Dataset: Size Fractionated Zooplankton Carbon and Nitrogen
Deployment: RR1813

Size fractionated zooplankton C:N, d13C and d15N from EXPORTS

Principal Investigator:

Brian N. Popp (University of Hawaii, UH)

Co-Principal Investigator:

Hilary G. Close (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Isotopic Indicators for Mechanisms of Organic Matter Degradation in the Northeast Pacific (EXPORTS) (EXPORTS Isotopes)

Current State:

Final no updates expected

Deployment Synonyms:

EXPORTS

Data URL:

https://www.bco-dmo.org/dataset-deployment/772779/data

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Description

Methods & Sampling

Dataset acquisition description

Zooplankton were collected using a multiple opening-closing net and environmental sensing system (MOCNESS). Onboard, zooplankton were wet-sieved in filter seawater using 0.2, 0.5, 1.0, 2.0, and 5.0 mm mesh sieves into different size fractions and frozen at -20 degrees Celsius. Zooplankton were dried and each fraction ground using a mortar and pestle. Samples were weighed into tin capsules and isotope ratios were determined using a Costech elemental combustion system coupled to an isotope ratio mass spectrometer through a Conflo-IV interface. For details please see Hannides et al. (2013).

Data Processing Description

Dataset Processing Description

BCO-DMO Processing:
- modified parameter names (replaced hyphens with underscores, replaced delta symbol with "d", changed "C:N" to "C_to_N");
- replaced blanks with "nd" (no data);
- added date-time field in ISO8601 format using original Date and Time columns.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1829425	NSF Division of Ocean Sciences
OCE-1830016	NSF Division of Ocean Sciences

Instruments

Elemental Analyzer

Supplied Name: Costech Model 4010

Supplied Description:

Costech Model 4010 elemental combustion system

Instrument Type

Generic Name: Elemental Analyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/

Generic Description:

Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.

Isotope-ratio Mass Spectrometer

Supplied Name: Thermo-Finnigan Delta Plus XP

Supplied Description:

Thermo-Finnigan Delta Plus XP isotope ratio mass spectrometer with Conflo IV interface.

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

MOCNESS1

Supplied Name: MOCNESS

Supplied Description:

Multiple opening-closing net and environmental sensing system (MOCNESS) net with 1 m2 opening using 0.2 mm mesh plankton nets (see Wiebe et al., 1976).

Instrument Type

Generic Name: MOCNESS1

Acronym: MOC1

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. The MOCNESS-1 carries nine 1-m2 nets usually of 335 micrometer mesh and is intended for use with the macrozooplankton. All nets are black to reduce contrast with the background. A motor/toggle release assembly is mounted on the top portion of the frame and stainless steel cables with swaged fittings are used to attach the net bar to the toggle release. A stepping motor in a pressure compensated case filled with oil turns the escapement crankshaft of the toggle release which sequentially releases the nets to an open then closed position on command from the surface. -- from the MOCNESS Operations Manual (1999 + 2003).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	Cruise designation	unitless	cruise_id
R2R_Event	R2R event number	unitless	event
Latitude	Latitude in degrees and decimal minutes N	degrees	lat
Longitude	Longitude in degrees and decimal minutes W	degrees	lon
Date	Sampling date: YYYYMMDD (UTC)	unitless	date
Time	Sampling time: deployment of net HH:MM:SS (UTC)	unitless	time
ISO_DateTime_UTC	Date and time formatted to ISO8601 standard. Format: yyyy-mm-ddTHH:MM:SS.ss	unitless	ISO_DateTime_UTC
MOCNESS_Tow	Shipboard MOCNESS tow designation	unitless	tow
DayNight	Indicates day or night tow	unitless	time_of_day
MOCNESS_Net	MOCNESS net number (of 10 nets)	unitless	net
DepthInterval_max	maximum depth of sample	meters	depth
DepthInterval_min	minimum depth of sample	meters	depth
VolFilt	volume of water filtered	cubic meters	vol_filt
SizeFraction_min	minimum wet sieved size fraction	micrometers (um)	samp_fraction
SizeFraction_max	maximum wet sieved size fraction	micrometers (um)	samp_fraction
SampleWeight	weight of sample analyzed	milligrams (mg)	weight
N	nitrogen content of sample	micrograms (ug)	net
d15N	nitrogen isotopic composition of sample	permil (‰) vs AIR	d15N_bio
C	organic carbon content of sample	micrograms (ug)	C
d13C	carbon isotopic compostion of sample	per mil (‰) vs VPDB	d13C_bio
C_to_N	C:N: carbon:nitrogen molar ratio	mol/mol	C_to_N

Database

Contribute Data

Dataset: Size Fractionated Zooplankton Carbon and Nitrogen
Deployment: RR1813

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Size Fractionated Zooplankton Carbon and NitrogenDeployment: RR1813

Dataset acquisition description

Dataset Processing Description

Dataset: Size Fractionated Zooplankton Carbon and Nitrogen
Deployment: RR1813