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Title Sum-
Institution Dataset ID
     data   graph     files  public Compiled dataset consisting of published and unpublished global nitrate d15N measurements
from from 1975-2018
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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 Data Compilation: Nitrate d15N observations were compiled from studies dating
from 1975 to 2018. Whenever possible, the data was acquired via the original
author, but in other cases the data was estimated from the publication
directly. All observations were treated equally, although the failure to
remove nitrite when using the \"denitrifier method\" may bias the nitrate d15N
to low values (Rafter et al., 2013).

For complete methodology, refer to Rafter et al. (2019).
attribute NC_GLOBAL awards_0_award_nid String 766422
attribute NC_GLOBAL awards_0_award_number String OCE-1658392
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1658392 (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 Dr Simone Metz
attribute NC_GLOBAL awards_0_program_manager_nid String 51479
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Global observed nitrate d15N
PI: Patrick Rafter (UC Irvine)
Co-PIs: Aaron Bagnell (UCSB), Dario Marconi (Princeton), & Timothy DeVries (UCSB)
Version date: 28-May-2019
Version number: 1.0
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 2019-05-28T17:17:32Z
attribute NC_GLOBAL date_modified String 2019-06-17T20:03:18Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.768627.1
attribute NC_GLOBAL Easternmost_Easting double 358.0
attribute NC_GLOBAL geospatial_lat_max double 83.0
attribute NC_GLOBAL geospatial_lat_min double -78.0
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 358.0
attribute NC_GLOBAL geospatial_lon_min double -206.0
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 6002.0
attribute NC_GLOBAL geospatial_vertical_min double 0.0
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/768627 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, chemistry, concentration, data, dataset, depth, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Nitrate, erddap, latitude, longitude, management, mole, mole_concentration_of_nitrate_in_sea_water, n02, nitrate, nitrate_d15N, no3, ocean, oceanography, oceans, office, preliminary, reference, science, sea, seawater, water
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/768627/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/768627 (external link)
attribute NC_GLOBAL Northernmost_Northing double 83.0
attribute NC_GLOBAL param_mapping String {'768627': {'Latitude': 'flag - latitude', 'Depth': 'flag - depth', 'Longitude': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/768627/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of California-Irvine
attribute NC_GLOBAL people_0_affiliation_acronym String UC Irvine
attribute NC_GLOBAL people_0_person_name String Patrick Rafter
attribute NC_GLOBAL people_0_person_nid String 615040
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 University of California-Santa Barbara
attribute NC_GLOBAL people_1_affiliation_acronym String UCSB
attribute NC_GLOBAL people_1_person_name String Aaron Bagnell
attribute NC_GLOBAL people_1_person_nid String 768632
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 University of California-Santa Barbara
attribute NC_GLOBAL people_2_affiliation_acronym String UCSB
attribute NC_GLOBAL people_2_person_name String Timothy DeVries
attribute NC_GLOBAL people_2_person_nid String 766426
attribute NC_GLOBAL people_2_role String Co-Principal Investigator
attribute NC_GLOBAL people_2_role_type String originator
attribute NC_GLOBAL people_3_affiliation String Princeton University
attribute NC_GLOBAL people_3_person_name String Dario Marconi
attribute NC_GLOBAL people_3_person_nid String 768634
attribute NC_GLOBAL people_3_role String Co-Principal Investigator
attribute NC_GLOBAL people_3_role_type String originator
attribute NC_GLOBAL people_4_affiliation String University of California-Irvine
attribute NC_GLOBAL people_4_affiliation_acronym String UC Irvine
attribute NC_GLOBAL people_4_person_name String Patrick Rafter
attribute NC_GLOBAL people_4_person_nid String 615040
attribute NC_GLOBAL people_4_role String Contact
attribute NC_GLOBAL people_4_role_type String related
attribute NC_GLOBAL people_5_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_5_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_5_person_name String Shannon Rauch
attribute NC_GLOBAL people_5_person_nid String 51498
attribute NC_GLOBAL people_5_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_5_role_type String related
attribute NC_GLOBAL project String Fe Cycle Models and Observations
attribute NC_GLOBAL projects_0_acronym String Fe Cycle Models and Observations
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:
Tiny marine organisms called phytoplankton play a critical role in Earth's climate, by absorbing carbon dioxide from the atmosphere. In order to grow, these phytoplankton require nutrients that are dissolved in seawater. One of the rarest and most important of these nutrients is iron. Even though it is a critical life-sustaining nutrient, oceanographers still do not know much about how iron gets into the ocean, or how it is removed from seawater. In the past few years, scientists have made many thousands of measurements of the amount of dissolved iron in seawater, in environments ranging from the deep sea, to the Arctic, to the tropical oceans. They found that the amount of iron in seawater varies dramatically from place to place. Can this data tell us about how iron gets into the ocean, and how it is ultimately removed? Yes. In this project, scientists working on making measurements of iron in seawater will come together with scientists who are working on computer models of iron inputs and removal in the ocean. The goal is to work together to create a program that allows our computer models to "learn" from the data, much like an Artificial Intelligence program. This program will develop a "best estimate" of where and how much iron is coming into the ocean, how long it stays in the ocean, and ultimately how it gets removed. This will lead to a better understanding of how climate change will impact the delivery of iron to the ocean, and how phytoplankton will respond to climate change. With better climate models, society can make more informed decisions about how to respond to climate change. The study will also benefit a future generation of scientists, by training graduate students in a unique collaboration between scientists making seawater measurements, and those using computer models to interpret those measurements. Finally, the project aims to increase the participation of minority and low-income students in STEM (Science, Technology, Engineering, and Mathematics) research, through targeted outreach programs.
Iron (Fe) is an important micronutrient for marine phytoplankton that limits primary productivity over much of the ocean; however, the major fluxes in the marine Fe cycle remain poorly quantified. Ocean models that attempt to synthesize our understanding of Fe biogeochemistry predict widely different Fe inputs to the ocean, and are often unable to capture first-order features of the Fe distribution. The proposed work aims to resolve these problems using data assimilation (inverse) methods to "teach" the widely used Biogeochemical Elemental Cycling (BEC) model how to better represent Fe sources, sinks, and cycling processes. This will be achieved by implementing BEC in the efficient Ocean Circulation Inverse Model and expanding it to simulate the cycling of additional tracers that constrain unique aspects of the Fe cycle, including aluminum, thorium, helium and Fe isotopes. In this framework, the inverse model can rapidly explore alternative representations of Fe-cycling processes, guided by new high-quality observations made possible in large part by the GEOTRACES program. The work will be the most concerted effort to date to synthesize these rich datasets into a realistic and mechanistic model of the marine Fe cycle. In addition, it will lead to a stronger consensus on the magnitude of fluxes in the marine Fe budget, and their relative importance in controlling Fe limitation of marine ecosystems, which are areas of active debate. It will guide future observational efforts, by identifying factors that are still poorly constrained, or regions of the ocean where new data will dramatically reduce remaining uncertainties and allow new robust predictions of Fe cycling under future climate change scenarios to be made, ultimately improving climate change predictions. A broader impact of this work on the scientific community will be the development of a fast, portable, and flexible global model of trace element cycling, designed to allow non-modelers to test hypotheses and visualize the effects of different processes on trace metal distributions. The research will also support the training of graduate students, and outreach to low-income and minority students in local school districts.
attribute NC_GLOBAL projects_0_end_date String 2020-06
attribute NC_GLOBAL projects_0_name String Collaborative research: Combining models and observations to constrain the marine iron cycle
attribute NC_GLOBAL projects_0_project_nid String 766423
attribute NC_GLOBAL projects_0_start_date String 2017-07
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 -78.0
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Nitrate d15N observations were compiled from studies dating from 1975 to 2018. Whenever possible, the data was acquired via the original author, but in other cases the data was estimated from the publication directly. All observations were treated equally, although the failure to remove nitrite when using the \denitrifier method\ may bias the nitrate d15N to low values (Rafter et al., 2013). This version of the dataset (1.0) will be updated as new data are published.
attribute NC_GLOBAL title String Compiled dataset consisting of published and unpublished global nitrate d15N measurements from from 1975-2018
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -206.0
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double -78.0, 83.0
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 in degrees north
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 -206.0, 358.0
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 in degrees East
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 0.0, 6002.0
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 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 nitrate_d15N   float  
attribute nitrate_d15N _FillValue float NaN
attribute nitrate_d15N actual_range float -0.5, 68.7
attribute nitrate_d15N bcodmo_name String dN15_NO3
attribute nitrate_d15N colorBarMaximum double 50.0
attribute nitrate_d15N colorBarMinimum double 0.0
attribute nitrate_d15N description String The N isotopic composition of nitrate
attribute nitrate_d15N long_name String Mole Concentration Of Nitrate In Sea Water
attribute nitrate_d15N units String per mil
variable nitrate   float  
attribute nitrate _FillValue float NaN
attribute nitrate actual_range float -999.0, 50.7
attribute nitrate bcodmo_name String NO3
attribute nitrate colorBarMaximum double 50.0
attribute nitrate colorBarMinimum double 0.0
attribute nitrate description String nitrate
attribute nitrate long_name String Mole Concentration Of Nitrate In Sea Water
attribute nitrate nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/NTRAIGGS/ (external link)
attribute nitrate units String micromoles per kilogram (umol kg-1)
variable reference   String  
attribute reference bcodmo_name String reference_paper
attribute reference description String Reference(s)
attribute reference long_name String Reference
attribute reference units String unitless

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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