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Dataset Title:  Eastern Bering Sea (BASIS) Coastal Research on Juvenile Fish (CTD data) Subscribe RSS
Institution:  Alaska Fisheries Science Center   (Dataset ID: BASIS_CTD)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 time (Haul Date, UTC) ?              
 latitude (GearIn Latitude, degrees_north) ?          50.999    72.502
  < slider >
 longitude (GearIn Longitude, degrees_east) ?          -179.73    171.003
  < slider >
 station_id ?      
   - +  ?
 gear_code ?      
   - +  ?
 event_code ?          "01"    "04"
 depth (m) ?          0.0    1522.0
  < slider >
 pressure (db) ?          -0.106    1522.0
 primary_temperature (degrees_C) ?          -1.7404    1.0E35
 primary_salinity (PSU) ?          0.0035    1.0E35
 primary_conductivity (S/m) ?          -99.76052    124.285653
 chlorophyll_a (g/L) ?          -0.5297    122.095
 sigma_theta (kg/m3) ?          -57.92656667    1.0E35
 large_marine_ecosystem ?      
   - +  ?
 station_number ?          1    778
 year ?          1999    2019
 master_station ?          "51.25-178.5"    "st94"
 tow_type ?          "AFM"    "V"
 gear_description ?          "25"    "CTD917"
 gearIn_time (UTC) ?          "00-Jan-00"    "31-Aug-19"
 bottom_depth (m) ?          3.0    4923.0
 course ?          "0"    "0"
 gear_out_time ?          "00-Jan-00"    "31-Aug-19"
 gear_out_latitude (degrees_north) ?          0.0    66.6001
 gear_out_longitude (degrees_east) ?          -170.0026    171.0058
 vessel (Vessel Code) ?      
   - +  ?
 vessel_name ?      
   - +  ?
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more information)

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(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    String axis "T";
    String description "Date sampling occurred";
    String ioos_category "Time";
    String long_name "Haul Date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 50.999, 72.502;
    String axis "Y";
    String description "Latitude at which gear entered the water";
    String ioos_category "Location";
    String long_name "GearIn Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.73, 171.003;
    String axis "X";
    String description "Longitude at which gear entered the water";
    String ioos_category "Location";
    String long_name "GearIn Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  station_id {
    String description "Concatination of Year (4 digits) + VesselCode (2 digits) + Cruise ID (2 digits) + Station (3 digits)";
    String ioos_category "Other";
    String long_name "Station ID";
  }
  gear_code {
    String description "Type of Gear deployed";
    String ioos_category "Other";
    String long_name "Gear Code";
  }
  event_code {
    String description "Order of gear deployment at each station";
    String ioos_category "Other";
    String long_name "Event Code";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 actual_range 0.0, 1522.0;
    String axis "Z";
    String description "Derived value (Approximate for 2014, binned on pressure)";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  pressure {
    Float64 actual_range -0.106, 1522.0;
    String ioos_category "Other";
    String long_name "Pressure";
    String units "db";
  }
  primary_temperature {
    Float64 actual_range -1.7404, 1.0e+35;
    String description "ITS-90, Dyson SBE 3- 4379; ITS-90, deg C, Epic SBE 3-4354";
    String ioos_category "Other";
    String long_name "Primary Temperature";
    String units "degrees_C";
  }
  primary_salinity {
    Float64 actual_range 0.0035, 1.0e+35;
    String description "Derived value";
    String ioos_category "Other";
    String long_name "Primary Salinity";
    String units "PSU";
  }
  primary_conductivity {
    Float64 actual_range -99.76052, 124.285653;
    String description "primary sensor, corrected using cell thermal mass module in Seabird processing";
    String ioos_category "Other";
    String long_name "Primary Conductivity";
    String units "S/m";
  }
  chlorophyll_a {
    Float64 actual_range -0.5297, 122.095;
    String description "Equation for each year found in CTD Design view table. (Not Calibrated yet for 2014 data)";
    String ioos_category "Other";
    String long_name "Chlorophyll A";
    String units "g/L";
  }
  sigma_theta {
    Float64 actual_range -57.92656667, 1.0e+35;
    String description "Derived value";
    String ioos_category "Other";
    String long_name "Sigma Theta";
    String units "kg/m3";
  }
  large_marine_ecosystem {
    String description "Large Marine Ecosystem where sampling occurred";
    String ioos_category "Other";
    String long_name "Large Marine Ecosystem";
  }
  station_number {
    Int32 actual_range 1, 778;
    String description "Number indicating order in which stations were sampled";
    String ioos_category "Other";
    String long_name "Station Number";
  }
  year {
    Int32 actual_range 1999, 2019;
    String description "Year in which sampling occurred";
    String ioos_category "Other";
    String long_name "Year";
  }
  master_station {
    String description "Unique name of station location.  Either specific name assigned or latitude-longitude rounded to nearest 0.25 degrees";
    String ioos_category "Other";
    String long_name "Master Station";
  }
  tow_type {
    String description "Code for type of tow done in survey";
    String ioos_category "Other";
    String long_name "Tow Type";
  }
  gear_description {
    String description "Description of sampling gear used (oceanography/zooplankton only)";
    String ioos_category "Other";
    String long_name "Gear Description";
  }
  gearIn_time {
    String description "Time at which gear entered the water";
    String ioos_category "Other";
    String long_name "GearIn Time";
    String units "UTC";
  }
  bottom_depth {
    Float32 actual_range 3.0, 4923.0;
    String description "Depth of bottom at beginning of sampling.  Used as BottomDepth field in situations where only one depth is provided";
    String ioos_category "Other";
    String long_name "Bottom Depth";
    String units "m";
  }
  course {
    String ioos_category "Other";
    String long_name "Course";
  }
  gear_out_time {
    String ioos_category "Other";
    String long_name "Gear Out Time";
  }
  gear_out_latitude {
    Float32 actual_range 0.0, 66.6001;
    String ioos_category "Other";
    String long_name "Gear Out Latitude";
    String units "degrees_north";
  }
  gear_out_longitude {
    Float32 actual_range -170.0026, 171.0058;
    String ioos_category "Other";
    String long_name "Gear Out Longitude";
    String units "degrees_east";
  }
  vessel {
    String ioos_category "Other";
    String long_name "Vessel Code";
  }
  vessel_name {
    String ioos_category "Other";
    String long_name "Vessel Name";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String defaultGraphQuery "longitude,latitude,time&longitude>=-180&longitude<=-130&.draw=markers&.marker=5|5";
    Float64 Easternmost_Easting 171.003;
    Float64 geospatial_lat_max 72.502;
    Float64 geospatial_lat_min 50.999;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 171.003;
    Float64 geospatial_lon_min -179.73;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 1522.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-07-13T14:45:23Z (local files)
2024-07-13T14:45:23Z https://erddap.psmfc.org/erddap/tabledap/BASIS_CTD.html";
    String infoUrl "https://www.fisheries.noaa.gov/alaska/population-assessments/bering-arctic-and-subarctic-integrated-survey";
    String institution "Alaska Fisheries Science Center";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, 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.";
    Float64 Northernmost_Northing 72.502;
    String publisher_email "jeanette.gann@noaa.gov";
    String publisher_name "Jeanette Gann";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 50.999;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "station_id,gear_code,large_marine_ecosystem,vessel,vessel_name";
    String summary "Pacific salmon (Oncorhynchus spp.) runs in rivers that flow into the eastern Bering Sea have been inconsistent and at times very weak. Low returns of chinook (O. tshawytscha) and chum (O. keta) salmon to the Yukon River, Kuskokwim River, and Norton Sound areas of Alaska prompted the state of Alaska to restrict commercial and subsistence fisheries during 2000 and declare the region a fisheries disaster area. Weak salmon returns to these river systems follow several years of low sockeye (O. nerka) salmon returns to Bristol Bay, which was declared a fisheries disaster region during 1998 by both the State of Alaska and the U.S. Department of Commerce. Causes of the poor salmon returns to these river systems are not known however, the regional-scale decline of these stocks indicates that the marine environment may play a critical role. Ocean conditions, particularly in the first few months after the salmon leave fresh water, are known to significantly affect salmon survival (Holtby et al. 1990; Friedland et al. 1996; Beamish and Mahnken 2001). Mechanisms affecting marine survival of the eastern Bering Sea salmon stocks are unknown, principally due to the lack of marine life history information on western Alaska salmon. To improve understanding of the marine life-history stage of salmon in the Bering Sea, the North Pacific Anadromous Fish Commission (NPAFC) began an internationally coordinated research program on salmon in the Bering Sea called the Bering-Aleutian Salmon International Survey (BASIS) (NPAFC 2001). As part of BASIS, scientists from the National Marine Fisheries Service (NMFS), Ocean Carrying Capacity (OCC) program conducted a fall survey on the eastern Bering Sea shelf to provide key ecological data for eastern Bering Sea salmon stocks during their juvenile life-history stage. The goal of the OCC/BASIS salmon research cruise was to understand mechanisms underlying the effects of environment on distribution, migration, and growth of juvenile salmon on the eastern Bering Sea shelf. Primary objectives of BASIS include: 1) to determine the extent of offshore migrations of juvenile salmon from rivers draining into the eastern Bering Sea, 2) to describe the physical environment of the eastern and northeastern Bering Sea shelf occupied by juvenile salmon, and 3) to collect biological information on other ecologically important species. Summaries of previous Bering Sea juvenile salmon research cruises can be found in Farley et al. (1999, 2000, 2001, 2002, 2004, 2005).";
    String title "Eastern Bering Sea (BASIS) Coastal Research on Juvenile Fish (CTD data)";
    Float64 Westernmost_Easting -179.73;
  }
}

 

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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