Download URLhttps://www.bco-dmo.org/dataset/661921/data/download
Media Type text/tab-separated-values
Created October 19, 2016
Modified July 3, 2017
State Final no updates expected
Brief Description

Continuous temperature at marker K

Acquisition Description

This temperature record was collected by a HOBO temperature logger deployed in conjunction with the green OsmoSampler that was deployed at Marker K.  To access data from the OsmoSamplers see the OsmoSampler fluid chemistry dataset page. The temperature logger deployments were made off the west coast of Costa Rica in the Pacific Ocean at Dorado Outcrop during the R/V Atlantis cruise AT26-09 and recovered during the cruise AT26-24.  For more information about operations of this cruise see the cruise pages which contain links to cruise reports (AT26-24AT26-09)

The temperature logger was started before the deployment and was turned off upon recovery on the ship.  Increased temperatures relating to deployment and retrieval can be seen in the data.

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
* blank values replaced with no data value ‘nd’
* added approximate lat/lon values for Dorado Outcrop sample site
* ISO Date format generated from Date and Time values


HOBO model U12- 015 temperature logger [Temperature Logger]
Instance Description (HOBO model U12- 015 temperature logger)

Onset Computer Corporation HOBO model U12-015 modified with a titanium pressure case and long-life battery for use in the deep sea. The Onset tools have a working range of –40–100C but a lower resolution (0.02–0.1C across their working range)

Records temperature data over a period of time.


ISO_DateTime_UTC [ISO_DateTime_UTC]

Date/time (UTC) in ISO format YYYY-mm-ddTHH:MM:SS[.xx]

Date/Time (UTC) ISO formatted
This standard is based on ISO 8601:2004(E) and takes on any of the following forms:
2009-08-30T09:05:00[.xx] (local time)
2009-08-30T14:05:00[.xx]Z (UTC time)
The dashes and the colons can be dropped.
The T can also be dropped "by mutual agreement", but one needs the trailing Z if the time is UTC.

Sample ISO_datetime_utc:
2009-08-30T14:05:00[.xx]Z (UTC time)

Format: YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC time)
temp [temperature]
water temperature at measurement depth
lat_approx [latitude]

Approximate latitude of sampling area (Dorado Outcrop)

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

lon_approx [longitude]

Approximate longitude of sampling area (Dorado Outcrop); west is negative

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

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)

time [time]
Time (UTC) in format HH:MM
Time GMT defined as HHMM; time of day; generally reported in GMT as HHMM (hours and minutes) but may also be HH.H (decimal hours) or HHMMSS (hours; minutes and seconds); in EqPac time is reported as Hawaii local time

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