Evidence for recent changes may also be seen in relative

However in situ measurements and shorter-term satellite studies in the Indian Ocean indicate sea-level rise is greater than the global mean (Han et al., 2010 and Unnikrishnan and Shankar, 2007). Using the two longer (50 + years) records of Diamond Harbour and Kolkata, (greater confidence is given to 50 + year records, following Douglas, 1991), these observations suggest net subsidence rates are a maximum of approximately 3 mm/yr. For Diamond Harbour, this A66 is similar to ambient point measurements, whilst in Kolkata, the rate is approximately half that of the measured subsidence values.