Dataset: CTD Biogenic Silica

Name: Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018
Published: 2019-10-30
Keywords: Southern Ocean, Ross Sea, biogenic silica, oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.780191.1

Spatial Extent: N:-72.4481 E:-116.00115 S:-78.6294 W:178.18135

Temporal Extent: 2017-12-31 - 2018-02-19

Project:

Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay (CICLOPS)

Principal Investigator:

Giacomo DiTullio (College of Charleston, CofC)

Co-Principal Investigator:

Peter Lee (College of Charleston, CofC)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-10-30

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018

Abstract:

Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2019-10-30	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.780191.1	2019-11-14

Description

Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from 2017-2018

Methods & Sampling

Water was collected from varying depths in the photic zone using a CTD. Samples were collected by gentle filtration under low vacuum through 0.6um polycarbonate filters. Filters were placed in glassine envelopes and dried at 65°C for approximately 24h. For analysis, filters were extracted in 0.2N NaOH for 45 minutes at 95°C. Samples were placed on ice and neutralized with 1N HCl to stop the extraction. Concentrations of silicic acid were determined using the colorimetric method described in Strickland and Parsons, 1972. Precautions were made keep samples contaminant-free, by using plasticware and MilliQ water.

Data Processing Description

Microsoft Excel was used to create standard curves and calculate biogenic silica concentrations

BCO-DMO processing notes:

- Adjusted column header names to fit database system

- Change date format to YYYY-MM-DD to comply with ISO format

Data Files

File
biogenic_silica.csv (Comma Separated Values (.csv), 22.50 KB) MD5:b5000906be79c7d577095bc1f2e14ef4 Primary data file for dataset ID 780191

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Office of Polar Programs (formerly NSF PLR)	OPP-1644073

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
NBP1801	CICLOPS Cobalamin and Iron Co-Limitation Of Phytoplankton Specie	2017-12-16	RVIB Nathaniel B. Palmer	Giacomo DiTullio (Chief Scientist) Robert B. Dunbar (Co-Chief Scientist) Grace Saba (Scientist)	data info

Instruments

UV Spectrophotometer-Shimadzu

Supplied Name: Shimadzu UV-1601 spectrophotometer

Supplied Description:

A Shimadzu UV-1601 spectrophotometer was used to measure the absorbance of silica standards and samples. A set of seven standards were run with each set of samples and the resulting standard curve was used to quantify the concentration of biogenic silica.

Instrument Type

Generic Name: UV Spectrophotometer-Shimadzu

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

Generic Description:

The Shimadzu UV Spectrophotometer is manufactured by Shimadzu Scientific Instruments (ssi.shimadzu.com). Shimadzu manufacturers several models of spectrophotometer; refer to dataset for make/model information.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date in UTC - format: YYY-MM-DD	unitless	date
Station	Station Identifier - Two sets of samples were labeled “Station 52” but were collected from different CTD casts. To clarify this samples from the second cast at station 52 were labeled 52_CTD 53.	unitless	station
Latitude	Latitude - South is negative	decimal degrees	lat
Longitude	Longitude - West is negative	decimal degrees	lon
Depth	Sample depth	meter (m)	depth
Niskin	Niskin Bottle Identifier	unitless	bot_Nis
Fltr_Vol	Volume filtered	liter (l)	vol_filt
Bsi	Concentration of biogenic silica	micromole (µM)	Si_bio
Sample	Sample number	unitless	sample