Sentences with phrase «tide gages»
Tide gauges are devices used to measure the level of the ocean tides. They provide information on the height of the water at different times and locations along the coast. Full definition
The IPCC famously drew some of its most catastrophic sea level predictions from tide gages in Hong Kong that are on land that is sinking (thus imparting an artificial sea level rise in the data).
climate-skeptic.com
In a 2009 study, the authors used GPS measurement to correct for local vertical movement of the Earth at key tide gages, finding a «global rate of geocentric sea level rise of 1.61 ± 0.19 mm / yr over the past century».
During the last several decades, the upward historical trends, quantified from a small set of California tide gages, have been approximately 20 cm / century, quite similar to that estimated for global mean sea level.
We can see how hard it is to construct long term records on sea level rise, because tide gage records were seldom continuous.
Tide gages in cities located at the edges of where glaciers were located would appear to show that sea levels were rising, while other cities located where the glaciers were centered show that sea levels are falling.
If I understand correctly, both methods try to calibrate their tide gage data by comparing with the satellite data.
certainly doesn't and if you plot out the tide gage data from PSMSL you will find that the timeline over the last 120 is nearly as straight.