We know that sea levels are increasing thanks to the satellite observations, collated by NASA's Goddard Space Flight Center, as well as coastal tide gauge records monitored by Australia's leading science body, the CSIRO. (relevantmagazine.com)
Tide heights near ice shelves can be measured using traditional coastal tide gauges and bottom pressure recorders, while currents can be measured with meters on moorings in the open ocean or deployed through boreholes drilled through ice shelves, which are the floating portions of ice sheets. (eos.org)
Abstract: Mean - sea - level data from coastal tide gauges in the north Indian Ocean wereare used to show that low - frequency variability is consistent among the stations in the basin. (desmogblog.com)