Mean sea level and tidal change in Ireland since 1842: a case study of Cork

Abstract. Knowledge of regional changes in mean sea level and local tides are crucial to inform effective climate adaptation. An essential element is the availability accurate observations level. Sea data Republic Ireland, prior establishment National Tide Gauge Network mid-2000s, limited but belie a wealth historical available archival form. In this study, we digitize records located Cork Harbour, from 1842 show how short-duration (6–8 weeks), high-quality with large interval present can accurately tidal changes. We consider error sources detail. estimate for main M2 constituent that accuracy these measurements 1 % 2 min amplitude phase, respectively, once adjustments seasonal nodal effects made. Our estimates cm level, atmospheric results stability change component, 4 phase over period 177 years, rise 40 Harbour area 2019, approximately line global trends plus glacial isostatic adjustment. More broadly, careful seasonal, nodal, corrections, together knowledge benchmark provenance, historic, survey-oriented