One Tree Island

A Wireless Sensor Network was deployed at One Tree Island in late 2008 and consists of a base station (star on the map) located on the island itself and three network poles (diamonds on the map) one in each of the main lagoons that make up the reef. The design reflects the need to understand lagoonal flushing both in the main lagoon and the three sub-lagoons that make up the main lagoon. The data is paired with deep water moorings located 7km to the west and east of the island to look at the influence of oceanic water on the lagoon of One Tree Island.

Each pole is located in a small 'micro-atoll' or circular structure with the pole in the middle and a thermistor string running from the pole across the floor of the atoll to the outer wall and then down the atoll wall into the lagoon.

Each pole supports a thermistor chain measuring temperature profiles within the lagoons, the pole at RP3 also has a weather station. Above water light (as Photosynethically Active Radiation – PAR) is also measured using a sensor located on the island.

Sensors deployed at One Tree Island

The following sensors have been deployed at One Tree Island as of 2015:

To download a pdf copy of the table below for One Tree Island click here.


Platform Type Sensor Type Sensor Model Depth (LAT)
RP1 Pole Temperature MEA Thermistor 0.1m + 0.2m +
    String (6 sensors)   0.9m + 1.0m +
        1.5m + 2.0m
    Temperature Seabird SBE37 3.1m
    Depth Seabird SBE37 3.1m
    Salinity Seabird SBE37 3.1m
RP2 Pole Temperature MEA Thermistor 0.5m + 1.4m +
    String (6 sensors)   1.6m + 2.5m +
        3.5m + 4.0m
    Temperature Seabird SBE39 4.9m
    Depth Seabird SBE39 4.9m
RP3 Pole Temperature MEA Thermistor 1.0m + 1.5m +
    String (6 sensors)   2.5m + 3.5m +
        4.5m + 5.0m
    Temperature Seabird SBE39 5.5m
    Depth Seabird SBE39 5.5m
Base-station (island) Mast Above water Light (PAR) LiCor LI-192 10m Height