1948 - 1958 values based on readings of high and low waters
Documentation added 1991-06-11
Diamond Harbour 500/131 RLR(1964) is 8.6m below BM 4/2
Documentation added 1994-08-04
For a discussion of interannual variability of sea level along the coasts of Pakistan and India, see Clarke and Liu, Journal of Physical Oceanography, 24, 1224, 1994.
Documentation added 2002-12-06
SMRC Newsletter Jul-Dec 2001 reports high E coast correlation with SOI and MSL. MSL is much higher during La Nina tropical cyclones than during El Nino.
Documentation added 2010-09-15
The original datum and benchmark was BM 97 6.060m above the datum for 1881-1885. In 1948 the benchmark was changed to BM 4/2 4.869m above chart datum. In 1965 the benchmark was again changed to BM 2014 8.37m relative to chart datum. This remains the primary benchmark.
Documentation added 2016-01-13
We have changed the first line above, indicating that the MTL ends in 1958, not 1956 as was previously stated. We have verified that the values in the database are those from Pub. Sci. 20, in which they were indicated as MTL.
Documentation added 2016-01-22
A value of MTL-MSL=-49 mm has been applied to the RLR data for the period 1948-1958. This value was derived from the average of three differences in the annual MSL and MTL listed for the station in Pub. Sci. 24. Note that no correction has been applied to the metric data.
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