Geodetic GPS-based analysis of recent crustal motions in Victoria Land (Antarctica)
Geodetic GPS-based analysis of recent crustal motions in Victoria Land (Antarctica)
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基于大地测量 GPS 的维多利亚地（南极洲）近期地壳运动分析
DOI：
10.1016/j.gloplacha.2008.01.001
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发表时间：
2008
影响因子：
3.9
通讯作者：
S. Gandolfi
中科院分区：
文献类型：
--
作者：
A. Zanutta;L. Vittuari;S. Gandolfi
GPS 测量结果是在 VLNDEF（维多利亚变形控制陆地网络）项目框架内收集的，该项目于 1999 年启动，旨在检测维多利亚州北部地区（南极洲）的地壳变形。该网络于1999年建立，由1个自1998年开始观测的常设站（TNB1）和28个定期测量的控制点组成。迄今为止，已经开展了三项完整的活动和部分网络调查。针对 ITRF 内的网络位置，使用无差别方法进行数据处理和分析。基于双差的策略已应用于运动检测。对所有可用数据（定期采集的数据和长期数据）进行了数据处理和结果分析。 1999 年 12 月至 2006 年 2 月期间收集的 GPS 测量结果表明，该区域的平均“绝对”运动为 ve=11.3 毫米/年和 vn=−11.1 毫米/年，岩石抬升率为 vu=2.8 毫米/年。这些值与南极板块运动和该地区的一般冰河后反弹模型一致。 VLNDEF 内的相对运动很小，只有少数点显示速度大于置信水平。
GPS measurements were collected within the framework of the VLNDEF (Victoria Land Network for DEFormation control) project, which was started in 1999 with the aim of detecting crustal deformation in Northern Victoria Land (Antarctica). The network was established in 1999 and is composed of one permanent station (TNB1), which has been observing since 1998, and 28 periodically surveyed control points. Three complete campaigns and some partial surveying of the network have been carried out to date. Data processing and analysis have been performed using an undifferenced approach for the network position within the ITRF. A double-differences-based strategy has been applied for movement detection. The data processing and analysis of results have been carried out for all available data, both periodically acquired and long time series. GPS measurements collected between December 1999 and February 2006 indicate a mean “absolute” motion of the region of ve=11.3 mm/yr and vn=−11.1 mm/yr and rock uplift rates of vu=2.8 mm/yr. These values are consistent with Antarctic plate motion and the general postglacial rebound models of the region. The relative motions within VLNDEF are small and only few points show velocities greater than the confidence levels.