Dataset: chlorophyll_a

Name: Chlorophyll-a and phaeophytin analyzed by fluorometry from samples collected on R/V Challenger in the Long Island Sound in 2007
Published: 2012-05-14
Keywords: oceans

Cite This Dataset

Spatial Extent: N:41.25812 E:-72.3233 S:41.23428 W:-72.33708

Project:

Testing hypotheses about diversity, gene flow, and effective population size in marine planktonic ciliates (CiliateDivGenePop)

Principal Investigator:

George McManus (University of Connecticut, UConn - Avery Point)

Co-Principal Investigator:

Laura A. Katz (Smith College)

BCO-DMO Data Manager:

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

Version:

14 May 2012

Version Date:

2012-05-14

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/3655/data

Chlorophyll-a and phaeophytin analyzed by fluorometry from samples collected on R/V Challenger in the Long Island Sound in 2007

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Description

Chlorophyll-a and phaeophytin data analyzed by fluorometry for samples taken from Long Island Sound in June 2007.

Acquisition Description

Samples were collected from 6 stations on 01 June 2007 during the LIS0507 cruise. Sampling occurred at stations designed to capture the area where water exiting the Connecticut River forms a shallow plume of low-salinity water. 100 ml samples were collected on glass fiber filters and extracted in acetone (7 ml).

Processing Description

Calibration information: linear calibration factor (CF) = 0.0011, acidification coefficient (AF) = 1.97.

BCO-DMO made the following modifications to the dataset: format of parameter names was changed to conform to BCO-DMO conventions; blanks were replaced with 'nd'; removed sample date from the sample ID column; lat and lon values were converted from degrees/decimal minutes to decimal degrees; lon value of sample 267 was changed from 072 49.583 to 072 19.583 (presumed to be a typographical error).

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0648711

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
LIS0507		2007-06-01	R/V Challenger	George McManus (Principal Investigator)	data info

Instruments

Fluorometer

Supplied Description:

A TD-700 laboratory fluorometer was used. More information on this instrument is available in its datasheet.

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
year	Year the sample was collected, in YYYY format.	dimensionless	year
month_gmt	Month the sample was collected.	dimensionless	month_gmt
day_gmt	Day the sample was collected, in DD format.	dimensionless	day_gmt
yrday_gmt	Sequential day of the year on which the sample was collected.	dimensionless	yrday_gmt
sample_tube	ID number of the sample tube. Column originally named 'Tube ID'.	dimensionless	sample
sample	Unique identifier of the sample. Column originally named 'Sample ID'.	dimensionless	sample
vol_filt	Volume of sample filtered, in liters.	Liters	fluor_vol_filt
Fo	Fluorescence value before acidification. Units are arbitrary (fluorometer response).	N/A	unknown
Fa	Fluorescence value after acidification. Units are arbitrary (fluorometer response).	N/A	unknown
chl_a_fluor	Chlorophyll-a measured in micrograms/liter.	ug/L	chl_a_fluor
phaeo	Pheophytin (phaeophytin) measured in micrograms/liter.	ug/L	phaeo
phaeo_to_chl	Ratio of phaeo to chl_a_fluor multiplied by 100.	N/A	unknown
lat	Latitude in decimal degrees where the sample was collected. Values have been converted from degrees and decimal-minutes to decimal degrees.	decimal degrees	lat
lon	Longitude in decimal degrees where the sample was collected. Negative indicates West. Values have been converted from degrees and decimal-minutes to decimal degrees.	decimal degrees	lon

Database

Geospatial Access

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Dataset: chlorophyll_a