Data



Data Notes



Extracted from Database

20 May 2019

AMRUM (WITTDUEN)

Station Information

Station ID: 1036
Latitude: 54.616667
Longitude: 8.383333
Coastline code: 140
Station code: 2
Country: GERMANY
Time span of data: 1963 – 2016
Completeness (%): 100
MTL Data: 1963-1998
MTL-MSL (mm): -121
Date of last update: 29 Jun 2017

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 AMRUM (WITTDUEN).

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

Plot of annual mean sea level data at AMRUM (WITTDUEN).

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 1999-04-07

data for 1963-85 referred to Normal Null data for 1986- referred to TGZ

Documentation added 2001-06-25

Wittduen - data 1963-85 apparetnly corrected to NN (Normal Null).

Documentation added 2010-08-09

The data for Wittduen was measured to Normal Null which is a German datum related to levels at Potsdam near Berlin. It is similar to ODN in the UK and the NAP in Holland. It is unusual therefore that the station has been made RLR as it 'breaks the rules' of RLR. Data 2000 onwards refers to TGZ.

Documentation added 2016-01-22

Removed documentation dated 2001 Apr 11 stating "Data up to 1997 were high and low waters (mean tide level). MSL thereafter." Review of the documentation indicates that data through 1998 is MTL, with MSL 1999 onwards.

Documentation added 2016-01-26

A value of MTL-MSL=-121 mm has been applied to the RLR data for the period 1963-1998. This value was derived from the entire time series (through 2008) by Thomas Wahl, using the "k factor method" described in Wahl et al., 61, 701-715, 2011.

Documentation added 2017-11-15

Data for 2011 onwards has been supplied using RLR as the datum. Therefore no adjustment needs to be applied to the data.

Data Authority

Bundesamt fur Seeschifffahrt und Hydrographie Hamburg
Bernhard-Nocht-Strasse 78
20359 Hamburg

Documentation added 1993-10-05

FORMERLY THE DEUTSCHES HYDROGRAPHISCHES INSTITUT