Macquarie Island represents an important vantage point to measure changing sea levels in the middle of the wild Southern Ocean. Physically measuring sea level in such a harsh environment is a challenge - if the 10 m+ waves don't cause problems, the tons of kelp will. Postgraduate students have worked with the Australian Antarctic Division on a technique for calibrating the unique tide gauge at Macquarie Island . The tide gauge is fitted within an inclined shaft drilled through a coastal headland. Read More