Identification_Information: Citation: Citation_Information: Originator: Dr. Frank Sansone, University of Hawaii Originator: Dr. Brian Popp, University of Hawaii Publication_Date: Unknown Title: CTD and Water Chemistry data of the Eastern Pacific Redox Experiment of May - June 2000 (NODC Accession 0000833) Series_Information: Series_name: None Issue_Identification: None Publication_Information: Publication_Place: unpublished material Publisher: unpublished material Online_Linkage: https://www.ncei.noaa.gov/archive/accession/0000833 Description: Abstract: The Eastern Pacific Redox Experiment (EPREX) took place 24 May to 28 June 2000 on the R/V Roger Revelle. The first station was at the Hawaii Ocean Time Series "station ALOHA", 60 miles north of Oahu, Hawaii. The remaining five stations were spread along roughly 15N from 150W to 98W, near the Mexican coast. In addition to CTD data, various water chemistry parameters were aquired over multiple casts at each station down to about 2000 meters. Purpose: The goal of EPREX was to determine the relative importance of each mechanism of nitrous oxide production across a range of biogeochemical conditions. Supplemental_Information: NOAASupplemental: Entry_ID: Unknown Sensor_Name: SeaBird Electronics CTD Profiler Sensor_Name: Niskin bottles Sensor_Name: laboratory analysis Source_Name: R/v Roger Revelle Project_Campaign: Eastern Pacific Redox Experiment (EPREX) Originating_Center: University of Hawaii Storage_Medium: Excel, ASCII Online_size: 25.8 megabytes Resource Description: NODC Accession Number 0000833 Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20000524 Beginning_Time: 0500 Ending_Date: 20000628 Ending_Time: 1700 Currentness_Reference: ground conditions Status: Progress: Complete Maintenance_and_Update_Frequency: as needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -158.0 East_Bounding_Coordinate: -98.0 North_Bounding_Coordinate: 22.7 South_Bounding_Coordinate: 15.0 Keywords: Theme: Theme_Keyword_Thesaurus: NCEI Geoportal Filter Theme_Keyword: CoRIS_Metadata Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: CTD Theme_Keyword: water chemistry Theme_Keyword: biogeochemical Theme_Keyword: temperature Theme_Keyword: Salinity Theme_Keyword: ammonium Theme_Keyword: oxygen Theme_Keyword: nitrite Theme_Keyword: nitrate Theme_Keyword: nitrous oxide Theme_Keyword: pH Theme_Keyword: nutrients Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: environment Theme_Keyword: oceans Theme_Keyword: 007 Theme_Keyword: 014 Theme: Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus Theme_Keyword: Numeric Data Sets > Oceanography Theme: Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus Theme_Keyword: EARTH SCIENCE > Oceans > Salinity/Density > Salinity Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > pH Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrate Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nitrite Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Chemistry > Nutrients Theme_Keyword: EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature Place: Place_Keyword_Thesaurus: None Place_Keyword: Hawaii Place_Keyword: Eastern tropical Pacific Place_Keyword: Station ALOHA Place_Keyword: Mexico Place: Place_Keyword_Thesaurus: CoRIS Place Thesaurus Place_Keyword: COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii (21N160W0000) Place_Keyword: OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii > Hawaii (21N160W0000) Place: Place_Keyword_Thesaurus: CoRIS Region Place_Keyword: MHI Access_Constraints: None Use_Constraints: Dataset credit required Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: NOAA/National Oceanographic Data Center Contact_Position: NODC User Services Group Leader Contact_Address: Address_Type: Mailing and physical address Address: SSMC3 Fourth Floor Address: 1315 East West Highway City: Silver Spring State_or_Province: Maryland Postal_Code: 20910-3282 Country: USA Contact_Voice_Telephone: 301-713-3277 Contact_Facsimile_Telephone: 301-713-3302 Contact_Electronic_Mail_Address: services@nodc.noaa.gov Hours_of_Service: 8:00 a.m. to 4:00 p.m. Monday Through Friday Contact_Instructions: Phone/FAX/e-mail Data_Set_Credit: Dr. Frank Sansone Dr. Brian Popp Department of Oceanography School of Ocean Earth Science and Technology University of Hawaii at Manoa National Science Foundation Chemical Oceanography program Native_Data_Set_Environment: MS Excel (2000) Data_Quality_Information: Logical_Consistency_Report: see methodology Completeness_Report: None Lineage: Process_Step: Process_Description: The EPREX consisted of a transect cruise with six stations spanning a range of biogeochemical conditions. At each station we collected water samples at depths ranging from the surface to 2000 meters. Oxygen was measured using Winkler titration (Grasshoff et al., 1983); nitrite was measured using colorimetry (Grasshoff et al., 1983); ammonium was measured using the fluorescence method of Jones (1991); and N2O was measured by headspace equilibration in a gas tight syringe, followed by packed-column gas chromatography using an electron capture detctor (Cohen, 1977). Nutrient samples, including nitrate, nitrite, and ammonium were collected in acid-washed plastic bottles and frozen for later analysis. Additional water samples were collected in glass serum bottles, preserved with mercuric chloride and sealed with gas tight septa for stable isotopic analysis of N2O in the mass spectrometry laboratory at the University of Hawaii. Source_Used_Citation_Abbreviation: Cohen Y., 1977. Shipboard measurements of dissolved nitrous oxide in seawater by electron capture detector. Anal.Chem. 49:1238-1240. Dore J.E., Popp, B.N., Karl, D.M, and Sansone, F.J., 1988. A large source of atmospheric nitrous oxide from subtropical North Pacific surface waters. Nature 396:63-66. Grasshoff K., Ehrhardt M., and Kremling K, 1983. Methods of seawater analysis. Second Revised and Extended Edition. Verlog Chemie: pp. 61-72, 143-150. Jones R.D, 1991. An improved fluorescence method for the determination of nonmolar concentrations of ammonium in natural waters. Limnol. Oceanogr. 36(4) 814-819. Khalil M.A.K. and Rasmussen R.A, 1992. The global source of nitrous oxide. J. Geophys. Res. 97:14651-14660. Ledwell J.R., Watson A.J. and Law C.S., 1988 Mixing of a tracer in the pycnocline. J. Geophys. Res. 103:21499-21529 Process_Date: unknown Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dr. Frank Sansone Contact_Organization: Department of Oceanography School of Ocean Earth Science and Technology University of Hawaii at Manoa Contact_Position: professor Contact_Address: Address_Type: physical and mailing Address: MSB 523 Address: 1000 Pope Road City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: 808-956-8370 Contact_Electronic_Mail_Address: sansone@hawaii.edu Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: NOAA/NESDIS/National Oceanographic Data Center Contact_Person: Data Access Group, User Services Team Contact_Address: Address_Type: mailing and physical Address: SSMC-3 Fourth Floor Address: 1315 East West Highway City: Silver Spring State_or_Province: MD Postal_Code: 20910-3282 Country: USA Contact_Voice_Telephone: 301-713-3277 Contact_Facsimile_Telephone: 301-713-3302 Contact_Electronic_Mail_Address: services@nodc.noaa.gov Hours_of_Service: 8am-5pm, Monday through Friday Resource_Description: Downloadable Data Distribution_Liability: NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA and NODC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Excel and csv Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://accession.nodc.noaa.gov/833 Fees: Prices vary depending on data set, output medium and ordering mechanism. A standard handling charge, with additional costs for special handling, may be added to the basic cost of the data. Ordering_Instructions: Prepayment by check, money order or bank card is required. Orders may be placed via fax, email, regular mail, telephone or via the NNDC Online Store. Metadata_Reference_Information: Metadata_Date: 20210106 Metadata_Review_Date: 20090105 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Mr. Patrick C. Caldwell Contact_Organization: NOAA/NESDIS/NODC/NCDDC Contact_Position: Hawaii/US Pacific Liaison Contact_Address: Address_Type: mailing Address: 1000 Pope Road, MSB 316 Address: Dept. of Oceanography Address: University of Hawaii at Manoa City: Honolulu State_or_Province: Hawaii Postal_Code: 96822 Country: USA Contact_Voice_Telephone: (808)-956-4105 Contact_Facsimile_Telephone: (808) 956-2352 Contact_Electronic_Mail_Address: caldwell@hawaii.edu Hours_of_Service: 8 AM to 5 PM weekdays Contact_Instructions: check services@nodc.noaa.gov if not available Metadata_Standard_Name: FGDC CSDGM Metadata_Standard_Version: FGDC-STD-001-1998 CoRIS: CoRIS_ID: 20090105062619 CoRIS_Children: None CoRIS_Beginning_Date: 20000524 CoRIS_Ending_Date: 20000628 CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/nodc_0000833_fgdc_eprex.html CoRIS_Tracking_ID: 2548