Accessing BCO-DMO data
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| Dataset Title: | [ice_optics] - Ice optical properties: transmittance and albedo from ARSV Laurence M. Gould LMG0106, LMG0205 in the Southern Ocean from 2001- 2002 (SOGLOBEC project) (U.S. GLOBEC Southern Ocean) 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_3124) |
| Information: | Summary
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| FGDC
| ISO 19115
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Attributes {
s {
cruise_id {
String bcodmo_name "cruise_id";
String description "cruise designation; name";
String long_name "Cruise Id";
}
year {
Int16 _FillValue 32767;
Int16 actual_range 2001, 2002;
String bcodmo_name "year";
String description "year, reported as YYYY, e.g. 1995";
String long_name "Year";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/";
}
date_local {
String bcodmo_name "date_local";
String description "local month, day and year";
String long_name "Date Local";
String source_name "date_local";
String time_precision "1970-01-01";
}
month_local {
String bcodmo_name "month_local";
String description "month of year, local time , i.e. 01-12";
String long_name "Month Local";
}
day_local {
String bcodmo_name "day_local";
String description "day, local time e.g. 22.";
String long_name "Day Local";
}
time_local {
Int16 _FillValue 32767;
Int16 actual_range 1100, 1313;
String bcodmo_name "time_local";
String description "time of day, local time, using 2400 clock format";
String long_name "Time Local";
}
yrday_local {
Float32 _FillValue NaN;
Float32 actual_range 219.5507, 251.5417;
String bcodmo_name "yrday_local";
String description "local day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon).";
String long_name "Yrday Local";
}
event {
Int16 _FillValue 32767;
Int16 actual_range 91, 242;
String bcodmo_name "event";
String description "event or operation number";
String long_name "Event";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue NaN;
Float64 actual_range -68.0, -65.5233;
String axis "Y";
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "latitude, in decimal degrees, North is positive, negative denotes South";
String ioos_category "Location";
String long_name "Latitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue NaN;
Float64 actual_range -71.5167, -68.485;
String axis "X";
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "longitude, in decimal degrees, East is positive, negative denotes West";
String ioos_category "Location";
String long_name "Longitude";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
String standard_name "longitude";
String units "degrees_east";
}
ice_thick {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 31, 80;
String bcodmo_name "ice_thickness";
String description "ice thickness";
String long_name "Ice Thick";
String units "centimeters";
}
freebd {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 6;
String bcodmo_name "unknown";
String description "freeboard: the distance from sea level to the ice surface";
String long_name "Freebd";
String units "centimeters";
}
snow_depth {
String bcodmo_name "snow_thickness";
String description "snow thickness";
String long_name "Snow Depth";
String units "centimeters";
}
coverage {
String bcodmo_name "unknown";
String description "whether ice is covered with snow or shoveled bare for measurement";
String long_name "Coverage";
}
wavelength {
String bcodmo_name "wavelength";
String description "wavelength";
String long_name "Wavelength";
String units "nanometers";
}
albedo {
String bcodmo_name "unknown";
String description "the ratio of diffusely reflected to incident electromagnetic radiation";
String long_name "Albedo";
String units "unitless";
}
trans {
String bcodmo_name "transmission";
String description "light transmission, as percent";
String long_name "Trans";
}
trans45R {
String bcodmo_name "transmission";
String description "light transmission readings were taken by rotating the underwater detector 45 degrees clockwise";
String long_name "Trans45 R";
String units "percent";
}
trans45L {
String bcodmo_name "transmission";
String description "light transmission readings were taken by rotating the underwater detector 45 degrees counterclockwise";
String long_name "Trans45 L";
String units "percent";
}
trans90R {
Float32 _FillValue NaN;
Float32 actual_range 6.7e-4, 0.04248;
String bcodmo_name "transmission";
String description "light transmission readings were taken by rotating the underwater detector 90 degrees clockwise";
String long_name "Trans90 R";
String units "percent";
}
sky_condition {
String bcodmo_name "unknown";
String description "sky condition as in amount of cloudiness";
String long_name "Sky Condition";
}
comments {
String bcodmo_name "comment";
String description "free text comments";
String long_name "Comments";
}
}
NC_GLOBAL {
String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
String acquisition_description
"From 2001 cruise report: The optics of the different sea ice types found in
the region. When weather and day light permitted, snow and ice albedo and
transmission measurements were taken. At only one site was the surface frozen
where we could measure the combined snow and ice albedo and transmission and
then shovel the area and re-measuring to subtract out the snow component. This
will allow us to sort out what component the snow and ice have individually in
the transmission of light into the ice and water column for the organisms to
grow. Our measurements were hampered due to blowing snow which we experienced
nearly every day and the fact that we needed to be stopped near solar noon as
the sun angle is low this time of year, so only a limited number of optics
measurements were performed.
From 2002 cruise report: We also measured the optics of the sea ice using a
scanning spectral radiometer. This instrument measures the light levels in 0.5
nanometer increments from 380 to 800 nanometers (visible light through the
near infrared). With this instrument we made optical measurements on seven
different ice floes. We performed these measurements through the undisturbed
snow and ice, and would then shovel off the area to obtain measurements of
just the sea ice with no snow cover. We first measured snow and bare ice
albedo, then upwelling irradiance at 1 cm increments as we lowered the sensor
down through the snow cover. We then would drill a hole in the ice and measure
upwelling irradiance at 2 cm to 5 cm increment down through the ice sheet both
before and after removing the snow cover. Additionally, the transmission of
light through both snow covered sea ice and bare ice was measured.";
String awards_0_award_nid "54641";
String awards_0_award_number "ANT-9910122";
String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=9910122";
String awards_0_funder_name "NSF Antarctic Sciences";
String awards_0_funding_acronym "NSF ANT";
String awards_0_funding_source_nid "369";
String awards_0_program_manager "Bernhard Lettau";
String awards_0_program_manager_nid "51516";
String awards_1_award_nid "54794";
String awards_1_award_number "ANT-9910179";
String awards_1_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=9910179";
String awards_1_funder_name "NSF Antarctic Sciences";
String awards_1_funding_acronym "NSF ANT";
String awards_1_funding_source_nid "369";
String awards_1_program_manager "Professor Kelly Falkner";
String awards_1_program_manager_nid "51477";
String cdm_data_type "Other";
String comment
"ice optics: transmittance and albedos
SOGLOBEC: LMG-0106, LMG-0205
PI: D. Martinson";
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 "2010-06-16T20:40:39Z";
String date_modified "2020-01-22T15:55:51Z";
String defaultDataQuery "&time<now";
String doi "10.1575/1912/bco-dmo.3124.1";
Float64 Easternmost_Easting -68.485;
Float64 geospatial_lat_max -65.5233;
Float64 geospatial_lat_min -68.0;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -68.485;
Float64 geospatial_lon_min -71.5167;
String geospatial_lon_units "degrees_east";
String history
"2024-12-22T06:28:27Z (local files)
2024-12-22T06:28:27Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_3124.html";
String infoUrl "https://www.bco-dmo.org/dataset/3124";
String institution "BCO-DMO";
String keywords "albedo, bco, bco-dmo, biological, chemical, comments, condition, coverage, cruise, cruise_id, data, dataset, date, day, day_local, depth, dmo, erddap, event, freebd, ice, ice_thick, latitude, local, longitude, management, month, month_local, oceanography, office, preliminary, sky, sky_condition, snow, snow_depth, thick, time, time_local, trans, trans45, trans45L, trans45R, trans90, trans90R, wavelength, year, yrday, yrday_local";
String license "https://www.bco-dmo.org/dataset/3124/license";
String metadata_source "https://www.bco-dmo.org/api/dataset/3124";
Float64 Northernmost_Northing -65.5233;
String param_mapping "{'3124': {'lat': 'master - latitude', 'lon': 'master - longitude'}}";
String parameter_source "https://www.bco-dmo.org/mapserver/dataset/3124/parameters";
String people_0_affiliation "Lamont-Doherty Earth Observatory";
String people_0_affiliation_acronym "LDEO";
String people_0_person_name "Dr Doug Martinson";
String people_0_person_nid "51059";
String people_0_role "Principal Investigator";
String people_0_role_type "originator";
String people_1_affiliation "Cold Regions Research and Engineering Laboratory";
String people_1_affiliation_acronym "CRREL";
String people_1_person_name "Dr Don Perovich";
String people_1_person_nid "51060";
String people_1_role "Co-Principal Investigator";
String people_1_role_type "originator";
String people_2_affiliation "University of California-Santa Barbara";
String people_2_affiliation_acronym "UCSB-NCEAS";
String people_2_person_name "Dr Raymond Smith";
String people_2_person_nid "50852";
String people_2_role "Co-Principal Investigator";
String people_2_role_type "originator";
String people_3_affiliation "Woods Hole Oceanographic Institution";
String people_3_affiliation_acronym "WHOI BCO-DMO";
String people_3_person_name "Nancy Copley";
String people_3_person_nid "50396";
String people_3_role "BCO-DMO Data Manager";
String people_3_role_type "related";
String project "SOGLOBEC";
String projects_0_acronym "SOGLOBEC";
String projects_0_description "The fundamental objectives of United States Global Ocean Ecosystems Dynamics (U.S. GLOBEC) Program are dependent upon the cooperation of scientists from several disciplines. Physicists, biologists, and chemists must make use of data collected during U.S. GLOBEC field programs to further our understanding of the interplay of physics, biology, and chemistry. Our objectives require quantitative analysis of interdisciplinary data sets and, therefore, data must be exchanged between researchers. To extract the full scientific value, data must be made available to the scientific community on a timely basis.";
String projects_0_geolocation "Southern Ocean";
String projects_0_name "U.S. GLOBEC Southern Ocean";
String projects_0_project_nid "2039";
String projects_0_project_website "http://www.ccpo.odu.edu/Research/globec_menu.html";
String projects_0_start_date "2001-01";
String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
String publisher_type "institution";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -68.0;
String standard_name_vocabulary "CF Standard Name Table v55";
String summary "Ice optical properties: transmittance and albedo from ARSV Laurence M. Gould LMG0106, LMG0205 in the Southern Ocean from 2001-2002 (SOGLOBEC project).";
String title "[ice_optics] - Ice optical properties: transmittance and albedo from ARSV Laurence M. Gould LMG0106, LMG0205 in the Southern Ocean from 2001-2002 (SOGLOBEC project) (U.S. GLOBEC Southern Ocean)";
String version "1";
Float64 Westernmost_Easting -71.5167;
String xml_source "osprey2erddap.update_xml() v1.3";
}
}
Data Access Protocol (DAP) and its
selection constraints.
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.