Dataset: TN327 Axial 2015 MAPR Mooring Data

Name: Data collected from Miniature Autonomous Plume Recorders (MAPRs) deployed near the Axial Seamount on the Juan de Fuca Ridge on R/V Thomas G. Thompson TN327 in August 2015 and collected in July 2017.
Published: 2018-03-21
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.731092.1

Spatial Extent: N:46.0934 E:-129.9814 S:46.0934 W:-129.9814

Temporal Extent: 2015-08-27 - 2016-02-29

Project:

Event response to an eruption at Axial Seamount (NeMO2015)

Program:

Ocean Observatories Initiative (OOI)

Principal Investigator:

Edward T. Baker (National Oceanic and Atmospheric Administration, NOAA-PMEL)

Co-Principal Investigator:

David A. Butterfield (National Oceanic and Atmospheric Administration, NOAA-PMEL)

Contact:

Sharon L. Walker (National Oceanic and Atmospheric Administration, NOAA-PMEL)

BCO-DMO Data Manager:

Megan Switzer (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2018-03-21

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data collected from Miniature Autonomous Plume Recorders (MAPRs) deployed near the Axial Seamount on the Juan de Fuca Ridge on R/V Thomas G. Thompson TN327 in August 2015 and collected in July 2017.

Abstract:

Data collected from Miniature Autonomous Plume Recorders (MAPRs) deployed near the Axial Seamount on the Juan de Fuca Ridge on R/V Thomas G. Thompson TN327 in August 2015 and collected in July 2017.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2018-03-21	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.731092.1	2019-04-10

Description

Data for temperature, pressure, and turbidity collected by Miniature Autonomous Plume Recorders (MAPR's) near the Axial Seamount on the Juan de Fuca Ridge. The MAPR's were equipped with a Seapoint light-backscattering sensor, a temperature sensor, and a pressure sensor. The light-backscattering sensor measures “Nephelometric Turbidity Units”, which are a dimensionless, relative measure of particle mass concentration. The data for each MAPR includes information for elevation above the seafloor and the depth below the surface.

Four MAPR's were deployed at different elevations above the seafloor: M34 at 55m, M12 at 80m, M13 at 105m, and M35 at 130m.

The mooring was deployed at 46.0934°N, 129.9814°W, at a bottom depth of 1780 m , on 27 August 2015, and recovered on 21 July 2017. A MAPR at 30 m above bottom (mab) failed to log. Batteries in MAPRs M12, M13, and M35 failed between early Nov and early Dec 2015. M34 recorded for the entire deployment, but data after ~February 2016 is unusable because of biofouling.

See details of Mooring operations in the online cruise reports for 2015 and 2017:
https://www.pmel.noaa.gov/eoi/axial/2015/Axial2015-Cruise-Report-with-logs-revised.pdf
https://www.pmel.noaa.gov/eoi/axial/2017/Axial-2017-CruiseReport-final-nologs.pdf

For an example of using moored MAPRs to measure temporal changes in water turbidity, see (Dziak et al., 2015).

Information on NOAA-PMEL MAPR:
https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/

Data Processing Description

Calibration information for MAPR sensors:
MAPR_calibration.txt

BCO-DMO processing notes:
-Changed parameter names to BCO-DMO naming conventions
-Changed date-time to ISO format
-Added fields for latitude and longitude

Data Files

File
731092.csv (Comma Separated Values (.csv), 3.28 MB) MD5:0fb71d1366fcd6510d4458604bcae9c5 Primary data file for dataset ID 731092

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1546695

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TN327	NeMO 2015	2015-08-14	R/V Thomas G. Thompson	William Chadwick (Chief Scientist)	data info

Instruments

Miniature Autonomous Plume Recorder

Supplied Name: MAPR

Supplied Description:

The PMEL MAPR is an inexpensive, lightweight yet rugged, simple to use self-contained instrument for recording light-backscattering (for suspended particle concentrations), oxidation-reduction potential (ORP, for detecting the presence of reduced chemical species such as H2S and Fe+2), temperature, and pressure during a wide variety of seagoing operations. MAPRs especially target operations where hydrothermal plume data are not normally collected: rock cores, dredges, or deep-towed geophysical and bottom imaging are some examples. To make these operations multi-disciplinary requires an instrument that is sensitive enough to detect hydrothermal optical anomalies yet simple enough for untrained researchers to use as an ancillary program without detracting from the time or efforts of the main sampling programs. With such an instrument, the opportunities to collect hydrothermal plume data through collaborations with other researchers, and without the need for additional dedicated technicians, expand to the global ocean.

https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/

Instrument Type

Generic Name: Miniature Autonomous Plume Recorder

Acronym: MAPR

Generic Description:

https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
MAPR	Name of MAPR	no units	instrument
Elevation	Depth above the seafloor	meters	depth
lat	Latidude of mooring	decimal degrees	lat
lon	Longitude of mooring	decimal degrees	lon
Cruise	Cruise ID	no units	cruise_id
ISO_date_time	ISO Date-Time UTC YYYY-MM-DDThh:mm:ss	no units	ISO_DateTime_UTC
Press_db	Pressure	decibars	press
Temp_deg	Temperature	degrees Celsius	temp
Depth	Depth below surface	meters	depth
Neph_volts	Raw voltage reading of the light-backscattering sensor; 0-5 V scale	volts	turbidity
Press_counts	Sensor pressure reading	counts	press
Temp_counts	Sensor temperature reading	counts	temp
Neph_counts	Light backscattering sensor reading	counts	turbidity