Monitoring Sites - Cape Tribulation

Introduction | Contacts | Purpose | Site Description | Measurements | DEM | Pictures

Site Description

The Cape Tribulation flux station is located in lowland tropical rainforest at the Daintree Rainforest Observatory located near Cape Tribulation, Queensland (GPS coordinates: -16.1056, 145.3778; elevation: 66m). The land is adjacent to the Daintree National Park which is part of the Wet Tropics World Heritage Area (WTWHA).

The site is flanked to the west by coastal ranges rising to more than 1400m and to the east by the Coral Sea. The red clay loam podzolic soils are of metamorphic origin and have good drainage characteristics. The metamorphic rocks grade into granite boulders along Thompson Creek which runs along the northern boundary of the site. The crane site itself is gently sloping but the fetch area makes the site one of very complex terrain.

The forest is classed as complex mesophyll vine forest (type 1a) and has an average canopy height of 25m. The dominant canopy trees belong to the Apocynaceae, Arecaceae, Euphorbiaceae, Lauraceae, Meliaceae, Myristicaceae and Myrtaceae families. The forest is continuous for several kilometres around the crane except for an area 300m due east of the crane, which is regrowth forest.

Annual average rainfall at the site is around 5180mm and is strongly seasonal, with 66% falling between January and April (wet season). Mean daily temperature ranges from 26.6°C in February to 21.2°C in July.

Tropical Cyclone impacts
Tropical cyclones are a frequent occurrence in Far North Queensland. These severe tropical storm systems are natural phenomena which play a major role in determining the ecology of Queensland's tropical lowland rainforests. In March 1999 Tropical Cyclone Rona (Category 3) passed over the Cape Tribulation area causing widespread damage (gusts >170km/h). At the site several large trees fell, nearly all of the remaining trees were stripped of leaves and the lianas towers were torn to ground level.

Australian Canopy Crane
The flux station is mounted at the 45m level on the tower of the Australian Canopy Crane external link.
The canopy crane is a Liebherr 91 EC, freestanding construction tower crane. The crane is 48.5 metres tall with a radius of 55 metres enabling access to 1 hectare of rainforest.

Fluxes of heat, water vapour and carbon dioxide are measured using the open-path eddy covariance technique. Supplementary measurements above the canopy include temperature, humidity, rainfall, total solar, photosynthetically active radiation (PAR) and net radiation.
Heat flux, soil temperature and water content (time domain reflectometry) are measured in proximity to the flux station. Detailed biometric measurements are made at the crane site and all trees have regular (5 yearly) dbh measurements and canopy mapping carried. Monitoring bores (3) are located on site. Leaf litter measurements are carried out on a monthly basis.

 
Modified: 07/22/2019