Dataset: Inter-comparison 2016: SAMI-pH and SeapHOx pH

Name: pH time-series from SAMI-pH and SeapHOx instruments during an inter-comparison of autonomous in situ instruments for ocean CO2 measurements under laboratory-controlled conditions at Scripps Institution of Oceanography in 2016
Published: 2022-03-01
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.870379.1

Temporal Extent: 2016-08-16 - 2016-08-27

Project:

A new tool for ocean carbon cycle and ocean acidification studies (Bermuda Biochem Timeseries)

Principal Investigator:

Michael DeGrandpre (University of Montana)

Co-Principal Investigator:

Todd R. Martz (University of California-San Diego, UCSD-SIO)

Student:

Qipei Shangguan (University of Montana)

Contact:

Qipei Shangguan (University of Montana)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-03-01

Restricted:

Validated:

Yes

Current State:

Final no updates expected

pH time-series from SAMI-pH and SeapHOx instruments during an inter-comparison of autonomous in situ instruments for ocean CO2 measurements under laboratory-controlled conditions at Scripps Institution of Oceanography in 2016

Abstract:

This dataset contains pH time series simultaneously recorded by 4 pH sensors. Two of them were SAMI-pH, and the other two were SeapHOx. Data interval was 15 min. These data were part of an inter-comparison of autonomous in situ instruments for ocean CO2 measurements under laboratory-controlled conditions at Scripps Institution of Oceanography in August of 2016. These data were published in Shangguan et al. (2022).

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2022-03-01	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.870379.1	2022-03-11

Methods & Sampling

This study used sensors (see Instrument description below) with quality control bottle samples. For bottle sample data and bottle analysis description, see Dataset "Inter-comparison 2016: Bottle Sample TA pH DIC" https://www.bco-dmo.org/dataset/870368

Instrument description:
This dataset has data from two SAMI-pHs (Sunburst Sensors, LLC; p66 and p87) (Seidel et al., 2008), two SeapHOx sensors (SP020 and SP032) (Bresnahan et al., 2014).
pH data have an interval of 15 mins.

Data Processing Description

Each sensor data was processed by its own Matlab script. MATLAB scripts convert raw data, which are optical intensities or voltages along with temperature and salinity, into their respective carbonate parameters.

BCO-DMO Data Manager Processing Notes:
* Data from source file "2016 pH sensor.xlsx" Sheet1 were imported into the BCO-DMO data system.
* Parameters (column names) renamed to comply with BCO-DMO naming conventions. See https://www.bco-dmo.org/page/bco-dmo-data-processing-conventions

Data Files

File
sami_seaphox_ph_2016.csv (Comma Separated Values (.csv), 50.14 KB) MD5:4629f59f0ba90d4f4a269cb3fd33eeea Primary data file for dataset ID 870379

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1459255

Deployments

None available yet

Instruments

pH Sensor

Supplied Name: SAMI-pHs

Supplied Description:

This table has data from two SAMI-pHs (Sunburst Sensors, LLC; p66 and p87) (Seidel et al., 2008). SAMI=Submersible Autonomous Moored Instrument

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

pH Sensor

Supplied Name: SeapHOx

Supplied Description:

SeapHOx sensors (SP020 and SP032) (Bresnahan et al., 2014)

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
time	Timestamp with time zone (UTC) in ISO 8601 format YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
SAMIpH_p66	pH from the SAMI-pH sensor<serial number p66>	unitless	pH
SAMIpH_p87	pH from the SAMI-pH sensor<serial number p87>	unitless	pH
SeapHOx_SP032	pH from the SeapHOx sensor<serial number SP032>	unitless	pH
SeapHOx_SP020	pH from the SeapHOx sensor <serial number SP020>	unitless	pH

Status message

Database

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Dataset: Inter-comparison 2016: SAMI-pH and SeapHOx pH