate discriminant function analysis to classify the pitch tracks into species-specific call types based on a call library. Each detection is assigned a Mahalanobis distance (MD), which measures the deviation of a sound’s pitch track from the assigned call type (see Baumgartner and Mussoline (2011) for a more complete description). A lower MD indicates a closer match to the assigned call type. For a well-developed call type in the LFDCS (i.e., the seven attributes used in the discriminant function analysis are multivariate normal), 75% of pitch-tracks for the call type will have a MD of 3.0 or less (Baumgartner et al., 2013). Setting a MD threshold is necessary to minimize the false detection rates, but in doing so causes some true detections to be missed in the analysis. The MD threshold of 3.0 was chosen for all vocalizations detected and classified in the humpback, sei, and fin whale call library. However, for blue whales, false detection rates were lower than any of the other species, thus a MD of 5.0 was chosen to decrease the probability of missing true detections. All LFDCS detections were manually reviewed by trained acoustic analysts to determine daily presence of each of the four baleen whale species. A true detection was defined as a pitch track that correctly classified a call or song unit to the species that produced it (Bonnell et al., 2016). Given the variability of each species' call type, the specific methodology to determine daily acoustic presence was different for each species. The LFDCS call library for right whale low-frequency modulated upsweep (upcall) was used for the data. All North Atlantic Right Whale (NARW) upcall detections with a MD less than or equal to 3.0 were manually screened. The high degree of variability in NARW upcalls and the overlap with other species’ vocalizations, such as upsweeps produced by humpback whales, necessitated this extra manual step in data processing. A given day was marked as having NARWs present if three or more true upcall detections. Data were processed with LFDCS 2024-12-03T18:16:03Z (local files) 2024-12-03T18:16:03Z https://coastwatch.pfeg.noaa.gov/erddap/griddap/noaaSanctSound_GR01_02_northatlanticrightwhale_1d.das"; String id "http://doi.org/10.25921/6x6z-6w74"; String infoUrl "https://ncei.noaa.gov"; String institution "NOAA"; String instrument "SoundTrap ST500"; String keywords "acoustic attenuation/transmission, acoustics, ambient noise, aquatic ecosystems, cetacean, environmental, fish, frequency, intensity, marine environment monitoring, marine habitat, national centers for environmental information, Navy, NOAA, ocean acoustics, oceans, office of national marine sanctuaries, passive acoustic recorder, pressure, sound_intensity_level_in_water, soundscapes"; String keywords_vocabulary "GCMD Science Keywords"; String license "The data may be used and redistributed for free but are not intended for legal use, since it may contain inaccuracies. Neither the data creator, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information."; String naming_authority "NOAA-Navy"; String project "NOAA-Navy Sanctuary Soundscape Monitoring Project"; String publisher_email "erd.data@noaa.gov"; String publisher_name "NOAA NMFS SWFSC ERD"; String publisher_type "institution"; String publisher_url "https://www.pfeg.noaa.gov"; String sourceUrl "(local files)"; String standard_name_vocabulary "CF Standard Name Table v55"; String summary "NOAA and the U.S. Navy are working to better understand underwater sound within the U.S. National Marine Sanctuary System. From 2018 to 2021, these agencies will work with numerous scientific partners to study sound within seven national marine sanctuaries and one marine national monument, which includes waters off Hawai'i and the east and west coasts. Standardized measurements will assess sounds produced by marine animals, physical processes (e.g., wind and waves), and human activities. Collectively, this information will help NOAA and the Navy measure sound levels and baseline acoustic conditions in sanctuaries. This work is a continuation of ongoing Navy and NOAA research, including efforts by NOAA's Office of National Marine Sanctuaries This dataset represents the derived products from the raw acoustic data that are archived at NOAA National Centers for Environmental Information."; String title "NOAA-Navy Sanctuary Soundscape Monitoring Project, North Atlantic Right Whale Sound Production, Gray's Reef, SanctSound_GR01_02_northatlanticrightwhale_1d"; } }
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