Data



Data Notes



Extracted from Database

20 May 2019

AVONMOUTH

Station Information

Station ID: 257
Latitude: 51.507667
Longitude: -2.71275
Coastline code: 170
Station code: 171
Country: UNITED KINGDOM
Time span of RLR data: 1986 – 2000
RLR completeness (%): 83
Time span of metric data: 1924 – 2012
Metric completeness (%): 90
MTL Data: 1959-1972, 1976-1981, 1983-1985
MTL-MSL (mm): 127
Date of last update: 27 Jan 2016

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 AVONMOUTH.

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

Plot of annual mean sea level data at AVONMOUTH.

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.

Additional Data Sources (guide to additional data sources)

Nearby Real Time Stations from VLIZ: sscr, avon

Station Documentation

Link to RLR information.

Documentation added 1993-10-11

1959-72, 1976-81, 1983-85 FCODE=HL, Some months based on incomplete data more details available on request.

Documentation added 1994-09-21

Gauge was a stilling well (instrument made at Port of Bristol to Tidal Institute specification) until the end of 1984 with tabulations supplied by the Port of Bristol authority.From 21 November 1984 the gauge has been an "A Class" bubbler.

Documentation added 2001-01-02

Recent work on vertical land movements in the UK can be found from the University of Nottingham web site:http://ukcogr.iessg.nottingham.ac.uk/~eosi/

Documentation added 2001-03-21

Avonmouth - 170/171 RLR(1992) is 15.8m below TGBM ST 5057 7881

Documentation added 2009-01-28

Treat data 2000 onwards as suspect.

Documentation added 2010-06-08

Although the Avonmouth gauge is still operational the jetty on which the gauge stands is collapsing. A replacement gauge has been installed at Portbury.

Documentation added 2016-01-22

A value of MTL-MSL=127 mm has been derived using from the GESLA2 (high-frequency tide gauge) dataset using harmonic constituents. As the correction is only applied to RLR data and the data during the periods 1959-1972, 1976-1981, and 1983-1985 are metric, it is not used in the data set. Should these periods become RLR in future, however, a correction for MTL-MSL would be needed. The 001 flag has been set only because this correction is highly uncertain.

Data Authority

British Oceanographic Data Centre
National Oceanography Centre
Joseph Proudman Building, 6 Brownlow Street
Liverpool
L3 5DA