Sentences with phrase «tidal gauge estimates»
But, rather than taking that as evidence that the tidal gauge estimates were unreliable (as we discussed in Section 3 & 4), he concluded that the satellite was at fault!
https://globalwarmingsolved.com/
However, as we have seen throughout this section, the tidal gauge estimates the IPCC used to estimate global sea level trends are contaminated by local trends, such as tectonic activity, post-glacial rebound... and the coastal subsidence that Syvitski et al. identified!
Remarkably, it seems that their main justification for applying the adjustments has been that they make their estimates better match the tidal gauge estimates, even though the reason why the satellite measurements were being carried out was because the tidal gauge estimates were unreliable!
Indeed, Ostanciaux et al., 2012 (Abstract; Google Scholar access), explicitly assumed that the satellite estimates were independent of the tidal gauge estimates, for identifying problems in the tidal gauge estimates!
Not exact matches
The sea level rise is estimated (tidal gauge) or guessed at (satellite).
Another approach is to compare tidal gauge - based estimates to satellite - based estimates, e.g., Ostanciaux et al., 2012 (Abstract; Google Scholar access).
But, it turns out that the only satellite estimates which are actually independent of the problematic tidal gauge records are the raw, unadjusted estimates.
In order to use tidal gauges to reliably estimate global sea level changes, researchers have to successfully separate the components of shifting land heights and local sea level variability from any global trends.
Despite the various problems with the tidal gauge data, it is possible that the various estimates of global sea level trends of 1 - 2 or maybe 2 - 3 mm / year might coincidentally be correct.
As these processes are occurring in areas across the world, it will mistakenly introduce a «global sea level rise» bias into estimates constructed from tidal gauges.
Finally, as we discuss here, there are a number of problems with the tidal gauge data, so even that estimate of a 1 foot rise every 100 - 300 years is probably an overestimate.