Dataset: Bermuda Reef Timeseries 2007-2012
Deployment: BIOS_BEACON

Bermuda Reef Timeseries 2007-2012

Principal Investigator:

Andreas Andersson (University of California-San Diego, UCSD-SIO)

Co-Principal Investigator:

Nicholas Bates (Bermuda Institute of Ocean Sciences, BIOS)

Contact:

Andreas Andersson (University of California-San Diego, UCSD-SIO)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

BErmuda ocean Acidification and COral reef iNvestigation (BEACON)

Current State:

Final no updates expected

Version:

05 November 2015

Version Date:

2015-11-05

Data URL:

https://www.bco-dmo.org/dataset-deployment/626116/data

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Description

Surface seawater carbonate chemistry parameters from the Bermuda coral reef platform (2007 - 2012). Bermuda reef data cover four spatial sites (Bouy 33 (B33), Tyne’s Bay (TB), Mid Platform (MP) and North Channel (NC)). The dataset contains measurements of surface seawater temperature, salinity, total dissolved inorganic carbon (DIC) and total alkalinity (TA) data.

Sampling:Locations:
Reef Site Name      Latitude  Longitude   
Bouy 33 (B33)       32.32957  -64.81760   
Tyne’s Bay (TB)     32.30966  -64.78230   
Mid Platform (MP)   32.37342  -64.78169   
North Channel (NC)  32.41597  -64.74285

Related files and references:
Andersson AJ, Yeakel KL, Bates NR, de Putron SJ (2014) Partial offsets in ocean acidification from changing coral reef biogeochemistry. Nat Clim Chang 4, 56-61.

Dickson AG, Sabine CL, Christian JR (2007) Guide to best practises for ocean CO₂measurements. PICES Special Publication, IOCCP Report no. 8.

Yeakel KL, Andersson AJ, Bates NR, Noyes TJ, Collins A, Garley R (2015) Shifts in coral reef biogeochemistry and resulting acidification linked to offshore productivity. Proc Natl Acad Sci USA, doi:10.1073/pnas.1507021112

Methods & Sampling

Dataset acquisition description

Sampling and Analytical Methodology:

From 2007 to 2012, surface seawater samples from the Bermuda coral reef platform were collected once a month at 0.5–1-m depth using a 5-L Niskin bottle. TA and DIC samples were collected according to standard protocols (Dickson et al., 2007) using 250-mL Kimax brand glass sample bottles. Samples were immediately poisoned with 100 μL saturated solution of HgCl₂. Temperature was measured in the Niskin bottle while samples for salinity were collected in glass bottles and later analyzed using an autosalinometer (Guildline Instruments). DIC was analyzed coulometrically using a UIC CM5011 CO₂coulometer combined with a VINDTA3C (Marianda Inc) or SOMMA system, alternatively based on infrared absorption using an AIRICA (Marianda, Inc) and a Li-Cor 7000 as the detector. TA was analyzed based on potentiometric acid titrations (∼0.1 N HCl) using a VINDTA3S (Marianda Inc). Performance and precision of the instruments were regularly verified using certified reference material (CRM) prepared by A. Dickson at Scripps In- stitution of Oceanography (SIO). The accuracy and precision of repli- cate CRMs on any given day of analyses were typically in the range of ±2–4 μmol kg⁻¹for both TA and DIC.

Data Processing Description

Dataset Processing Description

Sampling and Analytical Methodology:

BCO-DMO Processing Notes
- Generated from original file "BDA_reef_timeseries_2007-2012" contributed by Andreas Andersson
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date reformatted to YYYYMMDD

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0928406	NSF Division of Ocean Sciences

Instruments

Autosal salinometer

Supplied Name: autosalinometer

Supplied Description:

Samples for salinity were collected in glass bottles and later analyzed using an autosalinometer (Guildline Instruments)

Instrument Type

Generic Name: Autosal salinometer

Acronym: salinometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB30/

Generic Description:

The salinometer is an instrument for measuring the salinity of a water sample.

CO2 Coulometer

Supplied Name: UIC CM5011 CO2 coulometer

Supplied Description:

DIC was analyzed coulometrically using a UIC CM5011 CO2 coulometer combined with a VINDTA3C (Marianda Inc) or SOMMA system, alternatively based on infrared absorption using an AIRICA (Marianda, Inc) and a Li-Cor 7000 as the detector.

Instrument Type

Generic Name: CO2 Coulometer

Acronym: CO2 coulometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB12

Generic Description:

A CO2 coulometer semi-automatically controls the sample handling and extraction of CO2 from seawater samples. Samples are acidified and the CO2 gas is bubbled into a titration cell where CO2 is converted to hydroxyethylcarbonic acid which is then automatically titrated with a coulometrically-generated base to a colorimetric endpoint.

LI-COR LI-7000 Gas Analyzer

Supplied Name: Li-Cor 7000

Supplied Description:

Instrument Type

Generic Name: LI-COR LI-7000 Gas Analyzer

Acronym: LI-COR LI-7000

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/382/

Generic Description:

The LI-7000 CO2/H2O Gas Analyzer is a high performance, dual cell, differential gas analyzer. It was designed to expand on the capabilities of the LI-6262 CO2/ H2O Gas Analyzer. A dichroic beam splitter at the end of the optical path provides radiation to two separate detectors, one filtered to detect radiation absorption of CO2 and the other to detect absorption by H2O. The two separate detectors measure infrared absorption by CO2 and H2O in the same gas stream. The LI-7000 CO2/ H2O Gas Analyzer is a differential analyzer, in which a known concentration (which can be zero) gas is put in the reference cell, and an unknown gas is put in the sample cell.

MARIANDA VINDTA 3C total inorganic carbon and titration alkalinity analyser

Supplied Name: VINDTA3C (Marianda Inc)

Supplied Description:

Instrument Type

Generic Name: MARIANDA VINDTA 3C total inorganic carbon and titration alkalinity analyser

Acronym: inorganic carbon and alkalinity analyser

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0481/

Generic Description:

The Versatile INstrument for the Determination of Total inorganic carbon and titration Alkalinity (VINDTA) 3C is a laboratory alkalinity titration system combined with an extraction unit for coulometric titration, which simultaneously determines the alkalinity and dissolved inorganic carbon content of a sample. The sample transport is performed with peristaltic pumps and acid is added to the sample using a membrane pump. No pressurizing system is required and only one gas supply (nitrogen or dry and CO2-free air) is necessary. The system uses a Metrohm Titrino 719S, an ORION-Ross pH electrode and a Metrohm reference electrode. The burette, the pipette and the analysis cell have a water jacket around them. Precision is typically +/- 1 umol/kg for TA and/or DIC in open ocean water.

MARIANDA VINDTA 3C total inorganic carbon and titration alkalinity analyser

Supplied Name: SOMMA system

Supplied Description:

Instrument Type

Generic Name: MARIANDA VINDTA 3C total inorganic carbon and titration alkalinity analyser

Acronym: inorganic carbon and alkalinity analyser

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0481/

Generic Description:

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

From 2007 to 2012, surface seawater samples from the Bermuda coral reef platform were collected once a month at 0.5–1-m depth using a 5-L Niskin bottle.

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.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date of Sample Collection	YYYYMMDD	date
DecimalDate	Decimal Date of Sample Location	YYYY.xxxxxxxxxx	year_decimal
ReefSiteName	ReefSiteName (site abbrev) Reef sites: Bouy 33 (B33); TyneΓÇÖs Bay (TB); Mid Platform (MP); North Channel (NC)	text	site
Latitude	Latitude of Sample Location (South is negative)	decimal degrees	lat
Longitude	Longitude of Sample Location (West is negative)	decimal degrees	lon
Temperature	Temperature (Celsius)	degrees Celsius	temperature
Salinity	Salinity (psu)	psu	sal
TA	Total Alkalinity (TA; micromol/kg seawater)	micromol/kgSW	TALK
DIC	Total Dissolved Inorganic Carbon (DIC; micromol/kg seawater	micromol/kgSW	DIC

Database

Contribute Data

Dataset: Bermuda Reef Timeseries 2007-2012
Deployment: BIOS_BEACON

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Bermuda Reef Timeseries 2007-2012Deployment: BIOS_BEACON

Dataset acquisition description

Dataset Processing Description

Dataset: Bermuda Reef Timeseries 2007-2012
Deployment: BIOS_BEACON