Mantyluoto 060/101 RLR(1964) is 9.7m below BM52307
Documentation added 2002-09-24
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)'. 1910-1924 Values based on 1 reading per day. Prior to 1970 gauge at 61 36 N, 21 29 E 1925-1970 Values based on 6 readuings a day
Documentation added 2012-01-03
Prior to the gauge being moved the Primary benchmark 1925-1969 was 52307 4.407m above gauge datum. When the gauge was moved benchmark 1970-1988 was N7101 4.774m relative to the datum. This is no longer used and was replaced by 89110 3.970m relative to gauge datum in 1989.
Documentation added 2017-01-31
Following the 2016 levelling exercise some adjustments have been made to the benchmark reference heights - at Mantyluoto this was +2mm for BM 89110. 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 2017-12-20
Data values for November and December 2014 have been revised by the Finnish Meteorological Institute.
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