Heat flow data at station HF1628 during RV SONNE cruise SO247

We used the 6 m long Bremen heat flow probe also called Giant Heat Flow Probe (GHF). The heat probe is constructed in the classical “violin bow” design (Hyndman et al., 1979; Hartmann and Villinger, 2002, Villinger et al., 2010), with 21 thermistors distributed over an active length of 5.2 m in 0.26 m intervals mounted inside an oil filled hydraulic tube (O.D. 14 mm) which is attached to the strength member (O.D. 130 mm). The sensor tube also contains a heater wire for the generation of high energy heat pulses of typically on the order of 800 J/m for in situ thermal conductivity measurements according to the pulsed needle probe method (Lister, 1979). A calibrated PT-100 seawater sensor on top of the weight stand allows to measure the absolute bottom water temperature and to check the calibration of the sensor string in deep water with high accuracy. Inclination and acceleration of the probe is measured to monitor the penetration process into the sediments and potential disturbances during the actual measurement period.

本研究采用了长度为6 m的不来梅热流探针，亦称巨型热流探针（Giant Heat Flow Probe, GHF）。该热流探针采用经典的‘小提琴弓’结构设计（Hyndman等，1979；Hartmann与Villinger，2002；Villinger等，2010），在充油液压管（外径O.D. 14 mm）内以0.26 m的间隔布设了21个热敏电阻（thermistors），有效布设长度达5.2 m；该液压管连接于外径O.D. 130 mm的承重构件之上。传感器管内还搭载有加热丝，用于产生通常约800 J/m量级的高能热脉冲，以依据脉冲针探法（pulsed needle probe method，Lister，1979）开展原位热导率测量。配重架顶部安装有经过校准的PT-100型海水传感器，可精准测量底层海水绝对温度，同时可在深水中高精度校验传感器串的校准状态。系统还会采集探针的倾角与加速度数据，用于监控探针向沉积物的贯入过程，以及实际测量阶段可能出现的各类扰动。