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Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible | Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID |
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data | graph | files | public | [cal_iso] - Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium (EAGER: Collaborative Research: Detection limit in marine nitrogen fixation measurements - Constraints of rates from the mesopelagic ocean) | I M | background | BCO-DMO | bcodmo_dataset_778000 |
Row Type | Variable Name | Attribute Name | Data Type | Value |
---|---|---|---|---|
attribute | NC_GLOBAL | access_formats | String | .htmlTable,.csv,.json,.mat,.nc,.tsv |
attribute | NC_GLOBAL | acquisition_description | String | A serial dilution of 98-99% 15N2 gas stock (Cambridge Isotope Laboratories, Lot #I-21065) in air and helium returned the expected signal (i.e., a slope not significantly different than unity) on a continuous flow Delta V Advantage Plus IRMS (Smith et al. 2015), demonstrating the accuracy of the IRMS over a wide range of 15N2 abundances. |
attribute | NC_GLOBAL | awards_0_award_nid | String | 772538 |
attribute | NC_GLOBAL | awards_0_award_number | String | OCE-1732246 |
attribute | NC_GLOBAL | awards_0_data_url | String | http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1732246 |
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 | Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium PI: Julie Granger Version: 2019-09-30 |
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/ |
attribute | NC_GLOBAL | data_source | String | extract_data_as_tsv version 2.3 19 Dec 2019 |
attribute | NC_GLOBAL | date_created | String | 2019-09-30T13:13:59Z |
attribute | NC_GLOBAL | date_modified | String | 2019-10-02T18:47:08Z |
attribute | NC_GLOBAL | defaultDataQuery | String | &time<now |
attribute | NC_GLOBAL | doi | String | 10.1575/1912/bco-dmo.778000.1 |
attribute | NC_GLOBAL | infoUrl | String | https://www.bco-dmo.org/dataset/778000 |
attribute | NC_GLOBAL | institution | String | BCO-DMO |
attribute | NC_GLOBAL | instruments_0_acronym | String | IR Mass Spec |
attribute | NC_GLOBAL | instruments_0_dataset_instrument_description | String | continuous flow Delta V Isotope Ratio Mass Spectrometer (Smith et al. 2015), and continuous flow-GV Isoprime IRMS (Charoenpong et al., 2014) |
attribute | NC_GLOBAL | instruments_0_dataset_instrument_nid | String | 778016 |
attribute | NC_GLOBAL | instruments_0_description | String | The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer). |
attribute | NC_GLOBAL | instruments_0_instrument_external_identifier | String | https://vocab.nerc.ac.uk/collection/L05/current/LAB16/ |
attribute | NC_GLOBAL | instruments_0_instrument_name | String | Isotope-ratio Mass Spectrometer |
attribute | NC_GLOBAL | instruments_0_instrument_nid | String | 469 |
attribute | NC_GLOBAL | instruments_0_supplied_name | String | Isotope Ratio Mass Spectrometer |
attribute | NC_GLOBAL | instruments_1_acronym | String | MIMS |
attribute | NC_GLOBAL | instruments_1_dataset_instrument_description | String | Membrane Inlet Mass Spectrometer (Bay Instruments) |
attribute | NC_GLOBAL | instruments_1_dataset_instrument_nid | String | 778015 |
attribute | NC_GLOBAL | instruments_1_description | String | Membrane-introduction mass spectrometry (MIMS) is a method of introducing analytes into the mass spectrometer's vacuum chamber via a semipermeable membrane. |
attribute | NC_GLOBAL | instruments_1_instrument_name | String | Membrane Inlet Mass Spectrometer |
attribute | NC_GLOBAL | instruments_1_instrument_nid | String | 661606 |
attribute | NC_GLOBAL | instruments_1_supplied_name | String | Membrane Inlet Mass Spectrometer |
attribute | NC_GLOBAL | keywords | String | bco, bco-dmo, biological, chemical, comment, data, dataset, dmo, erddap, expected, management, measured, oceanography, office, preliminary |
attribute | NC_GLOBAL | license | String | https://www.bco-dmo.org/dataset/778000/license |
attribute | NC_GLOBAL | metadata_source | String | https://www.bco-dmo.org/api/dataset/778000 |
attribute | NC_GLOBAL | param_mapping | String | {'778000': {}} |
attribute | NC_GLOBAL | parameter_source | String | https://www.bco-dmo.org/mapserver/dataset/778000/parameters |
attribute | NC_GLOBAL | people_0_affiliation | String | University of Connecticut |
attribute | NC_GLOBAL | people_0_affiliation_acronym | String | UConn |
attribute | NC_GLOBAL | people_0_person_name | String | Julie Granger |
attribute | NC_GLOBAL | people_0_person_nid | String | 528937 |
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 Massachusetts Dartmouth |
attribute | NC_GLOBAL | people_1_affiliation_acronym | String | UMass Dartmouth |
attribute | NC_GLOBAL | people_1_person_name | String | Annie Bourbonnais |
attribute | NC_GLOBAL | people_1_person_nid | String | 778011 |
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 Hawaii |
attribute | NC_GLOBAL | people_2_person_name | String | Samuel Wilson |
attribute | NC_GLOBAL | people_2_person_nid | String | 51733 |
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 | Woods Hole Oceanographic Institution |
attribute | NC_GLOBAL | people_3_affiliation_acronym | String | WHOI BCO-DMO |
attribute | NC_GLOBAL | people_3_person_name | String | Mathew Biddle |
attribute | NC_GLOBAL | people_3_person_nid | String | 708682 |
attribute | NC_GLOBAL | people_3_role | String | BCO-DMO Data Manager |
attribute | NC_GLOBAL | people_3_role_type | String | related |
attribute | NC_GLOBAL | project | String | EAGER NitFix |
attribute | NC_GLOBAL | projects_0_acronym | String | EAGER NitFix |
attribute | NC_GLOBAL | projects_0_description | String | NSF Award Abstract: The availability of nitrogen is required to support the growth and production of organisms living in the surface of our global ocean. This element can be scarce. To alleviate this scarcity, a special class of bacteria and archaea, called nitrogen fixers, can derive the nitrogen needed for growth from nitrogen gas. This project would carefully examine one specific method for measuring nitrogen fixation that has been used recently to suggest the occurrence of small amounts of nitrogen fixation in subsurface ocean waters. If these reports are verified, then a revision of our understanding of the marine nitrogen cycle may be needed. The Ocean Carbon and Biogeochemistry program will be used as a platform to develop community consensus for best practices in nitrogen fixation measurements and detection of diversity, activity, and abundances of the organisms responsible. In addition, a session will be organized in a future national/international conference to communicate with the broader scientific community while developing these best practices. The goal of this study is to conduct a thorough examination of potential experimental and analytical errors inherent to the 15N2-tracer nitrogen fixation method, in tandem with comprehensive molecular measurements, in mesopelagic ocean waters. Samples will be collected and experimental work conducted on a cruise transect in the North Atlantic Ocean, followed by analytical work in the laboratory. The specific aims of this study are to (1) determine the minimum quantifiable rates of 15N2 fixation based on incubations of mesopelagic waters via characterization of sources of experimental and analytical error, and (2) seek evidence of presence and expression of nitrogen fixation genes via comprehensive molecular approaches on corresponding samples. The range of detectable rates and diazotroph activity from the measurements made in this study will be informative for the understanding of the importance of nitrogen fixation in the oceanic nitrogen budget. |
attribute | NC_GLOBAL | projects_0_end_date | String | 2018-10 |
attribute | NC_GLOBAL | projects_0_geolocation | String | North Atlantic Ocean, Pacific Ocean |
attribute | NC_GLOBAL | projects_0_name | String | EAGER: Collaborative Research: Detection limit in marine nitrogen fixation measurements - Constraints of rates from the mesopelagic ocean |
attribute | NC_GLOBAL | projects_0_project_nid | String | 772534 |
attribute | NC_GLOBAL | projects_0_start_date | String | 2017-05 |
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 | standard_name_vocabulary | String | CF Standard Name Table v55 |
attribute | NC_GLOBAL | summary | String | In order to verify that measurements of the 15N2 atom% of dissolved N2 gas samples effectuated by Membrane Inlet Mass Spectrometry are accurate, we compared these to corresponding measurements of parallel samples on a Delta V Isotope Ratio Mass Spectrometer (IRMS). To this end, we first ensured that the IRMS returns accurate 15N2 atom% values, by measuring the 15N2 atom% of a serial dilutions of a 15N2 gas stock in air and helium. This calibration is documented herein, showing that IRMS measurements in the experimental range were accurate, as expected |
attribute | NC_GLOBAL | title | String | [cal_iso] - Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium (EAGER: Collaborative Research: Detection limit in marine nitrogen fixation measurements - Constraints of rates from the mesopelagic ocean) |
attribute | NC_GLOBAL | version | String | 1 |
attribute | NC_GLOBAL | xml_source | String | osprey2erddap.update_xml() v1.3 |
variable | comment | String | ||
attribute | comment | bcodmo_name | String | comment |
attribute | comment | description | String | sample type |
attribute | comment | long_name | String | Comment |
attribute | comment | units | String | unitless |
variable | expected | float | ||
attribute | expected | _FillValue | float | NaN |
attribute | expected | actual_range | float | 0.00134689, 10.0 |
attribute | expected | bcodmo_name | String | unknown |
attribute | expected | description | String | Expceted 15N2 air He dil (m/z 30/28 ratio x 100) |
attribute | expected | long_name | String | Expected |
attribute | expected | units | String | unitless |
variable | measured | float | ||
attribute | measured | _FillValue | float | NaN |
attribute | measured | actual_range | float | 0.00329868, 10.1 |
attribute | measured | bcodmo_name | String | unknown |
attribute | measured | description | String | measured m/z 30/28 ratio x 100 on GC-IRMS |
attribute | measured | long_name | String | Measured |
attribute | measured | 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.