BCO-DMO ERDDAP
Accessing BCO-DMO data 		log in    
Brought to you by BCO-DMO    
 
 
Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.925359.1
attribute NC_GLOBAL Easternmost_Easting double -145.0954
attribute NC_GLOBAL geospatial_lat_max double 60.4324
attribute NC_GLOBAL geospatial_lat_min double 59.42144
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -145.0954
attribute NC_GLOBAL geospatial_lon_min double -146.3493
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/925359 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended\nfor legal use, since it may contain inaccuracies. Neither the data\nContributor, ERD, NOAA, nor the United States Government, nor any\nof their employees or contractors, makes any warranty, express or\nimplied, including warranties of merchantability and fitness for a\nparticular purpose, or assumes any legal liability for the accuracy,\ncompleteness, or usefulness, of this information.
attribute NC_GLOBAL Northernmost_Northing double 60.4324
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 59.42144
attribute NC_GLOBAL summary String 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.
attribute NC_GLOBAL title String [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)
attribute NC_GLOBAL Westernmost_Easting double -146.3493
variable sample_description String
attribute sample_description long_name String Sample_description
attribute sample_description units String unitless
variable location_description String
attribute location_description long_name String Location_description
attribute location_description units String unitless
variable latitude float
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range float 59.42144, 60.4324
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude float
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -146.3493, -145.0954
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable ISO_Date_UTC String
attribute ISO_Date_UTC long_name String Iso_date_utc
attribute ISO_Date_UTC units String unitless
variable La float
attribute La actual_range float 16.14, 38.2
attribute La long_name String La
attribute La units String ppm (ug/g)
variable Ce float
attribute Ce actual_range float 32.74, 79.6
attribute Ce long_name String Ce
attribute Ce units String ppm (ug/g)
variable Pr float
attribute Pr actual_range float 3.91, 8.83
attribute Pr long_name String Pr
attribute Pr units String ppm (ug/g)
variable Nd float
attribute Nd actual_range float 15.95, 33.9
attribute Nd long_name String Nd
attribute Nd units String ppm (ug/g)
variable Sm float
attribute Sm actual_range float 3.49, 5.55
attribute Sm long_name String Sm
attribute Sm units String ppm (ug/g)
variable Eu float
attribute Eu actual_range float 0.89, 1.22
attribute Eu long_name String Eu
attribute Eu units String ppm (ug/g)
variable Gd float
attribute Gd actual_range float 3.36, 4.66
attribute Gd long_name String Gd
attribute Gd units String ppm (ug/g)
variable Tb float
attribute Tb actual_range float 0.51, 0.77
attribute Tb long_name String Tb
attribute Tb units String ppm (ug/g)
variable Dy float
attribute Dy actual_range float 3.04, 4.68
attribute Dy long_name String Dy
attribute Dy units String ppm (ug/g)
variable Ho float
attribute Ho actual_range float 0.6, 0.99
attribute Ho long_name String Ho
attribute Ho units String ppm (ug/g)
variable Er float
attribute Er actual_range float 1.78, 2.85
attribute Er long_name String Er
attribute Er units String ppm (ug/g)
variable Tm float
attribute Tm actual_range float 0.25, 0.41
attribute Tm long_name String Tm
attribute Tm units String ppm (ug/g)
variable Yb float
attribute Yb actual_range float 1.58, 2.82
attribute Yb long_name String Yb
attribute Yb units String ppm (ug/g)
variable Lu float
attribute Lu actual_range float 0.24, 0.43
attribute Lu long_name String Lu
attribute Lu units String ppm (ug/g)
variable Th232 float
attribute Th232 actual_range float 4.15, 5.43
attribute Th232 long_name String Th232
attribute Th232 units String ppm (ug/g)
variable NOTES String
attribute NOTES long_name String Notes
attribute NOTES units String unitless

 
ERDDAP, Version 2.22
Disclaimers | Privacy Policy | Contact