Dataset: CTD_MOCNESS10
Deployment: LMG0602

CTD data collected during MOCNESS-10 deployments, Southern Ocean, 2006

Chief Scientist:

Dr Laurence P. Madin (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Mr Erich Horgan (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Project:

Salpa Thompsoni in the Southern Ocean: Bioenergetics, Population Dynamics and Biogeochemical Impact (SouthernSalps)

Current State:

Final no updates expected

Version:

final

Version Date:

2018-03-27

Data URL:

https://www.bco-dmo.org/dataset-deployment/451519/data

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Description

CTD data collected during MOCNESS-10 deployments. CTD attached to MOCNESS-10 frame.

Methods & Sampling

Dataset acquisition description

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
ANT-0338090	NSF Antarctic Sciences

Instruments

CTD - profiler

Supplied Name: Conductivity, Temperature, Depth

Supplied Description:

Instrument Type

Generic Name: CTD - profiler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast.

This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934.

CTD MOCNESS

Supplied Description:

Instrument Type

Generic Name: CTD MOCNESS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/131/

Generic Description:

The CTD part of the MOCNESS includes 1) a pressure (depth) sensor which is a thermally isolated titanium strain gauge with a standard range of 0-5000 decibars full scale, 2) A Sea Bird temperature sensor whose frequency output is measured and sent to the surface for logging and conversion to temperature by the software in the MOCNESS computer (The system allows better than 1 milli-degree resolution at 10 Hz sampling rate), and 3) A Sea Bird conductivity sensor whose output frequency is measured and sent to the surface for logging and conversion to conductivity by the software in the computer (The system allows better than 1 micro mho/cm at 10 Hz sampling rate). The data rate depends on the speed of the computer and the quality of the cable. With a good cable, the system can operate at 2400 baud, sampling all variables at 2 times per second. One sample every 4 seconds is the default, although the hardware can operate much faster. (From The MOCNESS Manual)

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	cruise identification, e.g. NBP0202, for RVIB Palmer cruise 0202		cruiseid
temp	temperature of water	degrees C	temp
datatype	sampling method - instrument type, e.g. MOCNESS-1 or MOCNESS-10		datatype
year	year		year
tow	tow number		tow
day_local	day of month, local time, 1-31		day_local
month_local	month of year, local time, 1 - 12		month_local
yrday_local	year day as a decimal, based on Julian calendar, local; includes time due to precision	YYY.Yyyyyy	yrday_local
time_local	time, local using 24 hour clock to decimal minutes	HHmm.m	time_local
press	depth of observation or sample	meters	press
potemp	potential temperature or theta¹ ¹Fofonoff and Millard, 1983, UNESCO technical papers in Marine Sciences, #44		potemp
sal	salinity calculated from conductivity, bad values are set to 50		sal
sigma_0	potential density¹ ¹Fofonoff and Millard, 1983, UNESCO technical papers in Marine Sciences, #44		sigma_0
angle	angle of net frame relative to vertical (0-89 degrees)	degrees	tow_angle
flow	consecutive flow counts		flow
hzvel	horizontal net velocity	m/min	hzvel
vtvel	vertical net velocity	m/min	vtvel
vol_filt	volume filtered	meters<sup>3</sup>	vol_filt
net	MOCNESS net number, (00-08)		net
lat	latitude, negative = South	DD.D	lat
lon	longitude, negative = West	DDD.D	lon
station	Station number where tow was done.	text	station
flvolt	fluorescence in volts	volts	fluor

Database

Contribute Data

Dataset: CTD_MOCNESS10
Deployment: LMG0602

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CTD_MOCNESS10Deployment: LMG0602

Dataset acquisition description

Dataset Processing Description

Dataset: CTD_MOCNESS10
Deployment: LMG0602