Dataset: In situ biogeochemical time-series in Bermuda 2017

Name: In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017
Published: 2019-12-05
Keywords: autonomous sensors, autonomous pCO2, autonomous alkalinity, autonomous pH, salinity, SAMI, DeGrandpre, Hog Reef, Bermuda, oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.783568.1

Spatial Extent: N:32.46 E:-64.83 S:32.46 W:-64.83

Temporal Extent: 2017-09-01 - 2017-09-22

Project:

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

Principal Investigator:

Michael DeGrandpre (University of Montana)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-12-05

Restricted:

Validated:

Yes

Current State:

Final no updates expected

In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017

Abstract:

In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2019-12-05	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.783568.1	2020-03-10

Description

In situ biogeochemical measurements including pCO2, pH, alkalinity, oxygen, temperature and salinity for a time-series in Bermuda, September 2017.

Methods & Sampling

The instruments were deployed on Hog Reef, Bermuda (32.46 oN, 64.83 oW), attached to the PMEL MAPCO2 buoy for the surface measurements, and anchored to the reef below the buoy at ~7 meters depth.

Real-time temperature, pCO2, pH, salinity, alkalinity and dissolved oxygen were determined in situ. Discrete samples were collected and stored in glass bottles, preserved with HgCl2.

SAMI-CO2 sampled on a 15 minute interval. SAMI-CO2 ran a non-absorbing blank measurement every 3.5 days.

SAMI-pH sampled on a 15 minute interval.

SAMI-Alk sampled on a 2 hour interval. SAMI-Alk ran a non-absorbing blank measurement for every measurement. A standard was run every 22 hours.

Dissolved oxygen was sampled on a 15 minute interval.

Temperature was recorded with SAMI-CO2, SAMI-pH on a 15 minute interval and with CTD on a 15 minute interval.

Salinity was recorded with CTD on a 15 minute interval.

Data Processing Description

SAMI data were processed through a custom-written Matlab QC program.

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- commented out units row
- reduced precision of temperature and pCO2 to 2 decimals, pH to 4 places, alkalinity to 1 place.

Data Files

File
sami_2017.csv (Comma Separated Values (.csv), 205.46 KB) MD5:aa1156febbda44e29b8e28ca12dabf45 Primary data file for dataset ID 783568

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SAMI_2017-09		2017-09-01	MAPCO2 Mooring Bermuda Hog Reef	Michael DeGrandpre (Scientist)	data info

Instruments

CTD Sea-Bird

Supplied Name: CTD (Sea-Bird)

Supplied Description:

CTD sensor measures conductivity, temperature and depth.

Instrument Type

Generic Name: CTD Sea-Bird

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

Conductivity, Temperature, Depth (CTD) sensor package from SeaBird Electronics, no specific unit identified. This instrument designation is used when specific make and model are not known. See also other SeaBird instruments listed under CTD. More information from Sea-Bird Electronics.

Submersible Autonomous Moored Instrument

Supplied Name: SAMI-Alk (Sunburst Sensors)

Supplied Description:

SAMI-Alk measures and logs levels of alkalinity in sea and fresh water.

Instrument Type

Generic Name: Submersible Autonomous Moored Instrument

Acronym: SAMI

Generic Description:

The Submersible Autonomous Moored Instrument (SAMI) measures and logs levels of dissolved chemicals in sea and fresh water. It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA). For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.

Submersible Autonomous Moored Instrument

Supplied Name: SAMI-CO2 (Sunburst Sensors)

Supplied Description:

Measures and logs levels of pCO2 in sea and freshwater. It is a plastic cylinder about 6 inches wide and 2 feet long that is self-powered and capable of hourly measurements for up to one year. All data collected are logged to an internal memory chip to be downloaded later. SAMI sensors usually are placed a few feet underwater on permanent moorings, while others on floating drifters sample the water wherever the wind and currents carry them. The instruments have been used by researchers around the globe in a variety of studies since 1999. Dr. Mike DeGrandpre, University of Montana, developed the SAMI between 1990 and 1993 during his postdoctoral work at the Woods Hole Oceanographic Institution (Woods Hole, MA, USA). For additional information, see URL: http://www.sunburstsensors.com/ from the manufacturer, Sunburst Sensors, LLC, 1226 West Broadway, Missoula, MT 59802.

Instrument Type

Generic Name: Submersible Autonomous Moored Instrument

Acronym: SAMI

Generic Description:

Submersible Autonomous Moored Instrument

Supplied Name: SAMI-pH (Sunburst Sensors)

Supplied Description:

SAMI-pH measures and logs levels of pH in sea and freshwater.

Instrument Type

Generic Name: Submersible Autonomous Moored Instrument

Acronym: SAMI

Generic Description:

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date_Time_UTC	sample collection date and time in UTC time; ISO-formatted as YYYY-MM-DDTHH:MMZ	unitless	ISO_DateTime_UTC
CTD_Sal_7m	salinity from CTD at 7 meters depth	unitless	sal
CTD_Temp_7m	temperature from CTD at 7 meters depth	degrees Celsius	temp
S22_pCO2_surface	SAMI-22 surface pCO2	micro-atmospheres (uatm)	pCO2
S22_Temp_surface	SAMI-22 surface temperature	degrees Celsius	temp
S22_DO_surface	SAMI-22 surface dissolved oxygen concentration	micromol/kilogram (umol/kg)	O2
S53_pCO2_7m	SAMI-53 pCO2 at 7 meters depth	micro-atmospheres (uatm)	pCO2
S53_Temp_7m	SAMI-53 temperature at 7 meters depth	degrees Celsius	temp
S53_DO_7m	SAMI-53 dissolved oxygen at 7 meters depth	micromol/kilogram (umol/kg)	O2
S13_pH_7m	SAMI-13 pH at 7 meters depth	unitless; pH scale	pH
S13_Temp_7m	SAMI-13 temperature at 7 meters depth	degrees Celsius	temp
SA03_Date_UTC	SAMI-Alkalinity_03 UTC sample date and time; ISO-formatted as YYYY-MM-DDTHH:MMZ	unitless	ISO_DateTime_UTC
SA03_Alkalinity_7m	SAMI-Alkalinity_03 alkalinity at 7 meters depth	micromol/kilogram (umol/kg)	TALK
SA03_Temp_7m	SAMI-Alkalinity_03 temperature at 7 meters depth	degrees Celsius	temp
Benchtop_Date_UTC	UTC sample date and time; ISO-formatted as YYYY-MM-DDTHH:MMZ	unitless	ISO_DateTime_UTC
Benchtop_Alkalinity	alkalinity measured using a benchtop unit	micromol/kilogram (umol/kg)	TALK

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