Ice and snow pit measurements observed during the SIPEX II voyage of the Aurora Australis, 2012

This dataset contains routine measurements of snow and ice thickness, and snow-ice interface temperature, at 1m intervals along standard transects; snow property characterisation in snow pits measured at 0m, 50m and 100m along the transects; and sea ice cores acquired at various locations both along the transects and elsewhere on ice station floes during the 2012 SIPEX 2 marine science voyage. Ice temperature information is acquired from the cores, which are taken on-board for further analysis. The latter includes thin-section analysis of sea-ice stratigraphy and crystallography at -20C within the freezer lab on-board the ship. The cores are then cut up into 5cm sections and melted for analysis of salinity and stable oxygen isotopes.Observation items:Snow: - Thickness- Temperature profile (every 3 cm)- Snow-ice interface temperature at 1m intervals along the 100m transects- Grain size- Grain shape- Density- Hardness- Salinity- Stable oxygen isotopeIce:- Thickness- Freeboard- Draft- Temperature- Salinity- Stable oxygen isotope- Crystallography and texture- DensityInstruments:Snow: Folding scales, Spatula, Thermometer, Snow sampler, Magnifying glass, Salinometer, Temperature and thickness probes, scalesIce:Drills, corers, ice-thickness tape measures, thermometer, salinometer, band-saw, cross-polarising filter, scalesThe data are recorded in log books (scanned copies are included in this dataset) and have been transferred into the standard AAD sea-ice database templates (in excel format) for each station.

本数据集包含三类科考观测数据：其一为沿标准断面以1米间隔获取的雪、冰厚度及雪冰界面温度常规观测数据；其二为沿断面0m、50m、100m位置开挖雪坑所测得的雪层特性参数；其三为2012年SIPEX 2海洋科学科考航次期间，沿上述断面及冰站浮冰其他区域采集的海冰岩芯数据。冰温数据源自所采集的海冰岩芯，此类岩芯将被带回船上开展后续分析：包括在船上冷冻实验室的-20℃环境下，对海冰地层学与晶体学进行薄片分析；随后将岩芯切割为5厘米分段并融化，用于盐度与稳定氧同位素检测分析。

观测项目：
雪层相关：
- 厚度
- 每3厘米间隔的温度剖面
- 沿100米断面每1米间隔的雪冰界面温度
- 颗粒粒径
- 颗粒形态
- 密度
- 硬度
- 盐度
- 稳定氧同位素
海冰相关：
- 厚度
- 干舷高度
- 吃水深度
- 温度
- 盐度
- 稳定氧同位素
- 晶体学与结构纹理
- 密度

观测仪器：
雪层观测仪器：折叠式量尺、取样铲、温度计、雪层采样器、放大镜、盐度计、温度与厚度探针、天平
海冰观测仪器：钻孔机、取芯器、冰厚卷尺、温度计、盐度计、带锯、交叉偏振滤光片、天平

所有数据均记录于科考日志中，本数据集包含日志扫描副本，且已针对每个站位录入至澳大利亚南极局（Australian Antarctic Division, AAD）标准海冰数据库Excel模板中。