gov.noaa.nodc:0231437 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-06-12T17:03:00Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Nutrient, chlorophyll, oxygen, and others taken by CTD water samples from the USCGC Healy, cruise HE1702, in the Bering and Chukchi Seas from 2017-08-26 to 2017-09-15 (NCEI Accession 0231437) 2021-05-03 publication 2021-04-26 creation International DOI Foundation (IDF) 10.25921/s1z2-gt63 NOAA National Centers for Environmental Information gov.noaa.nodc:0231437 NCEI Archive Management System 0231437 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Margaret E. Sullivan University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) peggy.sullivan@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information resourceProvider NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information resourceProvider Margaret Sullivan University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) peggy.sullivan@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) website Institution web page information collaborator Calvin Mordy University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) calvin.w.mordy@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information principalInvestigator Phyllis Stabeno NOAA Pacific Marine Environmental Laboratory (PMEL) phyllis.stabeno@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information principalInvestigator shaun bell University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) shaun.bell@noaa.gov https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information collaborator Mordy, Calvin W. University of Washington, CICOES https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information author Stabeno, Phyllis J. NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information contributor tableDigital This dataset contains nutrient, chlorophyll, oxygen, and others taken by CTD water samples from the USCGC Healy, cruise HE1702, in the Bering and Chukchi Seas, and the Arctic Ocean. Discrete water samples from 141 CTD casts were collected in the Chukchi Sea from US Coast Guard Cutter Healy (HE1702, August 26 to September 15, 2017) as part of the 2017 Distributed Biological Observatory – Northern Chukchi Integrated Study (DBO-NCIS). The goal of DBO-NCIS was to document and understand ongoing changes to the Pacific-Arctic ecosystem in light of the changing physical drivers. Sampling and transects on this research cruise were along standard DBO lines in areas 1, 3, 4 and 5. Nutrients and chlorophyll samples were collected at all process stations in support of benthic studies and net tows. A total of 410 nutrient samples were collected, filtered, and stored frozen at -80 degrees C. They were processed post-cruise at the Pacific Marine Environmental Laboratory (PMEL) for determination of nitrate, nitrite, ammonium, silicate and phosphate concentrations. Total chlorophyll was collected at 71 stations at standard depths of surface, 10 m, 20 m, 30 m, 40 m, and 50 m or bottom depth when stations were shallower than any standard depth. Samples were filtered through GF/F glass fiber filters under low vacuum, and the filters were stored frozen at -80 degrees C. Samples were analyzed at NOAA/PMEL. For calibration of the CTD oxygen probe, 48 samples were samples collected for dissolved oxygen. See data type descriptions for more processing details. Data have been submitted in csv format with a 1-line header defining columns. Related profile data from CTD instruments were processed and are available at WHOI. Data were collected as part of the 2017 Distributed Biological Observatory – Northern Chukchi Integrated Study (DBO-NCIS). The goal of DBO-NCIS was to document and understand ongoing changes to the Pacific-Arctic ecosystem in light of the changing physical drivers. The main objectives for the 2017 cruise were (1) to occupy DBO lines 3-5 in the Chukchi Sea with an extensive suite of water column and benthic measurements; and (2) to carry out a process study of the northeastern Chukchi shelf designed to understand the physical-biological links that result in the biological hot spots in this region. Funding Agency: NOAA Pacific Marine Environmental Laboratory completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0231437 Preview graphic PNG 0231437 NCEI ACCESSION NUMBER 2021-04-21 publication AMMONIUM (NH4) CHLOROPHYLL A CONCENTRATION DISSOLVED OXYGEN NITRATE NITRITE PHAEOPIGMENT CONCENTRATION phosphate silicate theme NODC DATA TYPES THESAURUS CTD laboratory analysis Niskin bottle instrument NODC INSTRUMENT TYPES THESAURUS biological chemical in situ laboratory analyses theme NODC OBSERVATION TYPES THESAURUS USCGC Healy platform NODC PLATFORM NAMES THESAURUS NOAA Pacific Marine Environmental Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Pacific Marine Environmental Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ecosystems & Fisheries-Oceanography Coordinated Investigations (EcoFOCI) project NODC PROJECT NAMES THESAURUS Arctic Ocean Bering Sea Chukchi Sea place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Distributed Biological Observatory Northern Chukchi Integrated Study (DBO-NCIS) project Provider Projects EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian dissolved inorganic nitrogen theme Provider Variable Names CTD > Conductivity, Temperature, Depth NISKIN BOTTLES instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian HEALY (call sign: NEPP, ICES code: 33HQ, 1999-) platform ICES/SeaDataNet Ship Codes OCEAN > ARCTIC OCEAN OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian T82P2G Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Mordy, Calvin W.; Stabeno, Phyllis J. (2021). Nutrient, chlorophyll, oxygen, and others taken by CTD water samples from the USCGC Healy, cruise HE1702, in the Bering and Chukchi Seas from 2017-08-26 to 2017-09-15 (NCEI Accession 0231437). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/s1z2-gt63. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. Distributed Biological Observatory - Northern Chukchi Integrated Study 2023 publication https://www2.whoi.edu/site/dboncis/ HTTPS https://www2.whoi.edu/site/dboncis/ Source DBO-NCIS data at WHOI information crossReference Distributed Biological Observatory – Northern Chukchi Integrated Study: Healy 1702 Cruise Report 2017 publication https://www.pmel.noaa.gov/foci/operations/2017/HLY1702_cruise_report.pdf HTTPS https://www.pmel.noaa.gov/foci/operations/2017/HLY1702_cruise_report.pdf related document information crossReference eng; USA utf8 environment oceans -175.3 -157.1 62 73.6 2017-08-28 2017-09-09 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Originator data format 2.084 https://doi.org/10.25921/s1z2-gt63 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/231437 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/231437 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0177/0231437/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0231437 v1.1 was published. 2021-05-03T12:46:18Z NCEI Accession 0231437 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0231437/1.1 HTTPS NCEI Accession 0231437 v1.1 published 2021-05-03T12:46:18Z download dataset Parameter or Variable: Dissolved Oxygen Concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water samples to measure dissolved oxygen concentration for oxygen sensor calibration. The samples were fixed with Winkler reagents, and the flare of each oxygen flask was filled with distilled water and sealed. Samples were processed using technique defined by C. Langdon in “Determination of dissolved oxygen in seawater by Winkler titration using the amperometric technique”, an article within the GO-SHIP Repeat Hydrography Manual (Hood, E.M., Sabine, C.L. and Sloyan, B.M. (eds) (2010) The GO-SHIP Repeat Hydrography Manual: a collection of expert reports and guidelines, Version 1. (IOCCP Report 14, ICPO Publication Series134, http://hdl.handle.net/11329/352). Oxygen calibration water samples are contained in this data set. Related oxygen profile data from the research cruise were processed by R. Pickart’s group at WHOI. (data and information https://web.whoi.edu/healy-2017/ctd-survey/ and DBO3 data at doi:10.18739/A29W09033).; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. These data were used to calibrate CTD profile data. Parameter or Variable: CHLOROPHYLL A CONCENTRATION (measured); Units: microgram/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected at similar depths as nutrients towards estimation of total chlorophyll a and phaeopigments. Sample water was filtered through Whatman GF/F filters (nominal pore size 0.7 mm). Filters were stored frozen (-80 C) and shipped back to the lab at PMEL and analyzed with a Turner Designs (Trilogy) benchtop fluorometer using the chlorophyll a acidification module, and following standard methods (acidification technique, Parsons, T.R., Maita, Y., Lalli, C.M., 1984. A Manual of Chemical and Biological Methods for Seawater Analysis. Pergamon Press, Oxford, England p.173.); Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: PHAEOPIGMENT CONCENTRATION (measured); Units: microgram/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected at similar depths as nutrients towards estimation of total chlorophyll a and phaeopigments. Sample water was filtered through Whatman GF/F filters (nominal pore size 0.7 mm). Filters were stored frozen (-80 C) and shipped back to the lab at PMEL and analyzed with a Turner Designs (Trilogy) benchtop fluorometer using the chlorophyll a acidification module, and following standard methods (acidification technique, Parsons, T.R., Maita, Y., Lalli, C.M., 1984. A Manual of Chemical and Biological Methods for Seawater Analysis. Pergamon Press, Oxford, England p.173.); Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: phosphate concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: Silicate concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: nitrate concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: Nitrite concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: Ammonium concentration (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. Parameter or Variable: dissolved inorganic nitrogen (measured); Units: micromole/liter; Observation Category: in situ; Sampling Instrument: Niskin bottle; Sampling and Analyzing Method: Nutrient water samples were collected from Niskin bottles mounted on a CTD rosette. At each CTD location, Niskin bottles were fired at desired depths on the upcast to collect water. Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with Niskin sea water before filling. Some samples were refrigerated for 3-12 hours prior to analysis, and some frozen for later analysis. Nutrient samples were analyzed according to the methods of Gordon, et al with resultant values for nitrate, nitrite, silicate, phosphate, ammonium and dissolved inorganic nitrogen (nitrate + nitrite + ammonium) concentrations. Reference: Gordon, L.I., Jennings, J.C., Jr., Ros, A.A. and Krest, J.M., 1993. A suggested protocol for continuous flow automated analysis of seawater nutrients (Phosphate, nitrate, nitrite and silicic acid) in the WOCE Hydrographic Program and the Joint Global Ocean fluxes Study. WOCE Operations Manual, Part 3.1.3 "WHP Operations and Methods" (WOCE Hydrographic Program Office, Methods Manual 91-1) Bundesamt für Seeschiffahrt und Hydrographie, Postfach 30 12 20, 2000 Hamburg 36 Germany. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.471.1497&rep=rep1&type=pdf; Data Quality Method: Data were visually reviewed for reasonableness and spurious measurements. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian CTD CTD Conductivity-Temperature-Depth probe laboratory analysis laboratory analysis use as an observation type Niskin bottle Niskin bottle Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle? USCGC Healy There are two US platforms named HEALY: - 33HQ is the identifier for the USCGC HEALY (operational 1999 to present) - 32H1 is the identifier for USS HEALY (operational 1943-1958). Updated information confirmed in ICES database by NOAA on 21 Jan 2011. PLEASE NOTE: This platform ID (33HQ) *is* the USCGC HEALY that was launched on November 15, 1997. Updated information confirmed in ICES database by NOAA on 21 Jan 2011. Title: USCGC Pennant: WAGB-20 Flag: United States of America Vessel Type: Icebreaker DOB: Nov 1999 IMO: 9083380 The HEALY's home page URL is http://www.uscg.mil/pacarea/healy.