Dataset: Dorado 2014: Pore fluid chemistry from gravity cores
Deployment: AT26-24_Alvin_Dives

This dataset contains concentrations of phosphate, nitrate+nitirite, silicate, ammonium, stable carbon isotope ratio of dissolved inorganic carbon (d13C_DIC), and various elemental concentrations (Ba, B, Mn, Fe, Si, Sr, Na, Ca, Mg, K, Li).

Gravity cores were collected during the R/V Atlantis cruise AT26-24 by the submersible Alvin in December of 2014.

Methods & Sampling

Dataset acquisition description

Gravity core sampling took place at Dorado Outcrop off the west coast of Costa Rica in the Pacific Ocean during the R/V Atlantis cruise AT26-24. For more information about operations of this cruise see the cruise page which contains a link to the cruise report (AT26-24).

Phosphate, N+N, silicate, and NH4, were all run at Oregon State University using standard colorimetric techniques. Dissolved inorganic carbon (DIC) was run at Oregon State University using coulometry. Remaining elements were analyzed using Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES). Comparison of Si measured via the two techniques shows an offset with the colorimetric results being ~7 uM higher than the ICP-OES results.

Data Processing Description

Dataset Processing Description

The data have not been processed further.

BCO-DMO Processing Notes:

* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* BD indicates Below Detection
* blank values replaced with no data value 'nd'
* added ,dive_date, dive_lat, dive_lon from information in the cruise report (Table 4)

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1130146	NSF Division of Ocean Sciences
OCE-1131210	NSF Division of Ocean Sciences

Instruments

Gravity Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Gravity Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079).

Inductively Coupled Plasma Optical Emission Spectrometer

Supplied Name: Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES)

Supplied Description:

Instrument Type

Generic Name: Inductively Coupled Plasma Optical Emission Spectrometer

Acronym: ICP-OES or ICP-AES

Generic Description:

Also referred to as an Inductively coupled plasma atomic emission spectroscope (ICP-AES). These instruments pass nebulised samples into an inductively-coupled gas plasma (8-10000 K) where they are atomised and excited. The de-excitation optical emissions at characteristic wavelengths are spectroscopically analysed. It is often used in the detection of trace metals.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cmbsf	Depth below sea floor of sample	centimeters	depth_bsf
core_id	Gravity core identifier	unitless	core_id
dive_id	Alvin submersible dive identifier	unitless	dive_id
dive_date	Alvin submersible dive date in format yyyy-mm-dd	unitless	date
dive_lat	Alvin submersible dive latitude; north is positive	decimal degrees	lat
dive_lon	Alvin submersible dive longitude; east is positive	decimal degrees	lon
phosphate	Phosphate concentration	micromolar (uM)	PO4
N_plus_N	Nitrate plus Nitrite (NO3+NO2) concentration	micromolar (uM)	NO3_NO2
silicic_acid	Silicic acid concentration	micromolar (uM)	Silicate
NH4	Ammonium concentration	micromolar (uM)	NH4
d13C_DIC	Stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC) using the Pee Dee Belemnite (PDB) standard	permil (0/00)	d13C_DIC
d13C_DIC_stdev	Standard deviation of stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC) using the Pee Dee Belemnite (PDB) standard	permil (0/00)	d13C_DIC
d13C	Stable carbon isotope ratio (13C:12C)	micromolar (uM)	d13C
Ba	Barium concentration	micromoles per kilogram (umol/kg)	Ba
B	Boron concentration	micromoles per kilogram (umol/kg)	B
Mn	Manganese concentration	micromoles per kilogram (umol/kg)	Mn
Fe	Iron concentration	micromoles per kilogram (umol/kg)	Fe
Si	Silicon concentration	micromoles per kilogram (umol/kg)	Si
Sr	Strontium concentration	micromoles per kilogram (umol/kg)	Sr
S	Sulfur concentration	millimoles per kilogram (mmol/kg)	trace_element_conc
Na	Sodium concentration	millimoles per kilogram (mmol/kg)	Na
Ca	Calcium concentration	millimoles per kilogram (mmol/kg)	Ca
Mg	Magnesium concentration	millimoles per kilogram (mmol/kg)	Mg
K	Potassium concentration	millimoles per kilogram (mmol/kg)	K
Li	Lithium concentration	micromoles per kilogram (umol/kg)	Li

Database

Contribute Data

Dataset: Dorado 2014: Pore fluid chemistry from gravity cores
Deployment: AT26-24_Alvin_Dives

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Dorado 2014: Pore fluid chemistry from gravity coresDeployment: AT26-24_Alvin_Dives

Dataset acquisition description

Dataset Processing Description

Dataset: Dorado 2014: Pore fluid chemistry from gravity cores
Deployment: AT26-24_Alvin_Dives