7 year oxygen isotope results from samples taken on Antarctic Plateau traverse, 1984

A total of nine stations were sampled for oxygen isotopes during the 1984 spring traverse to the Antarctic Plateau. The aim of this program was to take a number of samples from a core or a pit, at stations of known accumulation over a particular period, to see how far inland the annual cycles could accurately be traced. The samples were not taken at ice movement stations, but at canes each 2km along the line, to avoid sampling the accumulation, and thus isotope disturbance resulting from parking the vans beside the IMS poles in 1978 and 1979.

The accumulation for the cane at each sampled station was calculated for the six years since 1978, and the total multiplied by 7/6 to give the sampling depth required to cover 7 years. Seventy samples were taken at each station, i.e. approximately 10 per year. At most stations a PICO drill was used to obtain a core, and the samples cut with a stainless steel knife on the stainless sink in the living van. At the southern end of the line where the accumulation is much lower, the samples were taken from the wall of a pit, as the small length of core for each sample did not provide enough melt. The snow was sampled in the pits by sliding a flat sheet of galvanized iron into the snow at each interval starting at the top, and scraping the snow above this into a melt jar. Isotopic contamination of samples from both these methods should be negligible. All samples were melted in plastic jars, and then transferred into 5Oml plastic bottles. A total of 630 samples from 9 stations were returned to Australia for oxygen isotope analysis, carried out in Melbourne by Ted Vishart, Dick Marriot, and Gao Xiangqun.

The station/cane labels for the sample sites were:

A028
V140/4 (near GC30)
V230/4 (near GC37)
V270/1 (near GC38)
V300/1 (near GC39)
V350/1 (near GC40)
V400/1 (near GC41)
V450/1 (near GC42)
V630/1 (near GC47)

The columns in the spreadsheet are:

Sequence Number
Core depth (metres)
Oxygen isotope value (the number is a ratio of O18 per ml of O16, expressed as a percentage (but as parts per 1000 instead of 100))

1984年南极高原春季考察期间，共对9个站位开展了氧同位素采样。本项目的目标是在已知特定时段积雪积累量的站位，从冰芯或探坑中获取若干样品，以探明内陆区域年周期信号可被精准追溯的最远范围。本次采样未选取冰运动监测站位，而是沿考察路线每隔2km于一根采样桩处布设采样点，以规避积雪积累量采样带来的干扰，同时避免因1978年、1979年将科考车辆停靠于IMS观测杆旁所引发的同位素信号扰动。

针对每个采样桩站位，我们计算了1978年以来六年的积雪积累量，并将总积累量乘以7/6，以得到覆盖7年时长所需的采样深度。每个站位共采集70份样品，即年均约10份。多数站位采用PICO钻机（PICO drill）获取冰芯，随后在科考车的不锈钢水槽中用不锈钢刀具切割样品。在路线南端，由于积雪积累量极低，单份冰芯样品的长度过短，无法获得足够的融雪样本，因此改为从探坑壁面取样。探坑中的积雪采样方法为：从顶部开始，按固定间隔将一块平整的镀锌铁板插入积雪中，将铁板上方的积雪刮入融样罐中。两种采样方法带来的同位素污染均可忽略不计。所有样品均在塑料罐中融解，随后转移至50毫升塑料瓶中。本次考察共从9个站位获取630份样品，运回澳大利亚后由Ted Vishart、Dick Marriot及高翔群（Gao Xiangqun）在墨尔本开展氧同位素分析。

采样点位的站位/采样桩编号如下：
A028
V140/4（紧邻GC30）
V230/4（紧邻GC37）
V270/1（紧邻GC38）
V300/1（紧邻GC39）
V350/1（紧邻GC40）
V400/1（紧邻GC41）
V450/1（紧邻GC42）
V630/1（紧邻GC47）

电子表格的列项依次为：
1. 序列编号
2. 冰芯深度（米）
3. 氧同位素值：该数值为每毫升O¹⁶中O¹⁸的比值，以千分比（而非百分比）形式表示。