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| griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| log in | [EK80 Antarctic Krill Swarms] - Krill swarms detected with active acoustic EK80 onboard small boat surveys in Palmer Deep Canyon, Antarctica during January-March 2020 (Collaborative Research: Physical Mechanisms Driving Food Web Focusing in Antarctic Biological Hotspots) | These data include identified krill swarms observed by a hull-mounted SIMRAD EK80 single-beam, single frequency (120 kHz) echo sounder (Kongsberg Maritime) hereby referred to as “EK80”. Data were collected in Palmer Deep Canyon, Antarctica during January-March 2020. Small boat surveys were conducted twice weekly over known penguin foraging areas. EK80 data were processed using Echoview software and backscattering zooplankton were identified as krill when within a target strength of -70 dB to -30 dB.\n\nThe EK80 survey was designed in concert with the ACROBAT, HFR and mooring observations to provide a wholistic view of the food web. Observing the distribution of krill swarms and their correlation with other ecosystem variables is important for understanding how the Palmer Deep ecosystem, and other coastal ecosystems globally, respond to complex coastal ocean currents and ways this system may be resilient to rapid warming. The collection and processing of these data was headed by Ashley Hann and Dr. Kim Bernard.\n\ncdm_data_type = Other\nVARIABLES:\nDate_M (unitless)\nTime_M (unitless)\ntime (Iso8601, seconds since 1970-01-01T00:00:00Z)\nlongitude (Lon_m, degrees_east)\nlatitude (Lat_m, degrees_north)\ndepth (Depth_mean, m)\nSv_mean (dB)\nNASC (m²/nmi²)\nHeight_mean (Meters (m))\nThickness_mean (Meters (m))\nLength (Meters (m))\nmld (Meters (m))\nsurface (Binary)\n | BCO-DMO | bcodmo_dataset_949922_v1 | ||||||||||||
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715715 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715715.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_715715/ | public | [McMurdo Sound acoustic backscatter krill and silverfish] - Acoustic backscatter from krill and silverfish in McMurdo Sound from 2014-2015 (Food web dynamics in an intact ecosystem: the role of top predators in McMurdo Sound) | Krill and fish were sampled acoustically and visually beneath the fast ice\nusing the tethered SCINI ROV, which was deployed and operated through a 25 cm\ndiameter hole drilled through the sea ice. SCINI contained cameras and\nthrusters, and towed a sensor package consisting of a WET Labs fluorometer\n(ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Visual\ntargets were identified to the lowest taxon possible; these observations were\nused primarily to verify classification of acoustic signals. The echosounder\noperated at a nominal ping rate of 1 ping s-1; however, this rate was\noccasionally adjusted if false bottom signals were observed. The general\nprofile of a dive included a surface transect of ~300 m horizontal distance,\nwhere the acoustic transducer faced downward, and also a dive to ~120 m if\nconditions allowed. Echogram data were saved to a depth of 500 m, and\nbackground noise was removed. Given the effective range of the transducer of\napproximately 100 m (resolving -80 dB targets), surveys characterized the\nupper 200 m of the water column.\n\ncdm_data_type = Other\nVARIABLES:\ngroup (unitless)\nsitenum (unitless)\nbin_depth (meters (m))\ndepth (m)\nsv_mean (per meter (m-1))\n | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_715715/index.htmlTable | https://www.bco-dmo.org/dataset/715715
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_715715.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_715715&showErrors=false&email= | BCO-DMO | bcodmo_dataset_715715 | |||||
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715512 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715512.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_715512/ | public | [McMurdo Sound acoustic backscatter site] - Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) (Food web dynamics in an intact ecosystem: the role of top predators in McMurdo Sound) | Krill and fish were sampled acoustically and visually beneath the fast ice\nusing the tethered SCINI ROV, which was deployed and operated through a 25 cm\ndiameter hole drilled through the sea ice. SCINI contained cameras and\nthrusters, and towed a sensor package consisting of a WET Labs fluorometer\n(ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Visual\ntargets were identified to the lowest taxon possible; these observations were\nused primarily to verify classification of acoustic signals. The echosounder\noperated at a nominal ping rate of 1 ping s-1; however, this rate was\noccasionally adjusted if false bottom signals were observed. The general\nprofile of a dive included a surface transect of ~300 m horizontal distance,\nwhere the acoustic transducer faced downward, and also a dive to ~120 m if\nconditions allowed. Echogram data were saved to a depth of 500 m, and\nbackground noise was removed. Given the effective range of the transducer of\napproximately 100 m (resolving -80 dB targets), surveys characterized the\nupper 200 m of the water column.\n\ncdm_data_type = Other\nVARIABLES:\nsite (unitless)\nsitenum (unitless)\ndatetime (unitless)\nGroup (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\ndn (days)\nsv_linear_sum (m^-1)\nn (unitless)\neffort (unitess)\nsv_mean (decibel at reference level 1 meter (dB re 1 m-1))\ndepth (m)\nsv_mean_effort (decibel at reference level 1 meter (dB re 1 m-1))\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_715512_fgdc.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_715512/index.htmlTable | https://www.bco-dmo.org/dataset/715512
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_715512.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_715512&showErrors=false&email= | BCO-DMO | bcodmo_dataset_715512 |