A description of the sea level network in Finland can be found in 'Operational Oceanography: Implementation at the European and Regional scales. 2002 (pp.129-137)'. 1920-1921 Values based on 1 reading per day Prior to 1977 gauge at 65 44 N, 24 33E 1922-1970 Values based on 6 readings per day
Documentation added 2012-01-03
Before the gauge was moved in 1976 the Primary benchmark was 17 4.853m relative to the gauge datum. Following the move from 1977 Primary benchmark was 88002 2.762m relative to gauge datum. This benchmark is no longer in use and was replaced in 1989 with new Primary benchmark 88004 4.942m relative to gauge datum.
Documentation added 2017-01-31
Following the 2016 levelling exercise some adjustments have been made to the benchmark reference heights - at Kemi this was -3mm for BM 88004. The adjustments are a result of more accurate measuring and calculations using the N2000 height system. The RLR diagram has been re-drawn because of this.
Documentation added 2019-11-27
From 2018 onwards the averages of the Finnish sea level data will be based on 1 min observations. Values are calculated in Finnish normal time (EET). The data are relative to the reference surface of the Finnish sea level observations and thus the datum is the tide gauge zero.
Finnish Meteorological Institute Marine Research, Waves and Sea Level Erik Palenin aukio 1 P.O. Box 503 FI - 00101 Helsinki