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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 12 | Copyright

Special issue: OzFlux: a network for the study of ecosystem carbon and water...

Biogeosciences, 14, 2903-2928, 2017
https://doi.org/10.5194/bg-14-2903-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 19 Jun 2017

Research article | 19 Jun 2017

OzFlux data: network integration from collection to curation

Peter Isaac1, James Cleverly2, Ian McHugh3, Eva van Gorsel4, Cacilia Ewenz5, and Jason Beringer6 Peter Isaac et al.
  • 1OzFlux Central Node, TERN-OzFlux, Melbourne, VIC 3159, Australia
  • 2School of Life Sciences, University of Technology, Sydney, NSW 2007, Australia
  • 3School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC 3800, Australia
  • 4CSIRO Oceans & Atmosphere Flagship, Yarralumla, ACT 2600, Australia
  • 5Airborne Research Australia, Adelaide, SA 5106, Australia
  • 6School of Earth and Environment, University of Western Australia, Crawley, WA 6009, Australia

Abstract. Measurement of the exchange of energy and mass between the surface and the atmospheric boundary-layer by the eddy covariance technique has undergone great change in the last 2 decades. Early studies of these exchanges were confined to brief field campaigns in carefully controlled conditions followed by months of data analysis. Current practice is to run tower-based eddy covariance systems continuously over several years due to the need for continuous monitoring as part of a global effort to develop local-, regional-, continental- and global-scale budgets of carbon, water and energy. Efficient methods of processing the increased quantities of data are needed to maximise the time available for analysis and interpretation. Standardised methods are needed to remove differences in data processing as possible contributors to observed spatial variability. Furthermore, public availability of these data sets assists with undertaking global research efforts. The OzFlux data path has been developed (i) to provide a standard set of quality control and post-processing tools across the network, thereby facilitating inter-site integration and spatial comparisons; (ii) to increase the time available to researchers for analysis and interpretation by reducing the time spent collecting and processing data; (iii) to propagate both data and metadata to the final product; and (iv) to facilitate the use of the OzFlux data by adopting a standard file format and making the data available from web-based portals. Discovery of the OzFlux data set is facilitated through incorporation in FLUXNET data syntheses and the publication of collection metadata via the RIF-CS format. This paper serves two purposes. The first is to describe the data sets, along with their quality control and post-processing, for the other papers of this Special Issue. The second is to provide an example of one solution to the data collection and curation challenges that are encountered by similar flux tower networks worldwide.

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Networks of flux towers present diverse challenges to data collectors, managers and users. For data collectors, the goal is to minimise the time spent producing usable data sets. For data managers, the challenge is making data available in a timely and broad manner. For data users, the quest is for consistency in data processing across sites and networks. The OzFlux data path was developed to address these disparate needs and serves as an example of intra- and inter-network integration.
Networks of flux towers present diverse challenges to data collectors, managers and users. For...
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