The challenges in long-term altimetry calibration for addressing the problem of global sea level change
The challenges in long-term altimetry calibration for addressing the problem of global sea level change
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DOI：
10.1016/j.asr.2012.06.005
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发表时间：
2013-04-15
影响因子：
2.6
通讯作者：
Haines, Bruce J.
中科院分区：
文献类型：
--
作者：
Fu, Lee-Lueng;Haines, Bruce J.
气候变化导致的全球海平面长期变化已成为社会关注的重大问题。卫星测高技术的出现使全球和区域范围的海平面研究现代化。结合对海洋密度的现场观测和对地球重力变化的空间观测，卫星测高已成为监测和了解海平面变化的全球观测系统的一个重要组成部分。要足够准确地测量海平面，以辨别长期趋势，并将自然变化模式与人为强迫相区别，这一挑战在很大程度上取决于高度计校准和验证的长期努力。本文综述了高度表测量系统各组成部分的长期校准问题。内容包括雷达测高、对流层水汽的影响、轨道测定、重力场、验潮仪和地球参考系。维持一个完整的校准工作的必要性和持续到未来的挑战进行了讨论。(C)2012年空间研委会。由爱思唯尔有限公司出版。保留所有权利。
Long-term change of the global sea level resulting from climate change has become an issue of great societal interest. The advent of the technology of satellite altimetry has modernized the study of sea level on both global and regional scales. In combination with in situ observations of the ocean density and space observations of Earth's gravity variations, satellite altimetry has become an essential component of a global observing system for monitoring and understanding sea level change. The challenge of making sea level measurements with sufficient accuracy to discern long-term trends and allow the patterns of natural variability to be distinguished from those linked to anthropogenic forcing rests largely on the long-term efforts of altimeter calibration and validation. The issues of long-term calibration for the various components of the altimeter measurement system are reviewed in the paper. The topics include radar altimetry, the effects of tropospheric water vapor, orbit determination, gravity field, tide gauges, and the terrestrial reference frame. The necessity for maintaining a complete calibration effort and the challenges of sustaining it into the future are discussed. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.