New determinations of ocean tides are extracted from high-rate Global Positioning System (GPS) solutions at nine stations sitting on the Ross Ice Shelf. Five are multi-year time series. Three older time series are only 2–3 weeks long. These are not ideal, but they are still useful because they provide the only in situ tide observations in that sector of the ice shelf. The long tide-gauge observations from Scott Base and Cape Roberts are also reanalysed. They allow determination of some previously neglected tidal phenomena in this region, such as third-degree tides, and they provide context for analysis of the shorter datasets. The semidiurnal tides are small at all sites, yet M2 undergoes a clear seasonal cycle, which was first noted by Sir George Darwin while studying measurements from the Discovery expedition. Darwin saw a much larger modulation than we observe, and we consider possible explanations - instrumental or climatic - for this difference.

中文翻译：

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罗斯冰架西北部潮汐的新测定

从位于罗斯冰架上的九个站点的高速全球定位系统 (GPS) 解决方案中提取了新的海潮测定结果。五是多年时间序列。三个较旧的时间序列只有 2-3 周长。这些并不理想，但它们仍然有用，因为它们提供了唯一的原位在冰架的那个区域进行潮汐观测。还重新分析了斯科特基地和罗伯茨角的长潮汐测量仪观测结果。它们可以确定该地区一些以前被忽视的潮汐现象，例如三度潮汐，并为分析较短的数据集提供背景。半日潮在所有地点都很小，但 M2经历了一个明显的季节循环，这是乔治达尔文爵士在研究来自发现远征。达尔文看到的调制比我们观察到的要大得多，我们考虑了可能的解释——工具或气候——对这种差异。