Comment on “On the steric and mass-induced contributions to the annual sea level variations in the Mediterranean Sea” by David García et al.
Comment on “On the steric and mass-induced contributions to the annual sea level variations in the Mediterranean Sea” by David García et al.
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David García 等人对“关于地中海年度海平面变化的空间和质量引起的贡献”的评论。
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
I. Fukumori
中科院分区：
文献类型：
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作者：
L. Fenoglio;J. Kusche;M. Becker;I. Fukumori
[1]Garcia等人[2006年]（以下简称GCDVG）根据卫星测高、海洋建模和重力恢复和气候实验重力测量，对地中海质量引起的海平面变化进行了分析。特别是，GCDVG发现高度计海平面变化之间的一致性校正的空间效应和来自重力恢复和气候实验（GRACE）的海洋质量的变化。GCDVG表明，海平面变化的年周期（SLVtotal）是由其空间部分（SLVsteric）的变化和盆地平均质量（SLVmass）是最大的2月。他们得出结论，当海平面上升（下降）时，地中海实际上正在失去（获得）质量。[2]GCDVG似乎使用了不切实际的大的空间海平面变化（SLVsteric）的估计和忽略大陆储水量的变化，可以显着影响GRACE测量在地中海。下文通过审查地中海相关的个别流域平均值并与其他研究结果进行比较，依次审查这些问题。特别是，Fenoglio-Marc等人[2006年]（以下简称FKB）在对地中海进行的一项类似研究中发现，空间效应仅占年海平面变化总量的60%左右，SLV质量的年周期在11月达到最大值，同时也发现了高度测量和GRACE测量之间的一致性。
[1] Garcia et al. [2006] (hereafter referred to as GCDVG) present an analysis of mass-induced sea level variation (SLVmass) of the Mediterranean Sea based on satellite altimetry, ocean modeling and Gravity Recovery and Climate Experiment (GRACE) gravity measurements. In particular, GCDVG find consistency between altimeter sea level variations corrected for steric effects and changes in oceanic mass derived from Gravity Recovery and Climate Experiment (GRACE). GCDVG show that the annual cycle of the sea level variability (SLVtotal) is dominated by changes in its steric part (SLVsteric) and that the basin average of mass (SLVmass) is maximum in February. They conclude that, when the sea level is rising (falling) the Mediterranean Sea is actually losing (gaining) mass. [2] GCDVG appear to use an unrealistically large estimate of steric sea level variability (SLVsteric) and neglect changes in continental water storage that can significantly affect GRACE measurements over the Mediterranean Sea. These issues are examined in turn below by reviewing relevant individual basin averages of the Mediterranean Sea in comparison to results of other studies. In particular, while also finding consistency between altimetry and GRACE measurements, Fenoglio-Marc et al. [2006] (hereafter referred to as FKB), in a similar study of the Mediterranean Sea, find steric effects only accounting for about 60% of the total annual sea level variability and the annual cycle of SLVmass having a maximum in November.