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   set  data   graph     California Underwater Glider Network (CUGN) - CUGN Line 56 - California Underwater Glider
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sccoos-cugn-binnedCUGN56

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _NCProperties String version=2,netcdf=4.7.4,hdf5=1.10.6
attribute NC_GLOBAL acknowledgement String Funded by National Oceanic and Atmospheric Administration (NOAA): Global Ocean Monitoring and Observing (GOMO) Program and Integrated Ocean Observing System. Supported by Instrument Development Group - Scripps Institution of Oceanography
attribute NC_GLOBAL cdm_data_type String Trajectory
attribute NC_GLOBAL cdm_trajectory_variables String mission,trajectory
attribute NC_GLOBAL contributor_name String Daniel Rudnick, Jennifer Sevadjian
attribute NC_GLOBAL contributor_role String principalInvestigator, resourceProvider
attribute NC_GLOBAL contributor_role_vocabulary String https://vocab.nerc.ac.uk/collection/G04/current (external link)
attribute NC_GLOBAL Conventions String CF-1.8, ACDD-1.3, Spray-0.1, COARDS
attribute NC_GLOBAL creator_email String idgdata at ucsd.edu
attribute NC_GLOBAL creator_institution String Scripps Institution of Oceanography
attribute NC_GLOBAL creator_institution_id String https://ror.org/04v7hvq31 (external link)
attribute NC_GLOBAL creator_name String Instrument Development Group
attribute NC_GLOBAL creator_type String group
attribute NC_GLOBAL creator_url String https://spraydata.ucsd.edu (external link)
attribute NC_GLOBAL date_created String 2026-03-09T00:48:35Z
attribute NC_GLOBAL date_issued String 2026-03-09T00:48:35Z
attribute NC_GLOBAL date_modified String 2026-03-09T00:00:51Z
attribute NC_GLOBAL doi String 10.21238/S8SPRAY1618
attribute NC_GLOBAL Easternmost_Easting double -121.996485
attribute NC_GLOBAL featureType String Trajectory
attribute NC_GLOBAL geospatial_bbox String POLYGON ((-121.996485 36.75746, -121.996485 38.59224104684388, -126.8960425 38.59224104684388, -126.8960425 36.75746, -121.996485 36.75746))
attribute NC_GLOBAL geospatial_bounds String POLYGON ((-122.0493075 36.75746, -126.872315 37.04943249999999, -126.89188 37.1110475, -126.8955825 37.1411575, -126.8960425 37.1747225, -126.8941975 37.2076875, -126.888555 37.24455, -126.880925 37.2814525, -126.673795 38.0779975, -126.5989225 38.2942725, -126.5913525 38.2988775, -123.6691515745952 38.59191284894796, -123.6622997237856 38.59224104684388, -123.646253604668 38.5914489866628, -123.637779675832 38.5906465132914, -123.6260340274959 38.58936453987419, -123.4679061954357 38.56992411165569, -123.4665085863072 38.56947733496707, -123.3591884363664 38.51864406401149, -123.338855 38.5061275, -123.3286059628262 38.49918959220467, -121.996485 36.7712675, -122.0002725 36.768725, -122.0093175 36.7645175, -122.01982 36.76161, -122.030445 36.75919500000001, -122.0493075 36.75746))
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:4326
attribute NC_GLOBAL geospatial_bounds_vertical_crs String EPSG:5831
attribute NC_GLOBAL geospatial_lat_max double 38.59224104684388
attribute NC_GLOBAL geospatial_lat_min double 36.75746
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -121.996485
attribute NC_GLOBAL geospatial_lon_min double -126.8960425
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max String 500.0
attribute NC_GLOBAL geospatial_vertical_min String 10.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL history String 2026-03-09T00:00:29Z (local files) 2026-03-09T00:00:29Z https://spraydata.ucsd.edu/erddap/tabledap/binnedCUGN56.nc?&time%3E=2023-05-25 (external link)
attribute NC_GLOBAL id String binnedCUGN56
attribute NC_GLOBAL infoUrl String https://portal.axds.co/?portal_id=152#platform/7e897c67-5ca9-568f-8a9d-ff858848cbcd/v2 (external link)
attribute NC_GLOBAL institution String University of California - San Diego; Scripps
attribute NC_GLOBAL institution_id String https://ror.org/04v7hvq31 (external link)
attribute NC_GLOBAL keywords String backscatter, calcofi, california, chemistry, chlorophyll, chlorophyll-a, chlorophyll_a, circulation, color, concentration, cooperative, currents, data, density, depth, depth-averaged, diego, dissolved, dissolved o2, doxy, each, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Oxygen, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Salinity, eastward, eastward_sea_water_velocity, fisheries, fluorescence, glider, identifier, institution, investigations, lat_uv, latitude, line, lon_uv, longitude, mass, mass_concentration_of_chlorophyll_a_in_sea_water, mission, mission_profile, moles, moles_of_oxygen_per_unit_mass_in_sea_water, name, network, northward, northward_sea_water_velocity, O2, ocean, ocean color, oceanic, oceanography, oceans, one, oxygen, part, per, practical, pressure, profile, salinity, san, science, scripps, sea, sea_water_practical_salinity, sea_water_temperature, seawater, temperature, time, time_uv, trajectory, trajectory_index, u, u_depth_mean, underwater, underwater glider, university, velocity, water
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String 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.
attribute NC_GLOBAL metadata_link String https://spraydata.ucsd.edu (external link)
attribute NC_GLOBAL naming_authority String edu.ucsd.idg
attribute NC_GLOBAL network String OceanGliders > BOON > Northeast Pacific Ocean > California Underwater Glider Network, California Underwater Glider Network (CUGN), IOOS
attribute NC_GLOBAL Northernmost_Northing double 38.59224104684388
attribute NC_GLOBAL packrat_source String sccoos.cugn.cugn
attribute NC_GLOBAL packrat_source_id String binnedCUGN56
attribute NC_GLOBAL packrat_uuid String 7e897c67-5ca9-568f-8a9d-ff858848cbcd
attribute NC_GLOBAL platform_category String glider
attribute NC_GLOBAL platform_institution String Scripps Institution of Oceanography
attribute NC_GLOBAL platform_type String glider
attribute NC_GLOBAL processing_level String Level 3 - This is postprocessed, delayed mode data that has been quality controlled by IDG personnel. Outliers have been removed and data are binned at 10m vertical resolution for ease of use. This dataset contains data from multiple glider deployments over time at the location identified by the project and site metadata attributes. Contact the creator_email for more details.
attribute NC_GLOBAL project String California Underwater Glider Network (CUGN)
attribute NC_GLOBAL publisher_email String idgdata at ucsd.edu
attribute NC_GLOBAL publisher_institution String University of California - San Diego; Scripps Institution of Oceanography
attribute NC_GLOBAL publisher_institution_id String https://ror.org/04v7hvq31 (external link)
attribute NC_GLOBAL publisher_name String Instrument Development Group
attribute NC_GLOBAL publisher_type String group
attribute NC_GLOBAL publisher_url String https://spraydata.ucsd.edu (external link)
attribute NC_GLOBAL references String Rudnick, D. L. (2016). Ocean research enabled by underwater gliders. Annual review of marine science, 8, 519-541, doi:10.1146/annurev-marine-122414-033913

Rudnick, D. L., Davis, R. E., & Sherman, J. T. (2016). Spray Underwater Glider Operations. Journal of Atmospheric and Oceanic Technology, 33(6), 1113-1122, doi:10.1175/JTECH-D-15-0252.1

Rudnick, D. L., Davis, R. E., Eriksen, C. C., Fratantoni, D. M., & Perry, M. J. (2004). Underwater gliders for ocean research. Marine Technology Society Journal, 38(2), 73-84, doi:10.4031/002533204787522703

Sherman, J., Davis, R. E., Owens, W. B., & Valdes, J. (2001). The autonomous underwater glider 'Spray'. IEEE Journal of oceanic Engineering, 26(4), 437-446, doi:10.1109/48.972076
attribute NC_GLOBAL sea_name String Coastal Waters of California
attribute NC_GLOBAL site String CUGN Line 56
attribute NC_GLOBAL source String Observational data from a profiling underwater glider.
attribute NC_GLOBAL sourceUrl String https://files.platforms.axds.co/sccoos/cugn/binnedCUGN56/binnedCUGN56_processed.nc (external link)
attribute NC_GLOBAL Southernmost_Northing double 36.75746
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v75
attribute NC_GLOBAL subsetVariables String mission
attribute NC_GLOBAL summary String California Underwater Glider Network - Line 56. The overarching goal of the California Underwater Glider Network is to sustain baseline observations of climate variability off the coast of California. The technical approach is to deploy autonomous underwater gliders in a network to provide real-time data.
The CUGN uses Spray underwater gliders making repeated dives from the surface to 500 m and back, repeating the cycle every 3 hours, and traveling 3 km in the horizontal during that time. The CUGN includes gliders on three of the traditional cross-shore California Cooperative Oceanic Fisheries Investigations (CalCOFI) lines: line 66.7 off Monterey Bay, line 80 off Point Conception, and line 90 off Dana Point.
The glider missions typically last about 100 days, and cover over 2000 km, thus providing 4-6 sections on lines extending 300-500 km offshore. Since 2005 the CUGN has covered 200,000 km over ground in 28 glider-years, while doing 90,000 dives.
attribute NC_GLOBAL time_coverage_duration String P942DT19H16M9S
attribute NC_GLOBAL time_coverage_end String 2025-12-22T19:45:17Z
attribute NC_GLOBAL time_coverage_resolution String P0DT0H2M49S
attribute NC_GLOBAL time_coverage_start String 2023-05-25T00:29:08Z
attribute NC_GLOBAL title String California Underwater Glider Network (CUGN) - CUGN Line 56 - California Underwater Glider Network - Line 56, Science Quality Binned Data
attribute NC_GLOBAL Westernmost_Easting double -126.8960425
variable acoustic_backscatter   double  
attribute acoustic_backscatter _ChunkSizes uint 10, 70000
attribute acoustic_backscatter _FillValue double -9999.9
attribute acoustic_backscatter actual_range double 48.848363859329034, 93.00237712881902
attribute acoustic_backscatter comment String Uncalibrated acoustic backscatter from acoustic doppler profilers. Prior to 2013, Spray deployments used a 750kHz Sontek ADP, in 2013 Spray gliders transitioned to using 1MHz Nortek AD2CP. Use the acoustic_backscatter_flag variable to see which sensor was used for a given deployment.
attribute acoustic_backscatter coordinates String time z longitude latitude
attribute acoustic_backscatter ioos_category String Unknown
attribute acoustic_backscatter long_name String Acoustic Backscatter
attribute acoustic_backscatter non_null_count String 319807
attribute acoustic_backscatter units String dB
variable acoustic_backscatter_flag   double  
attribute acoustic_backscatter_flag _ChunkSizes uint 10, 70000
attribute acoustic_backscatter_flag _FillValue double -9999.9
attribute acoustic_backscatter_flag actual_range double 1.0, 1.0
attribute acoustic_backscatter_flag comment String Indicator flag for the acoustic backscatter sensor which can vary by mission. A value of 0 indicates measurements were taken with a 750kHz Sontek ADP. A value of 1 indicates measurements were taken with a 1MHz Nortek AD2CP. Prior to 2013, Spray deployments used a 750kHz Sontek ADP, in 2013 Spray gliders transitioned to using 1MHz Nortek AD2CP.
attribute acoustic_backscatter_flag coordinates String time z longitude latitude
attribute acoustic_backscatter_flag ioos_category String Identifier
attribute acoustic_backscatter_flag non_null_count String 466500
variable chlorophyll_a   double  
attribute chlorophyll_a _ChunkSizes uint 10, 70000
attribute chlorophyll_a _FillValue double -9999.9
attribute chlorophyll_a actual_range double 0.08571428571428572, 12.272699999999999
attribute chlorophyll_a comment String Chlorophyll-a concentration estimated from fluorescence measurements.
attribute chlorophyll_a coordinates String time z longitude latitude
attribute chlorophyll_a ioos_category String Ocean Color
attribute chlorophyll_a long_name String Chlorophyll-a concentration
attribute chlorophyll_a non_null_count String 346988
attribute chlorophyll_a standard_name String mass_concentration_of_chlorophyll_a_in_sea_water
attribute chlorophyll_a units String mg m-3
variable crs   int  
attribute crs actual_range int -2147483647, -2147483647
attribute crs ioos_category String Unknown
attribute crs non_null_count String 0
variable doxy   double  
attribute doxy _ChunkSizes uint 10, 70000
attribute doxy _FillValue double -9999.9
attribute doxy actual_range double 10.813453014234419, 349.14293611009697
attribute doxy coordinates String time z longitude latitude
attribute doxy ioos_category String Dissolved O2
attribute doxy long_name String Dissolved oxygen
attribute doxy non_null_count String 342874
attribute doxy standard_name String moles_of_oxygen_per_unit_mass_in_sea_water
attribute doxy units String micromol kg-1
variable lat_uv   double  
attribute lat_uv _ChunkSizes uint 10, 70000
attribute lat_uv _FillValue double -9999.9
attribute lat_uv actual_range double 36.75764, 38.59229069789592
attribute lat_uv comment String The estimated latitude of the midpoint of the dive.
For a glider profiling continuously, this latitude is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the latitude to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive
attribute lat_uv coordinates String time z longitude latitude
attribute lat_uv ioos_category String Location
attribute lat_uv long_name String Latitude
attribute lat_uv non_null_count String 483200
attribute lat_uv standard_name String latitude
attribute lat_uv units String degrees_north
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double -9999.9
attribute latitude actual_range double 36.75746, 38.59224104684388
attribute latitude axis String Y
attribute latitude comment String The estimated latitude of the midpoint of the profile.
For a glider profiling continuously, this latitude is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the latitude to use with the temperature and salinity variables, which are measured on the ascent only.
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude non_null_count String 700000
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable lon_uv   double  
attribute lon_uv _ChunkSizes uint 10, 70000
attribute lon_uv _FillValue double -9999.9
attribute lon_uv actual_range double -126.895925, -121.99557
attribute lon_uv comment String The estimated longitude of the midpoint of the dive.
For a glider profiling continuously, this longitude is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the longitude to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive
attribute lon_uv coordinates String time z longitude latitude
attribute lon_uv ioos_category String Location
attribute lon_uv long_name String Longitude
attribute lon_uv non_null_count String 483200
attribute lon_uv standard_name String longitude
attribute lon_uv units String degrees_east
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double -9999.9
attribute longitude actual_range double -126.8960425, -121.996485
attribute longitude axis String X
attribute longitude comment String The estimated longitude of the midpoint of the profile.
For a glider profiling continuously, this longitude is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the longitude to use with the temperature and salinity variables, which are measured on the ascent only.
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude non_null_count String 700000
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable mission   int  
attribute mission _ChunkSizes uint 10, 70000
attribute mission _FillValue int -9999
attribute mission actual_range int 9, 18
attribute mission comment String ATTENTION, please use trajectory_index instead. - This dataset combines several underwater glider missions, i.e. several deployments. Profiles originated from the same mission have the same trajectory_index number. The names of the missions can be obtained from the variable mission_name, so that trajectory_index=0 relates to the first item in the variable mission_name.
attribute mission coordinates String time z longitude latitude
attribute mission ioos_category String Identifier
attribute mission long_name String Mission name of each trajectory
attribute mission non_null_count String 483200
variable mission_profile   int  
attribute mission_profile _ChunkSizes uint 10, 70000
attribute mission_profile _FillValue int -9999
attribute mission_profile actual_range int 1, 1418
attribute mission_profile coordinates String time z longitude latitude
attribute mission_profile ioos_category String Unknown
attribute mission_profile long_name String Profile of one mission
attribute mission_profile non_null_count String 483200
variable salinity   double  
attribute salinity _ChunkSizes uint 10, 70000
attribute salinity _FillValue double -9999.9
attribute salinity actual_range double 31.812863636363645, 34.3055
attribute salinity coordinates String time z longitude latitude
attribute salinity ioos_category String Salinity
attribute salinity long_name String Sea Water Salinity
attribute salinity non_null_count String 349681
attribute salinity standard_name String sea_water_practical_salinity
attribute salinity units String 1
variable temperature   double  
attribute temperature _ChunkSizes uint 10, 70000
attribute temperature _FillValue double -9999.9
attribute temperature actual_range double 4.6935, 19.679166666666667
attribute temperature coordinates String time z longitude latitude
attribute temperature ioos_category String Temperature
attribute temperature long_name String Sea Water Temperature
attribute temperature non_null_count String 349949
attribute temperature standard_name String sea_water_temperature
attribute temperature units String degree_C
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.684974548E9, 1.766432717E9
attribute time axis String T
attribute time comment String The estimated time of the midpoint of the profile.
For a glider profiling continuously, this time is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the time to use with the temperature and salinity variables, which are measured on the ascent only.
attribute time ioos_category String Time
attribute time long_name String Time
attribute time non_null_count String 700000
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable time_uv   double  
attribute time_uv _ChunkSizes uint 10, 70000
attribute time_uv actual_range double 1.684973847E9, 1.766431977E9
attribute time_uv calendar String standard
attribute time_uv comment String The estimated time of the midpoint of the dive.
For a glider profiling continuously, this time is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the time to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive.
attribute time_uv coordinates String time z longitude latitude
attribute time_uv ioos_category String Time
attribute time_uv long_name String Time
attribute time_uv non_null_count String 483200
attribute time_uv standard_name String time
attribute time_uv time_origin String 01-JAN-1970 00:00:00
attribute time_uv units String seconds since 1970-01-01T00:00:00Z
variable trajectory   int  
attribute trajectory actual_range int 9, 18
attribute trajectory cf_role String trajectory_id
attribute trajectory ioos_category String Identifier
attribute trajectory long_name String trajectory identifier
attribute trajectory non_null_count String 700000
variable u   double  
attribute u _ChunkSizes uint 10, 70000
attribute u _FillValue double -9999.9
attribute u actual_range double -0.7831969709885815, 0.650239617381544
attribute u comment String Zonal component of the water velocity measured with ADCP on different depths.
attribute u coordinates String time z longitude latitude
attribute u ioos_category String Currents
attribute u long_name String Eastward Sea Water Velocity
attribute u non_null_count String 331256
attribute u standard_name String eastward_sea_water_velocity
attribute u units String m s-1
variable u_depth_mean   double  
attribute u_depth_mean _ChunkSizes uint 10, 70000
attribute u_depth_mean _FillValue double -9999.9
attribute u_depth_mean actual_range double -0.3787176585415744, 0.28220631616933617
attribute u_depth_mean comment String Depth-averaged water velocity (zonal component) which is an average throughout the dive as defined by Rudnick et. al. 2018 (doi: 10.1175/JTECH-D-17-0200.1).
attribute u_depth_mean coordinates String time z longitude latitude
attribute u_depth_mean ioos_category String Currents
attribute u_depth_mean long_name String Depth-Averaged Eastward Sea Water Velocity
attribute u_depth_mean non_null_count String 346000
attribute u_depth_mean standard_name String eastward_sea_water_velocity
attribute u_depth_mean units String m s-1
variable v   double  
attribute v _ChunkSizes uint 10, 70000
attribute v _FillValue double -9999.9
attribute v actual_range double -0.8700131823549265, 0.7982526362413087
attribute v comment String Meridional component of the water velocity measured with ADCP on different depths.
attribute v coordinates String time z longitude latitude
attribute v ioos_category String Currents
attribute v long_name String Northward Sea Water Velocity
attribute v non_null_count String 331256
attribute v standard_name String northward_sea_water_velocity
attribute v units String m s-1
variable v_depth_mean   double  
attribute v_depth_mean _ChunkSizes uint 10, 70000
attribute v_depth_mean _FillValue double -9999.9
attribute v_depth_mean actual_range double -0.38693729680078864, 0.35790437322864527
attribute v_depth_mean comment String Depth-averaged water velocity (meridional component) which is an average throughout the dive as defined by Rudnick et. al. 2018 (doi: 10.1175/JTECH-D-17-0200.1).
attribute v_depth_mean coordinates String time z longitude latitude
attribute v_depth_mean ioos_category String Currents
attribute v_depth_mean long_name String Depth-Averaged Northward Sea Water Velocity
attribute v_depth_mean non_null_count String 346000
attribute v_depth_mean standard_name String northward_sea_water_velocity
attribute v_depth_mean units String m s-1
variable z   double  
attribute z _FillValue double -9999.9
attribute z actual_range double 10.0, 500.0
attribute z axis String Z
attribute z ioos_category String Location
attribute z non_null_count String 700000

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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