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Dataset Title:  In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen,
temperature and salinity for a time-series in Bermuda, September 2017
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_783568)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 time (Date Time UTC, UTC) ?          2017-09-01T14:30Z    2017-09-22T14:44Z
  < slider >
 CTD_Sal_7m (unitless) ?          36.4229    36.6601
 CTD_Temp_7m (degrees Celsius) ?          27.46    29.13
 S22_pCO2_surface (micro-atmospheres (uatm)) ?          434.0    604.38
 S22_Temp_surface (degrees Celsius) ?          27.4    29.34
 S22_DO_surface (micromol/kilogram (umol/kg)) ?          189.014    332.279
 S53_pCO2_7m (micro-atmospheres (uatm)) ?          440.93    591.09
 S53_Temp_7m (degrees Celsius) ?          27.45    29.14
 S53_DO_7m (micromol/kilogram (umol/kg)) ?          165.041    283.468
 S13_pH_7m (unitless; pH scale) ?          7.8945    8.0292
 S13_Temp_7m (degrees Celsius) ?          27.44    29.12
 SA03_Date_UTC (unitless) ?          "2017-09-01T18:01Z"    "NaN"
 SA03_Alkalinity_7m (micromol/kilogram (umol/kg)) ?          2301.8    2383.3
 SA03_Temp_7m (degrees Celsius) ?          27.46    29.14
 Benchtop_Date_UTC (unitless) ?          "2017-09-02T17:02Z"    "NaN"
 Benchtop_Alkalinity (micromol/kilogram (umol/kg)) ?          2323.2    2348.0
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5042762e+9, 1.50609144e+9;
    String axis "T";
    String bcodmo_name "ISO_DateTime_UTC";
    String description "sample collection date and time in UTC time; ISO-formatted as YYYY-MM-DDTHH:MMZ";
    String ioos_category "Time";
    String long_name "Date Time UTC";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
    String source_name "Date_Time_UTC";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  CTD_Sal_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 36.4229, 36.6601;
    String bcodmo_name "sal";
    String description "salinity from CTD at 7 meters depth";
    String long_name "CTD Sal 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/";
    String units "unitless";
  }
  CTD_Temp_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 27.46, 29.13;
    String bcodmo_name "temperature";
    String description "temperature from CTD at 7 meters depth";
    String long_name "CTD Temp 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees Celsius";
  }
  S22_pCO2_surface {
    Float32 _FillValue NaN;
    Float32 actual_range 434.0, 604.38;
    String bcodmo_name "pCO2";
    String description "SAMI-22 surface pCO2";
    String long_name "S22 P CO2 Surface";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PCO2C101/";
    String units "micro-atmospheres (uatm)";
  }
  S22_Temp_surface {
    Float32 _FillValue NaN;
    Float32 actual_range 27.4, 29.34;
    String bcodmo_name "temperature";
    String description "SAMI-22 surface temperature";
    String long_name "S22 Temp Surface";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees Celsius";
  }
  S22_DO_surface {
    Float32 _FillValue NaN;
    Float32 actual_range 189.014, 332.279;
    String bcodmo_name "dissolved Oxygen";
    String description "SAMI-22 surface dissolved oxygen concentration";
    String long_name "S22 DO Surface";
    String units "micromol/kilogram (umol/kg)";
  }
  S53_pCO2_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 440.93, 591.09;
    String bcodmo_name "pCO2";
    String description "SAMI-53 pCO2 at 7 meters depth";
    String long_name "S53 P CO2 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PCO2C101/";
    String units "micro-atmospheres (uatm)";
  }
  S53_Temp_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 27.45, 29.14;
    String bcodmo_name "temperature";
    String description "SAMI-53 temperature at 7 meters depth";
    String long_name "S53 Temp 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees Celsius";
  }
  S53_DO_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 165.041, 283.468;
    String bcodmo_name "dissolved Oxygen";
    String description "SAMI-53 dissolved oxygen at 7 meters depth";
    String long_name "S53 DO 7m";
    String units "micromol/kilogram (umol/kg)";
  }
  S13_pH_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 7.8945, 8.0292;
    String bcodmo_name "pH";
    String description "SAMI-13 pH at 7 meters depth";
    String long_name "S13 P H 7M";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PHXXZZXX/";
    String units "unitless; pH scale";
  }
  S13_Temp_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 27.44, 29.12;
    String bcodmo_name "temperature";
    String description "SAMI-13 temperature at 7 meters depth";
    String long_name "S13 Temp 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees Celsius";
  }
  SA03_Date_UTC {
    String bcodmo_name "ISO_DateTime_UTC";
    String description "SAMI-Alkalinity_03 UTC sample date and time; ISO-formatted as YYYY-MM-DDTHH:MMZ";
    String long_name "SA03 Date UTC";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
    String units "unitless";
  }
  SA03_Alkalinity_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 2301.8, 2383.3;
    String bcodmo_name "TALK";
    String description "SAMI-Alkalinity_03 alkalinity at 7 meters depth";
    String long_name "SA03 Alkalinity 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/MDMAP014/";
    String units "micromol/kilogram (umol/kg)";
  }
  SA03_Temp_7m {
    Float32 _FillValue NaN;
    Float32 actual_range 27.46, 29.14;
    String bcodmo_name "temperature";
    String description "SAMI-Alkalinity_03 temperature at 7 meters depth";
    String long_name "SA03 Temp 7m";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
    String units "degrees Celsius";
  }
  Benchtop_Date_UTC {
    String bcodmo_name "ISO_DateTime_UTC";
    String description "UTC sample date and time; ISO-formatted as YYYY-MM-DDTHH:MMZ";
    String long_name "Benchtop Date UTC";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/";
    String units "unitless";
  }
  Benchtop_Alkalinity {
    Float32 _FillValue NaN;
    Float32 actual_range 2323.2, 2348.0;
    String bcodmo_name "TALK";
    String description "alkalinity measured using a benchtop unit";
    String long_name "Benchtop Alkalinity";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/MDMAP014/";
    String units "micromol/kilogram (umol/kg)";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"The instruments were deployed on Hog Reef, Bermuda (32.46 oN, 64.83 oW),
attached to the PMEL MAPCO2 buoy for the surface measurements, and anchored to
the reef below the buoy at ~7 meters depth.
 
Real-time temperature, pCO2, pH, salinity, alkalinity and dissolved oxygen
were determined in situ. Discrete samples were collected and stored in glass
bottles, preserved with HgCl2.
 
SAMI-CO2 sampled on a 15 minute interval. SAMI-CO2 ran a non-absorbing blank
measurement every 3.5 days.\\u00a0
 
SAMI-pH sampled on a 15 minute interval.
 
SAMI-Alk sampled on a 2 hour interval. SAMI-Alk ran a non-absorbing blank
measurement for every measurement. A standard was run every 22 hours.
 
Dissolved oxygen was sampled on a 15 minute interval.
 
Temperature was recorded with SAMI-CO2, SAMI-pH on a 15 minute interval and
with CTD on a 15 minute interval.
 
Salinity was recorded with CTD on a 15 minute interval.";
    String awards_0_award_nid "779419";
    String awards_0_award_number "OCE-1459255";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1459255";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "Henrietta N Edmonds";
    String awards_0_program_manager_nid "51517";
    String cdm_data_type "Other";
    String comment 
"In situ biogeochemical data 
   pCO2, pH, alkalinity, oxygen, temperature and salinity time series data in Bermuda 2017 
   PI: M. DeGrandpre (UMontana) 
   data version: 2019-12-05";
    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 "2019-12-05T14:47:21Z";
    String date_modified "2020-03-10T20:43:17Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.783568.1";
    String history 
"2022-01-23T05:10:08Z (local files)
2022-01-23T05:10:08Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_783568.html";
    String infoUrl "https://www.bco-dmo.org/dataset/783568";
    String institution "BCO-DMO";
    String instruments_0_acronym "CTD Sea-Bird";
    String instruments_0_dataset_instrument_description "CTD sensor measures conductivity, temperature and depth.";
    String instruments_0_dataset_instrument_nid "783575";
    String instruments_0_description "Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/130/";
    String instruments_0_instrument_name "CTD Sea-Bird";
    String instruments_0_instrument_nid "447";
    String instruments_0_supplied_name "CTD (Sea-Bird)";
    String instruments_1_acronym "SAMI";
    String instruments_1_dataset_instrument_description "Measures and logs levels of pCO2 in sea and freshwater. It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA). For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.";
    String instruments_1_dataset_instrument_nid "783572";
    String instruments_1_description "The Submersible Autonomous Moored Instrument (SAMI) measures and logs levels of dissolved chemicals in sea and fresh water.  It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA).  For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.";
    String instruments_1_instrument_name "Submersible Autonomous Moored Instrument";
    String instruments_1_instrument_nid "562";
    String instruments_1_supplied_name "SAMI-CO2 (Sunburst Sensors)";
    String instruments_2_acronym "SAMI";
    String instruments_2_dataset_instrument_description "SAMI-pH measures and logs levels of pH in sea and freshwater.";
    String instruments_2_dataset_instrument_nid "783573";
    String instruments_2_description "The Submersible Autonomous Moored Instrument (SAMI) measures and logs levels of dissolved chemicals in sea and fresh water.  It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA).  For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.";
    String instruments_2_instrument_name "Submersible Autonomous Moored Instrument";
    String instruments_2_instrument_nid "562";
    String instruments_2_supplied_name "SAMI-pH (Sunburst Sensors)";
    String instruments_3_acronym "SAMI";
    String instruments_3_dataset_instrument_description "SAMI-Alk measures and logs levels of alkalinity in sea and fresh water.";
    String instruments_3_dataset_instrument_nid "783574";
    String instruments_3_description "The Submersible Autonomous Moored Instrument (SAMI) measures and logs levels of dissolved chemicals in sea and fresh water.  It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA).  For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.";
    String instruments_3_instrument_name "Submersible Autonomous Moored Instrument";
    String instruments_3_instrument_nid "562";
    String instruments_3_supplied_name "SAMI-Alk (Sunburst Sensors)";
    String keywords "alkalinity, altimetry, bco, bco-dmo, benchtop, Benchtop_Alkalinity, Benchtop_Date_UTC, biological, carbon, carbon dioxide, chemical, co2, conductivity, ctd, CTD_Sal_7m, CTD_Temp_7m, data, dataset, date, depth, dioxide, dmo, erddap, laboratory, management, oceanography, office, preliminary, s13, S13_pH_7m, S13_Temp_7m, s22, S22_DO_surface, S22_pCO2_surface, S22_Temp_surface, s53, S53_DO_7m, S53_pCO2_7m, S53_Temp_7m, sa03, SA03_Alkalinity_7m, SA03_Date_UTC, SA03_Temp_7m, sal, satellite, sonde, surface, temperature, time";
    String license "https://www.bco-dmo.org/dataset/783568/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/783568";
    String param_mapping "{'783568': {'Date_Time_UTC': 'flag - time'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/783568/parameters";
    String people_0_affiliation "University of Montana";
    String people_0_person_name "Dr Michael DeGrandpre";
    String people_0_person_nid "50683";
    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 "Bermuda Biochem Timeseries";
    String projects_0_acronym "Bermuda Biochem Timeseries";
    String projects_0_description 
"NSF abstract:
The ocean inorganic carbon system is of great interest to marine scientists, and indeed all people, because it contains important information about ocean productivity, the sources and sinks of anthropogenic carbon dioxide, and ocean acidification. Total alkalinity is one of the critical inorganic carbon parameters and has been widely measured through ship and laboratory-based methodologies. At this time, there are no commercially-available in situ sensors for total alkalinity. In this project, researchers at the University of Montana will further develop and test a new autonomous system, known as the SAMI-alk, for measuring total alkalinity. This new system will expand understanding of total alkalinity and the inorganic carbon cycle by making near continuous measurements in locations not frequented by ships. The development of this instrument will have important broader implications for the oceanographic community and ocean acidification research by providing a novel instrument for ocean research. This project will also provide training opportunities to graduate and undergraduate students, and will continue to support public outreach on ocean acidification through a university-affiliated museum.
Studies focused on the marine carbon cycle and ocean acidification pose a number of measurement challenges. While pH is the ocean acidification \"smoking gun\" and partial pressure of CO2 is critical for gas exchange calculations, the full inorganic carbon system must be quantified for most inorganic carbon studies. Using autonomous sensors to accurately and precisely quantify all of the inorganic carbon species has been a long-standing objective for marine biogeochemists, but full characterization of the inorganic carbon system has, until recently, been limited to ship and laboratory-based measurements. Total alkalinity is one such parameter as its research has been limited by the lack of instrument capable of making in situ measurements. This research will address this problem and advance inorganic carbon studies through the further development of an autonomous, in situ system to measure seawater total alkalinity, known as the submersible autonomous moored instrument for total alkalinity (SAMI-alk). Preliminary testing of the instrument showed great promise, and through this project, researchers will conduct lab experiments to improve its performance. Two new prototype instruments will be tested in laboratory and field evaluations.";
    String projects_0_end_date "2019-05";
    String projects_0_geolocation "Bermuda";
    String projects_0_name "A new tool for ocean carbon cycle and ocean acidification studies";
    String projects_0_project_nid "779420";
    String projects_0_start_date "2015-06";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017.";
    String time_coverage_end "2017-09-22T14:44Z";
    String time_coverage_start "2017-09-01T14:30Z";
    String title "In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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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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