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.

<p>Data for temperature, pressure, and turbidity collected by Miniature Autonomous Plume Recorders (MAPR's) near the&nbsp;Axial Seamount on the Juan de Fuca Ridge. The MAPR's were&nbsp;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.</p>

<p>Four MAPR's were deployed at different elevations above the seafloor: M34 at 55m, M12 at 80m, M13 at 105m, and M35 at 130m.&nbsp;&nbsp;</p>

<p>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.&nbsp;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.<br />
<br />
See details of Mooring operations in the online cruise reports for 2015 and 2017:&nbsp;<br />
<a href=\"//www.pmel.noaa.gov/eoi/axial/2015/Axial2015-Cruise-Report-with-logs-revised.pdf\" target=\"_blank\">https://www.pmel.noaa.gov/eoi/axial/2015/Axial2015-Cruise-Report-with-logs-revised.pdf</a><br />
<a href=\"https://www.pmel.noaa.gov/eoi/axial/2017/Axial-2017-CruiseReport-final-nologs.pdf\" target=\"_blank\">https://www.pmel.noaa.gov/eoi/axial/2017/Axial-2017-CruiseReport-final-nologs.pdf</a></p>

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

<p>Information on NOAA-PMEL MAPR:<br />
<a href=\"https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/\" target=\"_blank\">https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/</a></p>