Dataset: Series 2: CO2 Aggregation Experiment - Aggregate Sinking Velocity

Name: Aggregate Sinking Velocity from the CO2 Aggregation Experiment from UCSB Marine Science Institute Passow Lab from 2009 to 2010 (OA - Ocean Acidification and Aggregation project)
Published: 2013-05-07
Keywords: oceans

Cite This Dataset

Spatial Extent: N:34.4126 E:-119.842 S:34.4126 W:-119.842

Project:

Will Ocean Acidification Diminish Particle Aggregation and Mineral Scavenging, Thus Weakening the Biological Pump? (OA - Ocean Acidification and Aggregation)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Ocean Carbon and Biogeochemistry (OCB)

Principal Investigator:

Uta Passow (University of California-Santa Barbara, UCSB-MSI)

Co-Principal Investigator:

Dr Alice L. Alldredge (University of California-Santa Barbara, UCSB-MSI)

Contact:

Uta Passow (University of California-Santa Barbara, UCSB-MSI)

BCO-DMO Data Manager:

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

Version:

07 May 2013

Version Date:

2013-05-07

Validated:

Current State:

Final no updates expected

Aggregate Sinking Velocity from the CO2 Aggregation Experiment from UCSB Marine Science Institute Passow Lab from 2009 to 2010 (OA - Ocean Acidification and Aggregation project)

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Description

Series 2: CO2 Aggregation Experiment - Aggregate Sinking Velocity

The sinking velocities of ten randomly selected aggregates from each tank were measured
in a 2-liter cylindrical settling column that was 8 cm wide in a temperature constant room . Each
aggregate was allowed to sink out of the wide bore pipette into the settling column. The duration
of the descent of the aggregate over a distance of 20 cm, from 6 cm below the surface to 6 cm
above the bottom, was monitored using a stop watch. Just before this, the length and width of
each aggregate were measured to the nearest mm under a dissecting scope. Aggregate volume
was calculated based on an ellipsoid shape, assuming that width and depth were identical.

Reference: Passow, U., Rocha, C.L.D.L., Fairfield, C., Schmidt, K., 2014. Aggregation as a function of pCO2 and mineral particles. Limnology and Oceanography 59 (2), 532-547.

Methods & Sampling

See: Series 2: CO2 Aggregation Experiment - Methods

BCO-DMO Note:
Instruments listed apply to all phases of the Series 2 data.
Not just the experiment(s) represented in the individual dataset.

Data Processing Description

See: Series 2: CO2 Aggregation Experiment - Methods

BCO-DMO Note:
Instruments listed apply to all phases of the Series 2 data.
Not just the experiment(s) represented in the individual dataset.

BCO-DMO Processing Notes
Original file: "CO2 Aggregation ExperimentUtaApril2011-4.xlsx" contributed by Uta Passow
Sheet: "Agg sinking velocity"
- Approx Lat/Lon of Passow Lab appended to enable data discovery in MapServer
- "nd" (no data) inserted into blank cells
- Parameter names edited to conform to BCO-DMO parameter naming conventions

Data Files

File
Series2_CO2AggExp_AggSinkVel.csv (Comma Separated Values (.csv), 7.62 KB) MD5:b34b8083af2b293a3bc67fb9810ff863 Primary data file for dataset ID 3943

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0926711

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
lab_UCSB_MSI_Passow	Passow Lab	2009-09-01	UCSB MSI Passow	Uta Passow (Principal Investigator)	data info

Instruments

Aggregate Camera

Supplied Description:

The settled aggregates were then photographed for image analysis of their size and total number.

Instrument Type

Generic Name: Aggregate Camera

Acronym: AggrCam

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/180/

Generic Description:

A type of underwater camera system used for photographing aggregates in tanks or other containers.

Automatic titrator

Supplied Name: Automatic titrator - TitroLine alpha plus (Schott Instruments, Mainz, Germany)

Supplied Description:

TA was calculated from linear Gran plots (Gran 1952) after duplicate potentiometric titration (Brewer et al. 1986) using a TitroLine alpha plus (Schott Instruments, Mainz, Germany). Average precision was ± 5 μmol kg-1. Certified Reference Materials (CRMs, Batch No. 54) supplied by A. Dickson (Scripps Institution of Oceanography, USA) was used as a control.

Instrument Type

Generic Name: Automatic titrator

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

Generic Description:

Instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached.

CHN Elemental Analyzer

Supplied Name: CHN Elemental Analyzer - CEC 44OHA by Control Equipment Corp

Supplied Description:

The filters for POC and PON were fumed to remove inorganic carbon and analyzed at the Analytical Laboratory of the Marine Science Institute at UCSB using an elemental analyzer (CEC 44OHA by Control Equipment Corp).

Instrument Type

Generic Name: CHN Elemental Analyzer

Acronym: CHN_EA

Generic Description:

A CHN Elemental Analyzer is used for the determination of carbon, hydrogen, and nitrogen content in organic and other types of materials, including solids, liquids, volatile, and viscous samples.

Conductivity Meter

Supplied Name: Conductivity Meter - 3100 Yellow Springs Instruments

Supplied Description:

Salinity was determined from TA samples using a conductivity instrument (3100 Yellow Springs Instruments)

Instrument Type

Generic Name: Conductivity Meter

Generic Description:

Conductivity Meter - An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. Commonly used in hydroponics, aquaculture and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.

Flow Injection Analyzer

Supplied Name: Flow Injection Analyzer - QuickCem 8000, Lachat Instruments

Supplied Description:

Concentrations of NO3+NO2, PO4 and Si(OH)4 in the initial phytoplankton-detritus mixture were measured by simultaneous flow injection analysis (QuickCem 8000, Lachat Instruments) in the Analytical Laboratory of the Marine Science Institute at UCSB from pre-filtered frozen samples.

Instrument Type

Generic Name: Flow Injection Analyzer

Acronym: FIA

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB36/

Generic Description:

An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques.

In-situ incubator

Supplied Name: in-situ incubator

Supplied Description:

Instrument Type

Generic Name: In-situ incubator

Acronym: in-situ incubator

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/82/

Generic Description:

A device on a ship or in the laboratory that holds water samples under controlled conditions of temperature and possibly illumination.

Microscope - Optical

Supplied Name: Dissecting Microscope

Supplied Description:

The length and width of each aggregate were measured to the nearest mm under a dissecting scope.

Instrument Type

Generic Name: Microscope - Optical

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/

Generic Description:

Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope".

Nutrient Autoanalyzer

Supplied Name: Nutrient Autoanalyzer - TRAACS CS800 autoanalyzer

Supplied Description:

DIC was measured colorimetrically in duplicate with a TRAACS CS800 autoanalyzer (Seal, Mequon, USA) with a precision of ± 5 μmol kg-1. CRM (Batch No. 54) supplied by A. Dickson was used as a calibration (see for methodological details).

Instrument Type

Generic Name: Nutrient Autoanalyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/

Generic Description:

Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples.

Roller Tank

Supplied Description:

Roller tanks experiments: 14 cylindrical five-liter roller tanks/ treatments rotating at 1 rpm encompassing three acidification scenarios and 5 concentrations of the clay illite incubated at 14oC in continuous darkness for 44 to 48 hours. Solid body rotation was established within three hours.

Instrument Type

Generic Name: Roller Tank

Generic Description:

Rolling tanks, which keep particles in suspension, thus simulating aggregate formation in situ.

Marine snow experiments are conducted in roller tanks, which turn continuously, keeping marine snow in suspension. It is important for marine snow not to touch surfaces. The rolling tanks, which keep particles in suspension, thus simulate aggregate formation in situ. Marine snow formation due to different types of oil was tested. Some treatments are easily identifiable as containing oil by their color (middle). UCSB, CA 2012.

Shimadzu TOC-V Analyzer

Supplied Name: Shimadzu TOC-V

Supplied Description:

The filtered samples were immediately frozen at -20°C and later analyzed via high temperature combustion on a modified Shimadzu TOC-V analyzers in the Carlson lab at UCSB.

Instrument Type

Generic Name: Shimadzu TOC-V Analyzer

Acronym: Shimadzu TOC-V

Community Identifier: http://onto.nerc.ac.uk/CAST/124

Generic Description:

A Shimadzu TOC-V Analyzer measures DOC by high temperature combustion method.

Spectrophotometer

Supplied Name: Genesys 10SVIS Spectrophotometer

Supplied Description:

The samples for pHT were collected bubble free in 20-ml scintillation vials and measured within 1-2 hours of sampling with a spectrophotometer (Genesys 10SVIS) equipped with a single cell Peltier (SPG1A, both Thermo Scientific) using the indicator dye m-cresol purple (Sigma-Aldrich) at a constant temperature of 25oC.

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
TF_pCO2	TF CO2 conditions	text	treatment
clay	Volume of concentrated suspension of clay (illite) additions	ug/L	SPM
ESD	Equivalent Spherical Diameter	mm	no_bcodmo_term
sinking_velocity	Aggregate sinking velocity	meters/day	no_bcodmo_term
Lab_Id	Lab Id - Lab identifier where experiments were conducted	text	laboratory
Lat	Approximate Latitude Position of Lab; South is negative	decimal degrees	lat
Lon	Approximate Longitude Position of Lab; West is negative	decimal degrees	lon

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Dataset: Series 2: CO2 Aggregation Experiment - Aggregate Sinking Velocity