Data Project:
Dataset Maintainers: Charles Geoffrey Wheat, Karen Soenen
Last Modified: October 14, 2020
URLhttps://www.bco-dmo.org/dataset/820188
Download URLhttps://www.bco-dmo.org/dataset/820188/data/download
Media Type text/tab-separated-values
Created August 7, 2020
Modified October 14, 2020
State Final no updates expected

Acquisition Description

Once on deck, OsmoSamplers were sectioned. Individual coils of Teflon tubing (each ~300 m long) were removed, sealed, and labeled. Each coil was then sectioned into 1.2 m lengths and the fluid expelled into acid washed (60C for 14 hours in 10%HCl) and rinsed (18 mega ohm water) micro centrifuge tubes. Centrifuge tubes were labeled and packaged for shipment.

In the laboratory aliquots from these centrifuge tubes were diluted before being analyzed using an inductively coupled plasma optical emission spectrometer (ICPOES). In addition the fresh water reservoir for each of the OsmoSampler pumps was analyzed for salinity to asses if the samplers over pumped and if so, by how much.

Additional descriptions for the recovered samplers can be found at Edwards et al. (2012) and Wheat et al. (2011).

Processing Description

Fluids were analyzed with an inductively coupled plasma optical emission spectrometer (ICPOES) as described in Wheat et al. (2020). Analytical precision is listed as 2%, but individual runs were ofter lower.

BCO-DMO processing notes:

  • Reformatted table structure to flat file format
  • Adjusted column names to comply with database requirements
  • Adjusted date format to yyyy-mm-dd
  • Added latitude and longitude of samples

Instruments

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.

ROV Jason-II [ROV Jason]
Details
Instance Description (ROV Jason-II)

OsmoSamplers that were recovered on R/V Atlantis Expedition AT39-01 with the ROV Jason-II

The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on "elevator" platforms that float heavier loads to the surface. More information is available from the operator site at URL.

Parameters

Borehole_type_coil [sample_descrip]
Details
Borehole_type_coil
Borehole, type and coil
text description of sample collected
Sample_number [sample_descrip]
Details
Sample_number
Sample number
text description of sample collected
Date [date]
Details
Date
Samling data in ISO format (yyyy-mm-dd)

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)

Ba [Ba]
Details
Ba
Barium (Ba) concentration

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

B [B]
Details
B
Boron (B) concentration

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

Mn [Mn]
Details
Mn
Manganese (Mn) concentration

Manganese (Mn). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

Fe [Fe]
Details
Fe
Iron (Fe) concentration

Iron (Fe). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

Li [Li]
Details
Li
Lithium (Li) concentration

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

Si [Si]
Details
Si
Silicon (Si) concentration

Silicon (Si). Concentrations may be reported in parts per million, nanomoles per liter, or other units. Refer to dataset metadata for units.

Longitude [longitude]
Details
Longitude

Sampling location - longitude, west is negative
 

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

Latitude [latitude]
Details
Latitude

Sampling location - latitude, south is negative
 

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

Dataset Maintainers

NameAffiliationContact
Charles Geoffrey WheatUniversity of Alaska Fairbanks (UAF)
Karen SoenenWoods Hole Oceanographic Institution (WHOI BCO-DMO)
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