Dataset: WS1010_CTD

Name: CTD data from R/V F.G. Walton Smith cruise WS1010 in the Gulf of Mexico Macondo wellhead area in May-June 2010 (DWH_Deep_Microbes project)
Published: 2012-09-24
Keywords: oceans

Cite This Dataset

Spatial Extent: N:28.827 E:-88.327 S:28.63 W:-88.813

Temporal Extent: 2010-05-26 - 2010-06-06

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 F.G. Walton Smith cruise WS1010 in the Gulf of Mexico Macondo wellhead area in May-June 2010 (DWH_Deep_Microbes project)

Abstract:

CTD data from R/V F.G. Walton Smith cruise WS1010 in the Gulf of Mexico Macondo wellhead area in May-June 2010.

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Description

CTD data from cruise WS1010 in the Gulf of Mexico (May 26, 2010 to June 6, 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.

Note: There is no cast number 78.

Data Processing Description

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

BCO-DMO made the following modifications:
- Replaced blanks and values of '99999' with 'nd' to indicate 'no data'.
- Separated original date/time field into separte columns.
- Changed parameter names to conform to BCO-DMO conventions.
- Added date_start_utc, time_start_utc, lat_start, and lon_start from the WS1010 event log.

Data Files

File
WS1010_CTD.csv (Comma Separated Values (.csv), 679.00 MB) MD5:be11b80040f5f55ed26a91e9e83c9878 Primary data file for dataset ID 3729

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
WS1010		2010-05-21	R/V F.G. Walton Smith	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. First two digits are the station number. The two digits after the decimal are the cast number at that station.	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: HH: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
time_utc	Time; UTC; 24-hour clock; in hours and decimal minutes. format: HHMM.mm	unitless	time_utc
day_utc	2-digit day (dd) of month; UTC.	dd (01 to 31)	day_utc
month_utc	2-digit month (mm) of year; UTC.	mm (01 to 12)	month_utc
year	4-digit year.	YYYY	year
lat	Latitude; postive values = North.	decimal degrees	lat
lon	Longitude; negative values = West.	decimal degrees	lon
alt	Altimeter reading.	meters	altitude
press	Pressure.	decibars	press
depth	Depth.	meters	depth
temp	Temperature from primary sensor.	degrees Celsius	temp
temp2	Temperature from secondary sensor.	degrees Celsius	temp2
cond	Conductivity from primary sensor.	S/m	cond
cond2	Conductivity from secondary sensor.	S/m	cond2
sal	Salinity from primary sensor.	PSU	sal
sal2	Salinity from secondary sensor.	PSU	sal2
density	Density in kilograms per cubic meter.	kg/m^3	density
flag_density	Density quality flag.	unitless	flag
sigma_t	Sigma-t density in kilograms per cubic meter.	kg/m^3	sigma_t
O2_mg_L	Oxygen in milligrams per liter.	mg/L	O2_mg_L
O2_sat_pcnt	Percent oxygen saturation.	%	O2_sat_pcnt
trans	Percent beam transmission. Originally named 'Beam_Attenuation_Pct'.	%	trans
beam_c	Beam attenuation.	1/m	beam_c
chl_a_fluor	Chlorophyll fluorescence in micrograms per liter.	ug/L	chl_a_fluor
CDOM	CDOM in milligrams per cubic meter.	mg/m^3	CDOM
PAR	PAR in micro Einsteins per square meter.	uE/m^2	PAR
PAR_depth	PAR depth.	meters	no_bcodmo_term
PAR_pcnt	Percent PAR.	%	no_bcodmo_term
SPAR	Surface PAR in micro Einsteins per square meter.	uE/m^2	SPAR

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Dataset: WS1010_CTD