Dataset: GoM WBTS 2012-2013 Calanus Chl a_Phaeopigment concentration

Name: Chlorophyll-a and Phaeophytin from two time series stations from R/V Gulf Challenger in the Gulf of Maine; Wilkinson Basin and Jeffreys Ledge, 2012-2013 (GoM_Calanus_2012-2013 project)
Published: 2015-02-03
Keywords: biota, oceans

Cite This Dataset

Spatial Extent: N:42.898 E:-69.861 S:42.862 W:-70.14

Project:

RAPID: Effect of a Very Low NAO Event on the Abundance of the Lipid-Rich Planktonic Copepod, Calanus finmarchicus, in the Gulf of Maine (GoM_Calanus_2012-2013)

Chief Scientist:

Jeffrey A. Runge (University of Maine)

Principal Investigator:

Jeffrey A. Runge (Gulf of Maine Research Institute, GMRI)

Contact:

Cameron Thompson (Gulf of Maine Research Institute, GMRI)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

working

Version Date:

2015-02-03

Restricted:

Validated:

Current State:

Final with updates expected

Chlorophyll-a and Phaeophytin from two time series stations from R/V Gulf Challenger in the Gulf of Maine; Wilkinson Basin and Jeffreys Ledge, 2012-2013 (GoM_Calanus_2012-2013 project)

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Description

Chl a/Phaeopigment concentration in water samples collected at depth from two time series stations in the Gulf of Maine (2012-2013).

Users are requested to consult with Jeffrey Runge prior to preparation of any manuscripts or reports, either written or online, that make use of zooplankton and hydrographic data originating from this study. The data are freely available without need for consultation with Dr. Runge after October, 2017.

Methods & Sampling

Duplicate 100 mL, or 500-550 mL water samples were collected with Nisken bottles at the surface, 10, 20 and 40 meters. The samples were filtered under low vacuum onto Whatman GFF glass fiber filters (0.8 um) and also frequently onto 5-µm and 20-µm polycarbonate membrane filters at selected depths. The filters were placed in 5 ml of 90% acetone and cold extracted for 24 h, after which fluorescence was measured with a Turner AU-10 fluorometer. After addition of hydrochloric acid a second fluorescence measurement was taken. Chlorophyll and pheopigment concentrations were calculated were using equations in Strickland and Parsons (1972).

Strickland, J.D.H., and T.R. Parsons, (1972). A Practical Handbook of Seawater Analysis, second ed. Bulletin of Fisheries Research Board, 167: 201–203.

Data Processing Description

Include here are the end results of calculations (Strickland and Parsons, 1972) for Chl a and Phaeophytin concentrations in the water (mg/m³). No observations have been flagged or removed, despite some negative values under the Phaeophytin column.

Data Files

File
Chla_GoM_rs.csv (Comma Separated Values (.csv), 16.56 KB) MD5:969b0dfa4d6aac4f878c53f27ee669a5 Primary data file for dataset ID 547810

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1235920

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
GC_GoM_2012-2013		2012-04-06	R/V Gulf Challenger	Jeffrey A. Runge (Chief Scientist)	data info

Instruments

Niskin bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Turner Designs Fluorometer 10-AU

Supplied Name: Turner Fluorometer -10AU

Supplied Description:

Instrument Type

Generic Name: Turner Designs Fluorometer 10-AU

Acronym: Turner Fluorometer 10-AU

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0393/

Generic Description:

The Turner Designs 10-AU Field Fluorometer is used to measure Chlorophyll fluorescence. The 10AU Fluorometer can be set up for continuous-flow monitoring or discrete sample analyses. A variety of compounds can be measured using application-specific optical filters available from the manufacturer. (read more from Turner Designs, turnerdesigns.com, Sunnyvale, CA, USA)

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
station	Either the Jeffreys ledge station WB-5 or Wilkinson Basin WBTS	text	station
latitude	latitude	decimal degrees; North is positive	lat
longitude	longitude	decimal degrees; West is negative	lon
cruiseid	Each deployment has its own cruise ID following this format: GC for R/V Gulf Challenger; followed by the date(mmddyy)	text	cruise_id
date_local	date local time	mmddyyyy	date_local
month_local	month local time	mm	month_local
day_local	day local time	dd	day_local
year	year	yyyy	year
depth	depth of water sample captured in Niskin bottle	meters	depth
filter	GF/F Whatman glass fiber filters (0.8µm); 5µm and 20µm are the pore sizes for SPI-Pore polycarbonate membrane filters	text	no_bcodmo_term
chla	chlorophyll A concentration according to Strickland and Parsons (1972)method and calculation	milligrams per cubic meter	chl_a
phaeo	Phaeophytin concentration according to Strickland and Parsons (1972)method and calculation	milligrams per cubic meter	phaeo

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Database

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Dataset: GoM WBTS 2012-2013 Calanus Chl a_Phaeopigment concentration