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..
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