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The Moving Boundaries of Sea Level Change

机译：海平面变化的移动边界

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摘要

As ice sheets gain or lose mass, and as water moves between the continents and the ocean, the solid Earth deforms and the gravitational field of the planet is perturbed. Both of these effects lead to regional patterns in sea level change that depart dramatically from the global average. Understanding these patterns will lead to better constraints on the various contributors to the observed sea level change and, ultimately, to more robust projections of future changes. In both of these applications, a key step is to apply a correction to sea level observations, based on data from tide gauges, satellite altimetry, or gravity, to remove the contaminating signal that is due to the ongoing Earth response to the last ice age. Failure to accurately account for this so-called glacial isostatic adjustment has the potential to significantly bias our understanding of the magnitude and sources of present-day global sea level rise. This paper summarizes the physics of several important sources of regional sea level change. Moreover, we discuss several promising strategies that take advantage of this regional variation to more fully use sea level data sets to monitor the impact of climate change on the Earth system.
机译：随着冰盖增加或减少质量，以及水在各大洲与海洋之间移动，固体地球会变形，并且地球的引力场也会受到干扰。这两种影响都导致海平面变化的区域格局与全球平均水平大相径庭。了解这些模式将导致对观察到的海平面变化的各种因素有更好的约束，并最终对未来的变化做出更可靠的预测。在这两种应用中，关键步骤是根据潮汐仪，卫星测高仪或重力数据对海平面观测值进行校正，以消除由于地球对上一个冰河期的持续响应而造成的污染信号。 。如果不能准确地解释这种所谓的冰川恒压调整，则可能会严重影响我们对当今全球海平面上升幅度和来源的理解。本文总结了区域海平面变化的几个重要来源的物理学。此外，我们讨论了几种有前途的策略，这些策略利用了这种区域差异来更充分地利用海平面数据集来监视气候变化对地球系统的影响。

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  • 来源
    《Oceanography》 |2011年第2期|p.24-39|共16页
  • 作者

    MARK E. TAMISIEA; JERRY X. MITROVICA;

  • 作者单位

    National Oceanography Centre,Liverpool, UK;

    Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA;

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