Dorado 2014: OsmoSampler fluid chemistry

CENTER for DARK ENERGY BIOSPHERE INVESTIGATIONS

Data Project: Discovery, sampling, and quantification of flows from cool yet massive ridge-flank hydrothermal springs on Dorado Outcrop, eastern Pacific Ocean

Project Maintainers: Charles Geoffrey Wheat, Andrew T. Fisher, Samuel M. Hulme, Charles Geoffrey Wheat

Dataset Maintainers: Charles Geoffrey Wheat, James McManus, Beth N. Orcutt, Andrew T. Fisher, Samuel M. Hulme, Charles Geoffrey Wheat, Amber York

URL	https://www.bco-dmo.org/dataset/661481
Download URL	https://www.bco-dmo.org/dataset/661481/data/download
Media Type	text/tab-separated-values
Created	October 12, 2016
Modified	July 3, 2017
State	Final no updates expected
Brief Description	Spring and pore fluid chemistry from samples taken by OsmoSamplers

Acquisition Description

Continuous fluid samplers (OsmoSamplers) included a 12-membrane pump and one coil of Teflon tubing that was 300-m-long and small bore (1.1 mm ID). The tubing was initially filled with 18 MΩ distilled water. Upon retrieval, the Teflon coil was cut in 1.1 m lengths and the fluid was expelled into hot acid cleaned plastic microcentrifuge tubes. For more information about OsmoSamplers see the instruments page.

The R/V Atlantis cruise AT26-09 (2013 Jason/Sentry Expedition) deployed the OsmoSamplers. They were deployed for almost a full year. The R/V Atlantis cruise AT26-24 recovered the OsmoSamplers. Dorado Outcrop is off the west coast of Costa Rica in the Pacific Ocean at location 9 degrees 5.5 minutes north, 87 degrees 6.0 minutes west. For more information about operations of this cruise see the expedition reports and cruise information (AT26-24, AT26-09).

Processing Description

Other than converting signal counts, voltages, etc. to concentrations, the data have not been processed further.

BCO-DMO Processing Notes:

* added conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* added fields for OsmoSampler_name, date_deployed, date_recovered, location (e.g. Marker_K) from information in comments of original files submitted.
* Date format converted to ISO Date format

Instruments

OsmoSampler [osmotic pump]

Details

Instance Description (OsmoSampler)

OsmoSamplers are long-term osmotically pumped fluid samplers. For more information see the following reference:

Jannasch Hans W. , Wheat C. Geoff , Plant Josh N. , Kastner Miriam , Stakes Debra S. , (2004),Continuous chemical monitoring with osmotically pumped water samplers: OsmoSampler design and applications, Limnol. Oceanogr. Methods, 2, doi:10.4319/lom.2004.2.102.

osmotic pump

A pump that uses osmotic pressure to collect water samples.

An example of an osmotic pump is an OsmoSampler (Jannasch et al., 2004) which has no electrical or mechanical parts.

References:

Parameters

OsmoSampler_name [instrument]

Details

OsmoSampler_name

Name of the OsmoSampler Instrument

instrument

instrument used to collect or process data, definition is specific to the data set in which it appears

date_deployed [date]

Details

date_deployed

Date of OsmoSampler deployment in ISO format YYYY-mm-dd

date

date; generally reported in GMT as YYYYMMDD (year; month; day); also as MMDD (month; day); EqPac dates are local Hawaii time. ISO_Date format is YYYY-MM-DD (http://www.iso.org/iso/home/standards/iso8601.htm)

date_recovered [date]

Details

date_recovered

Date of OsmoSampler recovery in ISO format YYYY-mm-dd

date

location [site]

Details

location

Location of deployment

site

Sampling site identification.

sample_num [sample]

Details

sample_num

Sample number

sample

unique sample identification or number; any combination of alpha numeric characters; precise definition is file dependent

date_calculated [date]

Details

date_calculated

Date of chemical analysis in ISO format YYYY-mm-dd

date

DIC [DIC]

Details

DIC

Dissolved inorganic carbon

DIC

Dissolved Inorganic Carbon

DIC_stdev [standard deviation]

Details

DIC_stdev

Standard deviation of dissolved inorganic carbon

standard deviation

Generic standard deviation value, taking on the units of the parameter that it is tied to.

d13C_DIC [d13C_DIC]

Details

d13C_DIC

Stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC)

d13C_DIC

Stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC).

d13C_DIC_stdev [standard deviation]

Details

d13C_DIC_stdev

Standard deviation of the stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC)

standard deviation

Generic standard deviation value, taking on the units of the parameter that it is tied to.

V [V]

Details

Vanadium concentration

V (Vanadium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Rb [Rb]

Details

Rubidium concentration

Rb (rubidium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Mo [Mo]

Details

Molybdenum concentration

Mo (Molybdenum) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Cs [Cs]

Details

Cesium concentration

Cs (Cesium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Ba [Ba]

Details

Barium concentration

Ba (Barium). May be reported in parts per million, nanomoles per Liter, or other units. Refer to dataset metadata for units.

U [U]

Details

Uranium concentration

U (Uranium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Si [Si]

Details

Silicon concentration

Si (Silicon) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Sr [Sr]

Details

Strontium concentration

Sr (Strontium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Li [Li]

Details

Lithium concentration

Li (Lithium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

S [trace_element_conc]

Details

Sulfur concentration

trace_element_conc

Concentration of a trace element in seawater. Does not include trace metals and metaloids. Refer to dataset for element name and units.

Periodic Table

Na [Na]

Details

Sodium concentration

Na (Sodium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Ca [Ca]

Details

Calcium concentration

Ca (Calcium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

Mg [Mg]

Details

Magnesium concentration

Mg (magnesium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

K [K]

Details

Potassium concentration

K (potassium) concentration. May be reported in parts per million, nanomoles/Liter, or other units. Refer to dataset metadata for units.

lat_approx [latitude]

Details

lat_approx

Approximate latitude of sampling area Dorado Outcrop

latitude

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

lon_approx [longitude]

Details

lon_approx

Approximate longitude of sampling area Dorado Outcrop; west is negative

longitude

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datsets as degrees, minutes

Dataset Maintainers

Name	Affiliation	Contact
Charles Geoffrey Wheat	University of Alaska Fairbanks (UAF)	✓
James McManus	University of Akron (UAkron)
Beth N. Orcutt	Bigelow Laboratory for Ocean Sciences
Andrew T. Fisher	University of California-Santa Cruz (UC Santa Cruz)
Samuel M. Hulme	Moss Landing Marine Laboratories (MLML)
Charles Geoffrey Wheat	University of Alaska Fairbanks (UAF)	✓
Amber York	Woods Hole Oceanographic Institution (WHOI BCO-DMO)

BCO-DMO Project Info

Project Title	Discovery, sampling, and quantification of flows from cool yet massive ridge-flank hydrothermal springs on Dorado Outcrop, eastern Pacific Ocean
Acronym	Dorado Outcrop
URL	https://www.bco-dmo.org/project/627844
Created	November 30, 2015
Modified	December 1, 2015

Project Description

Description from NSF award abstract:
Pristine fluids from a typical ridge-flank hydrothermal system have never been sampled, mainly because it has not been possible to locate a site of focused discharge where representative samples could be collected. The PIs have located a small basement feature, Dorado outcrop, on 23 m.y.-old seafloor on the eastern flank of the East Pacific Rise that they plan to sample to determine the fluid composition, and to assess the rate of discharge from the outcrop, so that they can quantify the chemical impact of this hydrothermal system. They plan an 18-day expedition that combines the surveying capabilities of the AUV Sentry (bathymetric, sub-bottom sonar, photo mosaics, water column anomalies) and an ocean-class vessel capable of collecting high-quality multi-beam data and CTD samples, and supporting the survey and sampling capabilities of the ROV Jason II for collection of spring and plume fluids, heat flow data, sediment push cores, and still and video photography. These data and samples will be combined hopefully to generate the first well-constrained estimates of hydrothermal flows from Dorado outcrop. This expedition will result in the collection of samples and data from a "fire hose" of ridge-flank, hydrothermal system, challenging the commonly held view that discharge from ridge flank hydrothermal systems occurs primarily from diffuse seeps.

Project Maintainers

Name	Affiliation	Role	Contact
Charles Geoffrey Wheat	University of Alaska Fairbanks (UAF-IMS)	Principal Investigator	✓
Andrew T. Fisher	University of California-Santa Cruz (UC Santa Cruz)	Principal Investigator
Samuel M. Hulme	Moss Landing Marine Laboratories (MLML)	Principal Investigator

Acquisition Description

Processing Description

Instruments

Parameters

Dataset Maintainers

BCO-DMO Project Info

Project Description

Project Maintainers

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