Dataset: CTD - Profiles
Deployment: AT11-17

CTD Profile Data

Principal Investigator:

Barbara M. Hickey (University of Washington, UW)

Contact:

Nancy Kachel (University of Washington, UW)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI)

Project:

ECOHAB - Pacific Northwest (ECOHAB-PNW)

Current State:

Final no updates expected

Version:

17 August 2010

Deployment Synonyms:

ECOHAB_3, EH3, ECOHAB/PNW3, AN1117, an1117, At1117

Version Date:

2010-08-17

Data URL:

https://www.bco-dmo.org/dataset-deployment/452817/data

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Description

Final processed CTD data for the cruises associated with the ECOHAB-PNW Project.

Methods & Sampling

Dataset acquisition description

Refer to individual platform deployments for details on instrumentation and data aquisition.

Deployment-specific acquisition description

The data were collected using the Atlantis' SBE911+ system with dual Temperature and conductivity

sensors, a Wetlab ECO-AFL/FL fluorometer sensor, Biospherical Instruments/LICOR PAR (Irradiance)

sensor, and a Sea Bird SBE043 dissolved oxygen sensor.

Link to NODC Data Form 24-13 for Atlantis cruise number AT11-17 CTD Data Submission

File: an1117_con_rept.txt

Date: 11/30/2008
Instrument configuration file: F:confilesAN1117ctd018.con
Configuration report for SBE 911plus/917plus CTD
------------------------------------------------
Frequency channels suppressed : 0
Voltage words suppressed      : 0
Computer interface            : RS-232C
Scans to average              : 1
Surface PAR voltage added     : Yes
NMEA position data added      : Yes
Scan time added               : No

1) Frequency 0, Temperature
   Serial number : 2446
   Calibrated on : 5-11-04
   G             : 4.37266086e-003
   H             : 6.48722827e-004
   I             : 2.40891324e-005
   J             : 2.26701934e-006
   F0            : 1000.000
   Slope         : 1.00000000
   Offset        : 0.0000

2) Frequency 1, Conductivity
   Serial number : 2148
   Calibrated on : 5-11-04
   G             : -1.04026033e+001
   H             : 1.41916517e+000
   I             : 5.54106781e-004
   J             : 3.32324209e-005
   CTcor         : 3.2500e-006
   CPcor         : -9.57000000e-008
   Slope         : 1.00000000
   Offset        : 0.00000

3) Frequency 2, Pressure, Digiquartz with TC
   Serial number : 58939
   Calibrated on : 30 apr 2001
   C1            : -4.928049e+004
   C2            : -5.591409e-001
   C3            : 1.510530e-002
   D1            : 3.994470e-002
   D2            : 0.000000e+000
   T1            : 3.017493e+001
   T2            : -4.671701e-004
   T3            : 3.967900e-006
   T4            : 3.098920e-009
   T5            : 0.000000e+000
   Slope         : 1.00000000
   Offset        : 0.00000
   AD590M        : 1.135000e-002
   AD590B        : -8.132450e+000

4) Frequency 3, Temperature, 2
   Serial number : 2265
   Calibrated on : 11-May-04
   G             : 4.33190889e-003
   H             : 6.44107823e-004
   I             : 2.37558645e-005
   J             : 2.26964688e-006
   F0            : 1000.000
   Slope         : 1.00000000
   Offset        : 0.0000

5) Frequency 4, Conductivity, 2
   Serial number : 2077
   Calibrated on : 16-July-04
   G             : -1.02565600e+001
   H             : 1.47987624e+000
   I             : -5.25035158e-003
   J             : 4.81904318e-004
   CTcor         : 3.2500e-006
   CPcor         : -9.57000000e-008
   Slope         : 1.00000000
   Offset        : 0.00000

6) A/D voltage 0, Fluorometer, Wetlab ECO-AFL/FL
   Serial number : 008
   Calibrated on : 9-21-01
   Vblank        : 0.0000
   Scale factor  : 1.00000000e+000

7) A/D voltage 1, Free

8) A/D voltage 2, PAR/Irradiance, Biospherical/Licor
   Serial number        : 4617
   Calibrated on        : 
   M                    : 1.00000000
   B                    : 0.00000000
   Calibration constant : 2000000000.00000000
   Multiplier           : 1.00000000
   Offset               : -0.74800000

9) A/D voltage 3, Transmissometer, Chelsea/Seatech/Wetlab CStar
   Serial number : CST-536DR
   Calibrated on : 4-30-2002
   M             : 20.6156
   B             : 1.1514
   Path length   : 0.250

10) A/D voltage 4, Oxygen, SBE 43
    Serial number : 0712
    Calibrated on : 7-6-04
    Equation      : Owens-Millard
    Coefficients for Owens-Millard: 
    Soc           : 3.3380e-001
    Boc           : 0.0000
    Offset        : -0.5126
    Tcor          : 0.0020
    Pcor          : 1.35e-004
    Tau           : 0.0
    Coefficients for Murphy-Larson: 
    Soc           : 0.00000e+000
    Offset        : 0.00000e+000
    A             : 0.00000e+000
    B             : 0.00000e+000
    C             : 0.00000e+000
    E             : 0.00000e+000
    Tau           : 0.00000e+000

11) A/D voltage 5, Free

12) A/D voltage 6, Altimeter
    Serial number : 
    Calibrated on : 
    Scale factor  : 14.715
    Offset        : 0.000

13) A/D voltage 7, OBS, Seapoint Turbidity
    Serial number : 
    Calibrated on : 
    Gain setting  : 100 x
    Scale factor  : 1.000

14) SPAR voltage, Unavailable

15) SPAR voltage, SPAR/Surface Irradiance
    Serial number     : 
    Calibrated on     : 
    Conversion factor : 1.00000000
    Ratio multiplier  : 1.00000000

Data Processing Description

Dataset Processing Description

Refer to individual platform deployments for details on CTD data processing.

Deployment-specific processing description

The data were initially processed aboard ship using SeaBird's processing with their standard, 
recommended parameters. The procedure used for quality control and calibration post processing 
follows that developed at NOAA's Pacific Marine Environmental Laboratory in the Eco-FOCI 
(Fisheries and Oceanography coordinated Investigations. Each cast was then inspected for 
reasonableness and for spikes using the criterion that for 1-m bin data, sigma-t inversions 
> 0.02 were unacceptable. Temperature or conductivity values causing such inversions were 
removed and the result data gaps were linearly interpolated. 
 
Due to the Atlantis' method for conducting CTD deployment during the first 135 casts, many 
values for variables (T, Sal, Fluorescence, Oxygen) at the top of the profiles needed to be 
discarded in the top few meters. The ship's method was to turn the CTD on while the instruments 
were on deck. On some of those casts, significant spiking to 15-18m occurred. After cast 135 
a better methodology for conducting CTD casts was instated. This procedure involves taking the 
CTD to 10m, then the pump is tuned on. After 1-2 minutes the CTD is brought to the surface and 
the cast is begun. Using his method resulted in a big improvement in the quality of near surface 
measurements. 
 
Water samples, taken approximately every third station, were taken to calibrate salinity. The 
results were compared to data measured by the CTD sensor to determine the offset of the CTD data. 
After the salinity calibration was applied, densities, and dynamic heights were recalculated.

<a href="http://bcodata.whoi.edu/ECOHAB_PNW/NODC_DataDocForm_EH3b.pdf">Link to NODC Data Form 24-13 for Atlantis cruise number AT11-17 CTD Data Submission</a>

BCO-DMO Processing/Edits 
 Original ".txt" file imported into spreadsheet 
 ECOHAB-PNW master cruise id added to dataset for compatibility with other ECOHAB-PNW datasets 
Supplied cruise parameter retained as CruiseId_CTD 
 Additional parameters added for overall standardization between ECOHAB-PNW CTD datasets 
These parameters have "nd" (no data) entered for values 
» Parameter names modified to conform to BCO-DMO convention 
Some renamed to BCO-DMO standard (date, time, lat, lon) 
Spaces removed or replaced with underscores 
Duplicate parameter names individualized 
Parameter units removed from names 
 Single Date/Time parameter split into two parameters (date and time) 
date reformatted to YYYYMMDD 
time reformatted to HHMMSS 
 Longitude converted signed for West longitude (negative) by subtracting 360.0 from supplied value 
 Data values padded with decimal places as appropriate 
 Error values changed to BCO-DMO standard of "nd" 
"9999" changed to "nd" 
"-1.00E+10" changed to "nd"

More information about this dataset deployment

Funding

Award Number	Funding Source
NA170P2789	National Oceanic and Atmospheric Administration
OCE-0234587	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird 911

Supplied Name: CTD Seabird 911

Supplied Description:

W0306A, W0308C

The data were collected using the Wecoma's SBE911+ system

with dual Temperature and Conductivity sensors,

a SeaTech fluorometer sensor,

Biospherical Instruments/LICOR PAR (Irradiance) sensor,

and a Sea Bird SBE043 dissolved oxygen sensor.

AT11-17, AT11-50

The data were collected using the Atlantis' SBE911+ system

with dual Temperature and conductivity sensors,

a Wetlab ECO-AFL/FL fluorometer sensor,

Biospherical Instruments/LICOR PAR (Irradiance) sensor,

and a Sea Bird SBE043 dissolved oxygen sensor

TUIM14MV

The data were collected using the Melville's SBE911+ system

with dual Temperature and conductivity sensors,

a Chelsea/Seatech/Wetlabs CStar fluorometer sensor,

Chelsea/Wetlabs Transmissometer,

Biospherical Instruments/LICOR PAR (Irradiance) sensor,

and a Sea Bird SBE043 dissolved oxygen sensor.

TN200

The data was collected using the Thompson's SBE911+ system

with dual Temp and conductivity sensors,

a Wetlab ECO-AFL/FL Fluorometer,

WetLabs CSTAR transmissometer,

Biospherical Instruments/LICOR PAR (Irradiance) sensor,

and a Sea Bird SBE043 dissolved oxygen sensor.

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

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

LI-COR Biospherical PAR Sensor

Supplied Description:

Biospherical Instruments 4-pi light intensity sensor (PAR)

Instrument Type

Generic Name: LI-COR Biospherical PAR Sensor

Acronym: LI-COR Biospherical PAR

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0074/

Generic Description:

The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.

Sea Tech Fluorometer

Supplied Description:

Sea Tech/Wetlabs FLF fluorometer (chlorophyll)

Instrument Type

Generic Name: Sea Tech Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

The Sea Tech chlorophyll-a fluorometer has internally selectable settings to adjust for different ranges of chlorophyll concentration, and is designed to measure chlorophyll-a fluorescence in situ. The instrument is stable with time and temperature and uses specially selected optical filters enabling accurate measurements of chlorophyll a. It can be deployed in moored or profiling mode. This instrument designation is used when specific make and model are not known. The Sea Tech Fluorometer was manufactured by Sea Tech, Inc. (Corvalis, OR, USA).

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43 Dissolved Oxygen Sensor

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic Description:

The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Wet Labs ECO-AFL/FL Fluorometer

Supplied Description:

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 CSTAR Transmissometer

Supplied Description:

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

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	RISE Project Cruise Id	text	cruise_id
CruiseID_CTD	RISE CTD Data Specific Cruise Id	text	cruise_id
station	Cast	integer	station
type	Station Type	text	station_desc
date	Date (GMT)	YYYYMMDD	date
time	Time (GMT)	HHMMSS	time
lon	longitude (West is negative)	Decimal degrees	lon
lat	latitude (South is negative)	Decimal degrees	lat
depth_bot	Bottom Depth	meters	depth_bottom
PRESSURE	Pressure	decibars	press
TEMPERATURE	Temperature (Primary)	degrees celsius	temp
TEMPERATURE2	Secondary Temperature	degrees celsius	temp
fluorometer_raw	rFv = raw Fluorometer volts	volts	fluor
Chlorophyll_A	Chlorophyll-A = Sea Tech/Wetlabs FLF Fluorometer measuremen	ugrams/l	chl_a
Transmissometry	Transmission (light) Percent per meter	percentage	trans
OXYGEN_ml	O= Dissolved Oxygen concentration from SeaBird SBE43 oxygen sensor; uncorrected by sampling.	ml/l	O2
OXYGEN_umol	O= Dissolved Oxygen concentration from SeaBird SBE43 oxygen sensor; uncorrected by sampling.	umol/kg	O2
PAR	PAR = Irradiance; Photosynthetically Activated Radiation (a measure of light intensity)	uEin m-2 s-1	PAR
SALINITY	Salinity (Primary) (corrected)	PSU	sal
SALINITY2	Secondary Salinity (corrected)	PSU	sal
TEMP_POTENTIAL	Potential Temperature (PT) calculated from T and pressure	degrees celsius	potemp
SIGMA_T	density; sigma-t calculated from salinity; T1; Sal1 and pressure)	kg m-3	sigma_t
SIGMA_THETA	density; sigma-t calculated from salinity; T1; Sal1 and pressure)	kg m-3	sigma_t
DYNAMIC_METERS	Dynamic Height (Dyn-m)	Dyn-m	no_bcodmo_term
Attenuation	(Beam) Attenuation (light)	m-1	beam_cp

Database

Contribute Data

Dataset: CTD - Profiles
Deployment: AT11-17

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Database

Contribute Data

Dataset: CTD - ProfilesDeployment: AT11-17

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Deployment-specific processing description

Dataset: CTD - Profiles
Deployment: AT11-17