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A Hybrid Lister‐Outrigger Probe for Rapid Marine Geothermal Gradient Measurement
Earth and Space Science ( IF 2.9 ) Pub Date : 2020-11-03 , DOI: 10.1029/2020ea001327
Matthew J. Hornbach 1 , Joshua Sylvester 1 , Chris Hayward 1 , Michel Kühn 2 , Katrin Huhn‐Frehers 3 , Tim Freudenthal 3 , Sebastian F. L. Watt 4 , Christian Berndt 2 , Steffen Kutterolf 2 , Jannis Kuhlmann 3 , Carina Sievers 2 , Sophia Rapp 3 , Kilian Pallapies 3 , Ricarda Gatter 3 , Leonie Hoenekopp 3
Affiliation  

We have successfully constructed and tested a new, portable, Hybrid Lister‐Outrigger (HyLO) probe designed to measure geothermal gradients in submarine environments. The lightweight, low‐cost probe is 1–3 m long and contains 4–12 semiconductor temperature sensors that have a temperature resolution of 0.002°C, a sample rate of <2 s, and a maximum working depth of ~2,100 m below sea level (mbsl). Probe endurance is continuous via ship power to water depths of ~700 mbsl or up to ~1 week on batteries in depths >500 mbsl. Data are saved on solid‐state disks, transferred directly to the ship during deployment via a data cable, or transmitted via Bluetooth when the probe is at the sea surface. The probe contains an accelerometer to measure tilt, internal pressure, temperature, and humidity gauges. Key advantages of this probe include (1) near‐real‐time temperature measurements and data transfer; (2) a low‐cost, transportable, and lightweight design; (3) easy and rapid two‐point attachment to a gravity corer, (4) short (3–5 min) thermal response times; (5) high temporal/spatial resolution; and (6) longer deployment endurance compared to traditional methods. We successfully tested the probe both in lakes and during sea trials in May 2019 offshore Montserrat during the R/V Meteor Cruise 154/2. Probe‐measured thermal gradients were consistent with seafloor ocean‐drilling temperature measurements. Ongoing probe improvements include the addition of real‐time bottom‐camera feeds and long‐term (6–12 months) deployment for monitoring.

中文翻译:

一种用于海洋地热梯度快速测量的Lister-Outrigger混合探头

我们已经成功构建并测试了一种新型便携式便携式Lister-Outrigger(HyLO)探头,旨在测量海底环境中的地热梯度。轻巧,低成本的探头长1-3 m,包含4-12个半导体温度传感器,其温度分辨率为0.002°C,采样率<2 s,在海底下的最大工作深度为〜2,100 m级别(mbsl)。通过船上的电源,水深约700 mbsl或水深大于500 mbsl的电池长达约1周,探头的耐力是连续的。数据保存在固态磁盘上,在部署期间通过数据电缆直接传输到船上,或者在探头位于海面时通过蓝牙传输。探头包含一个加速度计,用于测量倾斜度,内部压力,温度和湿度计。该探头的主要优点包括:(1)近实时温度测量和数据传输;(2)低成本,轻便,轻巧的设计;(3)简便,快速的两点式安装到重力取芯器上;(4)热响应时间短(3-5分钟);(5)高的时间/空间分辨率;(6)与传统方法相比,部署寿命更长。我们在R / V流星巡游154/2期间于2019年5月在蒙特塞拉特(Montserrat)海上和海上试验中成功测试了该探测器。探针测得的热梯度与海底洋钻温度测量值一致。正在进行的探针改进包括添加实时底部摄像机提要以及用于监视的长期(6-12个月)部署。(3)简便,快速的两点式安装到重力取芯器上;(4)热响应时间短(3-5分钟);(5)高的时间/空间分辨率;(6)与传统方法相比,部署寿命更长。我们在R / V流星巡游154/2期间于2019年5月在蒙特塞拉特(Montserrat)海上和海上试验中成功测试了该探测器。探针测得的热梯度与海底洋钻温度测量值一致。正在进行的探针改进包括添加实时底部摄像机提要以及用于监视的长期(6-12个月)部署。(3)简便,快速的两点式安装到重力取芯器上;(4)热响应时间短(3-5分钟);(5)高的时间/空间分辨率;(6)与传统方法相比,部署寿命更长。我们在2019年5月R / V流星巡游154/2期间在蒙特塞拉特海上和海上试验中成功测试了该探测器。探针测得的热梯度与海底洋钻温度测量值一致。正在进行的探针改进包括添加实时底部摄像机提要以及用于监视的长期(6-12个月)部署。我们在R / V流星巡游154/2期间于2019年5月在蒙特塞拉特(Montserrat)海上和海上试验中成功测试了该探测器。探针测得的热梯度与海底洋钻温度测量值一致。正在进行的探针改进包括添加实时底部摄像机提要以及用于监视的长期(6-12个月)部署。我们在R / V流星巡游154/2期间于2019年5月在蒙特塞拉特(Montserrat)海上和海上试验中成功测试了该探测器。探针测得的热梯度与海底洋钻温度测量值一致。正在进行的探针改进包括添加实时底部摄像机提要以及用于监视的长期(6-12个月)部署。
更新日期:2021-01-07
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