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Title Sum-
Institution Dataset ID
     data   graph     files  public Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer
cruise in the Ross Sea, Southern Ocean from 2017-2018
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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
attribute NC_GLOBAL acquisition_description String Water was collected from varying depths in the photic zone using a CTD.
Samples were collected by gentle filtration under low vacuum through 0.6um
polycarbonate filters. Filters were placed in glassine envelopes and dried at
65\u00b0C for approximately 24h. For analysis, filters were extracted in 0.2N
NaOH for 45 minutes at 95\u00b0C. Samples were placed on ice and neutralized
with 1N HCl to stop the extraction. Concentrations of silicic acid were
determined using the colorimetric method described in Strickland and Parsons,
1972. Precautions were made keep samples contaminant-free, by using
plasticware and MilliQ water.
attribute NC_GLOBAL awards_0_award_nid String 774950
attribute NC_GLOBAL awards_0_award_number String OPP-1644073
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1644073 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Office of Polar Programs (formerly NSF PLR)
attribute NC_GLOBAL awards_0_funding_acronym String NSF OPP
attribute NC_GLOBAL awards_0_funding_source_nid String 713360
attribute NC_GLOBAL awards_0_program_manager String Jennifer Burns
attribute NC_GLOBAL awards_0_program_manager_nid String 50508
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Biogenic silica
PI: Giacomo DiTullio
Data Version 1: 2019-10-30
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 date_created String 2019-10-30T18:15:56Z
attribute NC_GLOBAL date_modified String 2019-11-14T10:25:28Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.780191.1
attribute NC_GLOBAL Easternmost_Easting double 178.1814
attribute NC_GLOBAL geospatial_lat_max double -72.4482
attribute NC_GLOBAL geospatial_lat_min double -78.6294
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 178.1814
attribute NC_GLOBAL geospatial_lon_min double -173.5369
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 1550.0
attribute NC_GLOBAL geospatial_vertical_min double 5.0
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/780191 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String UV Spectrophotometer-Shimadzu
attribute NC_GLOBAL instruments_0_dataset_instrument_description String A Shimadzu UV-1601 spectrophotometer was used to measure the absorbance of silica standards and samples. A set of seven standards were run with each set of samples and the resulting standard curve was used to quantify the concentration of biogenic silica.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 780224
attribute NC_GLOBAL instruments_0_description String The Shimadzu UV Spectrophotometer is manufactured by Shimadzu Scientific Instruments (ssi.shimadzu.com). Shimadzu manufacturers several models of spectrophotometer; refer to dataset for make/model information.
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/LAB20/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String UV Spectrophotometer-Shimadzu
attribute NC_GLOBAL instruments_0_instrument_nid String 595
attribute NC_GLOBAL instruments_0_supplied_name String Shimadzu UV-1601 spectrophotometer
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, bsi, chemical, data, dataset, date, depth, depth2, dmo, erddap, fltr, Fltr_Vol, latitude, longitude, management, niskin, oceanography, office, preliminary, sample, station, time, vol
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/780191/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/780191 (external link)
attribute NC_GLOBAL Northernmost_Northing double -72.4482
attribute NC_GLOBAL param_mapping String {'780191': {'Latitude': 'flag - latitude', 'Depth': 'flag - depth', 'Longitude': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/780191/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String College of Charleston
attribute NC_GLOBAL people_0_affiliation_acronym String CofC
attribute NC_GLOBAL people_0_person_name String Giacomo DiTullio
attribute NC_GLOBAL people_0_person_nid String 50689
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 College of Charleston
attribute NC_GLOBAL people_1_affiliation_acronym String CofC
attribute NC_GLOBAL people_1_person_name String Peter Lee
attribute NC_GLOBAL people_1_person_nid String 516649
attribute NC_GLOBAL people_1_role String Co-Principal Investigator
attribute NC_GLOBAL people_1_role_type String originator
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Karen Soenen
attribute NC_GLOBAL people_2_person_nid String 748773
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL project String CICLOPS
attribute NC_GLOBAL projects_0_acronym String CICLOPS
attribute NC_GLOBAL projects_0_description String NSF abstract:
Phytoplankton blooms in the coastal waters of the Ross Sea, Antarctica are typically dominated by either diatoms or Phaeocystis Antarctica (a flagellated algae that often can form large colonies in a gelatinous matrix). The project seeks to determine if an association of bacterial populations with Phaeocystis antarctica colonies can directly supply Phaeocystis with Vitamin B12, which can be an important co-limiting micronutrient in the Ross Sea. The supply of an essential vitamin coupled with the ability to grow at lower iron concentrations may put Phaeocystis at a competitive advantage over diatoms. Because Phaeocystis cells can fix more carbon than diatoms and Phaeocystis are not grazed as efficiently as diatoms, the project will help in refining understanding of carbon dynamics in the region as well as the basis of the food web webs. Such understanding also has the potential to help refine predictive ecological models for the region. The project will conduct public outreach activities and will contribute to undergraduate and graduate research. Engagement of underrepresented students will occur during summer student internships. A collaboration with Italian Antarctic researchers, who have been studying the Terra Nova Bay ecosystem since the 1980s, aims to enhance the project and promote international scientific collaborations.
The study will test whether a mutualistic symbioses between attached bacteria and Phaeocystis provides colonial cells a mechanism for alleviating chronic Vitamin B12 co-limitation effects thereby conferring them with a competitive advantage over diatom communities. The use of drifters in a time series study will provide the opportunity to track in both space and time a developing algal bloom in Terra Nova Bay and to determine community structure and the physiological nutrient status of microbial populations. A combination of flow cytometry, proteomics, metatranscriptomics, radioisotopic and stable isotopic labeling experiments will determine carbon and nutrient uptake rates and the role of bacteria in mitigating potential vitamin B12 and iron limitation. Membrane inlet and proton transfer reaction mass spectrometry will also be used to estimate net community production and release of volatile organic carbon compounds that are climatically active. Understanding how environmental parameters can influence microbial community dynamics in Antarctic coastal waters will advance an understanding of how changes in ocean stratification and chemistry could impact the biogeochemistry and food web dynamics of Southern Ocean ecosystems.
attribute NC_GLOBAL projects_0_end_date String 2020-08
attribute NC_GLOBAL projects_0_geolocation String Amundsen Sea, Ross Sea, Terra Nova Bay
attribute NC_GLOBAL projects_0_name String Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay
attribute NC_GLOBAL projects_0_project_nid String 774945
attribute NC_GLOBAL projects_0_start_date String 2017-09
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 -78.6294
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018
attribute NC_GLOBAL title String Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -173.5369
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Date   String  
attribute Date bcodmo_name String date
attribute Date description String Date in UTC - format: YYY-MM-DD
attribute Date long_name String Date
attribute Date nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute Date source_name String Date
attribute Date time_precision String 1970-01-01
attribute Date units String unitless
variable Station   String  
attribute Station bcodmo_name String station
attribute Station description String Station Identifier - Two sets of samples were labeled “Station 52” but were collected from different CTD casts. To clarify this samples from the second cast at station 52 were labeled 52_CTD 53.
attribute Station long_name String Station
attribute Station units String unitless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -78.6294, -72.4482
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 - South is negative
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 -173.5369, 178.1814
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 - West is negative
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 5.0, 1550.0
attribute depth axis String Z
attribute depth bcodmo_name String depth
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 Niskin   String  
attribute Niskin bcodmo_name String bot_Nis
attribute Niskin description String Niskin Bottle Identifier
attribute Niskin long_name String Niskin
attribute Niskin units String unitless
variable Sample   byte  
attribute Sample _FillValue byte 127
attribute Sample actual_range byte 1, 9
attribute Sample bcodmo_name String sample
attribute Sample description String Sample number
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 Fltr_Vol   float  
attribute Fltr_Vol _FillValue float NaN
attribute Fltr_Vol actual_range float 0.15, 1.06
attribute Fltr_Vol bcodmo_name String vol_filt
attribute Fltr_Vol description String Volume filtered
attribute Fltr_Vol long_name String Fltr Vol
attribute Fltr_Vol units String liter (l)
variable Bsi   float  
attribute Bsi _FillValue float NaN
attribute Bsi actual_range float 0.04, 13.69
attribute Bsi bcodmo_name String Si_bio
attribute Bsi description String Concentration of biogenic silica
attribute Bsi long_name String Bsi
attribute Bsi units String micromole (µM)

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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