Temperature logger data from sediments and low water masses collected on the Denman Marine Voyage of the RSV Nuyina, 2025

These data were collected on voyage 3 of the RSV Nuyina in the 2024/2025 season. The voyage was colloquially known as the "Denman Marine Voyage", as it operated in the vicinity of the Denman Glacier.During voyage NUY202425080 to the region offshore the Denman glacier, miniature temperature loggers (MTLs) were deployed on kasten core and multicore deployments to record temperatures in the sediment and lowermost water masses. Probes were calibrated on CTD deployments twice during the voyage. The goal was to measure in situ temperatures while the corers were in the seafloor sediments, to understand geological (heat flux) and oceanographic (bottom waters) processes which leave records in the thermal gradient of the sediments below the seafloor.For a summary of the MTLs used on each deployment see NUY2025_V03_TemperatureProbeDeploymentSummary.xlsx. For MTL positioning on the corers and CTD see NUY2025_V03_MiniTempProbeDeploymentConfig.pdf.Probes were attached to the corers so that MTLs with smaller ID numbers were at the top of the corer and larger ID numbers at the bottom.Temperature records were recovered from kasten core (KCXX), and multicore (MCXX) deployments during the voyage (where XX is the sequential deployment number). No temperatures were recorded during multicore deployments 02 or 12. The topmost sensors failed on KC01 and MUC04 and data failed to download from the topmost MTL on KC06.Data is recorded under the deployment record number e.g. Kasten Core 01 data is in KC01 folder. Raw data from the MTL and winch is in the RawData folder.Data for each MTL was downloaded in the native WinTemp format (*.wtf) and exported to a text file (*.dat). MTL data were recorded with times in Australian Eastern Standard Time (AEST) and note that there was a switch from daylight saving time to standard AEST on April 6. The MTLs logged time and temperature only, so depths, and the period when the probes were in or on the seafloor need to be extracted from the winch wire out data. This is in KCXX_winchout.csv file, which has times in UTC.The MTLs were each calibrated twice during the voyage, during a CTD deployment, so temperature drift per instrument could be measured against the two CTD temperature loggers. These data can be found under Calibration/CTDXX, where XX refers to the CTD deployment number.In the case of the kasten core measurements, to enable conversion of temperature gradients to heat fluxes, the thermal conductivity of the kasten core sediments were measured in 20 cm intervals. These records can be found in the kasten core records.

本数据集采集于2024/2025航季的“努伊纳号（RSV Nuyina）”第3次科考航次。本次航次俗称“登曼海洋航次”，作业区域位于登曼冰川（Denman Glacier）周边海域。在本次航次编号NUY202425080的登曼冰川近岸海域作业期间，科研团队在箱式岩芯（kasten core）与多管岩芯（multicore）投放作业中部署了微型温度记录仪（MTLs），以采集沉积物及底层水团的温度数据。本航次期间，科研团队在2次温盐深仪（CTD）投放作业中对探头进行了校准。本次部署的核心目标为：在岩芯取样器置于海底沉积物中时原位测量温度，以解析会在海底沉积物热梯度中留下记录的地质（热通量）与海洋学（底层水团）过程。各投放作业所用微型温度记录仪的汇总信息，请参阅NUY2025_V03_TemperatureProbeDeploymentSummary.xlsx文件；微型温度记录仪在岩芯取样器及温盐深仪上的安装位置说明，请参阅NUY2025_V03_MiniTempProbeDeploymentConfig.pdf文件。探头按规则安装于岩芯取样器：ID编号更小的微型温度记录仪位于岩芯顶部，ID编号更大的则位于岩芯底部。本次航次共完成多组箱式岩芯（KCXX，XX为连续投放编号）与多管岩芯（MCXX，XX为连续投放编号）投放作业，均成功回收温度记录数据。但多管岩芯投放作业02与12未采集到温度数据；KC01与MUC04的最顶部传感器发生故障，KC06最顶部微型温度记录仪的数据亦未能成功下载。数据按投放作业编号归档，例如箱式岩芯01的采集数据存储于KC01文件夹中。微型温度记录仪与绞车的原始数据存储于RawData文件夹中。每台微型温度记录仪的数据均以WinTemp原生格式（*.wtf）下载，并导出为文本文件（*.dat）。微型温度记录仪的时间记录采用澳大利亚东部标准时间（AEST），需注意：该时区于4月6日完成了夏令时转标准时的切换。微型温度记录仪仅记录时间与温度数据，因此探头的下放深度、探头处于海底内部或表面的时段，需从绞车钢绳下放数据中提取。该类数据存储于KCXX_winchout.csv文件，其中时间采用协调世界时（UTC）。本航次期间，每台微型温度记录仪均在2次温盐深仪投放作业中完成校准，因此可参照两台温盐深仪温度记录仪的读数，计算每台仪器的温度漂移量。校准数据存储于Calibration/CTDXX目录下，其中XX代表温盐深仪投放作业编号。针对箱式岩芯的温度测量数据，为实现温度梯度至热通量的转换，科研团队以20厘米为间隔，测量了箱式岩芯沉积物的热导率。相关测量记录可在箱式岩芯归档数据中查阅。