Dataset: AE1910 MOCNESS Nets
Deployment: AE1910

MOCNESS data files (net) from AE1910

Principal Investigator:

Leocadio Blanco-Bercial (Bermuda Institute of Ocean Sciences, BIOS)

Amy Maas (Bermuda Institute of Ocean Sciences, BIOS)

Co-Principal Investigator:

Ann M. Tarrant (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Diel physiological rhythms in a tropical oceanic copepod (Zooplankton Diel Rhythm)

Data URL:

https://www.bco-dmo.org/dataset-deployment/775409/data

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Description

Methods & Sampling

Dataset acquisition description

The MOCNESS was oddly configured for this cruise. It was being powered by the new SIO system rather than the BESS instrumentation. All of the typical sensors had, however, been removed to support the use of a closing cod end system. Consequently the program did not calculate volume filtered (which you can calculate by multiplying flow counts by 5.8). Additionally there were some electronics errors (cast 5 and 6). These successfully captured organisms, but we flew the net blind.

Data Processing Description

Dataset Processing Description

Data Processing: Data from the net files was extracted using SBEDataProcessing software.

Problem Report: There were some electronics errors (cast 5 and 6). These successfully captured organisms, but we flew the net blind. For net 5 there is a net file, but for tow 6 even the net file was empty.

BCO-DMO Processing:
- added parameter names (using names from file header);
- converted to tsv files;
- aggregated data from separate tows into one dataset;
- added date/time from file headers: NMEA UTC (Time) (and re-formatted to ISO8601 format).

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1829318	NSF Division of Ocean Sciences
OCE-1829378	NSF Division of Ocean Sciences

Instruments

MOCNESS1

Supplied Name: MOCNESS

Supplied Description:

1 m MOCNESS, 150 micron mesh nets

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
tow	Tow number (based on file name)	unitless	tow
date_start	Date UTC at start of tow (from file header); format: yyyy-mm-dd	unitless	date
time_start	Time UTC at start of tow (from file header); format: hh:mm:ss	unitless	time
ISO_DateTime_UTC_start	Date and time (UTC) at start of tow formatted ISO8601 standard: yyyy-mm-ddTHH:MM:SS	unitless	ISO_DateTime_UTC
cruise	Cruise identifier	unitless	cruise_id
Date	Date (UTC); format: yymmdd	unitless	date
Time	Time (UTC); format: hhmmss	unitless	time
TC	Trip count (what net it thinks it is)	unitless	no_bcodmo_term
FC	Flow count	counts	flow
VOL	Volume filtered; note: the program did not calculate volume filtered correctly; you can calculate volumen filtered by multiplying flow counts by 5.8.	unitless	vol_filt
Pres	Pressure	millibars (mb)	press
Angle	Angle of the net	degrees	tow_angle

Database

Contribute Data

Dataset: AE1910 MOCNESS Nets
Deployment: AE1910

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: AE1910 MOCNESS NetsDeployment: AE1910

Dataset acquisition description

Dataset Processing Description

Dataset: AE1910 MOCNESS Nets
Deployment: AE1910