Dataset: AT18-02_CTD

Name: CTD data from R/V Atlantis cruise AT18-02 in the Gulf of Mexico Macondo wellhead area in Nov-Dec 2010 (DWH_Deep_Microbes project)
Published: 2012-09-24
Keywords: oceans

Cite This Dataset

Spatial Extent: N:28.8525 E:-88.3097 S:27.3668 W:-90.5683

Temporal Extent: 2010-11-26 - 2010-12-02

Project:

RAPID Deepwater Horizon Oil Spill: Deep pelagic and benthic impacts of the oil spill (DWH_Deep_Microbes)

Program:

Gulf of Mexico - Deepwater Horizon Oil Spill (GoMX - DHOS)

Principal Investigator:

Samantha B. Joye (University of Georgia, UGA)

BCO-DMO Data Manager:

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

Version:

Version Date:

2012-09-24

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD data from R/V Atlantis cruise AT18-02 in the Gulf of Mexico Macondo wellhead area in Nov-Dec 2010 (DWH_Deep_Microbes project)

Abstract:

CTD data from R/V Atlantis cruise AT18-02 in the Gulf of Mexico Macondo wellhead area in Nov-Dec 2010.

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Description

CTD data from cruise AT18-02 in the Gulf of Mexico (November 26, 2010 to December 2, 2010).

Methods & Sampling

All CTD sensors were calibrated by U Miami or WHOI technicians prior to sailing except the CDOM sensor, which was obtained directly from WETLABS by collaborator V. Asper. That instrument was calibrated by Wetlabs. CTD casts in the vicinity of the Macondo Wellhead were complicated by the presence of oil on the sea surface. A saltwater hose was used to spray the sea surface, parting the oil to create a clean area for the CTD to be dropped through; a similar procedure was used for deployment and recovery.

Header information from Sea-Bird SBE 9 data files:
Software Version Seasave V 7.20f
Temperature SN = 4195; Conductivity SN = 2670
Number of Bytes Per Scan = 37; Number of Voltage Words = 4
Number of Scans Averaged by the Deck Unit = 1
units = specified

Station 9 (casts 19 and 20):
name 0 = latitude: Latitude [deg]
name 1 = longitude: Longitude [deg]
name 2 = timeS: Time, Elapsed [seconds]
name 3 = prDM: Pressure, Digiquartz [db]
name 4 = depSM: Depth [salt water, m]
name 5 = t090C: Temperature [ITS-90, deg C]
name 6 = t190C: Temperature, 2 [ITS-90, deg C]
name 7 = c0S/m: Conductivity [S/m]
name 8 = c1S/m: Conductivity, 2 [S/m]
name 9 = sal00: Salinity, Practical [PSU]
name 10 = sal11: Salinity, Practical, 2 [PSU]
name 11 = density00: Density [density, Kg/m^3]
name 12 = density11: Density, 2 [density, Kg/m^3]
name 13 = avgsvCM: Average Sound Velocity [Chen-Millero, m/s]
name 14 = sbeox0V: Oxygen raw, SBE 43 [V]
name 15 = sbeox0Mm/Kg: Oxygen, SBE 43 [umol/Kg]
name 16 = oxsatMm/Kg: Oxygen Saturation, Weiss [umol/Kg]
name 17 = xmiss: Beam Transmission, Chelsea/Seatech/WET Labs CStar [%]
name 18 = potemp090C: Potential Temperature [ITS-90, deg C]
name 19 = potemp190C: Potential Temperature, 2 [ITS-90, deg C]
name 20 = flECO-AFL: Fluorescence, WET Labs ECO-AFL/FL [mg/m^3]
name 21 = turbWETntu0: Turbidity, WET Labs ECO [NTU]
name 22 = wetCDOM: Fluorescence, WET Labs CDOM [mg/m^3]
name 23 = flCUVA: Fluorescence, Chelsea UV Aquatracka [ug/l]
name 24 = flScufa: Fluorescence, Turner SCUFA [ppb]
name 25 = altM: Altimeter [m]
name 26 = nbf: Bottles Fired
name 27 = modError: Modulo Error Count
interval = decibars: 1; bad_flag = -9.990e-29; Sensors count=13

Cast 21:
name 0 = scan: Scan Count
name 1 = latitude: Latitude [deg]
name 2 = longitude: Longitude [deg]
name 3 = nbf: Bottles Fired
name 4 = depSM: Depth [salt water, m]
name 5 = t090C: Temperature [ITS-90, deg C]
name 6 = t190C: Temperature, 2 [ITS-90, deg C]
name 7 = sal00: Salinity, Practical [PSU]
name 8 = sal11: Salinity, Practical, 2 [PSU]
name 9 = sbeox0Mg/L: Oxygen, SBE 43 [mg/l]
name 10 = sbeox0PS: Oxygen, SBE 43 [% saturation]
name 11 = density00: Density [density, Kg/m^3]
name 12 = sigma-é00: Density [sigma-theta, Kg/m^3]
name 13 = bat: Beam Attenuation, Chelsea/Seatech/WET Labs CStar [1/m]
name 14 = xmiss: Beam Transmission, Chelsea/Seatech/WET Labs CStar [%]
name 15 = flECO-AFL: Fluorescence, WET Labs ECO-AFL/FL [mg/m^3]
name 16 = wetCDOM: Fluorescence, WET Labs CDOM [mg/m^3]
name 17 = flCUVA: Fluorescence, Chelsea UV Aquatracka [ug/l]
name 18 = prDM: Pressure, Digiquartz [db]
name 19 = turbWETntu0: Turbidity, WET Labs ECO [NTU]
name 20 = flag: 0.000e+00
interval = seconds: 0.0416667; bad_flag = -9.990e-29; Sensors count=13

Casts 22 through 26:
name 0 = scan: Scan Count
name 1 = latitude: Latitude [deg]
name 2 = longitude: Longitude [deg]
name 3 = t190C: Temperature, 2 [ITS-90, deg C]
name 4 = t090C: Temperature [ITS-90, deg C]
name 5 = sal00: Salinity, Practical [PSU]
name 6 = sal11: Salinity, Practical, 2 [PSU]
name 7 = potemp090C: Potential Temperature [ITS-90, deg C]
name 8 = depSM: Depth [salt water, m]
name 9 = c0S/m: Conductivity [S/m]
name 10 = bat: Beam Attenuation, Chelsea/Seatech/WET Labs CStar [1/m]
name 11 = xmiss: Beam Transmission, Chelsea/Seatech/WET Labs CStar [%]
name 12 = nbf: Bottles Fired
name 13 = density00: Density [density, Kg/m^3]
name 14 = sigma-é00: Density [sigma-theta, Kg/m^3]
name 15 = flECO-AFL: Fluorescence, WET Labs ECO-AFL/FL [mg/m^3]
name 16 = wetCDOM: Fluorescence, WET Labs CDOM [mg/m^3]
name 17 = flCUVA: Fluorescence, Chelsea UV Aquatracka [ug/l]
name 18 = sbeox0Mg/L: Oxygen, SBE 43 [mg/l]
name 19 = sbeox0PS: Oxygen, SBE 43 [% saturation]
name 20 = prDM: Pressure, Digiquartz [db]
name 21 = flag: 0.000e+00
interval = seconds: 0.0416667; bad_flag = -9.990e-29; Sensors count=13

sensor channel 1 = Frequency 0, Temperature; Sensor ID: 55; SerialNumber: 4195
Calibration Date: 23-Jan-10

sensor channel 2 = Frequency 1, Conductivity; Sensor ID: 3; Serial Number: 2670
Calibration Date: 12-Jan-10

sensor channel 3 = Frequency 2, Pressure, Digiquartz with TC; Sensor ID: 45; Serial Number: 63505 SBE090462
Calibration Date: 12/23/2002

sensor channel 4 = Frequency 3, Temperature, 2; Sensor ID: 55; Serial Number: 4481
Calibration Date: 12-Jan-10

sensor channel 5 = Frequency 4, Conductivity, 2; Sensor ID: 3; Serial Number: 2880
Calibration Date: 12-Jan-10

sensor channel 6 = A/D voltage 0, Fluorometer, WET Labs ECO-AFL/FL; Sensor ID: 20 SerialNumber: FLNTURTD-FL-1012
Calibration Date: 2008-04-18

sensor channel 7 = A/D voltage 1, Turbidity Meter, WET Labs, ECO-NTU; Sensor ID: 67; Serial Number: FLNTURTD-1012
Calibration Date: 2008-04-18

sensor channel 8 = A/D voltage 2, Fluorometer, WET Labs CDOM; Sensor ID: 19; Serial Number: FLCDRTD-1379
Calibration Date: 4/14/2010

sensor channel 9 = A/D voltage 3, Fluorometer, Turner SCUFA; Sensor ID: 17; Serial Number: 201011
Calibration Date: 2010-Aug-18

sensor channel 10 = A/D voltage 4, Altimeter; Sensor ID: 0; Serial Number PSA916-1162
Calibration Date: (blank)

sensor channel 11 = A/D voltage 5, Oxygen, SBE 43; Sensor ID: 38; Serial Number: 0723
Calibration Date: 12-Feb-10

sensor channel 12 = A/D voltage 6, Transmissometer, Chelsea/Seatech/WET Lab CStar; Sensor ID: 59 Serial Number: CST-1118DR
Calibration Date: 2008-04-30

sensor channel 13 = A/D voltage 7, Fluorometer, Chelsea UV Aquatracka; Sensor ID: 7; Serial Number: 107733001
Calibration Date: 2010-8-18
----

Data Processing Description

The CTD data were processed on Seasave software version 7.20f as per routine operating procedures.

BCO-DMO made the following modifications:
- Removed duplicate parameters from display.
- Changed parameter names to conform with BCO-DMO conventions.
- Added date_start_utc, time_start_utc, lat_start, and lon_start from the header information in the original CTD files.
- Files named '12.04' were assumed to be be '12.05', based on the event log.

Data Files

File
AT18-02_CTD.csv (Comma Separated Values (.csv), 190.70 MB) MD5:0c87bdf6d3d1d49bde12cf48dfbea984 Primary data file for dataset ID 3728

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1043225

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT18-02		2010-11-08	R/V Atlantis	Samantha B. Joye (Chief Scientist)	data info

Instruments

CTD Sea-Bird 9

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird 9

Acronym: CTD SBE 9

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

Generic Description:

The Sea-Bird SBE 9 is a type of CTD instrument package. The SBE 9 is the Underwater Unit and is most often combined with the SBE 11 Deck Unit (for real-time readout using conductive wire) when deployed from a research 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, fluorometer, altimeter, etc.). Note that in most cases, it is more accurate to specify SBE 911 than SBE 9 since it is likely a SBE 11 deck unit was used. more information from Sea-Bird Electronics

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cast	Consecutive cast number of the instrument.	unitless	cast
event	Unique event number. The first one or two digits (before the decimal) are the station number.	unitless	event
date_start_utc	Date at start of CTD cast; UTC. format: mm/dd/YYYY	unitless	date_begin
time_start_utc	Time at start of CTD cast; 24-hour clock; UTC; in hours and decimal minutes. format: HHMM.mm	unitless	time_start
lat_start	Latitude at start of cast; postive values = North.	decimal degrees	lat_start
lon_start	Longitude at start of cast; negative values = West.	decimal degrees	lon_start
lat	Latitude; postive values = North.	decimal degrees	lat
lon	Longitude; negative values = West.	decimal degrees	lon
time_elapsed	Number of seconds elapsed from the start of the cast. Originally named 'timeS'.	seconds	time_elapsed
press	Pressure. Originally named 'prDM'.	decibars	press
depth	Depth. Originally named 'depSM'.	meters	depth
temp	Primary temperature measurement. Originally named 'T090C'.	degrees Celsius	temp
temp2	Secondary tempearture measurement. Originally named 'T190C'.	degrees Celsius	temp2
cond	Primary conductivity measurement in Siemens per meter. Originally named 'c0S/m'.	S/m	cond
cond2	Primary conductivity measurement in Siemens per meter. Originally named 'c1S/m'.	S/m	cond2
sal	Primary salinity measurement. Originally named 'Sal00'.	PSU	sal
sal2	Secondary salinity measurement. Originally named 'Sal11'.	PSU	sal2
density	Primary measure of density in kilograms per cubic meter.	kg/m^3	density
density2	Secondary measure of density in kilograms per cubic meter.	kg/m^3	density
sigma_0	Sigma theta density. Orignally named 'Sigma-e00'.	kg/m^3	sigma_0
O2_sat_pcnt	Percent oxygen saturation. Originally named 'Sbeox0PS'.	%	O2_sat_pcnt
O2_v	Raw voltage from SBE43 oxygen sensor. Originally named 'Sbeox0V'.	volts	O2_v
O2_mg_L	Oxygen in milligrams per liter. Originally named 'Sbeox0Mg/L'.	mg/L	O2_mg_L
O2_umol_kg_SBE	Oxygen in micromoles per kilograms measured by SBE43 sensor. Originally named 'Sbeox0Mm/Kg'.	umol/kg	O2_umol_kg
O2_umol_kg_W	Oxygen in micromoles per kilograms measured by Weiss sensor. Originally named 'oxsatMm/Kg'.	umol/kg	O2_umol_kg
trans	Beam transmission. Originally named 'Xmiss'.	%	trans
beam_c	Beam attenuation. Originally named 'Bat'.	1/m	beam_c
potemp	Primary measure of potential temperature. Originally named 'potemp090C'.	degrees Celsius	potemp
potemp2	Secondary measure of potential temperature. Originally named 'potemp190C'.	degrees Celsius	potemp2
fluor_ug_L	Fluorescence measured by WET Labs ECO-AFL/FL in milligrams per cubic meter. Originally named 'flECO-AFL'.	mg/m^3	fluor
turbidity	Turbidity measured by WET Labs ECO. Originally named 'turbWetntu0'.	NTU	turbidity
CDOM	CDOM fluoresence in milligrams per cubic meter. Originally named 'wetCDOM'.	mg/m^3	CDOM
chl_a_fluor	Fluorescence measured by Chelsea UV Aquatracka in micrograms per liter. Originally named 'flCUVA'.	ug/L	chl_a_fluor
fluor_ppb	Fluorescence measured by Turner SCUFA in parts per billion. Originally named 'flScufa'.	ppb	no_bcodmo_term
alt	Altimeter reading.	meters	altitude
sound_vel_avg	Average sound velocity in meters per second. Originally named 'avgsvCM'.	m/s	sound_vel
bottles_fired	Number of bottle fired.	unitless	no_bcodmo_term
error_count	Modulo error count.	unitless	no_bcodmo_term

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Dataset: AT18-02_CTD