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Title Sum-
Institution Dataset ID
     data   graph     files  public Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String ""
attribute NC_GLOBAL awards_0_award_nid String 665130
attribute NC_GLOBAL awards_0_award_number String PLR-0944747
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0944747 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Polar Programs
attribute NC_GLOBAL awards_0_funding_acronym String NSF PLR
attribute NC_GLOBAL awards_0_funding_source_nid String 490497
attribute NC_GLOBAL awards_0_program_manager String Dr Chris H. Fritsen
attribute NC_GLOBAL awards_0_program_manager_nid String 50502
attribute NC_GLOBAL awards_1_award_nid String 665135
attribute NC_GLOBAL awards_1_award_number String PLR-0944511
attribute NC_GLOBAL awards_1_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0944511 (external link)
attribute NC_GLOBAL awards_1_funder_name String NSF Division of Polar Programs
attribute NC_GLOBAL awards_1_funding_acronym String NSF PLR
attribute NC_GLOBAL awards_1_funding_source_nid String 490497
attribute NC_GLOBAL awards_1_program_manager String Dr Chris H. Fritsen
attribute NC_GLOBAL awards_1_program_manager_nid String 50502
attribute NC_GLOBAL awards_2_award_nid String 665138
attribute NC_GLOBAL awards_2_award_number String PLR-0944694
attribute NC_GLOBAL awards_2_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0944694 (external link)
attribute NC_GLOBAL awards_2_funder_name String NSF Division of Polar Programs
attribute NC_GLOBAL awards_2_funding_acronym String NSF PLR
attribute NC_GLOBAL awards_2_funding_source_nid String 490497
attribute NC_GLOBAL awards_2_program_manager String Dr Chris H. Fritsen
attribute NC_GLOBAL awards_2_program_manager_nid String 50502
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Mean acoustic backscatter by site from McMurdo Sound.
PI: Kendra Daly
Co-PI: Stacy Kim
Version: 2018-02-21
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2017-09-25T14:44:26Z
attribute NC_GLOBAL date_modified String 2018-03-19T18:22:41Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.731147
attribute NC_GLOBAL Easternmost_Easting double 166.3348293
attribute NC_GLOBAL geospatial_lat_max double -77.5508
attribute NC_GLOBAL geospatial_lat_min double -77.70318638
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 166.3348293
attribute NC_GLOBAL geospatial_lon_min double 165.0610853
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 231.6565411
attribute NC_GLOBAL geospatial_vertical_min double 7.34392257
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/715512 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String ROV
attribute NC_GLOBAL instruments_0_dataset_instrument_description String SCINI ROV (https://bitbucket.org/scinirov/scini/wiki/Home)
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 727522
attribute NC_GLOBAL instruments_0_description String Remotely operated underwater vehicles (ROVs) are unoccupied, highly maneuverable underwater robots operated by a person aboard a surface vessel. They are linked to the ship by a group of cables that carry electrical signals back and forth between the operator and the vehicle. Most are equipped with at least a video camera and lights. Additional equipment is commonly added to expand the vehicle’s capabilities. These may include a still camera, a manipulator or cutting arm, water samplers, and instruments that measure water clarity, light penetration, and temperature. More information.
attribute NC_GLOBAL instruments_0_instrument_name String Remotely Operated Vehicle
attribute NC_GLOBAL instruments_0_instrument_nid String 445
attribute NC_GLOBAL instruments_0_supplied_name String SCINI ROV
attribute NC_GLOBAL instruments_1_acronym String BioSonics DT-X Echosounder
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Biosonics, Inc. DT-X echosounder with 120 kHz split beam transducer
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 716064
attribute NC_GLOBAL instruments_1_description String The BioSonics DT-X Digital Scientific Echosounder is available in single or spilt beam configuration. The resultant data set comprises 38 and 120 kHz split beam data. The DT-X Digital Scientific Echosounder is used for stock assessment, biomass estimates, and habitat mapping. DT-X digital transducers are available in a range of frequencies (38, 70, 120, 200, and 420 kHz) and beam patterns in split beam or single beam. Up to 5 transducers can be mulltiplexed for simultaneous data collection in any combination of frequencies and transducer orientations. The BioSonics split beam echosounder data can be analyzed for fish quantity, individual sizes, direction of travel through the acoustic beam. Data analysis is done using BioSonics, Echoview, or Sonar4/5-Pro software (and other options are available). Additional information is available from: BioSonics DT-X Digital Echosounder (http://www.biosonicsinc.com/product-overview.asp), BioSonics (http://www.biosonicsinc.com), Echoview (http://www.echoview.com/), and Sonar4/5-Pro (http://tid.uio.no/~hbalk/sonar4_5/index.htm).
attribute NC_GLOBAL instruments_1_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/FFES/ (external link)
attribute NC_GLOBAL instruments_1_instrument_name String BioSonics DT-X Digital Scientific Echosounder
attribute NC_GLOBAL instruments_1_instrument_nid String 646
attribute NC_GLOBAL instruments_1_supplied_name String Biosonics, Inc. DT-X echosounder
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, data, dataset, datetime, depth, depth_mean, dmo, effort, erddap, group, latitude, linear, longitude, management, mean, oceanography, office, preliminary, site, sitenum, sum, sv_linear_sum, sv_mean, sv_mean_effort, time
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/715512/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/715512 (external link)
attribute NC_GLOBAL Northernmost_Northing double -77.5508
attribute NC_GLOBAL param_mapping String {'715512': {'lat': 'flag - latitude', 'depth_mean': 'master - depth', 'lon': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/715512/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of South Florida
attribute NC_GLOBAL people_0_affiliation_acronym String USF
attribute NC_GLOBAL people_0_person_name String Kendra L. Daly
attribute NC_GLOBAL people_0_person_nid String 50505
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String H.T. Harvey & Associates
attribute NC_GLOBAL people_1_person_name String Dr David G. Ainley
attribute NC_GLOBAL people_1_person_nid String 50491
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Point Blue Conservation Science
attribute NC_GLOBAL people_2_person_name String Dr Grant Ballard
attribute NC_GLOBAL people_2_person_nid String 566872
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Moss Landing Marine Laboratories
attribute NC_GLOBAL people_3_affiliation_acronym String MLML
attribute NC_GLOBAL people_3_person_name String Dr Stacy Kim
attribute NC_GLOBAL people_3_person_nid String 51714
attribute NC_GLOBAL people_3_role String Co-Principal Investigator
attribute NC_GLOBAL people_3_role_type String originator
attribute NC_GLOBAL people_4_affiliation String University of South Florida
attribute NC_GLOBAL people_4_affiliation_acronym String USF
attribute NC_GLOBAL people_4_person_name String Benjamin Saenz
attribute NC_GLOBAL people_4_person_nid String 715795
attribute NC_GLOBAL people_4_role String Contact
attribute NC_GLOBAL people_4_role_type String related
attribute NC_GLOBAL people_5_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_5_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_5_person_name String Mathew Biddle
attribute NC_GLOBAL people_5_person_nid String 708682
attribute NC_GLOBAL people_5_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_5_role_type String related
attribute NC_GLOBAL project String McMurdo Predator Prey
attribute NC_GLOBAL projects_0_acronym String McMurdo Predator Prey
attribute NC_GLOBAL projects_0_description String Extracted from the NSF award abstract:
The research project investigates the importance of top down forcing on pelagic food webs. The relatively pristine Ross Sea includes large populations of upper-level predators such as minke and killer whales, Adélie and Emperor penguins, and Antarctic toothfish. This project focuses on food web interactions of Adélie penguins, minke whales, and the fish-eating Ross Sea killer whales, all of which exert foraging pressure on their main prey, crystal krill (Euphausia cyrstallorophias) and silver fish (Pleuragramma antarcticum) in McMurdo Sound.
The investigators used a video- and acoustic-capable ROV, and standard biological and environmental sensors to quantify the abundance and distribution of phytoplankton, sea ice biota, prey, and relevant habitat data.  The sampling area included 37 stations across an 30 x 15 km section of McMurdo Sound, stratified by distance from the ice edge as a proxy for air-breathing predator access. This study will be among the first to assess top-down forcing in the Ross Sea ecosystem and will form the basis for multidisciplinary studies in the future.
Map sampling stations
attribute NC_GLOBAL projects_0_end_date String 2016-11
attribute NC_GLOBAL projects_0_geolocation String McMurdo Sound, Antarctica
attribute NC_GLOBAL projects_0_name String Food web dynamics in an intact ecosystem: the role of top predators in McMurdo Sound
attribute NC_GLOBAL projects_0_project_nid String 665131
attribute NC_GLOBAL projects_0_project_website String https://scini-penguin.mlml.calstate.edu/pauls-wordpress-test-site/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2011-06
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double -77.70318638
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Krill and fish were sampled acoustically and visually beneath the fast ice
using the tethered SCINI ROV, which was deployed and operated through a 25 cm
diameter hole drilled through the sea ice. SCINI contained cameras and
thrusters, and towed a sensor package consisting of a WET Labs fluorometer
(ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Visual
targets were identified to the lowest taxon possible; these observations were
used primarily to verify classification of acoustic signals. The echosounder
operated at a nominal ping rate of 1 ping s-1; however, this rate was
occasionally adjusted if false bottom signals were observed. The general
profile of a dive included a surface transect of ~300 m horizontal distance,
where the acoustic transducer faced downward, and also a dive to ~120 m if
conditions allowed. Echogram data were saved to a depth of 500 m, and
background noise was removed. Given the effective range of the transducer of
approximately 100 m (resolving -80 dB targets), surveys characterized the
upper 200 m of the water column.
attribute NC_GLOBAL title String Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double 165.0610853
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable site   String  
attribute site bcodmo_name String site_descrip
attribute site description String site name string
attribute site long_name String Site
attribute site units String unitless
variable sitenum   float  
attribute sitenum _FillValue float NaN
attribute sitenum actual_range float 9.0, 258.0
attribute sitenum bcodmo_name String site
attribute sitenum description String numerical representation of site
attribute sitenum long_name String Sitenum
attribute sitenum units String unitless
variable datetime   String  
attribute datetime bcodmo_name String date
attribute datetime description String date time of sampling; string with mm/dd/yyy hh:mm:ss
attribute datetime long_name String Datetime
attribute datetime nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute datetime source_name String datetime
attribute datetime time_precision String 1970-01-01T00:00:00Z
attribute datetime units String unitless
variable Group   String  
attribute Group bcodmo_name String sample_descrip
attribute Group description String classification of backscatter;Krill = Crystal krill; Silverfish= Antarctic silverfish; LargeFish = unknown large fish; WeakScatterers = unknown scatterers generally < -70 dB re 1 m-1
attribute Group long_name String Group
attribute Group units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -77.70318638, -77.5508
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String latitude of sampling station (positive is north)
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double 165.0610853, 166.3348293
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String longitude of sampling station (positive is west)
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable dn   double  
attribute dn _FillValue double NaN
attribute dn actual_range double 735560.1655, 735605.0763
attribute dn bcodmo_name String unknown
attribute dn description String python matplotlib datenum; days since 0001-01-01 00:00:00 UTC
attribute dn long_name String DN
attribute dn units String days
variable sv_linear_sum   double  
attribute sv_linear_sum _FillValue double NaN
attribute sv_linear_sum actual_range double 1.31E-7, 0.017623113
attribute sv_linear_sum bcodmo_name String beam_cp
attribute sv_linear_sum description String sum of linear acoustic volume backscatter
attribute sv_linear_sum long_name String Sv Linear Sum
attribute sv_linear_sum nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ATTNZZ01/ (external link)
attribute sv_linear_sum units String m^-1
variable n   int  
attribute n _FillValue int 2147483647
attribute n actual_range int 14, 123498
attribute n bcodmo_name String unknown
attribute n description String number of classified volumes
attribute n long_name String N
attribute n units String unitless
variable effort   int  
attribute effort _FillValue int 2147483647
attribute effort actual_range int 35133, 323949
attribute effort bcodmo_name String unknown
attribute effort description String number of total surveyed volumes
attribute effort long_name String Effort
attribute effort units String unitess
variable sv_mean   double  
attribute sv_mean _FillValue double NaN
attribute sv_mean actual_range double -90.84759626, -56.63791855
attribute sv_mean bcodmo_name String Acc_bksctr
attribute sv_mean description String mean volume backscatter of classified samples
attribute sv_mean long_name String Sv Mean
attribute sv_mean units String decibel at reference level 1 meter (dB re 1 m-1)
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 7.34392257, 231.6565411
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String mean depth of classified volume backscattering
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable sv_mean_effort   double  
attribute sv_mean_effort _FillValue double NaN
attribute sv_mean_effort actual_range double -122.2160813, -70.11085932
attribute sv_mean_effort bcodmo_name String Acc_bksctr
attribute sv_mean_effort description String mean volume backscatter of survey station
attribute sv_mean_effort long_name String Sv Mean Effort
attribute sv_mean_effort units String decibel at reference level 1 meter (dB re 1 m-1)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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