CTD data from the Cruise CD-ROMS on ARSV Laurence M. Gould (LMG0201A, LMG0203, LMG0205, LMG0302, LMG0104) in the Southern Ocean from 2001-2003 (SOGLOBEC project)

Website: https://www.bco-dmo.org/dataset/2361
Version: revisited - improved
Version Date: 2011-04-07

Project
» U.S. GLOBEC Southern Ocean (SOGLOBEC)

Program
» U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)
ContributorsAffiliationRole
Fritsen, Chris H.Desert Research Institute (DRI)Principal Investigator
Allison, DickyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager
Groman, Robert C.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Coverage

Spatial Extent: N:-65.1047 E:-64.259 S:-69.8882 W:-76.1657

Dataset Description

Sea-Bird CTD Data Files

These CTD data files were collected on most cruises. The raw and processed data were placed on CD-ROMs, usually in zipped and/or tar'ed form, and provided to the participants and the Data Management Office. The "asc" versions of the files are served, using the information collected from the "hdr" files. These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.

If a cruise is not represented here, there were no ascii files available to serve (lmg0103, lmg0106), or they have been post-processed and re-served (nbp0103, nbp0104, nbp0202, and nbp0204).

See related datasets: ctd_JK_one_meter and ctd_JK_std_depth

 

 

Questions concerning this data set should be directed to:
Bob Groman
Globec Data Management Office
Woods Hole Oceanographic Institution
Woods Hole, MA 02543
Phone: 508 289 2409
E-mail: rgroman@whoi.edu

Last updated February 24, 2006


Acquisition Description

Sea-Bird CTD Data Files.


Processing Description

These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.


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Parameters

ParameterDescriptionUnits
cruiseid Cruise identification
cast cast identification (numeric/alpha numeric)
year year, four digit YYYY
month_utcmonth of year MM
day_utcday of month DD
time_utctime of day, 24 hour clock HHmm.m
lat Latitude, negative = South DD.D
lon Longitude, negative = West DDD.D
station Station number or description
event Event number a unique station identifier
operator Name of CTD operator
scan Scan count
time_elapsed Elapsed time seconds
press Pressure decibars
temp Water temperature, primary temp sensor, ITS-90 deg. C
cond Conductivity, primary conductivity sensor siemens/meter
temp2 Temperature, from secondary sensor. ITS-90 deg. C
cond2 Conductivity, from secondary sensor siemens/meter
Sbeox0VOxygen Voltage, primary sensor SBE 43 volts
Sbeox1VOxygen Voltage, secondary sensor SBE 43 volts
wetBTrans WET Labs, beam transmission percent
V0Voltage channel 0 volts
V2Voltage channel 2 volts
V4Voltage channel 4 volts
V5Voltage channel 5 volts
V6Voltage channel 6 volts
trans Beam (light) Transmission, Chelsea/Seatech/Wetlab CStar percent
fluor Fluorescence, Chelsea Aqua 3 ug/l
ParPAR/Irradiance, Biospherical/Licor
SPAR Surface Irradiance (PAR), (downwelled Photosynthetically Available Radiation)
sbe_o2 dissolved oxygen, SBE 43 unit, calculated from primary sensors, ml/l
sbe_o2_2 dissolved oxygen, SBE 43 unit, calculated from secondary sensors, ml/l
o2 dissolved Oxygen ml/l
oxC Oxygen, current volts
oxT Oxygen sensor temperature deg.C
O2sat Oxygen saturation ml/l
oxPS Oxygen percent saturation percent
potemp Potential temperature, ITS-90, calculated from primary sensors deg. C
sal Salinity, calculated from primary temp. and cond. sensors PSU
potemp2 Potential Temperature, calculated from secondary sensors, ITS-90 deg. C
sal2 Salinity, calculated from secondary temp. and cond. sensors PSU
sigma_t Density, calculated from primary temp. and cond. sensors kg/m3
sigma_t2 Density, calculated from secondary temp. and cond. sensors kg/m3
sound_vel Sound Velocity meters/sec
depth depth of sample/observation meters
Flagflag
cond_mSConductivity of seawater measured in milliSiemans/centimeter by the primary sensor. mS/cm


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Instruments

Dataset-specific Instrument Name
Conductivity, Temperature, Depth
Generic Instrument Name
CTD profiler
Dataset-specific Description
CTD measurements taken, CTD unit unidentified, Sea-Bird CTD
Generic Instrument 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 and permits scientists observe the physical properties in real time via a conducting cable connecting the CTD to a deck unit and computer on the 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 instrument designation is used when specific make and model are not known.


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Deployments

LMG0201A

Website
Platform
ARSV Laurence M. Gould
Report
Start Date
2002-02-06
End Date
2002-03-03
Description
Acquisition Description
Sea-Bird CTD Data Files.

Processing Description
These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.

LMG0203

Website
Platform
ARSV Laurence M. Gould
Report
Start Date
2002-04-07
End Date
2002-05-20
Description
Acquisition Description
Sea-Bird CTD Data Files.

Processing Description
These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.

LMG0205

Website
Platform
ARSV Laurence M. Gould
Report
Start Date
2002-07-29
End Date
2002-09-18
Description
Acquisition Description
Sea-Bird CTD Data Files.

Processing Description
These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.

LMG0302

Website
Platform
ARSV Laurence M. Gould
Report
Start Date
2003-02-13
End Date
2003-03-07
Description
Acquisition Description
Sea-Bird CTD Data Files.

Processing Description
These files have been shipboard processed using standard SeaBird software to one decibar averaged intervals.

LMG0104

Website
Platform
ARSV Laurence M. Gould
Report
Start Date
2001-04-20
End Date
2001-06-05
Description
Processing Description
Data Manager notes:  Serving these data became data rescue, not just data serving. These CTD data were processed aboard the Gould and distributed on the cruise CDs.  The were in a different directory on the CD from other Gould and Palmer cruises, so they were missed in the first automated serving of data.  In order for the program to find them and pick them for serving, they were transfered to a different directory ('ocean/ctd') and renamed (a 'd' was added to the CTD name [meaning downcast] and they were switched to lower case.). When looking at the data, it was determined that the units for the conductivity sensors were different from other Gould and Palmer cruises, so additional parameters were added to the final data listing.  Since mS/cm and S/m are not interchangeable, an additional parameter, cond_alt, was employed for the mS/cm data.


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Project Information

U.S. GLOBEC Southern Ocean (SOGLOBEC)


Coverage: Southern Ocean


The fundamental objectives of United States Global Ocean Ecosystems Dynamics (U.S. GLOBEC) Program are dependent upon the cooperation of scientists from several disciplines. Physicists, biologists, and chemists must make use of data collected during U.S. GLOBEC field programs to further our understanding of the interplay of physics, biology, and chemistry. Our objectives require quantitative analysis of interdisciplinary data sets and, therefore, data must be exchanged between researchers. To extract the full scientific value, data must be made available to the scientific community on a timely basis.



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Program Information

U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)


Coverage: Global


U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.

The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).



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Funding

Funding SourceAward
NSF Antarctic Sciences (NSF ANT)

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