Dataset: CTD data

Name: CTD data from AT39-01 (North Pond 2017 expedition) from the R/V Atlantis in the central North Atlantic during October 2017
Published: 2019-03-07
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.757722.1

Spatial Extent: N:22.81 E:-46.0507 S:22.7553 W:-46.0817

Temporal Extent: 2017-10-14 - 2017-10-27

Project:

Collaborative Research: A multidimensional approach to understanding microbial carbon cycling beneath the seafloor during cool hydrothermal circulation (Subseafloor Microbial Carbon Cycling)

Collaborative Research: Completing North Pond Borehole Experiments to Elucidate the Hydrology of Young, Slow-Spread Crust (North Pond 2017)

Investigation of viruses and microbes circulating deep in the seafloor (North Pond Viruses)

Program:

Center for Dark Energy Biosphere Investigations (C-DEBI)

Principal Investigator:

Grieg Steward (University of Hawaiʻi at Mānoa, SOEST)

BCO-DMO Data Manager:

Mathew Biddle (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-03-07

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD data from AT39-01 (North Pond 2017 expedition) from the R/V Atlantis in the central North Atlantic during October 2017

Abstract:

CTD data from AT39-01 (North Pond 2017 expedition).

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2019-03-07	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.757722.1	2019-03-07

Description

CTD data from AT39-01 (North Pond 2017 expedition)

Cast at3901001 was a test cast. No bottles were fired. Pumps were turned on at a depth of approximately 27 meters. Data above this depth should not be considered valid and were removed before submission. The oxygen sensor encountered at problem at approximately 310 meters on the upcast. Oxygen data should not be considered valid between this depth and the end of the cast at 100 meters. Only the downcast data is provided here.

On cast at3901002, fouling caused intermittent pump operation in the plumbing line between the Temp1, Cond1, and Oxygen sensors. These data were manually replaced with 9.99e-29. Data from Temp2, Cond2, and all other sensors is valid for this cast.

On cast at3901009, a noticeable offset was present in the Oxygen data for the upcast, following a prolonged (12+ hour) deployment. The sensor was cleaned following the cast and values returned to normal on all subsequent casts. Only the downcast data is provided here

Methods & Sampling

Software Version Seasave V 7.23.2

Data Processing Description

BCO-DMO Processing Notes:
- combined all files into one large file
- reformatted latitude and longitude into degrees
- reformatted date/time to ISO 8601 format
- appended lat, lon, time_ut, cast_id, and cast_no to the data from the headers
- added conventional header with dataset name, PI name, version date
- sorted by date/time and depth

Data Files

File
ctd.csv (Comma Separated Values (.csv), 9.80 MB) MD5:b739990744b620d0d1d109293b11f627 Primary data file for dataset ID 757722

Supplemental Files

File
at3901001_header filename: at3901001_header.txt (Octet Stream, 11.88 KB) MD5:8031873fad524ac2c3d2faa2892af7df Header Information Sample from first cast (at3901001)

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1636402
NSF Division of Ocean Sciences	OCE-1635208
NSF Division of Ocean Sciences	OCE-1635365
NSF Division of Ocean Sciences	OCE-1745589
NSF Division of Ocean Sciences	OCE-1536539
NSF Division of Ocean Sciences	OCE-1536601
NSF Division of Ocean Sciences	OCE-1536623
NSF Division of Ocean Sciences	OCE-1634025

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT39-01	North Pond 2017	2017-10-02	R/V Atlantis	C. Geoffrey Wheat (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: Sea-Bird SBE 9

Supplied Description:

Sea-Bird SBE 9 Data File

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Wet Labs ECO-AFL/FL Fluorometer

Supplied Name: WET Labs ECO-AFL/FL

Supplied Description:

WET Labs ECO-AFL/FL
Serial No.: FLTURT-964
Calibration Date: 22-Nov-16

Instrument Type

Generic Name: Wet Labs ECO-AFL/FL Fluorometer

Acronym: ECO AFL/FL

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0172/

Generic Description:

The Environmental Characterization Optics (ECO) series of single channel fluorometers delivers both high resolution and wide ranges across the entire line of parameters using 14 bit digital processing. The ECO series excels in biological monitoring and dye trace studies. The potted optics block results in long term stability of the instrument and the optional anti-biofouling technology delivers truly long term field measurements.
more information from Wet Labs

WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Supplied Name: WET Labs C Star

Supplied Description:

WET Labs C Star
serial number: CST-854DR
caibration date: 8-Dec-16

Instrument Type

Generic Name: WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Acronym: WL CSTAR Trans

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0160/

Generic Description:

The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.

More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717

WETLabs ECO-FLNTU

Supplied Name: WET Labs, ECO-NTU

Supplied Description:

WET Labs, ECO-NTU
Serial no.: FLTURT-964
Calibration date: 22-Nov-16

Instrument Type

Generic Name: WETLabs ECO-FLNTU

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0215/

Generic Description:

The ECO FLNTU is a dual-wavelength, single-angle sensor for simultaneously determining both chlorophyll fluorescence and turbidity.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
press	Pressure. Originally named 'prDM'.	decibars	press
temp	Primary temperature measurement. Originally named 't090C'.	degrees Celsius	temp
temp_2	Secondary tempearture measurement. Originally named 't190C'.	degrees Celsius	temp
cond	Primary conductivity measurement. Originally named 'c0S/m'.	Siemens/meter [S/m]	cond
cond_2	Secondary conductivity measurement. Originally named 'c1S/m'.	Siemens/meter [S/m]	cond
trans	Beam transmission expressed as percent. Originally named 'CStarTr0'.	unitless	trans
fluor	Fluorescence measured by WET Labs ECO-AFL/FL in milligrams per cubic meter. Originally named 'flECO-AFL'.	milligrams/cubic meter [mg/m^3]	fluor
turbidity	Turbidity measured by WET Labs ECO. Originally named 'turbWetntu0'.	NTU	turbidity
O2_v	Raw voltage from SBE43 oxygen sensor. Originally named 'Sbeox0V'.	volts	O2
depth	Depth. Originally named 'depSM'.	meters	depth
density	Primary measure of density in kilograms per cubic meter. Originally named 'density00'.	kilograms/cubic meter [kg/m^3]	density
density_2	Secondary measure of density in kilograms per cubic meter. Originally named 'density11'.	kilograms/cubic meter [kg/m^3]	density
sal	Primary salinity measurement. Originally named 'sal00'.	practical salinity units [PSU]	sal
sal_2	Secondary salinity measurement. Originally named 'sal11'.	practical salinity units [PSU]	sal
sound_vel	Sound velocity in meters per second. Originally named 'svCM'.	meters/second [m/s]	sound_vel
sound_vel_2	Sound velocity in meters per second from secondary sensor. Originally named 'svCM1'.	meters/second [m/s]	sound_vel
O2	Oxygen concentration from SBE 43. Originally named 'sbeox0Mm/L'.	micromol/liter [umol/l]	O2
flag	Quality flag; bad flag = -9.99e-29.	unitless	flag
time_utc	date and time in ISO 8601 format yyyy-m-ddTHH:MM:SS	unitless	ISO_DateTime_UTC
lon	longitude. East is positive; negative denotes West.	decimal degrees	lon
lat	latitude. North is positive; negative denotes South	decimal degrees	lat
cast_id	identifier for the cast	unitless	cast
cast_no	number for the cast	unitless	cast

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Dataset: CTD data

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