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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)

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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.

Dataset Citation

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].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0231437

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Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) 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).
Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2017-08-28 to 2017-09-09
Spatial Bounding Box Coordinates	West: -175.3 East: -157.1 South: 62 North: 73.6
Spatial Coverage Map

General Documentation	NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. Descriptive Information Navigate directly to the URL for a descriptive web page with download links.
Associated Resources	Distributed Biological Observatory - Northern Chukchi Integrated Study https://www2.whoi.edu/site/dboncis/ Source DBO-NCIS data at WHOI Distributed Biological Observatory – Northern Chukchi Integrated Study: Healy 1702 Cruise Report https://www.pmel.noaa.gov/foci/operations/2017/HLY1702_cruise_report.pdf related document

Publication Dates	publication: 2021-05-03
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	Submission Package ID: T82P2G
Purpose	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.
Use Limitations	accessLevel: Public 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.

Dataset Citation	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].
Cited Authors	Mordy, Calvin W. Stabeno, Phyllis J. NOAA Pacific Marine Environmental Laboratory
Principal Investigators	Calvin Mordy University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) Phyllis J. Stabeno US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Collaborators	Margaret E. Sullivan University of Washington Joint Institute for the Study of the Atmosphere and Ocean (JISAO) Shaun Bell University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES)
Contributors	US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Resource Providers	Margaret E. Sullivan US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL) US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory (PMEL)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Related Funding Agency: US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory

Theme keywords	NODC DATA TYPES THESAURUS AMMONIUM (NH4) CHLOROPHYLL A CONCENTRATION DISSOLVED OXYGEN NITRATE NITRITE PHAEOPIGMENT CONCENTRATION phosphate silicate NODC OBSERVATION TYPES THESAURUS biological chemical in situ laboratory analyses WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords 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 Provider variables dissolved inorganic nitrogen
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; OAR; Pacific Marine Environmental Laboratory Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce
Platform keywords	NODC PLATFORM NAMES THESAURUS USCGC Healy Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes HEALY (call sign: NEPP, ICES code: 33HQ, 1999)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS CTD laboratory analysis Niskin bottle Global Change Master Directory (GCMD) Instrument Keywords CTD > Conductivity, Temperature, Depth NISKIN BOTTLES
Place keywords	NODC SEA AREA NAMES THESAURUS Arctic Ocean Bering Sea Chukchi Sea Global Change Master Directory (GCMD) Location Keywords OCEAN > ARCTIC OCEAN OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA
Project keywords	NODC PROJECT NAMES THESAURUS Ecosystems and Fisheries-Oceanography Coordinated Investigations (EcoFOCI) Provider Projects Distributed Biological Observatory Northern Chukchi Integrated Study (DBO-NCIS) University of Washington, Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES)
Keywords	NCEI ACCESSION NUMBER 0231437

Use Constraints	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].
Access Constraints	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.
Fees	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.

Lineage information for: dataset
Processing Steps	2021-05-03T12:46:18Z - NCEI Accession 0231437 v1.1 was published.
Output Datasets	NCEI Accession 0231437 v1.1 NCEI Accession 0231437 v1.1 (download) published 2021-05-03T12:46:18Z

Lineage information for: dataset
Processing Steps	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..

Lineage information for: dataset

Processing Steps

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..

Acquisition Information (collection)
Instrument	CTD laboratory analysis Niskin bottle
Platform	USCGC Healy

Last Modified: 2024-06-10T13:17:28Z
For questions about the information on this page, please email: ncei.info@noaa.gov

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)

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