Abstract
Abstract Recent studies reported a uniform global sea level acceleration during the satellite altimetry era (1993–2017) by analyzing globally averaged satellite altimetry measurements. Here, we discuss potential omission errors that were not thoroughly addressed in detecting and estimating the reported global sea level acceleration in these studies. Our analyses results demonstrate that the declared acceleration in recent studies can also be explained equally well by alternative kinematic models based on previously well-established multi-decadal global mean sea level variations of various origins, which suggests prudence before declaring the presence of an accelerating global mean sea level with confidence during the satellite altimetry era.
Highlights
Our analyses results demonstrate that the declared acceleration in recent studies can be explained well by alternative kinematic models based on previously well-established multi-decadal global mean sea level variations of various origins, which suggests prudence before declaring the presence of an accelerating global mean sea level with con dence during the satellite altimetry era
Evidence for the global mean sea level, GMSL, rising faster during the 20th and 21st centuries with global warming is an important indicator in assessing anthropogenic contributions to the climate change mechanisms.We examined various components of the global sea level variability, whose presence makes it di cult to detect the global sea level acceleration that may be due to natural internal climate variability or anthropogenic causes or both
We analyzed monthly and globally averaged satellite altimetry, SA, global sea level time series to demonstrate that one of the most important approaches to earliest possible detection of a signi cant GMSL acceleration lies in recognizing and separating the e ect of natural internal forcing of the oceans compounded with the variability of astronomical origin that are not limited to the SA era
Summary
Evidence for the global mean sea level, GMSL, rising faster during the 20th and 21st centuries with global warming is an important indicator in assessing anthropogenic contributions to the climate change mechanisms.We examined various components of the global sea level variability, whose presence makes it di cult to detect the global sea level acceleration that may be due to natural internal climate variability or anthropogenic causes or both. The e ect of the high autocorrelation must be accounted for in estimating velocity and acceleration of the GMSL rise and their statistical signi cance, and in sea level predictions (İz, 2019).
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