Dataset: CTD - AT37-12

Name: CTD data from 9 casts at the oxygen-deficient zone of the Eastern Tropical North Pacific (ETNP), RV/Atlantis cruise AT37-12, April-May 2017
Published: 2018-06-21
Keywords: Hydrothermal vent, CTD, oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.739098.1

Spatial Extent: N:14.03274 E:-89.9996 S:9.82022 W:-104.34815

Temporal Extent: 2017-04-25 - 2017-05-13

Project:

Collaborative Research: Environmental Drivers of Chemoautotrophic Carbon Production at Deep-Sea Hydrothermal Vents - Comparative Roles of Oxygen and Nitrate (vent O2 NO3 roles)

Principal Investigator:

Stefan M. Sievert (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Andrew R. Babbin (Massachusetts Institute of Technology, MIT-EAPS)

Contact:

Andrew R. Babbin (Massachusetts Institute of Technology, MIT-EAPS)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2018-06-21

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD data from 9 casts at the oxygen-deficient zone of the Eastern Tropical North Pacific (ETNP), RV/Atlantis cruise AT37-12, April-May 2017

Abstract:

CTD data from Atlantis cruise AT37-12 in the Eastern Tropical North Pacific in April and May 2017. Data from 9 casts are included.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2018-06-21	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.739098.1	2020-01-03

Description

CTD data from Atlantis cruise AT 37-12 in the Eastern Tropical North Pacific in April and May 2017.

Methods & Sampling

Header information from Sea-Bird SBE 9 data files (sample from cast 1):
* Sea-Bird SBE 9 Data File:
* FileName = C:\data\ctd\at3712001.hdr
* Software Version Seasave V 7.23.2
* Temperature SN = 4303
* Conductivity SN = 3009
* Number of Bytes Per Scan = 40
* Number of Voltage Words = 5
* Number of Scans Averaged by the Deck Unit = 1
* System UpLoad Time = Apr 25 2017 14:19:16
* NMEA Latitude = 14 01.97 N
* NMEA Longitude = 104 20.66 W
* NMEA UTC (Time) = Apr 25 2017 14:19:00
* Store Lat/Lon Data = Append to Every Scan
* System UTC = Apr 25 2017 14:19:16
# nquan = 26
# nvalues = 3003
# units = specified

# name 0 = timeS: Time, Elapsed [seconds]
# name 1 = longitude: Longitude [deg]
# name 2 = latitude: Latitude [deg]
# name 3 = prDM: Pressure, Digiquartz [db]
# name 4 = t090C: Temperature [ITS-90, deg C]
# name 5 = t190C: Temperature, 2 [ITS-90, deg C]
# name 6 = c0S/m: Conductivity [S/m]
# name 7 = c1S/m: Conductivity, 2 [S/m]
# name 8 = CStarTr0: Beam Transmission, WET Labs C-Star [%]
# name 9 = flECO-AFL: Fluorescence, WET Labs ECO-AFL/FL [mg/m^3]
# name 10 = turbWETntu0: Turbidity, WET Labs ECO [NTU]
# name 11 = sbeox0V: Oxygen raw, SBE 43 [V]
# name 12 = altM: Altimeter [m]
# name 13 = nbf: Bottles Fired
# name 14 = spar: SPAR/Surface Irradiance
# name 15 = T2-T190C: Temperature Difference, 2 - 1 [ITS-90, deg C]
# name 16 = depSM: Depth [salt water, m], lat = 14.0328
# name 17 = density00: Density [density, kg/m^3]
# name 18 = density11: Density, 2 [density, kg/m^3]
# name 19 = sal00: Salinity, Practical [PSU]
# name 20 = sal11: Salinity, Practical, 2 [PSU]
# name 21 = svCM: Sound Velocity [Chen-Millero, m/s]
# name 22 = svCM1: Sound Velocity, 2 [Chen-Millero, m/s]
# name 23 = sbeox0Mm/L: Oxygen, SBE 43 [umol/l], WS = 2
# name 24 = dz/dtM: Descent Rate [m/s], WS = 2
# name 25 = flag: flag

# span 0 = 10.777, 6384.982
# span 1 = -104.34815, -104.34439
# span 2 = 14.02820, 14.03274
# span 3 = 2.012, 1517.275
# span 4 = 3.0261, 29.5506
# span 5 = 3.0246, 29.5499
# span 6 = 3.203151, 5.633423
# span 7 = 3.202059, 5.631726
# span 8 = 97.9989, 100.2511
# span 9 = -0.0468, 1.1713
# span 10 = -0.1532, -0.1508
# span 11 = 0.5349, 2.6302
# span 12 = 19.15, 103.34
# span 13 = 0, 23
# span 14 = 3.2622e+00, 6.3235e+00
# span 15 = -0.5208, 0.1394
# span 16 = 2.000, 1503.000
# span 17 = 1021.1002, 1034.5674
# span 18 = 1021.0921, 1034.5583
# span 19 = 33.7034, 34.8581
# span 20 = 33.6949, 34.8381
# span 21 = 1485.17, 1543.87
# span 22 = 1485.17, 1543.86
# span 23 = 0.417, 206.650
# span 24 = -1.760, 1.703
# span 25 = 0.0000e+00, 0.0000e+00

# interval = meters: 1
# start_time = Apr 25 2017 14:19:00 [NMEA time, header]
# bad_flag = -9.990e-29

# <Sensors count="15" >
# <sensor Channel="1" >
# 
# <TemperatureSensor SensorID="55" >
# <SerialNumber>4303</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <F0_Old>0.000</F0_Old>
# <G>4.38501054e-003</G>
# <H>6.47529902e-004</H>
# <I>2.19462935e-005</I>
# <J>1.64955605e-006</J>
# <F0>1000.000</F0>
# <Slope>1.00000000</Slope>
# <Offset>0.0000</Offset>
# </TemperatureSensor>
# </sensor>

# <sensor Channel="2" >
# 
# <ConductivitySensor SensorID="3" >
# <SerialNumber>3009</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# 
# <SeriesR>0.0000</SeriesR>
# <CellConst>2000.0000</CellConst>
# <ConductivityType>0</ConductivityType>
# <Coefficients equation="0" >
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <M>0.0</M>
# <CPcor>-9.57000000e-008</CPcor>
# </Coefficients>
# <Coefficients equation="1" >
# <G>-1.04864981e+001</G>
# <H>1.48778269e+000</H>
# <I>3.67673536e-004</I>
# <J>5.06417242e-005</J>
# <CPcor>-9.57000000e-008</CPcor>
# <CTcor>3.2500e-006</CTcor>
# 
# <WBOTC>0.00000000e+000</WBOTC>
# </Coefficients>
# <Slope>1.00000000</Slope>
# <Offset>0.00000</Offset>
# </ConductivitySensor>
# </sensor>

# <sensor Channel="3" >
# 
# <PressureSensor SensorID="45" >
# <SerialNumber>0749</SerialNumber>
# <CalibrationDate>08-Apr-14</CalibrationDate>
# <C1>-4.970438e+004</C1>
# <C2>-4.005750e-001</C2>
# <C3>1.365700e-002</C3>
# <D1>3.669600e-002</D1>
# <D2>0.000000e+000</D2>
# <T1>3.027760e+001</T1>
# <T2>-4.522040e-004</T2>
# <T3>4.002070e-006</T3>
# <T4>1.971140e-009</T4>
# <Slope>0.99992397</Slope>
# <Offset>-1.86008</Offset>
# <T5>0.000000e+000</T5>
# <AD590M>1.283700e-002</AD590M>
# <AD590B>-8.706643e+000</AD590B>
# </PressureSensor>
# </sensor>

# <sensor Channel="4" >
# 
# <TemperatureSensor SensorID="55" >
# <SerialNumber>4360</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <F0_Old>0.000</F0_Old>
# <G>4.36265052e-003</G>
# <H>6.49800036e-004</H>
# <I>2.30621342e-005</I>
# <J>1.84888934e-006</J>
# <F0>1000.000</F0>
# <Slope>1.00000000</Slope>
# <Offset>0.0000</Offset>
# </TemperatureSensor>
# </sensor>

# <sensor Channel="5" >
# 
# <ConductivitySensor SensorID="3" >
# <SerialNumber>2707</SerialNumber>
# <CalibrationDate>20-Jan-16</CalibrationDate>
# <UseG_J>1</UseG_J>
# 
# <SeriesR>0.0000</SeriesR>
# <CellConst>2000.0000</CellConst>
# <ConductivityType>0</ConductivityType>
# <Coefficients equation="0" >
# <A>0.00000000e+000</A>
# <B>0.00000000e+000</B>
# <C>0.00000000e+000</C>
# <D>0.00000000e+000</D>
# <M>0.0</M>
# <CPcor>-9.57000000e-008</CPcor>
# </Coefficients>
# <Coefficients equation="1" >
# <G>-1.07265688e+001</G>
# <H>1.55946953e+000</H>
# <I>-1.31572164e-003</I>
# <J>1.86775491e-004</J>
# <CPcor>-9.57000000e-008</CPcor>
# <CTcor>3.2500e-006</CTcor>
# 
# <WBOTC>0.00000000e+000</WBOTC>
# </Coefficients>
# <Slope>1.00000000</Slope>
# <Offset>0.00000</Offset>
# </ConductivitySensor>
# </sensor>

# <sensor Channel="6" >
# 
# <OxygenSensor SensorID="38" >
# <SerialNumber>0072</SerialNumber>
# <CalibrationDate>16-Jan-16</CalibrationDate>
# <Use2007Equation>1</Use2007Equation>
# <CalibrationCoefficients equation="0" >
# 
# <Boc>0.0000</Boc>
# <Soc>0.0000e+000</Soc>
# <offset>0.0000</offset>
# <Pcor>0.00e+000</Pcor>
# <Tcor>0.0000</Tcor>
# <Tau>0.0</Tau>
# </CalibrationCoefficients>
# <CalibrationCoefficients equation="1" >
# 
# <Soc>4.8025e-001</Soc>
# <offset>-0.5316</offset>
# <A>-4.2594e-003</A>
# <B> 2.1935e-004</B>
# <C>-3.0959e-006</C>
# <D0> 2.5826e+000</D0>
# <D1> 1.92634e-004</D1>
# <D2>-4.64803e-002</D2>
# <E> 3.6000e-002</E>
# <Tau20> 2.5000</Tau20>
# <H1>-3.3000e-002</H1>
# <H2> 5.0000e+003</H2>
# <H3> 1.4500e+003</H3>
# </CalibrationCoefficients>
# </OxygenSensor>
# </sensor>

# <sensor Channel="7" >
# 
# </sensor>

# <sensor Channel="8" >
# 
# </sensor>

# <sensor Channel="9" >
# 
# <WET_LabsCStar SensorID="71" >
# <SerialNumber>CST-1117</SerialNumber>
# <CalibrationDate>20May15, Field 8Mar17</CalibrationDate>
# <M>20.9850</M>
# <B>-0.1538</B>
# <PathLength>0.250</PathLength>
# </WET_LabsCStar>
# </sensor>

# <sensor Channel="10" >
# 
# <FluoroWetlabECO_AFL_FL_Sensor SensorID="20" >
# <SerialNumber>FLTURT-1013</SerialNumber>
# <CalibrationDate>2014-April-25</CalibrationDate>
# <ScaleFactor>6.00000000e+000</ScaleFactor>
# 
# <Vblank>0.0870</Vblank>
# </FluoroWetlabECO_AFL_FL_Sensor>
# </sensor>

# <sensor Channel="11" >
# 
# <TurbidityMeter SensorID="67" >
# <SerialNumber>FLTURT-1013</SerialNumber>
# <CalibrationDate>2014 April 25</CalibrationDate>
# <ScaleFactor>0.080000</ScaleFactor>
# 
# <DarkVoltage>2.000000</DarkVoltage>
# </TurbidityMeter>
# </sensor>

# <sensor Channel="12" >
# 
# <AltimeterSensor SensorID="0" >
# <SerialNumber>PSA916-40852</SerialNumber>
# <CalibrationDate></CalibrationDate>
# <ScaleFactor>15.000</ScaleFactor>
# <Offset>0.000</Offset>
# </AltimeterSensor>
# </sensor>

# <sensor Channel="13" >
# 
# </sensor>

# <sensor Channel="14" >
# 
# </sensor>

# <sensor Channel="15" >
# 
# <SPAR_Sensor SensorID="51" >
# <SerialNumber>16500</SerialNumber>
# <CalibrationDate>March 28, 2013</CalibrationDate>
# <ConversionFactor>1641.85000000</ConversionFactor>
# <RatioMultiplier>1.00000000</RatioMultiplier>
# </SPAR_Sensor>
# </sensor>
# </Sensors>

# datcnv_date = Apr 25 2017 16:08:39, 7.23.2 [datcnv_vars = 16]
# datcnv_in = c:\data\ctd\at3712001.hex c:\data\ctd\at3712001.XMLCON
# datcnv_skipover = 0
# datcnv_ox_hysteresis_correction = yes

# wildedit_date = Apr 25 2017 16:08:50, 7.23.2
# wildedit_in = c:\data\ctd\process\at3712001.cnv
# wildedit_pass1_nstd = 2.0
# wildedit_pass2_nstd = 20.0
# wildedit_pass2_mindelta = 2.000e+000
# wildedit_npoint = 100
# wildedit_vars = longitude latitude prDM t090C t190C c0S/m c1S/m CStarTr0 flECO-AFL turbWETntu0 sbeox0V altM spar T2-T190C
# wildedit_excl_bad_scans = yes
# alignctd_date = Apr 25 2017 16:08:57, 7.23.2
# alignctd_in = c:\data\ctd\process\at3712001.cnv
# alignctd_adv = c0S/m 0.073, c1S/m 0.073, sbeox0V 2.000
# celltm_date = Apr 25 2017 16:09:07, 7.23.2
# celltm_in = c:\data\ctd\process\at3712001.cnv
# celltm_alpha = 0.0300, 0.0300
# celltm_tau = 7.0000, 7.0000
# celltm_temp_sensor_use_for_cond = primary, secondary
# Derive_date = Apr 25 2017 16:09:13, 7.23.2 [derive_vars = 9]
# Derive_in = c:\data\ctd\process\at3712001.cnv c:\data\ctd\process\at3712001.XMLCON
# derive_time_window_docdt = seconds: 2
# derive_ox_tau_correction = no
# derive_time_window_dzdt = seconds: 2
# binavg_date = Apr 25 2017 16:09:19, 7.23.2
# binavg_in = c:\data\ctd\process\at3712001.cnv
# binavg_bintype = meters
# binavg_binsize = 1
# binavg_excl_bad_scans = yes
# binavg_skipover = 0
# binavg_surface_bin = no, min = 1.000, max = 0.000, value = 0.000
# file_type = ascii

Further information on sensors:
sensor_channel,parameter,sensor_id,serial_number,instrument,calibration_date
1,Temperature_1,55,4303,nd,2016-01-20
2,Conductivity_1,3,3009,nd,2016-01-20
3,Pressure,45,0749,Digiquartz_with_TC,2014-04-08
4,Temperature_2,55,4360,nd,2016-01-20
5,Conductivity_2,3,2707,nd,2016-01-20
6,Oxygen,38,0072,SBE_43,2016-01-16
7,free,,,,
8,free,,,,
9,Transmissometer,71,CST-1117,WET_LabsCStar,20-May-15;_8-Mar-17
10,Fluorometer,20,FLTURT-1013,WetlabECO_AFL_FL_Sensor,2014-04-25
11,Turbidity,67,FLTURT-1013,WET_Labs,_ECO-NTU,2014-04-25
12,Altimeter,0,PSA916-40852,nd,
13,free,,,,
14,SPAR,,,Unavailable,
15,SPAR/Surface_Irradiance,50,16500,,2013-03-28

Data Processing Description

BCO-DMO made the following modifications:
- Changed parameter names to conform with BCO-DMO conventions.
- Added date_start, lat_start, lon_start, time_start_UTC and bottom depth from the summary information provided by the PI.

Data Files

File
ctd_AT37-12.csv (Comma Separated Values (.csv), 9.22 MB) MD5:8bb8368fa0e73243546e65de0907056c Primary data file for dataset ID 739098

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1559042

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT37-12	Dark Life II	2017-04-24	R/V Atlantis	Stefan M. Sievert (Chief Scientist)	data info

Instruments

CTD - profiler

Supplied Name: Sea-Bird SBE 9

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.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
station	station identifier	unitless	station
date_start_UTC	date [UTC] at start of cast formatted as yyyy-mm-dd	unitless	date
lat_start	cast start latitude; north is positive	decimal degrees	lat_start
lon_start	cast start longitude; east is positive	decimal degrees	lon_start
depth_bottom	depth of water	meters	depth_w
time_start_UTC	time [UTC] at start of cast formatted as HH:MM:SS	unitless	time_start
time_elapsed	Number of seconds elapsed from the start of the cast. Originally named 'timeS'.	seconds	time_elapsed
lon	latitude; north is positive. Originally named 'latitude'.	decimal degrees	lat
lat	longitude; east is positive. Originally named 'longitude'.	decimal degrees	lon
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_v
altitude	Altimeter reading. Originally named 'altM'.	meters	altitude
bottles_fired	Number of bottle fired. Originally named 'nbf'.	unitless	bottle
SPAR	SPAR/Surface Irradiance. Originally named 'spar'.	microEinsteins/meter^2/second	SPAR
temp_diff	Temperature Difference. Originally named 'T2-T190C'.	degrees Celsius	temp_diff
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_umol_L
descent_rate	Descent Rate. Originally named 'dz/dtM'.	meters/second [m/s]	descent_rate
flag	Quality flag; bad flag = -9.99e-29.	unitless	q_flag

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