Dataset: ETSP CTD processed

Name: Processed CTD data from cruises R/V Atlantis (AT15-61) in Jan-Feb 2010 and R/V Melville (MV1104) in Mar-Apr 2011 in the Eastern Tropical South Pacific
Published: 2020-10-28
Keywords: CTD, ETSP, hydrography, oxygen minimum zone, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.827861.1

Spatial Extent: N:-9.97286 E:-79.99646 S:-20.01002 W:-100.001

Temporal Extent: 2010-02-01 - 2011-04-19

Project:

Expression of Microbial Nitrification in the Stable Isotopic Systematics of Oceanic Nitrite and Nitrate (Microbial Nitrification)

Chief Scientist:

William M. Berelson (University of Southern California, USC)

Co-Chief Scientist:

Angela N. Knapp (Florida State University EOAS, FSU - EOAS)

Principal Investigator:

Karen L. Casciotti (Stanford University)

Co-Principal Investigator:

Douglas G. Capone (University of Southern California, USC)

Contact:

Alyson E. Santoro (University of California-Santa Barbara, UCSB)

BCO-DMO Data Manager:

Dana Stuart Gerlach (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-10-28

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Processed CTD data from cruises R/V Atlantis (AT15-61) in Jan-Feb 2010 and R/V Melville (MV1104) in Mar-Apr 2011 in the Eastern Tropical South Pacific

Abstract:

Processed CTD data from cruises R/V Atlantis (AT15-61) in Jan-Feb 2010 and R/V Melville (MV1104) in Mar-Apr 2011 in the Eastern Tropical South Pacific

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2020-10-28	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.827861.1	2021-05-07

Methods & Sampling

Seawater samples were collected on R/V Atlantis (AT15-61) cruise in Jan-Feb 2010 and on R/V Melville (MV1104) cruise in Mar-Apr 2011. Water samples were collected at discrete depths using Niskin bottle type rosette samplers equipped with either 24 bottles (10L) or 12 bottles (20L), and an SBE9plus conductivity-temperature-depth (CTD) sensor package (SeaBird Electronics, Bellevue, WA).

Data Processing Description

(All data are downcast sensor data only).

Downcast CTD sensor data were processed using Seabird Electronics (SBE) Data Processing software using SBE recommended parameters, including the tau oxygen correction and oxygen hysteresis correction. Processing commands were applied in the following order: filter, alignctd, celltm, loopedit, wildedit. After manual inspection of the data, in the 2011 dataset, oxygen values were advanced 3 sec relative to the temperature data to minimize spiking around large gradients in dissolved oxygen. Data were binned at 1 m depth intervals.

Note: Missing data values for longitude (and other fields) are due to instrument aberration during collection

BCO-DMO data processing:

Added a conventional header with dataset name, PI names, version date
Concatenated individual files of binned data from two cruises
Replaced missing values with 'nd' ('nd' is BCO-DMO's default missing data identifier)
Replaced any -9.99e-29, -9.99e-28, -9.99e-27, +9.99e-29, +9.90e-27, -9.90e-28 values with 'nd'
Created Cruise and Cast columns based on filenames, and put filename in separate column
Added ISO DateTime UTC field for each cast with times from raw CTD files (as found in R2R)

Data Files

File
ETSP_CTD_processed.csv (Comma Separated Values (.csv), 8.27 MB) MD5:6d7b1a13000310fcd81f4481584bb285 Primary data file for dataset ID 827861

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0961098

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT15-61	ETSP2010	2010-01-29	R/V Atlantis	Douglas G. Capone (Chief Scientist) William M. Berelson (Co-Chief Scientist)	data info
MV1104	ETSP2011	2011-03-23	R/V Melville	William M. Berelson (Chief Scientist) Angela N. Knapp (Co-Chief Scientist)	data info

Instruments

CTD Sea-Bird 911

Supplied Name: CTD Sea-Bird 9

Supplied Description:

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.

CTD-fluorometer

Supplied Name: Seapoint

Supplied Description:

Instrument Type

Generic Name: CTD-fluorometer

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

Generic Description:

A CTD-fluorometer is an instrument package designed to measure hydrographic information (pressure, temperature and conductivity) and chlorophyll fluorescence.

LI-COR Biospherical PAR Sensor

Supplied Name: Biospherical/Licor

Supplied Description:

The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column.

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.

Niskin bottle

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Pressure Sensor

Supplied Name: Digiquartz

Supplied Description:

Instrument Type

Generic Name: Pressure Sensor

Generic Description:

A pressure sensor is a device used to measure absolute, differential, or gauge pressures. It is used only when detailed instrument documentation is not available.

Sea Tech Transmissometer

Supplied Name: Seatech

Supplied Description:

Instrument Type

Generic Name: Sea Tech Transmissometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0003/

Generic Description:

The Sea Tech Transmissometer can be deployed in either moored or profiling mode to estimate the concentration of suspended or particulate matter in seawater. The transmissometer measures the beam attenuation coefficient in the red spectral band (660 nm) of the laser lightsource over the instrument's path-length (e.g. 20 or 25 cm). This instrument designation is used when specific make and model are not known. The Sea Tech Transmissometer was manufactured by Sea Tech, Inc. (Corvalis, OR, USA).

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

Wet Labs ECO-AFL/FL Fluorometer

Supplied Name: Wetlab ECO-AFL/FL

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

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

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

Supplied Name	Supplied description	Supplied Units	Standard Name
ISO_DateTime_UTC	Date of sampling in ISO format (yyyy-mm-ddThh:mm:ssZ) with UTC time zone	yyyy-mm-dd hh:mm:ss	ISO_DateTime_UTC
Cruise	Cruise ID	unitless	cruise_id
Cast	Cast number	unitless	cast
nbf	Bottles fired	unitless	bot
c0	Conductivity, c0	Siemens per meter (S/m)	cond
c1	Conductivity, c1	Siemens per meter (S/m)	cond
density00	Density	kilograms per cubic meter (kg/m^3)	density
dep	Depth (salt water)	meters (m)	depth
latitude	Latitude of sample collection, South is negative	decimal degrees	lat
longitude	Longitude of sample collection, West is negative	decimal degrees	lon
sal00	Salinity	practical salinity units (PSU)	sal
svCM	Sound Velocity (Chen-Millero)	meters per second (m/s)	sound_vel
t090C	Temperature (ITS-90 standard scale)	degrees Celsius	temp
prDE	Pressure, Digiquartz (on AT15-61 cruise)	psi (pound-force per square inch)	press
prDM	Pressure, Digiquartz (on MV1104 cruise)	decibar (db)	press
bat	Beam Attenuation (Chelsea/Seatech/WET Lab CStar)	reciprocal meter (1/m)	beam_cp
xmiss	Beam Transmission (Chelsea/Seatech/WET Lab CStar)	percent	trans
density11	Density replicate	kilograms per cubic meter (kg/m^3)	density
oxsat	Oxygen Saturation (Weiss)	micromoles per kilogram (umol/kg)	O2sat
par	Photosynthetic active radiation or PAR/Irradiance (Biospherical/Licor)	micromoles of photons per square meter per sec (umol photons/m^2/s)	PAR
fluorescence	Fluorescence (WET Lab ECO-AFL/FL for AT15-61, Seapoint for MV1104 )	milligrams per cubic meters (mg/m^3)	fluor
sbeox0	Oxygen, SBE 43	micromoles per kilogram (umol/kg)	O2
flag	Flag indicator for pressure slowdown or reversal (0 = good)	unitless	flag
file_name	Filename of processed binned values	unitless	file_name

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Dataset: ETSP CTD processed