Dataset: GoCal4

Name: Bottle and CTD data from the CARNE ASADA project from R/V New Horizon GoCAL4 in the Gulf of California and eastern tropical North Pacific from July to August 2008 (CARNE ASADA project)
Published: 2012-08-02
Keywords: oceans

Cite This Dataset

Spatial Extent: N:32.5 E:-106.5 S:20.5 W:-120.5

Project:

The role of marine Crenarchaeota in nitrification and links among biogeochemical processes in the eastern tropical North Pacific and Gulf of California (CARNE ASADA)

Principal Investigator:

John Michael Beman (University of Hawai'i, UH)

Co-Principal Investigator:

Brian N. Popp (University of Hawai'i, UH)

Version:

2012-08-02

Version Date:

2012-08-02

Validated:

Current State:

Preliminary and in progress

Bottle and CTD data from the CARNE ASADA project from R/V New Horizon GoCAL4 in the Gulf of California and eastern tropical North Pacific from July to August 2008 (CARNE ASADA project)

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Description

Bottle nutrient data including Oxygen, Chlorophyl, and optical properies and corresponding CTD data from descrete depths associated with the 'Crenarchaeal Roles in Nitrification in the ETNP: Assessing Abundance, Diversity, and Activity (CARNE ASADA)' project.

This dataset is preliminary and not yet finalized by the PI.

Methods & Sampling

Temperature, conductivity and chlorophyll concentrations were measured using a Seabird SBE 9 conductivity-temperature-depth (CTD) sensor package equipped with a Seapoint fluorometer and photosynthetically active radiation sensor (Biospherical Instruments QSP-2300).

Nutrient and oxygen samples were collected using 10-liter PVC bottles deployed on the CTD rosette. NH4 concentrations were measured using fluorometric methods. NO2 and NO3 concentrations were measured using standard colormetric techniques. Oxygen concentrations were measured using a SBE oxygen sensor and corrected based on Winkler titrations.

For additional information on sampling and analytical methods, see Beman et al. 2012 Limnology and Oceanography 57: 711-726

Data Processing Description

BCO-DMO Processing Notes
Generated from original file CARNE_BCODMO.csv

BCO-DMO Edits
- Edited header parameters names to conform to BCO-DMO convention, of note:

- chl edited to 'chl_a'

- DO[umol/kg] edited to 'O2_umol_kg'

- DO[%] edited to 'O2_sat_pcnt'

- yyy-mm-dd edited to 'time_local'

- Edited missing data (e.g., no data, no sample collected) to 'nd'
- Edited reported Latitude from 360 degree to +/-180 degree representation
- Separated date and time; included ISO-formatted date/time.

- values of PAR equal to 1.0E -12 were edited to zero (0)

- At request of PI, data column 'type' was removed from the served view of the data, but remains in the data file.

NOTE:

Data columns for each parameter quality flag (*_QF) were removed from the served view of the data, but remain in the data file. These quality flags were added by ODV by default upon import and have subsequently followed the data. All quality flags (even for missing data) are set to "1" in the data file, which indicates "unknown quality" in the ODV software.

At request of PI, a second column describing publication station names was added to the data file as 'station_pub'. The station number at time of sample collection (i.e. from the cruise) is named 'station'.

Data Files

File
GoCal4.csv (Comma Separated Values (.csv), 35.78 KB) MD5:8538232ba048a5bcf3342a2942213cb0 Primary data file for dataset ID 3689

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1034943
NSF Division of Ocean Sciences	OCE-0824997

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
GoCAL4	NH0809	2008-07-10	R/V New Horizon	John Michael Beman (Principal Investigator)	data info

Instruments

CTD Sea-Bird 9

Supplied Description:

SBE 9 CTD was equipped with a Seapoint Fluorometer and Biospherical Instruments QSP-2300 PAR sensor.

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 Description:

Seapoint fluorometer attached to a Seabird SBE 9 CTD

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.

Niskin bottle

Supplied Description:

10-liter PVC bottles were deployed on the CTD rosette.

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.

Photosynthetically Available Radiation Sensor

Supplied Description:

Biospherical Instruments PAR sensor model QSP-2300 was employed for PAR mesurements.

Instrument Type

Generic Name: Photosynthetically Available Radiation Sensor

Acronym: PAR sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43 Dissolved Oxygen Sensor

Supplied Description:

Sensor values were corrected using Winkler titrations.

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

Transmissometer

Supplied Description:

Instrument Type

Generic Name: Transmissometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/124/

Generic Description:

A transmissometer measures the beam attenuation coefficient of the lightsource over the instrument's path-length. This instrument designation is used when specific manufacturer, make and model are not known.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise id, originally submitted as 'cruise'	dimensionless	cruise_id
station	Station number given to stations at time of cruise. These designations differed from station numbers at time of publication. Distinction was added at the request of the PI.	dimensionless	station
date	Date, originally reported as format only (yyyy-mm-dd).	yyyy/mm/dd	date
time_local	Local time in hours and minutes, originally reported as units only (hh:mm).	hh:mm	time_local
lon	Longitude originally submitted in 360 degree format.	decimal degrees	lon
lat	Latitude in decimal degrees.	decimal degrees	lat
depth_w	Depth originally submitted as 'Bot. Depth'.	meters	depth_w
depth	Sample or observation depth.	meters	depth
NH4	Ammonium, reported in nanoMolar concentration.	nM	NH4
NO2	Nitrite reported in microMolar concentration.	microMolar	NO2
NO3	Nitrate, reported in microMolar concentration.	microMolar	NO3
PO4	Phosphate.	microMolar	PO4
temp1	Water temperature at observation depth.	degrees Celsius	temp
temp2	Water temperature at observation depth.	degrees Celsius	temp
sal	Salinity reported in parts per thousand (permille) units, originally reported as 'salinity'.	ppt	sal
density	Water density.	kilograms/meter^3	density
PAR	Photosynthetically available radiation. Original PAR values equivalent to 1.0E12 were served as zero.	uE/m^2/sec	PAR
SPAR	Surface photosynthetically available radiation.	uE/m^2/sec	SPAR
trans	Light transmission.	percent	trans
chl_a	Chlorophyll pigment measurement, originally reported as chl.	micrograms/Liter	chl_a
O2_umol_kg	Dissolved oxygen, originally reported as 'DO[umol/kg]'.	micromoles/kg	O2_umol_kg
O2_sat_pcnt	Oxygen saturation reported as DO in percent, originally reported as 'DO[%]'.	percent	O2_sat_pcnt
SPAR_pcnt	Percentage of surface PAR, originally submitted as 'SPAR[%]'.	percent	no_bcodmo_term
station_pub	Station number at time of publication. These designations differ from those given at the time of the cruise. This distinction was added at the request of the PI.	dimensionless	station

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Dataset: GoCal4