Download URLhttps://www.bco-dmo.org/dataset/664335/data/download
Media Type text/tab-separated-values
Created November 10, 2016
Modified July 3, 2017
State Final no updates expected
Brief Description

Discrete temperature and DO measured with Alvin

Acquisition Description

Temperature measurements were made with the thermal couple on board the HOV Alvin.  The dissolved oxygen concentrations were measured with an Aanderra optode.

The Alvin dives were conducted off the west coast of Costa Rica in the Pacific Ocean at Dorado Outcrop during the R/V Atlantis cruise AT26-24.  For more information about operations of this cruise see the cruise pages which contain links to cruise reports (AT26-24)

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
* added lat/lon of Alvin dives as listed in the Alvin Dive Log ​​


Aanderaa Oxygen Optodes are instrument for monitoring oxygen in the environment. For instrument information see the Aanderaa Oxygen Optodes Product Brochure.
Alvin thermal couple [Temperature Logger]
Instance Description (Alvin thermal couple)

Discrete measurements of temperature were made with the thermal couple on board the HOV Alvin. 

Records temperature data over a period of time.


dive_id [dive_id]

Dive identifier for Alvin dive

Unique dive id or number for ROV, AUV or HOV type system dive or deployment
dive_date [date]

Date (UTC) in 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)

dive_lat [latitude]

Latitude of Alvin dive where measurement was taken

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

dive_lon [longitude]

Longitude of Alvin dive where measurement was taken; west is negative.

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

temp [temperature]


water temperature at measurement depth
oxygen [O2_umol_L]

Dissolved oxygen

Oxygen; dissolved; reported in units of micromoles/liter

location [site]

Location measurement was taken

Sampling site identification.

Dataset Maintainers

Charles Geoffrey WheatUniversity of Alaska Fairbanks (UAF)
James McManusUniversity of Alaska Fairbanks (UAF)
Beth N. OrcuttUniversity of Akron (UAkron)
Andrew T. FisherUniversity of Akron (UAkron)
Samuel M. HulmeBigelow Laboratory for Ocean Sciences
Amber YorkUniversity of California-Santa Cruz (UC Santa Cruz)
Amber YorkUniversity of California-Santa Cruz (UC Santa Cruz)
Samuel M. HulmeMoss Landing Marine Laboratories (MLML)
Samuel M. HulmeMoss Landing Marine Laboratories (MLML)
Amber YorkWoods 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
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.

Data Project Maintainers
Charles Geoffrey WheatUniversity of Alaska Fairbanks (UAF-IMS)Principal Investigator
Andrew T. FisherUniversity of California-Santa Cruz (UC Santa Cruz)Principal Investigator
Samuel M. HulmeMoss Landing Marine Laboratories (MLML)Principal Investigator