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首页> 外文期刊>Journal of geodynamics >Long-term crustal deformation monitored by gravity and space techniques at Medicina, Italy and Wettzell, Germany
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Long-term crustal deformation monitored by gravity and space techniques at Medicina, Italy and Wettzell, Germany

机译：通过意大利的Medicina和德国的Wettzell的重力和空间技术监测了长期地壳变形

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摘要

Series of gravity recordings at the stations Medicina (Italy) and Wettzell (Germany) are investigated to separate seasonal gravity variations from long-term trends in gravity. The findings are compared to height variations monitored by continuous GPS observations. To study the origin of these variations in height and gravity the environmental parameters at the stations are included in the fact finding. In Medicina, a clear seasonal signal is visible in the gravity and height data series, caused by seasonal fluctuations in the atmosphere including mass redistribution, the ocean, groundwater but also by geo-mechanical effects such as soil consolidation and thermal expansion of the structure supporting the GPS antenna. In Wettzell, no seasonal effect could be clearly identified, and the long-term trend in gravity is mainly caused by ground water variations. The successful combination of height and gravity series with the derived ratio of gravity to height changes indicates that the long-term trends in height and gravity are most likely due to mass changes rather than to tectonic movements.
机译：研究了意大利Medicina和Wettzell（德国）站的一系列重力记录，以将季节性重力变化与重力的长期趋势分开。将结果与通过连续GPS观测监视的高度变化进行比较。为了研究这些高度和重力变化的起因，事实发现中包括了站点的环境参数。在Medicina，重力和高度数据系列中可以看到清晰的季节信号，这是由大气的季节波动（包括质量重新分布，海洋，地下水）引起的，也由地球机械效应（如土壤固结和支撑结构的热膨胀）引起的GPS天线。在Wettzell中，没有明确的季节影响，重力的长期趋势主要是由地下水变化引起的。高度和引力序列的成功结合以及推导的重力与高度变化之比表明，高度和重力的长期趋势最可能是由于质量变化而不是构造运动。

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