Brief description
This release consists of flux tower measurements of the exchange of energy and mass between the surface and the atmospheric boundary-layer using eddy covariance techniques. Data were processed using PyFluxPro as described by Isaac et al. (2017) for the quality control and post-processing steps. The final, gap-filled product containing Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER) has been produced using the ONEFlux software as described in Pastorello et al. (2020). This data set has been produced as part of the FLUXNET Shuttle project.The Arcturus flux station was located 48km southeast of Emerald, Queensland (GPS coordinates: -23.8587, 148.4746).
It was established in April 2011, stopped measuring in early 2014, and was managed by Geoscience Australia.
The Arcturus flux station was supported largely by CSIRO Marine and Atmospheric Research and was a voluntary member to TERN.
The land use in the surrounding area was largely cropping (predominantly chickpeas or wheat) and grazed pasture (cattle). Elevation of the site was approximately 170m asl and mean annual precipitation was 572mm.
The tower was 5.6m tall with the instrument mast extending a further 1.1m above, totalling a height of 6.7m. Fluxes of water vapour, carbon dioxide and methane were measured using the open-path eddy flux technique. Supplementary measurements included temperature, humidity, windspeed, wind direction, rainfall, incoming and reflected shortwave and longwave radiation and net radiation. Soil moisture content and soil heat fluxes and temperature were also measured.
Lineage
Data collected using standard eddy covariance and meteorological instrumentation on a 5.6m tower at the Emerald site. The data were quality controlled using the PyFluxPro software package, see Isaac et al. (2017), which is available at https://github.com/OzFlux/PyFluxPro. Gap filling and partitioning has been done using the ONEFlux software package, see Pastorello et al. 2020, which is available at https://github.com/fluxnet/ONEFlux.Data Creation
Data is measured using standard micro-meteorological instrumentation on a flux tower.
Data is recorded on a data logger and is collected by the site PI.
Data quality control including removal of data outside plausible ranges, removal of spikes, exclusion of particular date ranges and removal of data based on the dependence of one variable on another is done using PyFluxPro.
Filtering for low-ustar conditions, gap filling and partitioning of NEE into GPP and ER are done using ONEFlux.
Notes
CreditWe at TERN acknowledge the Traditional Owners and Custodians throughout Australia, New Zealand and all nations. We honour their profound connections to land, water, biodiversity and culture and pay our respects to their Elders past, present and emerging.
The purpose of the Arcturus flux station was:
- To gain an understanding of natural background carbon dioxide and methane fluxes in the region prior to carbon sequestration and coal seam gas activities take place.
- To couple natural flux results with high precision greenhouse gas monitoring instruments (including isotope analysis) to be used for atmospheric dispersion modelling.
- To assess the feasibility of using this type of instrumentation for baseline studies prior to industry activities that will be required to monitor and assess CO2 or CH4 leakage to atmosphere in the future.
Data Quality Assessment Scope
local :
dataset
The data have been quality controlled using the PyFluxPro software. Quality control checks applied to the data include:<ul style="list-style-type: disc;">
<li>range checks for plausible limits</li>
<li>spike detection and removal</li>
<li>dependency on other variables</li>
<li>manual rejection of date ranges</li></ul>
<br>
Specific checks applied to the sonic and IRGA data including rejection of points based on the sonic and IRGA diagnostic values and on either automatic gain control (AGC) or CO2 and H2O signal strength, depending upon the configuration of the IRGA.</br>
<br>If the data quality is poor, the meteorological data is filled from ERA5 reanalysis data and fluxes are filled using the Marginal Distribution Sampling method. Filled data can be identified by the Quality Controls flags in the dataset. </br>
<br>The ONEFlux software used to gap fill and partition this data set also applies a Median Absolute Deviation (MAD) filter to the carbon dioxide, latent heat and sensible heat before the gap filling step.</br>
Isaac P., Cleverly J., McHugh I., van Gorsel E., Ewenz C. and Beringer, J. (2017). Oz
doi :
https://doi.org/10.5194/bg-14-2903-2017
Data Quality Assessment Result
local :
Quality Result
No anomalous data detected after quality control.
Created: 2026-03-13
Issued: 2026-04-07
Modified: 2026-04-07
Data time period: 2011-01-01 to 2014-01-01
text: The Emerald flux tower is located approximately 48km southeast of Emerald, Queensland.
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Point-of-truth metadata URL
Isaac P., Cleverly J., McHugh I., van Gorsel E., Ewenz C. and Beringer, J. (2017). OzFlux data: network integration from collection to curation,
doi :
https://doi.org/10.5194/bg-14-2903-2017
PyFluxPro
uri :
https://github.com/OzFlux/PyFluxPro
ONEFlux
uri :
https://github.com/fluxnet/ONEFlux
Pastorello, G., Trotta, C., Canfora, E. et al. The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data. Sci Data 7, 225 (2020).
- URI : geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/52928a56-76e5-4db0-ab9b-69c9b80dfbb5
- global : 52928a56-76e5-4db0-ab9b-69c9b80dfbb5
