Dataset: BML Mooring pH
Deployment: BML_Mooring

SAMI pH sensor data from BML mooring

Co-Principal Investigator:

Brian Gaylord (University of California-Davis, UC Davis-BML)

Tessa M. Hill (University of California-Davis, UC Davis-BML)

Ann D. Russell (University of California-Davis, UC Davis)

Eric Sanford (University of California-Davis, UC Davis-BML)

BCO-DMO Data Manager:

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

Project:

Bodega Ocean Acidification Research (BOAR)

OCEAN ACIDIFICATION - Category 1: COLLABORATIVE RESEARCH: Acclimation and adaptation to ocean acidification of key ecosystem components in the California Current System (OMEGAS-MaS)

Current State:

Final with updates expected

Version:

07 September 2011

Deployment Synonyms:

BML

Version Date:

2013-10-21

Data URL:

https://www.bco-dmo.org/dataset-deployment/454850/data

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Description

Near-surface pH time series at BML mooring, offshore of Bodega Marine Laboratory, central California coast.
Dataset was updated on 21 October 2013 with data from 2012.
Dataset was updated on 31 March 2015 with data from 2013 and 2014.

(Note: This dataset was supported by funding to both the BOAR and OMEGAS projects.)

Methods & Sampling

Dataset acquisition description

01 Jan 2011 to 22 Feb 2011:
Time series collected continuously at a depth of ~1m below surface. Instrumentation includes Sunburst SAMI-pH, Durafet SeaFET, and Durafet SeapHOx. In some cases records from multiple instruments overlap in time. Quality control is still underway; accuracy and precision are yet to be verified.

25 May 2011 to 30 June 2011:
Hourly pH data from 5/25/2011 to 6/30/2011 using near-surface (~1 m) Sunburst Sensors SAMI pH. QA/QC not performed, these are raw data. Date stamp displayed in data has been corrected due to a glitch between SAMI and Excel.

13 April 2012 to 18 Nov 2012:
Hourly pH data from 4/13/2012 to 11/18/2012 using Sunburst Sensors SAMI pH (spectrophotometric) instruments and a SeapHox (FET) instrument, as well as temperature data from both sensor types.

08 May 2013 to 26 Nov 2013:
Hourly pH data from 06/11/2013 to 09/23/2013 using SepHOx sensor, and from 10/22/2013 to 11/26/2013 using the SAMI80 sensor.

08 Jan 2014 to 31 Dec 2014:
Hourly pH data from 01/08/2014 to 12/31/2014 using SepHOx sensor, and from 01/30/2014 to 03/19/2014 using the SAMI80 sensor.

Data Processing Description

Dataset Processing Description

QA/QC not performed. These are raw data. Data originally submitted to BCO-DMO as Excel files, "BML_moor_pH_Jan_1_2011-Feb_22_2011.xls" contributed by Brian Gaylord and "SAMI_pH_for_BCO_DMO.xlsx", "pH_2012_for_BCODMO.xlsx", "2013_BML_data_for_BCODMO.xlsx", and "2014_BML_data_for_BCODMO.xlsx" contributed by Tessa Hill.

Data notes:
bottle data provided here were analyzed on a SAMI pH, corrected for any offsets utilizing Dickson Standard.
2013 Data:
(1) before 6/11/2013 6:00:01 AM seapHOx was not working correctly, data questionable, EXT-INT very unstable.
(2) before 9/12/2013 9:00:00 PM and after 9/23/2013 8:00:00 PM seapHOx was not working correctly, data questionable, EXT-INT very unstable, also small gap inbetween removed.
(3) seaphox sent back to martz lab 10/15/2013, The controller board was a very old version and the durafet and ISE were both three years old.
(4) there is no 1m bottle data before 7/22/2013.
(5)

2014 Data:
(1) 5/13/2014 6:00:01 PM to 7/17/2014 7:00:00 PM salinity data for seapHOx >0.3 PSU off, microcat 4956 salinity used instead (last calibrated 20130109)
(2) 1/8/2014 10:00:00 PM to 5/13/2014 4:00:00 PM seapHOx standardization done with 2/5/2014 6:30 SAMI pH + OFFSET 1 meter bottle value
(3) 5/13/2014 6:00:01 PM to 7/17/2014 7:00:00 PM seapHOx standardization done with 5/21/2014 18:00 SAMI pH + OFFSET 1 meter bottle value
(4) 7/17/2014 8:00:00 PM to 12/31/2014 11:00:00 PM seapHOx standardization done with 7/17/2014 19:00 SAMI pH + OFFSET 1 meter bottle value with seapHOx 7/17/2014 20:00 values

BCO-DMO Edits
- Parameter names modified to conform to BCO-DMO convention
- Date reformatted to YYYYMMDD
- Time reformatted to HHMM.mm
- 'nd' (no data) inserted in blank cells
- 31 March 2015: removed restricted-only access to the dataset, added data from 2013 and 2014, added ISO_DateTime field.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0927255	NSF Division of Ocean Sciences

Instruments

SeapHOx/SeaFET

Supplied Description:

A SeapHox (FET) instrument was used to measure pH and temperature hourly.

Instrument Type

Generic Name: SeapHOx/SeaFET

Generic Description:

The SeapHOx and SeaFET are autonomous sensors originally designed and developed by the Todd Martz Lab at Scripps Institution of Oceanography. The SeaFET was designed to measure pH and temperature. The SeapHOx, designed later, combined the SeaFET with additional integrated sensors for dissolved oxygen and conductivity. Refer to Martz et al. 2010 (doi:10.4319/lom.2010.8.172).

The SeapHOx package is now produced by Sea-Bird Scientific and allows for integrated data collection of pH, temperature, salinity, and oxygen. Refer to Sea-Bird for specific model information.

Submersible Autonomous Moored Instrument

Supplied Description:

Sunburst Systems Submersible Autonomous Moored Instrument for pH (SAMI-pH).
Range: 7-9
Salinity Range: 30-36
Acc: +/- 0.003 pH units
Prec: <0.001 pH units

From http://bml.ucdavis.edu/boon/bml_buoy.html

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.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
date_gmt	Date, GMT.	YYYYMMDD	date_gmt
time_gmt	Time, 24-hour clock, GMT.	HHMM.mm	time_gmt
pH	pH (instrumentation includes Sunburst SAMI-pH, Durafet SeaFET, and Durafet SeapHOx).	sea water scale	pH_sw
temp	Temperature, in degrees C. (Instrumentation includes Sunburst SAMI-pH, Durafet SeaFET, and Durafet SeapHOx.)	degrees Celsius	temp
lat	Latitude of the mooring, North = positive.	decimal degrees	lat
lon	Longitude of the mooring, East = positive.	decimal degrees	lon
mooring	Name of the mooring.	text	mooring
month_gmt	2-digit month of year. e.g. 05 = May.	mm (01 to 12)	month_gmt
day_gmt	2-digit day of month, GMT.	dd (01 to 31)	day_gmt
year	Four-digit year.	YYYY	year
start_date	Sampling start date (GMT).	YYYYmmdd	start_date
end_date	Sampling end date (GMT).	YYYYmmdd	end_date
pH_SAMI80	pH as measured by SAMI80 instrument.	sea water scale	pH_sw
temp_SAMI80	Temperature, in degrees C, as measured by SAMI80 instrument.	degrees Celsius	temp
pH_SAMI83	pH as measured by SAMI83 instrument.	sea water scale	pH_sw
temp_SAMI83	Temperature, in degrees C, as measured by SAMI83 instrument.	degrees Celsius	temp
pH_SeapHOx	pH as measured by SeapHOx instrument.	sea water scale	pH_sw
temp_SeapHOx	Temperature, in degrees C, as measured by SeapHOx instrument.	degrees Celsius	temp
sal_SeapHOx	Salinity as measured by SeapHOx instrument.	PSU (practical salinity units)	sal
pH_SAMI_bot_0m	Bottle data (pH) from 0 meters depth analyzed on a SAMI pH, corrected for any offsets utilizing Dickson Standard.	sea water scale	pH
pH_SAMI_bot_1m	Bottle data (pH) from 1 meter depth analyzed on a SAMI pH, corrected for any offsets utilizing Dickson Standard.	sea water scale	pH
ISO_DateTime_UTC	Date and time formatted to ISO 8601 standard. This standard is based on ISO 8601:2004(E) and takes on the following format: YYYY-mm-ddTHH:MM:SS[.xx]Z (where T represent the start of the time string and Z indicates UTC) examples: 2009-08-30T09:05:00[.xx] (local time) 2009-08-30T14:05:00[.xx]Z (UTC time) 2009-08-30T14:05:00[.xx]-05:00 The dashes and the colons can be dropped. The T can also be dropped "by mutual agreement", but one needs the trailing Z if the time is UTC.	YYYY-MM-DDTHH:MM:SS[.xx]Z	ISO_DateTime_UTC

Database

Contribute Data

Dataset: BML Mooring pH
Deployment: BML_Mooring

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: BML Mooring pHDeployment: BML_Mooring

Dataset acquisition description

Dataset Processing Description

Dataset: BML Mooring pH
Deployment: BML_Mooring