The parameters available for download are listed below along with a description and the unit of the parameter.
The difference in the three sea level parameters lies in the reference level.
|Data update frequency|
Available for Denmark
|sealev_dvr||cm||Sea level relative to DVR90 (Danish Vertical Reference 1990)||10 min*||x||Recommended when looking at data from DMI's stations after January 1st 1997|
|sealev_ln||cm||Sea level relative to local zero for the station||10 min*||x||Recommended when looking at data from DMI's stations before Januar 1st 1997|
|sea_reg||cm||Sea level registration||10 min*||x|
Recommended when looking at data from Kystdirektoratet / Coastal Authority. Data fra the Coastal Authority is measured in DVR90.
|tw||°C||Water temperature||10 min||x||Water temperature is a support value, which is required for calculating the sea level for a certain type of tide gauge. The water temperature is measured inside the harbor at a depth of a couple of meters relatively to the undisturbed sea surface. The measurement is therefore not standardized and should be used with this reservation.|
*Since medio 2001 sea level has been meassured every 10 minutes. Before that sea level was meassured every 15 minutes, 30 minutes and for the oldest data every hour on the hour.
The tide gauge stations around Denmark meassure the water level and at some stations the water temperature as well.
The oceanObs service provides data from 1889. However measurements are not available for all stations as far back as 1889. Click here for page displaying the historical availability for each parameter at each station. The noted year is the first year with observations for the given parameter and station.