Accessing BCO-DMO data
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| Dataset Title: | [Aerosol REE and Th-232 data from northern Gulf of Alaska region] - Concentrations of the rare earth elements (REE) and Thorium-232 (232Th) from the northern Gulf of Alaska region (Inferring trace element inputs to North Pacific surface waters from Alaskan and Asian dust) 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_925359_v1) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
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Attributes {
s {
sample_description {
String long_name "Sample_description";
String units "unitless";
}
location_description {
String long_name "Location_description";
String units "unitless";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range 59.42144, 60.4324;
String axis "Y";
String ioos_category "Location";
String long_name "Latitude";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range -146.3493, -145.0954;
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String standard_name "longitude";
String units "degrees_east";
}
ISO_Date_UTC {
String long_name "Iso_date_utc";
String units "unitless";
}
La {
Float32 actual_range 16.14, 38.2;
String long_name "La";
String units "ppm (ug/g)";
}
Ce {
Float32 actual_range 32.74, 79.6;
String long_name "Ce";
String units "ppm (ug/g)";
}
Pr {
Float32 actual_range 3.91, 8.83;
String long_name "Pr";
String units "ppm (ug/g)";
}
Nd {
Float32 actual_range 15.95, 33.9;
String long_name "Nd";
String units "ppm (ug/g)";
}
Sm {
Float32 actual_range 3.49, 5.55;
String long_name "Sm";
String units "ppm (ug/g)";
}
Eu {
Float32 actual_range 0.89, 1.22;
String long_name "Eu";
String units "ppm (ug/g)";
}
Gd {
Float32 actual_range 3.36, 4.66;
String long_name "Gd";
String units "ppm (ug/g)";
}
Tb {
Float32 actual_range 0.51, 0.77;
String long_name "Tb";
String units "ppm (ug/g)";
}
Dy {
Float32 actual_range 3.04, 4.68;
String long_name "Dy";
String units "ppm (ug/g)";
}
Ho {
Float32 actual_range 0.6, 0.99;
String long_name "Ho";
String units "ppm (ug/g)";
}
Er {
Float32 actual_range 1.78, 2.85;
String long_name "Er";
String units "ppm (ug/g)";
}
Tm {
Float32 actual_range 0.25, 0.41;
String long_name "Tm";
String units "ppm (ug/g)";
}
Yb {
Float32 actual_range 1.58, 2.82;
String long_name "Yb";
String units "ppm (ug/g)";
}
Lu {
Float32 actual_range 0.24, 0.43;
String long_name "Lu";
String units "ppm (ug/g)";
}
Th232 {
Float32 actual_range 4.15, 5.43;
String long_name "Th232";
String units "ppm (ug/g)";
}
NOTES {
String long_name "Notes";
String units "unitless";
}
}
NC_GLOBAL {
String cdm_data_type "Other";
String Conventions "COARDS, CF-1.6, ACDD-1.3";
String creator_email "info@bco-dmo.org";
String creator_name "BCO-DMO";
String creator_url "https://www.bco-dmo.org/";
String doi "10.26008/1912/bco-dmo.925359.1";
Float64 Easternmost_Easting -145.0954;
Float64 geospatial_lat_max 60.4324;
Float64 geospatial_lat_min 59.42144;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -145.0954;
Float64 geospatial_lon_min -146.3493;
String geospatial_lon_units "degrees_east";
String history
"2024-11-21T08:41:13Z (local files)
2024-11-21T08:41:13Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_925359_v1.html";
String infoUrl "https://www.bco-dmo.org/dataset/925359";
String institution "BCO-DMO";
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 60.4324;
String sourceUrl "(local files)";
Float64 Southernmost_Northing 59.42144;
String summary "Concentrations of the rare earth elements (REE) and Thorium-232 (232Th) are presented for filtered air (dust) samples collected from the northern Gulf of Alaska region, including from Middleton Island (AK)(59.4214 N, 146.3493 W) and the Copper River delta (60.4324 N, 145.0954 W). Size-fractionated samples were collected in November 2019, using a Tisch Volumetric Flow Controlled (VFC) high volume sampler (Tisch Environmental, TE-5170V- BL) outfitted with a Cascade impactor. The six size fractions collected ranged from <0.49 micrometers (um) to >7.2 um in diameter. This sampler technology is discussed in greater detail in Morton et al, 2013. Samples were filtered with acid-washed Whatman 41 (W41) cellulose fiber filters. Additional bulk dust samples were collected in October 2012, using a Thermo Partisol Plus 2025 using Teflon filters. Samples were fully digested using concentrated nitric and hydrofluoric acids, following the approach of Morton et al, 2013. Samples were analyzed using a Thermofisher iCAP inductively coupled plasma mass spectrometer (ICP-MS) in KED mode, with He as a collision cell gas, adapted from the approach of Trommetter et al (2020). Concentrations were determined from standard curves using a REE ICP-MS standard from High-Purity Standards (that also contained 232Th). Three internal standards (Ge, In, and Bi) were added to both samples and standards, to correct for short-term variability in the instrument response and to evaluate stability of mass response during the ICP-MS run. Concentration estimates for the REE and 232Th were blank-corrected using full-process blanks that included filters deployed during times when there was no known dust deposition. Most of the full-process blank concentrations were 100 times or more smaller than the concentrations of our lowest standard (with the exception of Ce, the concentration of which was ~seven times smaller than our lowest standard. This means that our blank concentrations were very low but also not quantified extremely accurately. Our best estimates are that the full-process blanks, including filters, ranged from 0.02 picograms per square centimeter (pg cm-2) for Eu, Tb, and Ho, to 2 pg cm-2 for Ce. These blank concentrations were in all cases 40 times or more smaller than our lowest REE sample concentration for the <0.49 um size fraction with the smallest amount of dust, and ~3 orders of magnitude smaller than the signal of the largest samples. The REE data are also presented in a double-normalized format that first normalizes to concentrations of Post Archean Australian Shale and then normalizes to the mean REE concentration. The normalization approach is slightly modified from that of Serno et al, 2014.";
String title "[Aerosol REE and Th-232 data from northern Gulf of Alaska region] - Concentrations of the rare earth elements (REE) and Thorium-232 (232Th) from the northern Gulf of Alaska region (Inferring trace element inputs to North Pacific surface waters from Alaskan and Asian dust)";
Float64 Westernmost_Easting -146.3493;
}
}
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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.