Dataset: CTD profiles

Name: CTD profiles from R/V Point Sur cruise PS1312 off the Central California Coast from June to July of 2013 (Diatom Group Si Prod project)
Published: 2017-08-30
Keywords: oceans

Cite This Dataset

Spatial Extent: N:38.26483 E:-121.969 S:36.448 W:-123.977

Temporal Extent: 2013-06-27 - 2013-07-05

Project:

Group-Specific Diatom Silica Production in a Coastal Upwelling System (Diatom Group Si Prod)

Principal Investigator:

Jeffrey W. Krause (Dauphin Island Sea Lab, DISL)

Scientist:

Mark A. Brzezinski (University of California-Santa Barbara, UCSB)

Contact:

Jeffrey W. Krause (Dauphin Island Sea Lab, DISL)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2017-08-30

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD profiles from R/V Point Sur cruise PS1312 off the Central California Coast from June to July of 2013 (Diatom Group Si Prod project)

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Description

This dataset includes temperature, salinity, pressure, depth, sigma-theta density, PAR, fluorescence, and dissolved oxygen from CTD profiles collected during the R/V Point Sur cruise PS13-12 between 2013-06-27 2013-07-05.

The data are available by clicking the "Get Data" button on this page.

Original .asc files submitted to BCO-DMO are available for download as a zip file:
CTD profile .asc files (268 KB ZIP, 914 KB uncompressed)
* The "BCO-DMO Data Manager Processing Notes" in the Processing section of this page do not apply to these originally submitted .asc files

Methods & Sampling

Multiple hydrocasts were conducted at stations using a SeaBird CTD with redundant sensors for temperature and conductivity; the instrument package was owned and operated by the R/V Point Sur (Moss Landing Marine Laboratories, Moss Landing, California). Prior to the cruise, the transmissometer was not calibrated and many data anomalies were observed; therefore, transmissometer data are suspect.

Data Processing Description

All hydrocast data was processed to1-m bins.

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values replaced with no data value 'nd'
* added ISO DateTime UTC which was generated from Date and Time values
* special characters in data parameter names replaced
* changed precision %.3 except Spar %.2f
* used date/time local and zulu, lat, lon, cast number from provided event log
* added comment "redo cast 3 as there were bad bottles" from bottle file comment
* changed column Cruise to Cruise_name
* added column Cruise with value PS13-12 to match other datasets

Data Files

File
CTD.csv (Comma Separated Values (.csv), 868.99 KB) MD5:c125bcd8b783804901aeb24a42a8a2d0 Primary data file for dataset ID 701338

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1155663

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
PS1312	DYEatom	2013-06-27	R/V Point Sur	Jeffrey W. Krause (Chief Scientist)	data info

Instruments

CTD Sea-Bird 9

Supplied Name:

Supplied Description:

Sensor and calibration information for all casts can be found in the original .btl file zip file available on the dataset landing page: https://www.bco-dmo.org/dataset/701430

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

Fluorometer

Supplied Name: Fluorometer, WET Labs ECO-AFL/FL

Supplied Description:

Instrument Type

Generic Name: Fluorometer

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

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

LI-COR Biospherical PAR Sensor

Supplied Name: PAR/Irradiance, Biospherical/Licor

Supplied Description:

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-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43

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

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Cast_NUM	CTD cast number	unitless	cast
Cruise	Cruise identifier	unitless	cruise_id
Cruise_name	Cruise name	unitless	cruise_name
Latitude	Latitude in decimal degrees	unitless	lat
Longitude	Longitude in decimal degrees	unitless	lon
Date_Local	Date (local) in format mmm dd yyyy	unitless	date
Time_Local	Time (local) in format HH:MM:SS	unitless	time
Date_Zulu	Date (UTC) in format mmm dd yyyy	unitless	date
Time_Zulu	Time (UTC) in format HH:MM:SS	unitless	time
ISO_DateTime_UTC	ISO timestamp based on the ISO 8601:2004(E) standard in format YYYY-mm-ddTHH:MMZ (UTC)	unitless	ISO_DateTime_UTC
Comment	Comment about cast	unitless	comment
Depth	Depth from CTD (Seasave parameter DepSM)	meters (m)	depth
Pressure	Pressure from CTD (Seasave parameter PrDM)	decibars (db)	press
Temperature0	Primary temperature from CTD (Seasave parameter T090C)	degrees Celsius	temp
Temperature1	Secondary temperature from CTD (Seasave parameter T190C)	degrees Celsius	temp
Conductivity0	Primary conductivity from CTD (Seasave parameter C0S/m)	Siemens per meter (S/m)	cond
Conductivity1	Secondary conductivity from CTD (Seasave parameter C1S/m)	Siemens per meter (S/m)	cond
Salinity0	Primary salinity from CTD (Seasave parameter Sal00)	Practical Salinity Units (PSU)	sal
Salinity1	Secondary sailinity from CTD (Seasave parameter Sal11)	Practical Salinity Units (PSU)	sal
Density0	Primary sigma-theta from CTD (Seasave parameter Sigma/e00)	kilograms per meter cubed (kg/m3)	sigma_theta
Density1	Primary sigma-theta from CTD (Seasave parameter Sigma/e11)	kilograms per meter cubed (kg/m3)	sigma_theta
Fluorescence	Fluorescence from Wet Labs ECO-AFL sensor on CTD (Seasave parameter FlECO/AFL)	milligrams per meter cubed (mg/m3)	fluor
Oxygen	Dissolved Oxygen from CTD (Seasave parameter Sbeox0Mm/Kg)	micromoles per kilogram (umol/kg)	O2
PAR	Photosynthetically Active Radiation (PAR) from CTD (Seasave parameter Par)	microeinsteins per square meter per second (uE/m2/s)	PAR
Surface_PAR	Surface Photosynthetically Active Radiation (PAR) from CTD (Seasave parameter Spar)	microeinsteins per square meter per second (uE/m2/s)	SPAR
Corrected_PAR	Corrected Irradiance from CTD (Seasave parameter Cpar)	percent (%)	PAR

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Dataset: CTD profiles