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Dataset Title:  Zooplankton abundance from Isaacs-Kid Midwater Trawl (IKMT) hauls from RVIB
Nathaniel B. Palmer NBP1801 in the Ross Sea, Jan.-Feb. 2018
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_792385)
Range: longitude = 164.1588 to 172.9985°E, latitude = -76.7504 to -74.7903°N, depth = 57.0 to 290.0m, time = 2018-01-10T01:14:00Z to 2018-02-16T00:49:00Z
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Method {
    String bcodmo_name "instrument";
    String description "Collection method specified; either a 1-m diameter ring net with 333um mesh or an Isaacs Kidd Midwater Trawl with a 1.8-m frame";
    String long_name "Method";
    String units "unitless";
  }
  Tow_Trawl_number {
    Byte _FillValue 127;
    Byte actual_range 1, 10;
    String bcodmo_name "tow";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Tow/Trawl number provided in chronological order during the cruise";
    String long_name "Tow Trawl Number";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.51554684e+9, 1.51874214e+9;
    String axis "T";
    String bcodmo_name "time_start";
    String description "UTC date and time the tow/trawl started; ISO formatted";
    String ioos_category "Time";
    String long_name "ISO Date Time UTC Start";
    String source_name "ISO_DateTime_UTC_start";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  ISO_DateTime_UTC_end {
    String bcodmo_name "time_end";
    String description "UTC date and time the tow/trawl ended; ISO formatted: YYYY-MM-DDTHH:MM:SSZ";
    String long_name "ISO Date Time UTC End";
    String time_precision "1970-01-01T00:00:00Z";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range -76.7504, -74.7903;
    String axis "Y";
    String bcodmo_name "lat_start";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude/Location where the tow/trawl started";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String source_name "lat_start_decdeg";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range 164.1588, 172.9985;
    String axis "X";
    String bcodmo_name "lon_start";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude/Location where the tow/trawl started";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String source_name "lon_start_decdeg";
    String standard_name "longitude";
    String units "degrees_east";
  }
  lat_end_decdeg {
    Float32 _FillValue NaN;
    Float32 actual_range -76.7415, -74.7731;
    String bcodmo_name "lat_end";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude/Location where the tow/trawl ended";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "decimal degrees";
  }
  lon_end_decdeg {
    Float32 _FillValue NaN;
    Float32 actual_range 164.1284, 172.9355;
    String bcodmo_name "lon_end";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude/Location where the tow/trawl ended";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "decimal degrees";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 57.0, 290.0;
    String axis "Z";
    String bcodmo_name "depth";
    String description "Water depth the ring net or trawl were towed";
    String ioos_category "Location";
    String long_name "Net Depth M";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  Bottom_depth_m {
    Int16 _FillValue 32767;
    Int16 actual_range 588, 1175;
    String bcodmo_name "depth_w";
    String description "Water depth at location of tow/trawl";
    String long_name "Bottom Depth M";
    String units "meters";
  }
  SST_deg_C {
    Float32 _FillValue NaN;
    Float32 actual_range -2.6, 1.5;
    String bcodmo_name "temp_ss";
    String description "Sea Surface Temperature at time and location of tow/trawl";
    String long_name "SST Deg C";
    String units "Degrees Celsius";
  }
  Flowmeter_start {
    Int32 _FillValue 2147483647;
    Int32 actual_range 104149, 974660;
    String bcodmo_name "flow";
    String description "Calibrated General Oceanics flowmeter reading at start of tow/trawl; used in calculations for water volume that passed through the net/trawl";
    String long_name "Flowmeter Start";
    String units "unitless";
  }
  Flowmeter_end {
    Int32 _FillValue 2147483647;
    Int32 actual_range 147685, 1071601;
    String bcodmo_name "flow";
    String description "Calibrated General Oceanics flowmeter reading at end of tow/trawl; used in calculations for water volume that passed through the net/trawl";
    String long_name "Flowmeter End";
    String units "unitless";
  }
  Volume_m3 {
    Int16 _FillValue 32767;
    Int16 actual_range 2948, 30702;
    String bcodmo_name "vol_filt";
    String description "Volume of water that passed through the net/trawl; calculated using flowmeter data and area of net opening";
    String long_name "Volume M3";
    String units "cubic meters";
  }
  Euphausiids_Euphausia_crystallorophias {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 4.4834;
    String bcodmo_name "abundance";
    String description "Abundance of Euphausia crystallorophias";
    String long_name "Euphausiids Euphausia Crystallorophias";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Ecrystallorophias_small_juveniles {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.4601;
    String bcodmo_name "abundance";
    String description "Abundance of E crystallorophias small juveniles";
    String long_name "Ecrystallorophias Small Juveniles";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Euphausia_superba {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 2.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of Euphausia superba";
    String long_name "Euphausia Superba";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Thysanoessa_macrura {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0038;
    String bcodmo_name "abundance";
    String description "Abundance of Thysanoessa macrura";
    String long_name "Thysanoessa Macrura";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Amphipods_Vibilia_stebbingi {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0681;
    String bcodmo_name "abundance";
    String description "Abundance of  Vibilia stebbingi";
    String long_name "Amphipods Vibilia Stebbingi";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Primno_macropa {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 7.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of Primno macropa";
    String long_name "Primno Macropa";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Themisto_gaudichaudii {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0014, 0.0158;
    String bcodmo_name "abundance";
    String description "Abundance of Themisto gaudichaudii";
    String long_name "Themisto Gaudichaudii";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Hyperoche_sp {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0098, 0.2613;
    String bcodmo_name "abundance";
    String description "Abundance of Hyperoche sp.";
    String long_name "Hyperoche Sp";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Eusirus_sp {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 3.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of Eusirus sp.";
    String long_name "Eusirus Sp";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Chaetognaths_Pseudosagitta {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.001;
    String bcodmo_name "abundance";
    String description "Abundance of Pseudosagitta";
    String long_name "Chaetognaths Pseudosagitta";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Pteropods_Limacina_rangii {
    Float32 _FillValue NaN;
    Float32 actual_range 0.052, 4.1091;
    String bcodmo_name "abundance";
    String description "Abundance of Limacina rangii";
    String long_name "Pteropods Limacina Rangii";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Clione_limacina_antarctica {
    Float32 _FillValue NaN;
    Float32 actual_range 7.0e-4, 0.1095;
    String bcodmo_name "abundance";
    String description "Abundance of Clione limacina antarctica";
    String long_name "Clione Limacina Antarctica";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Spongiobranchaea_australis {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 3.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of Spongiobranchaea australis";
    String long_name "Spongiobranchaea Australis";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Fish_Pleuragramma_antarctica_adult_juv {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0055;
    String bcodmo_name "abundance";
    String description "Abundance of Pleuragramma antarctica adults and juveniles";
    String long_name "Fish Pleuragramma Antarctica Adult Juv";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Pleuragramma_antarctica_larvae {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 21.3535;
    String bcodmo_name "abundance";
    String description "Abundance of Pleuragramma antarctica larvae";
    String long_name "Pleuragramma Antarctica Larvae";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Channichthyidae {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0126;
    String bcodmo_name "abundance";
    String description "Abundance of Channichthyidae";
    String long_name "Channichthyidae";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Decapods_Notocrangon_antarcticus {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.0099;
    String bcodmo_name "abundance";
    String description "Abundance of Notocrangon antarcticus";
    String long_name "Decapods Notocrangon Antarcticus";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Other_Polychaeta {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 7.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of other Polychaeta";
    String long_name "Other Polychaeta";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Ctenaphora {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 0.001;
    String bcodmo_name "abundance";
    String description "Abundance of Ctenaphora";
    String long_name "Ctenaphora";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
  Medusae {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 5.0e-4;
    String bcodmo_name "abundance";
    String description "Abundance of Medusae";
    String long_name "Medusae";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "number/meter^3";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"Sample collection: Net tows and mid-water trawls were conducted in the western
Ross Sea, Antarctica on board the R/V Nathaniel B. Palmer in January-February
2018 (cruise number 18-01). Both the ring net (1 m diameter, 333 um mesh, non-
filtering cod end) and the Issacs-Kidd Midwater Trawl (IKMT, 1.8 m frame, 500
um mesh, non-filtering cod end) were fitted with a calibrated General Oceanics
flow meter. Contents of each tow were concentrated and preserved with buffered
formaldehyde (4% final concentration) in 500 ml wide-mouth glass jars. Samples
were sent back to the home laboratory (Rutgers University) for analysis.
 
Analyses: Contents of each tow (or a subsample if the density of zooplankton
or fish was high) were sorted by taxa and, in some cases, developmental stage.
Measurements for abundance were conducted using a dissecting microscope (Zeiss
Discovery.V8).
 
Volume of water (cubic meter) that passed through the net/trawl during each
tow was calculated using flowmeter rotor constant, flowmeter start and end
values, and the area of net opening.
 
Abundance per cubic meter per tow/trawl was then calculated for each species
and, in some cases, developmental stage, by dividing the number of individuals
for each species/developmental stage by the volume of water.";
    String awards_0_award_nid "788722";
    String awards_0_award_number "OPP-1743035";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1743035";
    String awards_0_funder_name "NSF Office of Polar Programs (formerly NSF PLR)";
    String awards_0_funding_acronym "NSF OPP";
    String awards_0_funding_source_nid "713360";
    String awards_0_program_manager "Jennifer Burns";
    String awards_0_program_manager_nid "50508";
    String cdm_data_type "Other";
    String comment 
"2018 Ross Sea Zooplankton Abundance from IKMT trawls 
   from the Ross Sea, Antarctica, R/V Nathaniel B. Palmer cruise NBP18-01, Jan-Feb. 2018 
   PI: G. Saba (Rutgers U) 
   version 3 
   version date: 2020-04-29 - removed extra zeroes after seconds in ISO-times;  
     replaces v2.2020-04-27 - no change from v1 
     replaces v1.2020-02-06";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2020-02-10T14:30:12Z";
    String date_modified "2020-04-29T17:09:05Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.26008/1912/bco-dmo.792385.3";
    Float64 Easternmost_Easting 172.9985;
    Float64 geospatial_lat_max -74.7903;
    Float64 geospatial_lat_min -76.7504;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 172.9985;
    Float64 geospatial_lon_min 164.1588;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 290.0;
    Float64 geospatial_vertical_min 57.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2020-12-03T04:25:21Z (local files)
2020-12-03T04:25:21Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_792385.das";
    String infoUrl "https://www.bco-dmo.org/dataset/792385";
    String institution "BCO-DMO";
    String instruments_0_acronym "Ring Net";
    String instruments_0_dataset_instrument_description "Plankton net with 1 m diameter, 333 um mesh, non-filtering cod end. Used to collected zooplankton during the Ross Sea cruise.";
    String instruments_0_dataset_instrument_nid "792391";
    String instruments_0_description "A Ring Net is a generic plankton net, made by attaching a net of any mesh size to a metal ring of any diameter.  There are 1 meter, .75 meter, .25 meter and .5 meter nets that are used regularly. The most common zooplankton ring net is 1 meter in diameter and of mesh size .333mm, also known as a 'meter net' (see Meter Net).";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/22/";
    String instruments_0_instrument_name "Ring Net";
    String instruments_0_instrument_nid "444";
    String instruments_0_supplied_name "ring net";
    String instruments_1_dataset_instrument_description "Optical microscope with magnification for observation of the Ross Sea cruise tow/trawl samples. Used to taxonomically identify and count collected zooplankton during the Ross Sea cruise.";
    String instruments_1_dataset_instrument_nid "792393";
    String instruments_1_description "Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a \"light microscope\".";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB05/";
    String instruments_1_instrument_name "Microscope-Optical";
    String instruments_1_instrument_nid "708";
    String instruments_1_supplied_name "Zeiss Discovery V8 Dissecting microscope";
    String instruments_2_acronym "IKMT";
    String instruments_2_dataset_instrument_description "Rectangle framed net (1.75 m x 1.44 m) with 500 um mesh and a non-filtering cod end. Used to collected zooplankton during the Ross Sea cruise.";
    String instruments_2_dataset_instrument_nid "792392";
    String instruments_2_description 
"A trawl with a pentagonal mouth opening and a dihedral depressor vane as part of the mouth opening. IKMTs come in various dimensions (refer to individual dataset documentation).

The original IKMTs were 10 foot (304 cm) and 15 foot (457 cm) at the mouth. The 10 foot IKMT net was 31 feet (9.45 m) in length (Wiebe and Benfield 2003).";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/NETT0071/";
    String instruments_2_instrument_name "Isaacs-Kidd Midwater Trawl";
    String instruments_2_instrument_nid "715";
    String instruments_2_supplied_name "Isaacs-Kid Midwater Trawl";
    String keywords "adult, amphipods, Amphipods_Vibilia_stebbingi, antarctica, antarcticus, australis, bco, bco-dmo, biological, bottom, Bottom_depth_m, chaetognaths, Chaetognaths_Pseudosagitta, channichthyidae, chemical, clione, Clione_limacina_antarctica, crystallorophias, ctenaphora, data, dataset, date, decapods, Decapods_Notocrangon_antarcticus, depth, dmo, ecrystallorophias, Ecrystallorophias_small_juveniles, end, erddap, euphausia, Euphausia_superba, euphausiids, Euphausiids_Euphausia_crystallorophias, eusirus, Eusirus_sp, fish, Fish_Pleuragramma_antarctica_adult_juv, flowmeter, Flowmeter_end, Flowmeter_start, gaudichaudii, hyperoche, Hyperoche_sp, iso, ISO_DateTime_UTC_end, juv, juveniles, larvae, lat_end_decdeg, latitude, limacina, lon_end_decdeg, longitude, macropa, macrura, management, medusae, method, net, Net_depth_m, notocrangon, number, oceanography, office, Other_Polychaeta, pleuragramma, Pleuragramma_antarctica_larvae, polychaeta, preliminary, primno, Primno_macropa, pseudosagitta, pteropods, Pteropods_Limacina_rangii, rangii, sea, small, spongiobranchaea, Spongiobranchaea_australis, sst, SST_deg_C, start, stebbingi, superba, surface, temperature, themisto, Themisto_gaudichaudii, thysanoessa, Thysanoessa_macrura, time, tow, Tow_Trawl_number, trawl, vibilia, volume, Volume_m3";
    String license "https://www.bco-dmo.org/dataset/792385/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/792385";
    Float64 Northernmost_Northing -74.7903;
    String param_mapping "{'792385': {'lon_start_decdeg': 'flag - longitude', 'Net_depth_m': 'flag - depth', 'ISO_DateTime_UTC_start': 'flag - time', 'lat_start_decdeg': 'flag - latitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/792385/parameters";
    String people_0_affiliation "Rutgers University";
    String people_0_person_name "Grace Saba";
    String people_0_person_nid "721369";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Nancy Copley";
    String people_1_person_nid "50396";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "bio-acoustic plankton surveys";
    String projects_0_acronym "bio-acoustic plankton surveys";
    String projects_0_description 
"NSF Award Abstract:
The Ross Sea is the one of the most productive regions in Antarctica and supports large populations of several key species in the Ross Sea food web, including copepods, crystal krill (Euphausia crystallorophias), and Antarctic silverfish (Pleuragramma antarcticum). Copepods and crystal krill dominate the diets of Antarctic silverfish, the dominant fish species in the high Antarctic zone, and silverfish are a major link between lower (copepods, krill) and higher (fishes, marine mammals, flighted birds, Adélie and Emperor penguins) trophic levels. Despite the significance of these key species, there is limited understanding of copepod, krill, and silverfish mesoscale distribution, spatial structure of age/maturity classes, and their interactions with physical drivers within the Ross Sea. Autonomous underwater profiling gliders are a developing technology that offers the potential for providing high spatial, temporal, and depth resolution data on regional scales. The project will test the capability of a multi-frequency echo sounder integrated into a Slocum Webb glider with the aim of providing the first glider-based acoustic assessment of simultaneous distributions of three trophic levels in the Ross Sea. Complementary glider sensors measuring physical, chemical, and biological parameters will provide mesoscale and sub-mesoscale hydrographic information from which phytoplankton-zooplankton-fish interactions and the relationships between these organisms and physics drivers (sea ice, circulation features) will be investigated. The approach proposed here, glider acoustics, is relatively new and has the potential to be transformational for investigating food webs and the Ross Sea ecosystem.
Researchers will modify and integrate an Acoustic Zooplankton and Fish Profiler (AZFP) multi-frequency echo sounder into a Slocum Webb G2 glider with the capability to differentiate between krill and other types of zooplankton, including copepods, and different sizes of krill and silverfish. The AZFP will be complemented with the existing glider sensors including a CTD, a WET Labs BB2FL ECO puck configured for simultaneous chlorophyll fluorescence (phytoplankton biomass) and optical backscatter measurements, and an Aanderaa Optode for measuring dissolved oxygen. The new sensor suite will be tested during a four-week glider deployment, where it will conduct acoustic surveys to map distribution and abundance of multiple zooplankton taxa and silverfish during the austral summer along the Terra Nova Bay polynya ice shelf and in adjacent continental shelf waters. The relationships between phytoplankton-zooplankton-fish distributions and the physical drivers of zooplankton and silverfish species and size distributions will be investigated. Coordinated ship-based acoustic sampling and net tows/trawls will be conducted multiple times during the glider deployment to validate glider acoustic-based species, size, and abundance measurements. Open accessible, automated data produced during this project will be made available through RUCOOL (Rutgers University Center for Ocean Observing Leadership) and THREDDS (Thematic Real-time Environmental Data Distribution System). The production of consistent, vertically-resolved, high resolution glider-based acoustic measurements will define a successful outcome of this project that should help in identifying the challenges in their use as a potentially cost-effective, automated examination of food webs in the Antarctic.";
    String projects_0_end_date "2019-07";
    String projects_0_geolocation "Terra Nova Bay, Western Ross Sea, Antarctica";
    String projects_0_name "Using Bio-acoustics on an Autonomous Surveying Platform for the Examination of Phytoplankton-zooplankton and Fish Interactions in the Western Ross Sea";
    String projects_0_project_nid "788723";
    String projects_0_start_date "2017-08";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -76.7504;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "Method";
    String summary "Isaacs-Kid Midwater Trawl (IKMT) hauls were conducted during the R/V Nathaniel B. Palmer cruise NBP18-01 in Jan-Feb 2018. These data represent the zooplankton species and abundance analysis resulting from these sample collections. A companion dataset of ring net tow abundances is also available.";
    String time_coverage_end "2018-02-16T00:49:00Z";
    String time_coverage_start "2018-01-10T01:14:00Z";
    String title "Zooplankton abundance from Isaacs-Kid Midwater Trawl (IKMT) hauls from RVIB Nathaniel B. Palmer NBP1801 in the Ross Sea, Jan.-Feb. 2018";
    String version "3";
    Float64 Westernmost_Easting 164.1588;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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