Earthquake biases in measurements of Antarctica's sea-level contribution

南极洲海平面贡献测量中的地震偏差

• 批准号: DP170100224
• 负责人: Prof Matt King
• 金额: $ 24.29万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2017
• 资助国家: 澳大利亚
• 起止时间: 2017-09-03 至 2023-09-02
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP170100224
• 关键词: Earthquake; biases; measurements; Antarctica; sea

This project aims to accurately determine Antarctica’s contribution to present-day sea-level. Large technique-specific systematic errors make this uncertain and controversial with the sign of change not agreed. Three of four measurement techniques rely on knowing the solid earth's changing shape or gravity field. Studies have not considered post-seismic deformation, but GPS data show that Antarctica has deformed since the 1998 Magnitude-8.2 Antarctic Plate Earthquake. This project will develop a model of these earthquakes constrained by geodetic data and use the model to estimate Antarctica's contribution to sea-level change. This should enable more confident local, national and international planning. This will benefit society through reducing the sea-level projection uncertainty.

该项目旨在准确确定南极洲对当今海平面的贡献。大的技术特定的系统误差使得这一点具有不确定性和争议性，而且没有达成一致的改变的迹象。四种测量技术中有三种依赖于了解固体地球不断变化的形状或重力场。研究没有考虑震后形变，但GPS数据显示，自1998年南极板块8.2级地震以来，南极洲发生了形变。该项目将开发一个受大地测量数据约束的这些地震的模型，并使用该模型来估计南极洲对海平面变化的贡献。这应使地方、国家和国际规划更加自信。这将通过减少海平面预测的不确定性而造福社会。