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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<p>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.</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. </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. 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: <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>
本数据集包含由微型自主羽流记录仪（Miniature Autonomous Plume Recorders，简称MAPR）在胡安德富卡海岭的轴山海山附近采集的温度、压力与浊度数据。该MAPR搭载了Seapoint型光后向散射传感器、温度传感器及压力传感器。其中光后向散射传感器可测量散射浊度单位（Nephelometric Turbidity Units），该单位为无量纲的相对颗粒物质量浓度表征方式。每份MAPR采集的数据均包含离海底高度及海面下深度信息。 本次共部署4台MAPR，各自布放于不同的离海底高度：M34为55米、M12为80米、M13为105米、M35为130米。 该锚系观测站于2015年8月27日布放，布放坐标为46.0934°N、129.9814°W，海底水深为1780米，并于2017年7月21日回收。其中布放于离海底30米（mab）处的MAPR未能正常记录数据。M12、M13及M35三台MAPR的电池在2015年11月初至12月初期间耗尽。M34在整个布放周期内均实现了数据记录，但2016年2月之后的数据因生物污损无法使用。 锚系观测站的具体作业细节可参阅2015年与2017年的在线航次报告： 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 如需了解利用锚系MAPR测量水体浊度时间变化的案例，可参阅（Dziak等，2015）。 关于NOAA-PMEL MAPR的相关信息，可访问： https://www.pmel.noaa.gov/eoi/PlumeStudies/mapr/
