Underway Seawater Sampling Aboard NOAA ship Oscar Dyson in 2008, Forage Distribution and Ocean Conditions (B62)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Cokelet, Edward D.
Publication_Date: Unpublished material
Title:
Underway Seawater Sampling Aboard NOAA ship Oscar Dyson in 2008, Forage Distribution and Ocean Conditions (B62)
Geospatial_Data_Presentation_Form: digital
Publication_Information:
Publication_Place: Seattle, WA
Publisher: NOAA/PMEL/EcoFOCI
Description:
Abstract:
One goal of BSIERP (Bering Sea Integrated Ecosystem Research Program) Project 62: Forage Distribution and Ocean Conditions was to measure oceanographic conditions during each NOAA ship Oscar Dyson cruise in the Bering Sea during the 2008-2010 study period. In early 2008, NOAA/PMEL/EcoFOCI scientists redesigned Dyson's underway seawater system. The ocean temperature, salinity and chlorophyll fluorescence instruments were augmented with nitrate and oxygen sensors and meters to monitor the flow rates in water pumped from the bow seawater intake at approximately 2.5 m depth. The bench fluorometer was replaced by a smaller, submersible one that also measured turbidity. These measurements were combined with the ship's position, speed, heading, pitch, roll, heave, short- and long-wave solar radiation, wind speed and direction, air temperature, relative humidity and barometric pressure. Various instruments recorded at different rates; therefore measurements from individual instruments were interpolated to regular, equispaced time axes and combined into one coherent data set. Maps show the temperature (Figures 1a-f), salinity (Figures 2a-f), nitrate concentration (Figures 3a-f), chlorophyll-a concentration (Figures 4a-f), and oxygen saturation (Figures 5a-e) along the ship track.
Purpose:
To measure underway, near-surface oceanographic conditions aboard NOAA ship Oscar Dyson cruises in the Bering Sea, 17 Feb-30 Sep 2008.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20080217
Ending_Date: 20080930
Currentness_Reference: observed
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent: Eastern Bering Sea continental shelf
Bounding_Coordinates:
West_Bounding_Coordinate: 178.00000
East_Bounding_Coordinate: -152.00000
North_Bounding_Coordinate: 62.5
South_Bounding_Coordinate: 51.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Time
Theme_Keyword: Latitude
Theme_Keyword: Longitude
Theme_Keyword: HDOP
Theme_Keyword: SOG
Theme_Keyword: COG
Theme_Keyword: Heading
Theme_Keyword: Pitch
Theme_Keyword: Roll
Theme_Keyword: Heave
Theme_Keyword: Short Wave Solar Radiation
Theme_Keyword: Long Wave Solar Radiation
Theme_Keyword: Wind Speed
Theme_Keyword: Wind Direction
Theme_Keyword: Air Temperature
Theme_Keyword: Humidity
Theme_Keyword: Barometric Pressure
Theme_Keyword: Water Temperature
Theme_Keyword: Salinity
Theme_Keyword: Nitrate
Theme_Keyword: Fluorescence
Theme_Keyword: Chlorophyll
Theme_Keyword: Turbidity
Theme_Keyword: Oxygen
Theme:
Theme_Keyword_Thesaurus: Core Variable Map
Theme_Keyword: Time:T_1MIN_AX
Theme_Keyword: Time:T_2MIN_AX
Theme_Keyword: Latitude:LAT_DGPS
Theme_Keyword: Longitude:LON_DGPS
Theme_Keyword: HDOP:HDOP_DGPS
Theme_Keyword: SOG:SOG_DGPS
Theme_Keyword: COG:COG_DGPS
Theme_Keyword: Heading:HDG_GYRO
Theme_Keyword: Heading:HDG_POSMV
Theme_Keyword: Pitch:PITCH_POSMV
Theme_Keyword: Roll:ROLL_POSMV
Theme_Keyword: Heave:HEAVE_POSMV
Theme_Keyword: Short Wave Solar Radiation:SWR
Theme_Keyword: Long Wave Solar Radiation:LWR
Theme_Keyword: Wind Speed:WIND_SPD_TRUE
Theme_Keyword: Wind Direction:WIND_DIR_TRUE
Theme_Keyword: Air Temperature:TEMP_AIR
Theme_Keyword: Humidity:REL_HUMID
Theme_Keyword: Pressure:PRES
Theme_Keyword: Water Temperature:T_INTAKE
Theme_Keyword: Water Temperature:T_TSG
Theme_Keyword: Salinity:S_TSG
Theme_Keyword: Salinity:SALINITY_CALIB
Theme_Keyword: Nitrate:NO3_ISUS
Theme_Keyword: Nitrate:NITRATE_CALIB
Theme_Keyword: Fluorescence:FL_TURNER
Theme_Keyword: Chlorophyll:CHL_FL_FCTRY
Theme_Keyword: Chlorophyll:CHLOROPHYLL_CALIB
Theme_Keyword: Turbidity:TURBIDITY_FCTRY_CAL
Theme_Keyword: Oxygen:O2_CONC_OPTODE
Theme_Keyword: Oxygen:OXYGEN_CALIB
Theme_Keyword: Oxygen:O2_SAT_OPTODE
Theme_Keyword: Oxygen:O2_SAT_CALIB
Theme:
Theme_Keyword_Thesaurus: Variable Map
Theme_Keyword: T_1MIN_AX:Time:time axis:MINUTES since 2008-01-01 00:00:00
Theme_Keyword: T_2MIN_AX:Time:time axis:MINUTES since 2008-01-01 00:00:00
Theme_Keyword: LAT_GPS:Latitude:GPS Latitude:degrees_north
Theme_Keyword: LON_GPS:Longitude:GPS Longitude:degrees_east
Theme_Keyword: HDOP_DGPS:HDOP:DGPS Horizontal Dilution of Precision:
Theme_Keyword: SOG_DGPS:SOG:Speed Over Ground:m/s
Theme_Keyword: COG_DGPS:COG:Course Over Ground:degrees_true
Theme_Keyword: HDG_GYRO:Heading:Ship Gyro Heading:degrees_true
Theme_Keyword: HDG_POSMV:Heading:Ship POSMV Heading:degrees_true
Theme_Keyword: PITCH_POSMV:Pitch:Pitch from POSMV:degrees
Theme_Keyword: ROLL_POSMV:Roll:Roll from POSMV:degrees
Theme_Keyword: HEAVE_POSMV:Heave:Heave from POSMV:m
Theme_Keyword:
SWR:Short Wave Solar Radiation:Short Wave Downwelling Irradiance:W/m2
Theme_Keyword: LWR:Long Wave Solar Radiation:Long Wave Incoming Radiation:W/m2
Theme_Keyword: WIND_SPD_TRUE:Wind Speed:Wind Speed:m/s
Theme_Keyword: WIND_DIR_TRUE:Wind Direction:Wind Direction:degrees_true
Theme_Keyword: TEMP_AIR:Air Temperature:Air Temperature:deg_C
Theme_Keyword: REL_HUMID:Humidity:Air Relative Humidity:percent
Theme_Keyword: PRES:Pressure:Barometric Pressure:mbar
Theme_Keyword: T_INTAKE:Water Temperature:Seawater Intake Temperature:deg_C
Theme_Keyword: T_TSG::Water Temperature:Thermosalinograph Temperature:deg_C
Theme_Keyword: S_TSG:Salinity:Thermosalinograph Salinity:psu
Theme_Keyword:
SALINITY_CALIB:Salinity:Calibrated Thermosalinograph Salinity:psu
Theme_Keyword: NO3_ISUS:Nitrate:ISUS Nitrate Concentration:mcmol/l
Theme_Keyword:
NITRATE_CALIB:Nitrate:Calibratred ISUS Nitrate Concentration:mcmol/l
Theme_Keyword: FL_TURNER:Fluorescence:Chlorophyll-a Fluorescence:counts
Theme_Keyword: CHL_FL_FCTRY:Chlorophyll:Chlorophyll-a Concentration:mcg/l
Theme_Keyword:
CHLOROPHYLL_CALIB:Chlorophyll:Calibrated Chlorophyll Concentration:mcg/l
Theme_Keyword: TURBIDITY_FCTRY_CAL:Turbidity:Turbidity:NTU
Theme_Keyword: O2_CONC_OPTODE:Oxygen:Oxygen Concentration:mcmol/l
Theme_Keyword: OXYGEN_CALIB:Oxygen:Calibrated Oxygen Concentration:mcmol/l
Theme_Keyword: O2_SAT_OPTODE:Oxygen:Oxygen Saturation:percent
Theme_Keyword: O2_SAT_CALIB:Oxygen:Calibrated Oxygen Saturation:percent
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: project_number:B62
Theme_Keyword: data_url:<http://data.eol.ucar.edu/codiac/dss/id=245.B62-009>
Theme_Keyword: archive_url:<http://www.eol.ucar.edu/projects/bsierp>
Theme:
Theme_Keyword_Thesaurus: Dataset Map
Theme_Keyword: id=xxxxx
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: Bering Sea
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 17 February-30 September 2008
Access_Constraints:
Access is restricted. Data policy: <http://www.eol.ucar.edu/projects/best/program_management_plan.pdf>
Use_Constraints:
Use is restricted. Data policy: <http://www.eol.ucar.edu/projects/best/program_management_plan.pdf>
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1a.gif
Browse_Graphic_File_Description:
Figure 1a: Map of temperature along ship track during Oscar Dyson cruise DY0802
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1b.gif
Browse_Graphic_File_Description:
Figure 1b: Map of temperature along ship track during Oscar Dyson cruise DY0804
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1c.gif
Browse_Graphic_File_Description:
Figure 1c: Map of temperature along ship track during Oscar Dyson cruise DY0806
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1d.gif
Browse_Graphic_File_Description:
Figure 1d: Map of temperature along ship track during Oscar Dyson cruise DY0807
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1e.gif
Browse_Graphic_File_Description:
Figure 1e: Map of temperature along ship track during Oscar Dyson cruise DY0809
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_1f.gif
Browse_Graphic_File_Description:
Figure 1f: Map of temperature along ship track during Oscar Dyson cruise DY0811
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2a.gif
Browse_Graphic_File_Description:
Figure 2a: Map of salinity along ship track during Oscar Dyson cruise DY0802
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2b.gif
Browse_Graphic_File_Description:
Figure 2b: Map of salinity along ship track during Oscar Dyson cruise DY0804
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2c.gif
Browse_Graphic_File_Description:
Figure 2c: Map of salinity along ship track during Oscar Dyson cruise DY0806
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2d.gif
Browse_Graphic_File_Description:
Figure 2d: Map of salinity along ship track during Oscar Dyson cruise DY0807
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2e.gif
Browse_Graphic_File_Description:
Figure 2e: Map of salinity along ship track during Oscar Dyson cruise DY0809
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_2f.gif
Browse_Graphic_File_Description:
Figure 2f: Map of salinity along ship track during Oscar Dyson cruise DY0811
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3a.gif
Browse_Graphic_File_Description:
Figure 3a: Map of nitrate along ship track during Oscar Dyson cruise DY0802
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3b.gif
Browse_Graphic_File_Description:
Figure 3b: Map of nitrate along ship track during Oscar Dyson cruise DY0804
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3c.gif
Browse_Graphic_File_Description:
Figure 3c: Map of nitrate along ship track during Oscar Dyson cruise DY0806
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3d.gif
Browse_Graphic_File_Description:
Figure 3d: Map of nitrate along ship track during Oscar Dyson cruise DY0807
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3e.gif
Browse_Graphic_File_Description:
Figure 3e: Map of nitrate along ship track during Oscar Dyson cruise DY0809
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_3f.gif
Browse_Graphic_File_Description:
Figure 3f: Map of nitrate along ship track during Oscar Dyson cruise DY0811
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4a.gif
Browse_Graphic_File_Description:
Figure 4a: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0802
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4b.gif
Browse_Graphic_File_Description:
Figure 4b: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0804
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4c.gif
Browse_Graphic_File_Description:
Figure 4c: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0806
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4d.gif
Browse_Graphic_File_Description:
Figure 4d: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0807
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4e.gif
Browse_Graphic_File_Description:
Figure 4e: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0809
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_4f.gif
Browse_Graphic_File_Description:
Figure 4f: Map of chlorophyll-a along ship track during Oscar Dyson cruise DY0811
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_5a.gif
Browse_Graphic_File_Description:
Figure 5a: Map of oxygen saturation along ship track during Oscar Dyson cruise DY0804
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_5b.gif
Browse_Graphic_File_Description:
Figure 5b: Map of oxygen saturation along ship track during Oscar Dyson cruise DY0806
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_5c.gif
Browse_Graphic_File_Description:
Figure 5c: Map of oxygen saturation along ship track during Oscar Dyson cruise DY0807
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_5d.gif
Browse_Graphic_File_Description:
Figure 5d: Map of oxygen saturation along ship track during Oscar Dyson cruise DY0809
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_5e.gif
Browse_Graphic_File_Description:
Figure 5e: Map of oxygen saturation along ship track during Oscar Dyson cruise DY0811
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_6.pdf
Browse_Graphic_File_Description:
Figure 6: NOAAS Oscar Dyson underway seawater system instrument layout. In this photo the Turner fluorometer was in use, and the WET Labs fluorometer and Aanderaa oxygen sensor were not yet fully installed.
Browse_Graphic_File_Type: PDF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_7.gif
Browse_Graphic_File_Description:
Figure 7: Salinity calibration fit with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_8a.gif
Browse_Graphic_File_Description:
Figure 8a: Nitrate calibration fit until10 July 2008 with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_8b.gif
Browse_Graphic_File_Description:
Figure 8b: Nitrate calibration fit after 10 July 2008 with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_9a.gif
Browse_Graphic_File_Description:
Figure 9a: Chlorophyll-a calibration until10 July 2008 fit with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure9b.gif
Browse_Graphic_File_Description:
Figure 9b: Chlorophyll-a calibration fit after 10 July 2008 with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_10a.gif
Browse_Graphic_File_Description:
Figure 10a: Oxygen calibration fit until10 July 2008 with discrete sample values on the abscissa and detrended underway instrument values on the ordinate until. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name: Figure_10b.gif
Browse_Graphic_File_Description:
Figure 10b: Oxygen calibration fit after 10 July 2008 with discrete sample values on the abscissa and detrended underway instrument values on the ordinate. The blue-dashed line represents an exact fit, and the green solid line is the linear least-squares fit.
Browse_Graphic_File_Type: GIF
Analytical_Tool:
Analytical_Tool_Description:
The data file is a self-documenting NetCDF file that meets the COARDS NetCDF standards. It was generated by Ferret software.
Tool_Access_Information:
Online_Linkage: <http://www.unidata.ucar.edu/software/netcdf/>
Online_Linkage: <http://ferret.wrc.noaa.gov/Ferret/>
Tool_Access_Instructions:
<http://www.unidata.ucar.edu/software/netcdf/> <http://ferret.wrc.noaa.gov/Ferret/>
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Ship-provided sensors that measured position, attitude, speed and course over ground, short- and long-wave solar radiation, wind speed and direction, air temperature and humidity, and barometric pressure were maintained and calibrated by NOAA’s Marine Operations Center-Pacific according to their own schedule. The ship's heading was measured by a gyrocompass and an Applanix POS MV attitude determination system that also measured pitch, roll and heave. The oceanographic thermometer at the water intake was accurate to 0.001 deg. C with a drift within 0.002 deg. C per year according to the manufacturer; therefore a theoretical accuracy of 0.003 degrees would be predicted. Its output was compared to other sources of seawater temperature (3 hull sensors and the thermosalinograph temperature) to exclude large, spurious deviations. The field accuracy for temperature is probably about 0.01 deg. C. The measured temperature within the thermosalinograph, used to compute salinity, exceeded the seawater intake temperature because the former was mounted in a heated laboratory space. Discrete salinity, nitrate, chlorophyll and oxygen samples were collected on a daily schedule (salinity 1/d, nitrate 1/d, chlorophyll 2/d, oxygen 1/d with occasional replicate samples) and preserved (in stoppered 200-ml Kimax borosilicate bottles for salinity; in acid-cleaned 40 ml HDPE Boston Round sample bottles for nitrate and frozen at -80 C; collected in 60-ml plastic sample bottles, filtered through 0.7 micron glass fiber filters and frozen at -80 C for chlorophyll; or collected in 300-ml BOD bottles and 'pickled' with manganous sulphate and alkaline iodide solutions for oxygen) for later analysis in the laboratory aboard ship or in Seattle. Salinity samples were analyzed with a Guildline Autosal laboratory salinometer with a laboratory accuracy better than 0.0001 psu. Nitrate samples were analyzed using a modified method of Armstrong, Stearns and Strickland (1967, Deep Sea Research 14: 381-38) with a typical laboratory accuracy of 0.5 micromole/l. Chlorophyll samples were analyzed via the acidification method (Lorenzen, 1966, Deep Sea Research 13:223-227) using a Turner Designs AU-10 fluorometer with a typical laboratory accuracy of 10-20%. Oxygen samples were analyzed via the Winkler method (Strickland and Parsons, 1968, A Practical Handbook of Seawater Analysis, p 21-26) with a typical laboratory accuracy of 1 micromole/l. For each instrument with corresponding discrete samples, the instrument and discrete time series were differenced, and the difference trend was assumed to be from instrument drift. The instrument time series was detrended and calibrated against the discrete samples with a linear least-squares fit. Figure 7 shows the fit for salinity for which the correlation coefficient, r-squared, was 0.999 and the standard error was 0.017 psu. The blue-dashed line of slope 1 through the origin represents an exact fit, the green solid line represents the actual fit, and any outliers not included in the fit are designated by red squares. For nitrate, chlorophyll and oxygen, the time series were split into two sessions, before and after 10 July 2018 12:00 when the instrument plumbing was reconfigured and the fluorometers changed. Figures 8a-b show the least-squares fits for nitrate over the early and late time periods with r-squared values of 0.96 and 0.95 and standard errors of 1.63 and 0.68 micromole/l, respectively. Figures 9a-b show the fits for chlorophyll with r-squared = 0.72 and 0.30 and errors of 1.79 and 0.66 microgram/l, respectively. Figures 10a-b show the fits for oxygen with r-squared = 0.72 and 0.96 and errors of 13.3 and 2.0 micromoles/l. The accuracy of the discrete laboratory analyses was greater than that of the field calibrations. Some calibrated values were negative although that is not physically possible, e.g. a negative concentration. They remain negative in the dataset to give another indication of the accuracy of calibrated variables.
Logical_Consistency_Report:
Quality control was carried out, time series were scrutinized and plots of variables along the ship track were checked. The data values are within the expected range for these oceanographic variables.
Completeness_Report:
Data gaps occur between Bering Sea cruises and where values were deleted that did not meet quality criteria.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: GPS positions should be accurate to within 10 m.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Prior to the 2008 field season, David Strausz, Antonio Jenkins and Edward Cokelet of NOAA/PMEL reconfigured the oceanographic instruments on NOAA ship Oscar Dyson and installed nitrate and oxygen sensors and three electronic flow meters as part of BSIERP. On 10 July 2008, they exchanged the ship's existing Turner Designs 10-AU field fluorometer for a WET Labs ECO fluorometer and rerouted some plumbing lines (Figure 6 ). Starting at the bow inlet at nominally 2.5-m depth, the system consisted of: plastic pipe, a Sea-Bird Electronics (SBE) SBE 38 digital oceanographic thermometer (<http://www.seabird.com/products/spec_sheets/38data.htm>) to measure water temperature at the water intake, a coarse strainer, a paddlewheel flow meter, a pump and a spare that could be switched, a U-pipe with air vent to remove air bubbles, two switchable 50-micron filters, a SUNY (State University of New York) vortex debubbler to remove air bubbles from the water before it reached the instruments, and three electromagnetic flow meters to measure the water flow rates to the thermosalinograph (TSG), nitrate sensor and fluorometer/optode instrument loops. The TSG loop had an SBE 45 MicroTSG thermosalinograph (<http://www.seabird.com/products/spec_sheets/45data.htm>) to measure salinity. The nitrate sensor loop had a 1-micron filter followed by a Satlantic ISUS v3 nitrate sensor (<http://www.satlantic.com/isus>) to measure the dissolved nitrate concentration. The chlorophyll-fluorometer/optode loop had a Turner Designs 10-AU field fluorometer (<http://www.turnerdesigns.com/products/laboratory/10au-field-fluorometer>) until 10 July 2008 or a WET Labs ECO FLNTUS fluorometer (<http://www.wetlabs.com/products/eflcombo/fl.htm>) with turbidity sensor and bio-wiper after that. It also had an Aanderaa Optode 3835 oxygen sensor (<http://www.aadi.no/Aanderaa/Products/Sensors/OxygenOptode/default.aspx>) to measure the dissolved oxygen concentration. The flow rates were monitored and the filters cleaned whenever the flows dropped too low. The fluorometer, optode and nitrate sensor were cleaned approximately weekly with cotton-tipped swabs, the latter with oxalic acid solution. Data were recorded on the ship's NOAA SCS (Scientific Computer System) at intervals of 1 second to 5 minutes depending upon the instrument.
Process_Step:
Process_Description:
Dyson's digital position, attitude, speed and course over ground, short- and long-wave solar radiation, wind speed and direction, air temperature and humidity, barometric pressure, underway system flow rates, seawater intake temperature, salinity, nitrate concentration, chlorophyll fluorescence, turbidity, and oxygen concentration were recorded at various rates up to 1 Hz and stored in individual sensor files. Data from each instrument were edited to remove spurious data spikes and extreme values outside ad-hoc thresholds. Also the flow rates through the instrument loops were monitored for low-flow incidents, and those data values flagged as bad. The edited data were linearly interpolated onto a common equi-spaced time axis with 1-minute increments. The nitrate sensor operated at a slower rate. For the first cruise, DY0802, the nitrate concentration was recorded at 6-minute intervals, and for subsequent cruises it was recorded at 2-minute intervals. These measurements were linearly interpolated onto a common equi-spaced time axis with 2-minute increments.
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Edward D. Cokelet
Contact_Organization: NOAA/PMEL
Contact_Address:
Address_Type: mailing
Address: 7600 Sand Point Way NE
City: Seattle
State_or_Province: WA
Postal_Code: 98105
Country: USA
Contact_Voice_Telephone: 206-526-6820
Contact_Electronic_Mail_Address: Edward.D.Cokelet@noaa.gov
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Ship track time series of ship's position, speed, heading, pitch, roll, heave, short- and long-wave solar radiation, wind speed and direction, air temperature, relative humidity and barometric pressure, water temperature, salinity, nitrate concentration, chlorophyll-a concentration and dissolved oxygen concentration. The data file is a self-documenting NetCDF file. See <http://www.unidata.ucar.edu/software/netcdf/>
Direct_Spatial_Reference_Method: Point
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: World Geodetic System of 1984
Ellipsoid_Name: World Geodetic System of 1984
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.25722210088
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Local surface
Depth_Resolution: 2.5
Depth_Distance_Units: meters
Depth_Encoding_Method: Implicit coordinate
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: National Center for Atmospheric Research
Contact_Person: Earth Observing Laboratory
Contact_Address:
Address_Type: mailing and physical
Address: 3450 Mitchell Lane
City: Boulder
State_or_Province: CO
Postal_Code: 80301
Country: USA
Contact_Voice_Telephone: 303-497-8154
Contact_Electronic_Mail_Address: codiac@ucar.edu
Contact_Electronic_Mail_Address: stott@ucar.edu
Distribution_Liability:
No warranty expressed or implied is made regarding the accuracy or utility of the data, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with the data. The NCAR and NPRB shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: XLS
File_Decompression_Technique: No compression applied
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://beringsea.eol.ucar.edu>
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
File_Decompression_Technique: No compression applied
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://beringsea.eol.ucar.edu>
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20120522
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: National Center for Atmospheric Research
Contact_Person: Earth Observing Laboratory
Contact_Address:
Address_Type: mailing and physical
Address: 3450 Mitchell Lane
City: Boulder
State_or_Province: CO
Postal_Code: 80301
Country: USA
Contact_Voice_Telephone: 303-497-8154
Contact_Electronic_Mail_Address: codiac@ucar.edu
Contact_Electronic_Mail_Address: stott@ucar.edu
Metadata_Standard_Name:
FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
This page is <http://www.eol.ucar.edu/projects/bsierp/docs/B62_Cokelet_Oscar_Dyson_2008.html>
Generated by mp version 2.9.23 on Mon Mar 24 15:06:22 2014