evidence: Misleading: The claim that scientists were caught "adjusting" sea level data misrepresents the process scientists use to account for potential errors in historical sea level data. [...] The claim that "scientists were caught ‘adjusting’ sea level data to create false impression of rising oceans" misrepresents approaches used by scientists to account for potential errors in historical sea level data. Instruments used to measure sea level, called tide gauges, may be replaced or moved to new locations over time. To calculate actual changes in sea level despite movements of the tide gauges, sea level data is compared to a stable benchmark at each sampling site. The process of adjusting data based on benchmarks is not arbitrary, as Thomas Frederikse explains in the reviewer comments below. [...] Aden [in Yemen] is one of these records for which levelling data is available[6]. The station shows a clear rise in sea level of about 12 cm since ~1900. Now basically, the authors [of the refuted study] call this full levelling data "arbitrary", come up with some random alternative "adjustments", not backed by any reasonable argument, and voila, their manipulated sea-level data doesn’t show any sea-level rise anymore. Then they infer from their falsified data, based on this and two other records that global sea level is stable. Sea-level reconstructions, which typically include hundreds of tide-gauge records, unanimously show that sea level has risen by 15 to 25 cm since 1900.