Seasonally detrended Secchi disk depths at Port Hacking (no significant trend;
P = 0.44), 2009–14 Source: Australian Ocean Data Network, see https://portal.aodn.org.au/
Data used by the Department of Environment and Energy to produce graph (d) of Figure MAR31 in the Marine theme of the 2016 State of the Environment Report, available at http://www.soe.environment.gov.au
Data for parts a), b), c) and d) all on data.gov.au