Data



Data Notes



Extracted from Database

22 Apr 2019

HELGEROA

Station Information

Station ID: 1113
Latitude: 58.995212
Longitude: 9.856379
Coastline code: 40
Station code: 310
Country: NORWAY
Time span of data: 1965 – 2018
Completeness (%): 76
Date of last update: 22 Jan 2019

Green Arrow: Current Station
Yellow Marker: Neighbouring RLR Station
Red Marker: Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Tide Gauge Data

Plot of monthly mean sea level data at HELGEROA.

Link to larger image of monthly data plot.
Download monthly mean sea level data.

Plot of annual mean sea level data at HELGEROA.

Link to larger image of annual data plot.
Download annual mean sea level data.

Download metric sea level data. Use only with extreme caution.
NOTE: If some of the data are red in the plots above, the 'flag for attention' is set. Please see the documentation below.

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Helgeroa 040/310 RLR(1966) is 8.3m below BM F38 N29

Documentation added 1995-03-30

Tide gauge network modernised, new equipment installed in 1987

Documentation added 2009-01-28

Following the input of revised data values station made Metric awaiting datum information.

Documentation added 2009-04-06

2007/8 mean sea level values entered as METRIC only awaiting confirmation of a datum query.

Documentation added 2009-10-27

The Norwegian Mapping Authority have revised their datasets. Whole dataset is now referred to TGBM F38 N29 which is 2.312m above TGZ. As a result RLR has been re-calculated year chosen was 1984 RLR value before 6.988.Revised RLR factor is now 6.088m

Documentation added 2012-09-05

For information on sea level rise along the Norwegian coast see paper "Contributions to sea level variability along the Norwegian coast for 1960-2010" by K. Richter, J.E.O. Nilsen and H. Drange.

Documentation added 2015-11-17

The PSMSL has been notified by the Norwegian Authority that the tide gauge at Helgeroa is sinking. The rate of sinking has been confirmed as 0.22mm/year. With the supply of the 2014 sea level data a revised dataset beginning January 1988 has been supplied. Future data will be supplied with the correction applied.

Documentation added 2018-01-25

Monthly mean value for December 1987 has been updated using values supplied by the Norwegian Mapping Authority.

Data Authority

Norwegian Mapping Authority
Hydrographic Service
Po. Box 60
4001 Stavanger