Portland data frame has 26304 rows and 2 variables. It
gives hourly sea-levels in metres (above Tide Gauge Zero) recorded
by the tide gauge within the (UTC) years of 2012-2014. The sea-levels
are in the second column. The first column is a POSIXct object
giving the dates and times in UTC.
Portland is one of the sites currently used for the Australian Baseline Sea-Level Monitoring Project (ABSLMP). Hourly data for these sites is available from the Australian Bureau of Meteorology.
To obtain the sea-level in AHD (Australian Height Datum), you will need to subtract 0.507 metres from the values given in the dataset.
This data frame contains the following columns:
A POSIXct object where times are in UTC.
The sea-level in metres above Tide Gauge Zero. Any missing or erroneous data points are set to NA.
Australian Bureau of Meteorology.