Amery Ice Shelf - hot water drill borehole, AM03 Seabird MicroCAT CTD moorings at three depths in ocean cavity beneath the shelf - 2011/2012 data

AM03 borehole drilled December 2005.Data being collected at annual re-visits to site.Consult Readme file for detail of data files and formats. A word document providing further information is also available as part of the download.All of the .dat files of data can be viewed with a text editor.2011-2012 data may be final data from the unit owing to battery failure.The original project for this dataset was ASAC 1164, but recent data fall under the auspices of project AAS 4096.Taken from the ASAC_1164 metadata record:Most of the snow falling on inland Antarctica drains via large ice streams and floating ice shelves to the sea where it lost by iceberg calving or as melt beneath the shelves. Ocean interaction beneath the shelves is complicated, and regions of basal refreezing as well as melt occur. These processes are important not only because they are a major component of the Antarctic mass budget, but because they also modify the characteristics of the ocean, influencing the formation of Antarctic Bottom Water which plays a major role in the global ocean circulation. The processes are sensitive to climate change, and shifts in ocean temperature or circulation near Antarctica could lead to the disappearance of all Antarctic ice shelves.The AmeryIce Shelf is the major embayed shelf in East Antarctica, and the subject of considerable previous ANARE investigation. Ocean interaction processes occurring beneath the shelf are only poorly understood, and this project will directly measure water characteristics and circulation in the cavity underneath the ice shelf, and the rates of melt and freezing on the bottom of the shelf. These measurements will be made through a number of access holes melted through the shelf. The project is closely linked with other projects investigating the circulation and interactions in the open ocean to the north of the shelf, and studies of the ice shelf flow and mass budget.There will be child records for each of the following data sets:AM03 borehole* Aquadopp current meter data* Brancker thermistor data* Caliper data* FSI-CTD profile data* Drilling parameters data* Seabird MicroCAT CTD moorings at three depths in ocean cavity beneath the shelf* Video

AM03钻孔于2005年12月完成钻探。该数据集将在每年对该点位进行重访时更新补充数据。有关数据文件与格式的详细说明，请参阅自述文件（Readme file）。另有一份可随下载包一同获取的Word文档，提供更多背景信息。所有后缀为.dat的数据文件均可通过文本编辑器查看。2011至2012年采集的数据可能为该设备的最终有效数据，原因是设备电池失效。
本数据集的原始立项编号为ASAC 1164，后续新增数据则隶属于AAS 4096项目。
以下内容源自ASAC_1164元数据记录：
南极内陆的降雪大多通过大型冰流与浮动冰架汇入海洋，最终以冰山崩解或冰架底部融水的形式脱离冰体。冰架下方的海洋相互作用过程极为复杂，既存在基底消融现象，也会发生底部再冻结过程。此类过程不仅是南极物质平衡的重要组成部分，还会改变海洋的理化特性，进而影响南极底层水的形成——而南极底层水在全球海洋环流中发挥着核心作用。上述过程对气候变化极为敏感，南极附近海域的水温或环流变化，可能导致所有南极冰架的消失。
埃默里冰架（Amery Ice Shelf）是东南极洲主要的海湾型冰架，也是澳大利亚国家南极研究探险队（Australian National Antarctic Research Expeditions, ANARE）此前开展大量考察研究的对象。目前学界对冰架下方的海洋相互作用过程仍知之甚少，本项目将通过在冰架上钻凿多个通道孔，直接测量冰架下方空腔内的海水理化特征与环流情况，以及冰架底部的消融与冻结速率。本项目与多个相关项目紧密协作：包括针对冰架北侧开阔海域的环流与相互作用开展研究的项目，以及针对冰架流动与物质平衡的相关研究。
本数据集包含以下各子数据集对应的子记录：
* AM03钻孔相关数据
* Aquadopp海流计数据
* Brancker热敏电阻数据
* 测径仪数据
* FSI-CTD剖面数据
* 钻探参数数据
* 部署于冰架下方海洋空腔内三个深度的海鸟（Seabird）MicroCAT CTD锚系数据
* 视频数据