Dataset: Biogenic and lithogenic silica in Southern Ocean marine suspended particulate material (0-1000 m)

Name: Biogenic and lithogenic silica concentrations from marine suspended particles collected during the 2011 CLIVAR S04P expedition on RVIB Nathaniel B. Palmer from February 19 to April 19, 2011
Published: 2024-07-08
Keywords: Southern Ocean, biogenic silica, diatom, CLIVAR, oceans

View Data: Data not available yet

Cite This Dataset

Spatial Extent: N:-67 E:-175.47 S:-75.46 W:179.42

Pacific sector of the Southern Ocean

Temporal Extent: 2011-02-23 - 2011-04-19

Project:

Collaborative Research: Iron Incorporation into Biogenic Silica (SO-Fe-bSi)

Program:

U. S. Climate Variability and Predictability (U.S. CLIVAR)

Principal Investigator:

Peter L. Morton (Florida State University, FSU)

Scientist:

Jeffrey W. Krause (Dauphin Island Sea Lab, DISL)

BCO-DMO Data Manager:

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

Version:

Version Date:

2024-07-08

Restricted:

Yes

Release Date:

2024-09-10

Validated:

Current State:

Data not available

Biogenic and lithogenic silica concentrations from marine suspended particles collected during the 2011 CLIVAR S04P expedition on RVIB Nathaniel B. Palmer from February 19 to April 19, 2011

Abstract:

This dataset reports biogenic and lithogenic silica concentrations (in micromoles per liter (µmol/L)) from marine suspended particles collected during the 2011 CLIVAR S04P expedition on RVIB Nathaniel B. Palmer, 19 Feb-19 April 2011, which followed the 67° South parallel in the Pacific sector of the Southern Ocean, from the Ross Sea to the Western Antarctic Peninsula. Water from the upper 1000 meters was collected using a contamination-free trace metal rosette (12-liter Teflon-coated GO-Flo bottles). Samples were collected by Dr. Chris Measures (University of Hawaii-Manoa), Dr. William Landing (Florida State University), and Mr. Brian Kilgore (Florida State University). Samples were processed by Dr. Pete Morton (Florida State University) in the laboratory of Dr. Jeffrey Krause (Dauphin Island Sea Lab). These data serve as a proxy for the abundance and biogeographic distribution of siliceous phytoplankton, especially diatoms.

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Methods & Sampling

Water (2-10.9 liters) from each GO-Flo was filtered over a 47-millimeter (mm) diameter, 0.4-micrometer (µm) pore size PCTE filter (Measures et al., 2008). Samples were stored in new Whatman petri slides, double-bagged, at room temperature until ready for processing. The filters were subdivided into thirds or quarters using a ceramic rotary blade on a clean acrylic panel.

One subsection (1/3 or 1/4) was processed for biogenic and lithogenic silica concentrations, according to Krause et al. (2009) and Brzezinski and Nelson (1995). In brief, the filter subsample was submerged in 0.2 N NaOH for 2 hours in Teflon tubes to dissolve the silica. The resulting solution was reacted with ammonium molybdate, metol, and oxalic acid to produce silicomolybous acid, the absorbance of which was measured spectrophotometrically.

Lithogenic silica concentrations were determined using a subsample of the original NaOH digest solution, which was diluted with DI water and centrifuged. The supernatant was taken to dryness then digested again using HF over 48 hours. Boric acid was added to the HF solution, which was then reacted and analyzed in the same way as the biogenic silica digest solutions.

Concentrations were determined using matrix-matched standards for both the biogenic and lithogenic digest solutions.

Data Processing Description

Data were processed using Microsoft Excel (quantification by external standards using 1 centimeter (cm) or 10 cm cell).

BCO-DMO Processing

- Imported original file "S04P 2011 bSi lSi 2024_05_15.xlsx" into the BCO-DMO system.
- Imported bottle file "320620110219_hy1.csv" obtained from CCHDO on 2024-07-08 (source: https://cchdo.ucsd.edu/cruise/320620110219).
- Added DATE column from the bottle file; joining data by station number.
- Converted DATE column to YYYY-MM-DD format.
- Saved the final file as "931843_v1_nbp1102_biogenic_and_lithogenic_silica.csv".

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1658311

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
NBP1102	320620110219 CLIVAR S04P 2011	2011-02-19	RVIB Nathaniel B. Palmer	James H. Swift (Chief Scientist)	data info

Instruments

GO-FLO Bottle

Supplied Name: General Oceanics GO-Flo bottles

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.

Spectrophotometer

Supplied Description:

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	station identification number	unitless	station
DATE	date of sample collection Format: %Y-%m-%d	unitless	date
LATITUDE	latitude of sample collection; negative values = South	decimal degrees	lat
LONGITUDE	longitude of sample collection; negative values = West	decimal degrees	lon
Depth	sample depth	meters (m)	depth
BSi	biogenic silica	micromoles per liter (umol/L)	Si_bio
Lsi	lithogenic silica	micromoles per liter (umol/L)	Si_lith

Status message

Database

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Dataset: Biogenic and lithogenic silica in Southern Ocean marine suspended particulate material (0-1000 m)