Dataset: GP15 Bottle Leg 2
Deployment: RR1815

Bottle file from US GEOTRACES PMT (GP15) Leg 2

Principal Investigator:

Karen L. Casciotti (Stanford University)

Co-Principal Investigator:

Gregory A. Cutter (Old Dominion University, ODU)

Phoebe J. Lam (University of California-Santa Cruz, UCSC)

Contact:

Karen L. Casciotti (Stanford University)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

US GEOTRACES Pacific Meridional Transect (GP15) (U.S. GEOTRACES PMT)

Deployment Synonyms:

GP15, GP15 Leg 2, 33RR20180918, PMT, US GEOTRACES PMT

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/824877/data

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Description

Bottle data collected by the GTC (GEOTRACES Trace element Carousel) and ODF (Ocean Data Facility) CTD rosettes, underway, and tow fish on Leg 2 of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15) from October to November 2018. Data from the different sampling systems was compiled into one file by ODF. For complete acquisition and processing information, refer to the cruise report (PDF).

Methods & Sampling

Dataset acquisition description

Data Processing Description

Dataset Processing Description

Unit conversion for nutrients and oxygen:
Nutrients and oxygen were measured onboard the ship in umol/L, but are reported in umol/kg in this dataset. The ODF group used the following protocols for conversion:

For converting nutrient and oxygen measurements to units of umol/kg, density was calculated according to EOS-80, using the best available salinities (either bottle or CTD, depending on quality flag in that order). The source for temperature depends on the analyte. For oxygen, the draw temperature at the time of collection was used for density calculations (Culberson, 1991; WHP Operations and Methods, Dissolved Oxygen). For nutrients, the measured analytical lab temperature was used for density calculations (Becker et al., 2021; GO-SHIP Repeat Hydrography Manual: The precise and accurate determination of dissolved inorganic nutrients in seawater, using Continuous Flow Analysis methods). The lab temperature was measured at the location of the instrument, and the samples themselves were allowed to come to lab temperature before analysis.

Quality Flags:
FLAG columns follow the WOCE Hydrographic Program (WHP) quality flag definitions.

The WHP quality codes for the water bottle itself are:
1 = Bottle information unavailable.
2 = No problems noted.
3 = Leaking.
4 = Did not trip correctly.
5 = Not reported.
6 = Significant discrepancy in measured values between Gerard and Niskin bottles.
7 = Unknown problem.
8 = Pair did not trip correctly. Note that the Niskin bottle can trip at an unplanned depth while the Gerard trips correctly and vice versa.
9 = Samples not drawn from this bottle.
(Flags 6, 7, and 8 apply primarily to large volume samplers.)

The WHP bottle parameter data quality codes are:
1 = Sample for this measurement was drawn from water bottle but analysis not received. Note that if water is drawn for any measurement from a water bottle, the quality flag for that parameter must be set equal to 1 initially to ensure that all water samples are accounted for.
2 = Acceptable measurement.
3 = Questionable measurement.
4 = Bad measurement.
5 = Not reported.
6 = Mean of replicate measurements (Number of replicates should be specified).
7 = Manual chromatographic peak measurement.
8 = Irregular digital chromatographic peak integration.
9 = Sample not drawn for this measurement from this bottle.

The WHP CTD data quality codes are:
1 = Not calibrated.
2 = Acceptable measurement.
3 = Questionable measurement.
4 = Bad measurement.
5 = Not reported.
6 = Interpolated over >2 dbar interval.
7 = Despiked.
8 = Not assigned for CTD data.
9 = Not sampled.

BCO-DMO Processing:
- changed time format to hhmm;
- added ISO8601 date/time column;
- filled in missing values with "nd";
- replaced -999 and -999.000 with "nd";
- Version history:
- 2021-05-05 (v5; current) - replaced with file received 2021-05-03, which includes several corrections/edits.
- 2020-09-22 (v4) - from original file named "33RR20180918_hy1_v5_door_barcodes.xlsx"; contains GEOTRACES DOoR-formatted names; splits the data into one file per leg.
- 2020-03-02 (v3) - from original file named "33RR20180918_hy1_v5.xlsx" submitted on 02-March-2020.
- 2019-10-22 (v2) - from original file named "33RR20180918_hy1_v4_pjl.xlsx" submitted on 2019-10-14.
- 2019-09-25 (v1) - from original file named "33RR20180918_hy1_v3.csv" submitted on 2019-09-10.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1657781	NSF Division of Ocean Sciences
OCE-1657944	NSF Division of Ocean Sciences
OCE-1658318	NSF Division of Ocean Sciences

Instruments

GeoFish Towed near-Surface Sampler

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: GeoFish Towed near-Surface Sampler

Acronym: GeoFish

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/31/

Generic Description:

The GeoFish towed sampler is a custom designed near surface (<2m) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz).

GO-FLO Bottle

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: GO-FLO Bottle

Acronym: GO-FLO

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/30/

Generic Description:

GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.

Niskin bottle

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Rinko III ARO-CAV Oxygen Sensor

Supplied Name:

Supplied Description:

A RINKO III (ARO-CAV) optical dissolved oxygen sensor was deployed on this cruise. See the following documents for more information:

ARO-CAV0296_170410.pdf (calibration certificate provided by ODF)
RinkoIII_Manual.pdf (Rinko manual provided by ODF)

Instrument Type

Generic Name: Rinko III ARO-CAV Oxygen Sensor

Acronym: RINKO III

Generic Description:

The RINKO III is a fast-response optical dissolved oxygen (DO) and temperature sensor. The DO sensor is coated with photostimulable phosphor (PSP) on the outside of the pressure-resistant acrylic optical window, measuring phosphorescence quenching phase shift. The excitation blue LED pulse generates a red phosphorescence pulse, which in turn has an inverse correlation with the oxygen partial pressure in the water. It is an analogue output version. It has a response time of less than 1 second in air, enabling dissolved oxygen measurements with continuous profiling at high speeds. The dissolved oxygen sensor has a non-linear accuracy of +/-2% of full scale (at 1atm, 25 deg C) and the temperature sensor +/-0.02 deg C. It has a pressure rating of 7000 m. This device is made by JFE Advantech Co. Ltd.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
EXPOCODE	Expedition code	unitless	EXPOCODE
SECT_ID	Section ID	unitless	cruise_name
STNNBR	Station number	unitless	station
CASTNO	Cast Identifier	unitless	cast
SAMPNO	Sample number	unitless	sample
BTLNBR	Bottle Number	unitless	bottle
BTLNBR_FLAG_W	Bottle quality flag; see WHP quality codes for the water bottle itself	unitless	q_flag
GEOTRC_EVENTNO	GEOTRACES Event number	unitless	event
GEOTRC_SAMPNO	GEOTRACES Sample number	unitless	sample
DATE	Date; format: yyyymmdd	unitless	date
TIME	Time; format: HHMM	unitless	time
LATITUDE	Latitude; positive values = North	decimal degrees	lat
LONGITUDE	Longitude; positive values = East	decimal degrees	lon
DEPTH	Bottom depth	meters (m)	depth_w
CTDPRS	Sample/sensor pressure	decibars	press
CTDTMP	Temperature from CTD sensor in the ITS-90 convention	degrees Celsius	temp
CTDSAL	Practical salinity from CTD sensor on the PSS-1978 scale	psu	sal
CTDSAL_FLAG_W	CTDSAL flag	unitless	q_flag
Sigma0	Sigma theta	kilograms per cubic meter (kg/m3)	sigma_0
REFTMP	Reference temperature; ITS-90	degrees Celsius	temp
REFTMP_FLAG_W	REFTMP flag	unitless	q_flag
BTL_DATE	Date of bottle firing; format: yyyymmdd	unitless	date
BTL_TIME	Time of bottle firing: format: HHMM	unitless	time
BTL_ISO_DateTime_UTC	Date and time (UTC) of bottle firing formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ	yyyy-MM-dd'T'HH:mm'Z'	ISO_DateTime_UTC
BTL_LAT	Latitude of bottle firing; positive values = North	decimal degrees	lat
BTL_LON	Longitude of bottle firiing; positive values = East	decimal degrees	lon
SILICATE_D_CONC_BOTTLE_3fot83	Concentration of dissolved silicate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	Silicate
Flag_SILICATE_D_CONC_BOTTLE_3fot83	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
PHOSPHATE_D_CONC_BOTTLE_d0rgav	Concentration of dissolved phosphate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	PO4
Flag_PHOSPHATE_D_CONC_BOTTLE_d0rgav	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRATE_D_CONC_BOTTLE_bugat8	Concentration of dissolved NITRATE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO3
Flag_NITRATE_D_CONC_BOTTLE_bugat8	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRITE_D_CONC_BOTTLE_sxduhh	Concentration of dissolved NITRITE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO2
Flag_NITRITE_D_CONC_BOTTLE_sxduhh	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
OXYGEN_D_CONC_BOTTLE_n41f8b	Concentration of dissolved oxygen from a bottle sample	micromoles per kilogram (umol/kg)	O2
Flag_OXYGEN_D_CONC_BOTTLE_n41f8b	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SALINITY_D_CONC_BOTTLE_zva7jm	Practical salinity from bottle sample on the PSS-1978 scale	psu	sal
Flag_SALINITY_D_CONC_BOTTLE_zva7jm	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SILICATE_D_CONC_FISH_7yvjjv	Concentration of dissolved silicate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	Silicate
Flag_SILICATE_D_CONC_FISH_7yvjjv	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
PHOSPHATE_D_CONC_FISH_vdvft4	Concentration of dissolved phosphate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	PO4
Flag_PHOSPHATE_D_CONC_FISH_vdvft4	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRATE_D_CONC_FISH_0w2yqg	Concentration of dissolved NITRATE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO3
Flag_NITRATE_D_CONC_FISH_0w2yqg	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRITE_D_CONC_FISH_txbmxd	Concentration of dissolved NITRITE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO2
Flag_NITRITE_D_CONC_FISH_txbmxd	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SALINITY_D_CONC_FISH_yp29up	Practical salinity from a towed fish sample on the PSS-1978 scale	psu	sal
Flag_SALINITY_D_CONC_FISH_yp29up	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SILICATE_D_CONC_PUMP_nttq7z	Concentration of dissolved silicate in a water sample collected using a bottle attached to a pump, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	Silicate
Flag_SILICATE_D_CONC_PUMP_nttq7z	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
PHOSPHATE_D_CONC_PUMP_l3cyv3	Concentration of dissolved phosphate in a water sample collected using a bottle attached to a pump, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	PO4
Flag_PHOSPHATE_D_CONC_PUMP_l3cyv3	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRATE_D_CONC_PUMP_cm2gtk	Concentration of dissolved NITRATE in a water sample collected using a bottle attached to a pump, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO3
Flag_NITRATE_D_CONC_PUMP_cm2gtk	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRITE_D_CONC_PUMP_ggojec	Concentration of dissolved NITRITE in a water sample collected using a bottle attached to a pump, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO2
Flag_NITRITE_D_CONC_PUMP_ggojec	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
OXYGEN_D_CONC_PUMP_vehiol	Concentration of dissolved oxygen from a bottle attached to a pump	micromoles per kilogram (umol/kg)	O2
Flag_OXYGEN_D_CONC_PUMP_vehiol	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SALINITY_D_CONC_PUMP_8noyqg	Practical salinity on the PSS-1978 scale	psu	sal
Flag_SALINITY_D_CONC_PUMP_8noyqg	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SILICATE_D_CONC_UWAY_ajega0	Concentration of dissolved silicate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	Silicate
Flag_SILICATE_D_CONC_UWAY_ajega0	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
PHOSPHATE_D_CONC_UWAY_f1jl3i	Concentration of dissolved phosphate, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	PO4
Flag_PHOSPHATE_D_CONC_UWAY_f1jl3i	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRATE_D_CONC_UWAY_mvcqwu	Concentration of dissolved NITRATE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO3
Flag_NITRATE_D_CONC_UWAY_mvcqwu	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
NITRITE_D_CONC_UWAY_7caiyo	Concentration of dissolved NITRITE, samples may or may not have been filtered	micromoles per kilogram (umol/kg)	NO2
Flag_NITRITE_D_CONC_UWAY_7caiyo	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
OXYGEN_D_CONC_UWAY_ulgjid	Concentration of dissolved oxygen from a ship's underway seawater sampling system	micromoles per kilogram (umol/kg)	O2
Flag_OXYGEN_D_CONC_UWAY_ulgjid	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
SALINITY_D_CONC_UWAY_fwcxbm	Practical salinity from a seawater sample collected using the ship's underway sampling system on the PSS-1978 scale	psu	sal
Flag_SALINITY_D_CONC_UWAY_fwcxbm	Quality flag; WHP bottle parameter data quality code	unitless	q_flag
CTDRINKO	Voltage from RINKO dissolved oxygen sensor	volts	O2_v
CTDRINKO_FLAG_W	CTDRINKO quality flag	unitless	q_flag
CTDFLUOR	Fluorescence from CTD sensor	volts	fluor
CTDFLUOR_FLAG_W	CTDFLUOR quality flag	unitless	q_flag
CTDXMISS	Transmissometer	volts	trans_v
CTDXMISS_FLAG_W	CTDXMISS quality flag	unitless	q_flag
CTDOXY	Concentration of dissolved oxygen from sensor on CTD	micromoles per kilogram (umol/kg)	O2
CTDOXY_FLAG_W	CTDOXY quality flag	unitless	q_flag

Database

Contribute Data

Dataset: GP15 Bottle Leg 2
Deployment: RR1815

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: GP15 Bottle Leg 2Deployment: RR1815

Dataset acquisition description

Dataset Processing Description

Dataset: GP15 Bottle Leg 2
Deployment: RR1815