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ERDDAP
Easier access to scientific data |
Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | Nitrate (15N) Uptake from samples collected aboard Palmer LTER annual cruises off the Western Antarctic Peninsula, 2012-2014 
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| Institution: | National Science Foundation (Dataset ID: CruiseNitrateUptake) |
| Information: | Summary
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Attributes {
s {
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 0.0, 75.0;
String axis "Z";
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
Float64 column_id 5424;
String column_name "col_5424";
String ioos_category "Location";
String long_name "Depth";
String lter_column_description "Sample depth";
String lter_column_name "Depth";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "m";
String lter_units_string "meter";
String positive "down";
String standard_name "depth";
String units "m";
String units_conventions "AND-LTER,BNZ-LTER,CDR-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER";
}
incubation_light_level {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 10.0, 100.0;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
Float64 column_id 5425;
String column_name "col_5425";
String ioos_category "Unknown";
String long_name "Incubation Light Level";
String lter_column_description "Percent Surface Irradiance";
String lter_column_name "Incubation Light Level";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "%";
String lter_units_string "percent";
String units "percent";
String units_conventions "BNZ-LTER,CAP-LTER,CDR-LTER,FCE-LTER,GCE-LTER,HBR-LTER,KNZ-LTER,MCM-LTER,NTL-LTER,NWT-LTER,PAL-LTER,PIE-LTER,SGS-LTER";
}
nitrate {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 0.0, 34.4;
Float64 colorBarMaximum 50.0;
Float64 colorBarMinimum 0.0;
Float64 column_id 5426;
String column_name "col_5426";
String ioos_category "Dissolved Nutrients";
String long_name "Mole Concentration Of Nitrate In Sea Water";
String lter_column_description "Nitrate";
String lter_column_name "Nitrate";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "µmol/L";
String lter_units_string "micromolePerLiter";
String standard_name "mole_concentration_of_nitrate_in_sea_water";
String units "micromoles L-1";
String units_conventions "HFR-LTER,PAL-LTER,PIE-LTER";
}
nitrate_uptake {
Float64 _FillValue 9.969209968386869e+36;
Float64 actual_range 4.18509e-4, 2.367106393;
Float64 colorBarMaximum 50.0;
Float64 colorBarMinimum 0.0;
Float64 column_id 5428;
String column_name "col_5428";
String ioos_category "Dissolved Nutrients";
String long_name "Mole Concentration Of Nitrate In Sea Water";
String lter_column_description "Uptake of dissolved NO3 by phytoplankton";
String lter_column_name "Nitrate Uptake";
String lter_mscale "ratio";
String lter_num_type "real";
String lter_units "µmol/L/day";
String lter_units_string "micromolePerLiterPerDay";
String standard_name "mole_concentration_of_nitrate_in_sea_water";
String units "micromoles L-1 day-1";
String units_conventions "PAL-LTER";
}
station {
Float64 column_id 5420;
String column_name "col_5420";
String ioos_category "Identifier";
String long_name "Station";
String lter_column_description "Palmer sampling grid nominal station";
String lter_column_name "Station";
String lter_mscale "nominal";
}
cast_number {
Int16 _FillValue 32767;
Int16 actual_range 0, 61;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
Float64 column_id 5421;
String column_name "col_5421";
String ioos_category "Statistics";
String long_name "Cast Number";
String lter_column_description "Sequential CTD cast identifier";
String lter_column_name "Cast";
String lter_mscale "nominal";
}
event {
Int16 _FillValue 32767;
Int16 actual_range 0, 522;
Float64 column_id 5422;
String column_name "col_5422";
String ioos_category "Unknown";
String long_name "Event";
String lter_column_description "Sequential cruise sampling event number";
String lter_column_name "Event";
String lter_mscale "nominal";
}
bottle_number {
Int16 _FillValue 32767;
Int16 actual_range 0, 23;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
Float64 column_id 5423;
String column_name "col_5423";
String ioos_category "Statistics";
String long_name "Bottle Number";
String lter_column_description "CTD rosette bottle number";
String lter_column_name "Niskin";
String lter_mscale "nominal";
}
}
NC_GLOBAL {
String acknowledgement "Funding and support provided by the National Science Foundation";
String cdm_data_type "Other";
String comment "The Palmer, Antarctica, Long-Term Ecological Research project is a member site of the Long-Term Ecological Research program, a network of sites investigating diverse biomes. A team of researchers seeks to understand the structure and function of the Western Antarctic Peninsula's marine and terrestrial ecosystems in the context of seasonal-to-interannual atmospheric and sea ice dynamics, as well as long-term climate change. The PAL measurement system (or grid) is designed to study marine and terrestrial food webs consisting principally of diatom primary producers, the dominant herbivore Antarctic krill, and the apex predator Adelie penguin. An attenuated microbial food web is also a focus. PAL studies these ecosystems annually over a regional scale grid of oceanographic stations and seasonally at Palmer Station. \\n\\nPalmer Station is located on Anvers Island west of the Antarctic Peninula. The peninsula runs perpendicular to a strong climatic gradient between the cold, dry continental regime to the south, characteristic of the Antarctic interior, and the warm, moist, maritime regime to the north. North-south shifts in the gradient give rise to large environmental variability to climate change. Sea ice extent and variability affects ecosystem changes at all trophic levels. In addition to the long-term field and research activities, information management, graduate student training, education and outreach are an integral part of the program.";
String contributor_email "mstukel@fsu.edu";
String contributor_name "Mike Stukel";
String contributor_role "PrincipalInvestigator";
String contributor_role_vocabulary "https://vocab.nerc.ac.uk/collection/G04/current/";
String Conventions "CF-1.8, ACDD-1.3, COARDS";
String creator_country "USA";
String creator_email "kerfoot@marine.rutgers.edu";
String creator_institution "Rutgers University";
String creator_name "John Kerfoot";
String creator_sector "academic";
String creator_type "person";
String creator_url "https://rucool.marine.rutgers.edu";
String datazoo_dataset_id "276";
String datazoo_datatable_id "279";
String datazoo_datatable_label "Nitrate Uptake (Cruise)";
String datazoo_datatable_name "Nitrate uptake";
String date_created "2022-03-29T14:53:23Z";
String date_issued "2022-03-29T14:53:23Z";
String geospatial_bounds_crs "EPSG:4326";
String geospatial_bounds_vertical_crs "EPSG:5831";
String geospatial_lat_resolution "0.00001 degree";
String geospatial_lat_units "degree_north";
String geospatial_lon_resolution "0.00001 degree";
String geospatial_lon_units "degree_east";
Float64 geospatial_vertical_max 75.0;
Float64 geospatial_vertical_min 0.0;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"/Users/kerfoot/data/lter/data/tsv/dat_279/dat_279.tsv
2025-05-04T04:18:01Z (local files)
2025-05-04T04:18:01Z http://pallter-data.marine.rutgers.edu/erddap/tabledap/CruiseNitrateUptake.html";
String infoUrl "https://pal.lternet.edu/";
String institution "National Science Foundation";
String keywords "carbon, incubation, nitrate, oceans, water column";
String keywords_vocabulary "LTER Controlled Vocabulary";
String license "All data contained herein is licensed under the LTER Network Data Access Policy (https://lternet.edu/data-access-policy/). In accordance with scientific publishing conventions and professional etiquette, the consumer of these data (the \"Data User\") is expected to appropriately cite these data in any publication that results from their use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur and should realize that misinterpretation of data may occur if used out of context of the original study. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the data authors. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.";
String license_link "https://lternet.edu/data-access-policy/";
String methods "General Methods: Samples (1.2-L) were collected from Niskin bottles on Palmer LTER cruises and immediately transferred to clear polycarbonate bottles. Samples were then spiked with 1.2 micromoles 15-NO3. Samples were incubated in an incubator maintained at seasurface temperature with flow-through seawater. Individual bottles were screened with a mesh screening to light levels of 100% surface irradiance, 33% irradiance, or 10% irradiance. After incubation, samples were filtered through a pre-combusted 25-mm GF/F filter and frozen at -80C. Filters were later thawed, acidified, and cut in half before being analyzed by mass spec at the UC Davis Analytical Facility. 15NO3 uptake was calculated from final PN del15N, [PN], and concentration ambient using the equations in Dugdale & Wilkerson (1986)\\n";
String naming_authority "edu.rutgers.rucool";
String product_version "1.0";
String program "LTER";
String project "Palmer LTER";
String publisher_country "USA";
String publisher_email "kerfoot@marine.rutgers.edu";
String publisher_institution "Rutgers University";
String publisher_name "John Kerfoot";
String publisher_type "person";
String publisher_url "https://rucool.marine.rutgers.edu";
String references "https://pal.lternet.edu/";
String sea_name "Southern Ocean";
String source "/Users/kerfoot/data/lter/data/tsv/dat_279/dat_279.tsv";
String sourceUrl "(local files)";
String standard_name_vocabulary "CF Standard Name Table v77";
String summary "Nitrate uptake by the bulk phytoplankton community was determined using tracer (<10%) additions of labeled 15-NO3. Samples were collected by Go-Flo from 5 depths 0, 5, 10, 20, 65 m and incubated for 24 h at light levels of 100%, 50%, 25%, 10%, and 0% surface irradiance, respectively.";
String title "Nitrate (15N) Uptake from samples collected aboard Palmer LTER annual cruises off the Western Antarctic Peninsula, 2012-2014";
}
}
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.