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   set  data   graph     files  public Table 2: Suspended particulate matter (SPM) concentrations in lake water    ?     I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_809857

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt
attribute NC_GLOBAL acquisition_description String A detailed description of the methods for determining in situ 210Pb, 210Bi,
and 210Po activities is given by Waples (2020).

A second manuscript describing the use of Pb-210, Bi-210, and Po-210 as
particle tracers in aquatic systems is currently in review for Limnology and
Oceanography (March/2020).

Lake water samples (~ 50 L) for radionuclide analyses were collected from the
slip (43.017835, -87.903521) with a submersible pump from a depth of 2 m on 08
November, 15 November, and 20 November 2018.

Water samples collected by submersible pump were weighed and filtered through
nitrocellulose filters (0.45 um, 293 mm, Millipore) within two hours of sample
collection to separate dissolved and particle-bound nuclide fractions of
210Pb, 210Bi, and 210Po. Yield monitors of 207Bi and 209Po (Eckert & Ziegler
Isotope Products) were then added to both fractions. No lead monitor was
required. Dissolved nuclide fractions (< 0.45 um) of 210Pb, 210Bi, and 210Po
were co-precipitated onto newly formed ferric hydroxide and collected by
filtration. Both particle-bound and dissolved nuclide fractions were then
digested in concentrated nitric acid. Bismuth and polonium were completely
separated from lead on EmporeTM anion solid phase extraction (SPE) disks (3M,
47 mm, product number 2252, now manufactured by CDS Analytical). Eluate from
the particle-bound fraction was re-spiked with 207Bi and set aside for ~one
month for the determination of particle-bound 210Pb (via 210Bi in secular
equilibrium with its parent). Anion SPE disks were then counted\u2013 first
for 210Bi via b-decay on a low background gas-flow proportional detector with
anticoincidence circuitry (G542 System, Gamma Products), then for 207Bi via
g-emission to determine yield. Polonium was then removed from the SPE disks,
plated to copper, and a-counted for 210Po and the yield monitor 209Po. Total
210Pb was determined in a separate water sample via 210Bi that had grown into
secular equilibrium with its parent. Activity calculations including
uncertainty propagation and decay corrections are all fully described by
Waples (2020).

Lake water samples (~ 50 L) for radionuclide analyses were collected from the
slip (43.017835, -87.903521) with a submersible pump from a depth of 2 m on 08
November, 15 November, and 20 November 2018.

Software used:
- Maestro software (v. 6.04 and 6.06, Advanced Measurement Technology)
- SigmaPlot (v. 11, Systat Software)
- Excel (v. 2002, Microsoft)
attribute NC_GLOBAL awards_0_award_nid String 806356
attribute NC_GLOBAL awards_0_award_number String OCE-1639865
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1639865 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Henrietta N Edmonds
attribute NC_GLOBAL awards_0_program_manager_nid String 51517
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Table 2. Suspended particulate matter (SPM) concentrations in lake water
Lake Michigan, Nov. 2018
PI: J. Waples (UW-Milwaukee)
version date: 2020-04-22
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_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL dataset_current_state String Final and no updates
attribute NC_GLOBAL date_created String 2020-04-22T20:49:57Z
attribute NC_GLOBAL date_modified String 2020-05-20T12:28:18Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.809857.1
attribute NC_GLOBAL Easternmost_Easting double -87.903521
attribute NC_GLOBAL geospatial_lat_max double 43.017835
attribute NC_GLOBAL geospatial_lat_min double 43.017835
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -87.903521
attribute NC_GLOBAL geospatial_lon_min double -87.903521
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 2.0
attribute NC_GLOBAL geospatial_vertical_min double 2.0
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/809857 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, data, dataset, date, depth, dmo, erddap, iso, ISO_DateTime_UTC, latitude, local, longitude, management, oceanography, office, preliminary, sample, spm, SPM_b, time
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/809857/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/809857 (external link)
attribute NC_GLOBAL Northernmost_Northing double 43.017835
attribute NC_GLOBAL param_mapping String {'809857': {'latitude': 'flag - latitude', 'depth': 'flag - depth', 'longitude': 'flag - longitude', 'ISO_DateTime_UTC': 'flag - time'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/809857/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Wisconsin
attribute NC_GLOBAL people_0_affiliation_acronym String UW-Milwaukee
attribute NC_GLOBAL people_0_person_name String James T. Waples
attribute NC_GLOBAL people_0_person_nid String 806359
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Nancy Copley
attribute NC_GLOBAL people_1_person_nid String 50396
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String Bi 210 measurement
attribute NC_GLOBAL projects_0_acronym String Bi 210 measurement
attribute NC_GLOBAL projects_0_description String Naturally occurring radioactive nuclides provide invaluable "clocks" with which to investigate a wide range of processes in earth and environmental sciences. Nuclides with shorter half-lives are well suited to studying rapid processes, but are often present at very low concentrations and are particularly difficult to measure. The goal of this Early Concept Grant for Exploratory Research (EAGER) is to develop and demonstrate a new analytical method for measuring bismuth-210 (half life, 5 days) in lake water, seawater, and associated particles. Because bismuth tends to become associated with particles more than its parent isotope lead-210 (half life, 22 years), the bismuth-210/lead-210 daughter/parent pair can potentially be used to investigate very short time-scale processes associated with particle (sediment) formation and cycling in lakes and the coastal ocean. Knowledge about such processes is important to understanding carbon and nutrient cycling in these productive and dynamic areas.
The specific goals of this exploratory project are to 1) demonstrate an improved method for measuring the lead-210/bismuth-210/polonium-210 trio in aquatic system samples; 2) measure lead-210/bismuth-210/polonium-210 in Lake Michigan; and 3) explore the feasibility of using bismuth-210/lead-210 disequilibrium as a proxy for particle flux. The project would support an undergraduate student researcher for the summer.
attribute NC_GLOBAL projects_0_end_date String 2019-06
attribute NC_GLOBAL projects_0_geolocation String Lake Michigan 43.0 N 87.9 W
attribute NC_GLOBAL projects_0_name String The measurement and use of bismuth-210 as a tracer of particle flux in aquatic systems
attribute NC_GLOBAL projects_0_project_nid String 806357
attribute NC_GLOBAL projects_0_start_date String 2016-07
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 43.017835
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String latitude,longitude,depth
attribute NC_GLOBAL summary String Table 2. Suspended particulate matter (SPM) concentrations in lake water, Lake Michigan, Nov. 2018
attribute NC_GLOBAL time_coverage_end String 2018-11-20T16:09:00Z
attribute NC_GLOBAL time_coverage_start String 2018-11-08T15:43:00Z
attribute NC_GLOBAL title String Table 2: Suspended particulate matter (SPM) concentrations in lake water
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -87.903521
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5
variable sample   String  
attribute sample bcodmo_name String sample
attribute sample description String sample identifier
attribute sample long_name String Sample
attribute sample nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute sample units String unitless
variable ISO_DateTime_Local   String  
attribute ISO_DateTime_Local bcodmo_name String ISO_DateTime_Local
attribute ISO_DateTime_Local description String sample collection local date and time; ISO formatted yyyy-mm-ddTHH:MM:SS (UTC- 6 hr)
attribute ISO_DateTime_Local long_name String ISO Date Time Local
attribute ISO_DateTime_Local source_name String ISO_DateTime_Local
attribute ISO_DateTime_Local time_precision String 1970-01-01T00:00Z
attribute ISO_DateTime_Local units String unitless
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.54169178E9, 1.54273014E9
attribute time axis String T
attribute time bcodmo_name String ISO_DateTime_UTC
attribute time description String sample collection date and time; ISO formatted yyyy-mm-ddTHH:MM:SSZ (converted to UTC from local: UTC- 6 hr)
attribute time ioos_category String Time
attribute time long_name String ISO Date Time UTC
attribute time nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00:00Z
attribute time units String seconds since 1970-01-01T00:00:00Z
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 43.017835, 43.017835
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String latitude; north is positive
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -87.903521, -87.903521
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String longitude; east is positive
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 2.0, 2.0
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth description String sample depth
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable SPM_b   float  
attribute SPM_b _FillValue float NaN
attribute SPM_b actual_range float 0.64, 3.62
attribute SPM_b bcodmo_name String SPM
attribute SPM_b description String suspended particulate matter (>0.45 microns)
attribute SPM_b long_name String SPM B
attribute SPM_b units String grams/meter^3 (g m-3)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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