Data

Alice Springs Mulga Flux Data Release 2023_v2

Terrestrial Ecosystem Research Network
Cleverly, Jamie ; Eamus, Derek ; Faux, Ralph ; Grant, Nicole M ; Li, Zheng
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25901/2jwh-qq50&rft.title=Alice Springs Mulga Flux Data Release 2023_v2&rft.identifier=10.25901/2jwh-qq50&rft.publisher=Terrestrial Ecosystem Research Network&rft.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 (v3.4.15) as described by Isaac et al. (2017). PyFluxPro produces a final, gap-filled product with Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER). Alice Springs Mulga flux station is located on Pine Hill cattle station, near Alice Springs in the Northern Territory. The woodland is characterized by the Acacia aneura canopy, which is 6.5 m tall on average. Elevation of the site is 606 m above sea level, and the terrain is flat. Mean annual precipitation at the nearby (45 km distant) Bureau of Meteorology station is 305.9 mm but ranges between 100 mm in 2009 to 750 mm in 2010. Predominant wind directions are from the southeast and east. The extent of the woodland is 11 km to the east of the flux station and 16 km to the south. The soil is red sandy clay (50:50 sand:clay) overlying a 49 m deep water table. Pine Hill Station is a functioning cattle station that has been in operation for longer than 50 years. The instrument mast is 13.7 m tall. Fluxes of heat, water vapour and carbon are measured using the open-path eddy covariance technique at 11.6 m. Supplementary measurements above the canopy include temperature and humidity (11.6 m), windspeed and wind direction (9.25 m), downwelling and upwelling shortwave and longwave radiation (12.2 m). Precipitation is monitored in a canopy gap (2.5 m). Supplementary measurements within and below the canopy include barometric pressure (1 m), wind speed (2 m, 4.25 m and 6.5 m), and temperature and humidity (2 m, 4.25 m and 6 m). Below ground soil measurements are made in bare soil, mulga, and understory habitats and include ground heat flux (0.08 m), soil temperature (0.02 m – 0.06 m) and soil moisture (0 – 0.1 m, 0.1 – 0.3 m, 0.6 – 0.8 m and 1.0 – 1.2 m). Ancillary measurements include soil water and carbon fluxes, leaf water potential, leaf gas exchange, stem basal area, stem growth, litter production, leaf area index, stem hydraulic conductance, and carbon and water stable isotope ratios. All flux raw data is subject to the quality control process OzFlux QA/QC to generate data from L1 to L6. Levels 3 to 6 are available for re-use. Datasets contain Quality Controls flags which will indicate when data quality is poor and has been filled from alternative sources. For more details, refer to Isaac et al. (2017).Progress Code: completedMaintenance and Update Frequency: biannually&rft.creator=Cleverly, Jamie &rft.creator=Eamus, Derek &rft.creator=Faux, Ralph &rft.creator=Grant, Nicole M &rft.creator=Li, Zheng &rft.date=2024&rft.edition=2023_v2&rft.relation=https://doi.org/10.5194/bg-13-5895-2016&rft.relation=https://doi.org/10.1002/jgrg.20101&rft.relation=https://doi.org/10.1016/j.agrformet.2013.04.020&rft.coverage=Pine Hill cattle station, near Alice Springs in the Northern Territory.&rft.coverage=northlimit=-22.2828; southlimit=-22.2828; westlimit=133.2493; eastLimit=133.2493; projection=EPSG:4326&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_rights=&rft_rights=TERN services are provided on an “as-is” and “as available” basis. Users use any TERN services at their discretion and risk. They will be solely responsible for any damage or loss whatsoever that results from such use including use of any data obtained through TERN and any analysis performed using the TERN infrastructure. <br /><br />Web links to and from external, third party websites should not be construed as implying any relationships with and/or endorsement of the external site or its content by TERN.<br /><br />Please advise any work or publications that use this data via the online form at https://www.tern.org.au/research-publications/#reporting&rft_rights=Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.&rft_subject=climatologyMeteorologyAtmosphere&rft_subject=BIOGEOCHEMICAL PROCESSES&rft_subject=EARTH SCIENCE&rft_subject=SOLID EARTH&rft_subject=GEOCHEMISTRY&rft_subject=LAND PRODUCTIVITY&rft_subject=LAND SURFACE&rft_subject=LAND USE/LAND COVER&rft_subject=EVAPOTRANSPIRATION&rft_subject=ATMOSPHERE&rft_subject=ATMOSPHERIC WATER VAPOR&rft_subject=TERRESTRIAL ECOSYSTEMS&rft_subject=BIOSPHERE&rft_subject=ATMOSPHERIC PRESSURE MEASUREMENTS&rft_subject=ATMOSPHERIC PRESSURE&rft_subject=TURBULENCE&rft_subject=WIND SPEED&rft_subject=WIND DIRECTION&rft_subject=TRACE GASES/TRACE SPECIES&rft_subject=ATMOSPHERIC CHEMISTRY&rft_subject=CARBON DIOXIDE&rft_subject=PHOTOSYNTHETICALLY ACTIVE RADIATION&rft_subject=LONGWAVE RADIATION&rft_subject=SHORTWAVE RADIATION&rft_subject=INCOMING SOLAR RADIATION&rft_subject=ATMOSPHERIC RADIATION&rft_subject=HEAT FLUX&rft_subject=AIR TEMPERATURE&rft_subject=ATMOSPHERIC TEMPERATURE&rft_subject=SURFACE TEMPERATURE&rft_subject=PRECIPITATION AMOUNT&rft_subject=PRECIPITATION&rft_subject=HUMIDITY&rft_subject=SOIL MOISTURE/WATER CONTENT&rft_subject=SOIL TEMPERATURE&rft_subject=ATMOSPHERIC SCIENCES&rft_subject=EARTH SCIENCES&rft_subject=ECOLOGICAL APPLICATIONS&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=Ecosystem Function&rft_subject=ENVIRONMENTAL SCIENCE AND MANAGEMENT&rft_subject=Environmental Monitoring&rft_subject=SOIL SCIENCES&rft_subject=Alice Springs Mulga Flux Station&rft_subject=Kipp&Zonen CNR4&rft_subject=Kipp&Zonen CNR1&rft_subject=net ecosystem productivity (Micromoles per square metre per second)&rft_subject=Micromoles per square metre per second&rft_subject=water vapor partial pressure in air (Kilopascal)&rft_subject=Kilopascal&rft_subject=vertical wind (Meter per Second)&rft_subject=Meter per Second&rft_subject=surface upward flux of available energy (Watt per Square Meter)&rft_subject=Watt per Square Meter&rft_subject=longitudinal component of wind speed (Meter per Second)&rft_subject=gross primary productivity (Micromoles per square metre per second)&rft_subject=surface downwelling shortwave flux in air (Watt per Square Meter)&rft_subject=surface friction velocity (Meter per Second)&rft_subject=water vapor saturation deficit in air (Kilopascal)&rft_subject=mole fraction of carbon dioxide in air (Micromoles per mole)&rft_subject=Micromoles per mole&rft_subject=specific humidity (Kilogram Per Kilogram)&rft_subject=Kilogram Per Kilogram&rft_subject=surface upward mole flux of carbon dioxide (Micromoles per square metre per second)&rft_subject=mole fraction of water vapor in air (Millimoles per mole)&rft_subject=Millimoles per mole&rft_subject=thickness of rainfall amount (Millimetre)&rft_subject=Millimetre&rft_subject=lateral component of wind speed (Meter per Second)&rft_subject=surface upward sensible heat flux (Watt per Square Meter)&rft_subject=mass concentration of water vapor in air (Gram Per Cubic Metre)&rft_subject=Gram Per Cubic Metre&rft_subject=surface downwelling longwave flux in air (Watt per Square Meter)&rft_subject=wind from direction (Degree)&rft_subject=Degree&rft_subject=air temperature (degree Celsius)&rft_subject=degree Celsius&rft_subject=ecosystem respiration (Micromoles per square metre per second)&rft_subject=volume fraction of condensed water in soil (Cubic Metre Per Cubic Metre)&rft_subject=Cubic Metre Per Cubic Metre&rft_subject=downward heat flux at ground level in soil (Watt per Square Meter)&rft_subject=surface net downward radiative flux (Watt per Square Meter)&rft_subject=Monin-Obukhov length (Meter)&rft_subject=Meter&rft_subject=soil temperature (degree Celsius)&rft_subject=water evapotranspiration flux (Unitless)&rft_subject=Unitless&rft_subject=surface upwelling longwave flux in air (Watt per Square Meter)&rft_subject=surface upwelling shortwave flux in air (Watt per Square Meter)&rft_subject=wind speed (Meter per Second)&rft_subject=specific humidity saturation deficit in air (Kilogram Per Kilogram)&rft_subject=net ecosystem exchange (Micromoles per square metre per second)&rft_subject=surface upward latent heat flux (Watt per Square Meter)&rft_subject=surface air pressure (Kilopascal)&rft_subject=relative humidity (Percent)&rft_subject=Percent&rft_subject=magnitude of surface downward stress (Kilograms per metre per square second)&rft_subject=Kilograms per metre per square second&rft_subject=Point Resolution&rft_subject=1 minute - < 1 hour&rft_subject=AU-ASM&rft_subject=Mulga woodlands&rft.type=dataset&rft.language=English Access the data

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TERN services are provided on an “as-is” and “as available” basis. Users use any TERN services at their discretion and risk. They will be solely responsible for any damage or loss whatsoever that results from such use including use of any data obtained through TERN and any analysis performed using the TERN infrastructure.

Web links to and from external, third party websites should not be construed as implying any relationships with and/or endorsement of the external site or its content by TERN.

Please advise any work or publications that use this data via the online form at https://www.tern.org.au/research-publications/#reporting

Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.

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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 (v3.4.15) as described by Isaac et al. (2017). PyFluxPro produces a final, gap-filled product with Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER).

Alice Springs Mulga flux station is located on Pine Hill cattle station, near Alice Springs in the Northern Territory. The woodland is characterized by the Acacia aneura canopy, which is 6.5 m tall on average. Elevation of the site is 606 m above sea level, and the terrain is flat. Mean annual precipitation at the nearby (45 km distant) Bureau of Meteorology station is 305.9 mm but ranges between 100 mm in 2009 to 750 mm in 2010. Predominant wind directions are from the southeast and east. The extent of the woodland is 11 km to the east of the flux station and 16 km to the south. The soil is red sandy clay (50:50 sand:clay) overlying a 49 m deep water table. Pine Hill Station is a functioning cattle station that has been in operation for longer than 50 years. The instrument mast is 13.7 m tall. Fluxes of heat, water vapour and carbon are measured using the open-path eddy covariance technique at 11.6 m. Supplementary measurements above the canopy include temperature and humidity (11.6 m), windspeed and wind direction (9.25 m), downwelling and upwelling shortwave and longwave radiation (12.2 m). Precipitation is monitored in a canopy gap (2.5 m). Supplementary measurements within and below the canopy include barometric pressure (1 m), wind speed (2 m, 4.25 m and 6.5 m), and temperature and humidity (2 m, 4.25 m and 6 m). Below ground soil measurements are made in bare soil, mulga, and understory habitats and include ground heat flux (0.08 m), soil temperature (0.02 m – 0.06 m) and soil moisture (0 – 0.1 m, 0.1 – 0.3 m, 0.6 – 0.8 m and 1.0 – 1.2 m). Ancillary measurements include soil water and carbon fluxes, leaf water potential, leaf gas exchange, stem basal area, stem growth, litter production, leaf area index, stem hydraulic conductance, and carbon and water stable isotope ratios.

Notes

Data Processing

File naming convention

The NetCDF files follow the naming convention below:

SiteName_ProcessingLevel_FromDate_ToDate_Type.nc
  • SiteName: short name of the site
  • ProcessingLevel: file processing level (L3, L4, L5, L6)
  • FromDate: temporal interval (start), YYYYMMDD
  • ToDate: temporal interval (end), YYYYMMDD
  • Type (Level 6 only): Summary, Monthly, Daily, Cumulative, Annual
For the NetCDF files at Level 6 (L6), there are several additional 'aggregated' files. For example:
  • Summary: This file is a summary of the L6 data for daily, monthly, annual and cumulative data. The files Monthly to Annual below are combined together in one file.
  • Monthly: This file shows L6 monthly averages of the respective variables, e.g. AH, Fc, NEE, etc.
  • Daily: same as Monthly but with daily averages.
  • Cumulative: File showing cumulative values for ecosystem respiration, evapo-transpiration, gross primary productivity, net ecosystem exchange and production as well as precipitation.
  • Annual: same as Monthly but with annual averages.

Lineage

All flux raw data is subject to the quality control process OzFlux QA/QC to generate data from L1 to L6. Levels 3 to 6 are available for re-use. Datasets contain Quality Controls flags which will indicate when data quality is poor and has been filled from alternative sources. For more details, refer to Isaac et al. (2017).

Progress Code: completed
Maintenance and Update Frequency: biannually

Notes

Credit
We 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 TERN Alice Springs Mulga site is managed by the University of Technology Sydney, and is funded by TERN.
Purpose
The purpose of the Alice Springs Mulga flux station is to:
  • measure the exchanges of carbon dioxide, water vapour and energy between a semi-arid mulga (Acacia aneura) ecosystem and the atmosphere using micrometeorological techniques
  • study ecosystem, hydrologic and ecophysiologic responses to rainfall variability
  • evaluate the evapotranspiratory cost of assimilation
  • study the partitioning of ecosystem metabolism between the mulga canopy, a seasonal mixed understory (C3 and C4, grass and shrub) and soil components
  • utilise the measurements for paramterising a Soil-Vegetation-Atmosphere Transfer (SVAT) model to evaluate climate change scenarios in North-Central Australia
  • utilise the measurements for parameterising and validating remote sensing measurements over semi-arid mulga ecosystems
  • utilise the measurements for parmaterising and validating the Community Atmosphere-Biosphere Land Exchange (CABLE) model.
Data Quality Information

Data Quality Assessment Scope
local : dataset
<br>Processing levels</br> <br>Under each of the data release directories, the netcdf files are organised by processing levels (L3, L4, L5 and L6):<ul style="list-style-type: disc;"> <li>L3 (Level 3) processing applies a range of quality assurance/quality control measures (QA/QC) to the L1 data. The variable names are mapped to the standard variable names (CF 1.8) as part of this step. The L3 netCDF file is then the starting point for all further processing stages.</li> <li>L4 (Level 4) processing fills gaps in the radiation, meteorological and soil quantities utilising AWS (automated weather station), ACCESS-G (Australian Community Climate and Earth-System Simulator) and ERA5 (the fifth generation ECMWF atmospheric reanalysis of the global climate).</li> <li>L5 (Level 5) processing fills gaps in the flux data employing the artificial neural network SOLO (self-organising linear output map).</li> <li>L6 (Level 6) processing partitions the gap-filled NEE into GPP and ER.</li></ul> Each processing level has two sub-folders ‘default’ and ‘site_pi’:<ul style="list-style-type: disc;"> <li>default: contains files processed using PyFluxPro</li> <li>site_pi: contains files processed by the principal investigators of the site.</li></ul> If the data quality is poor, the data is filled from alternative sources. Filled data can be identified by the Quality Controls flags in the dataset. Quality control checks include: <ul style="list-style-type: disc;"> <li>range checks for plausible limits</li> <li>spike detection</li> <li>dependency on other variables</li> <li>manual rejection of date ranges</li></ul> Specific checks applied to the sonic and IRGA data include rejection of points based on the sonic and IRGA diagnostic values and on either automatic gain control (AGC) or CO<sub>2</sub> and H<sub>2</sub>O signal strength, depending upon the configuration of the IRGA.</br> <br>Alice Springs Mulga Flux Tower was established in 2010, and is currently active. The processed data release is currently ongoing, biannually.</br> <br></br>

Isaac P., Cleverly J., McHugh I., van Gorsel E., Ewenz C. and Beringer, J. (2017). OzFlux data: network integration from collection to curation, Biogeosciences, 14: 2903-2928
doi : https://doi.org/10.5194/bg-14-2903-2017

Created: 2023-10-06

Issued: 2024-01-02

Modified: 2014-07-14

Data time period: 2010-09-03 to 2023-03-08

This dataset is part of a larger collection

133.2493,-22.2828

133.2493,-22.2828

text: Pine Hill cattle station, near Alice Springs in the Northern Territory.

Subjects
1 minute - < 1 hour | AIR TEMPERATURE | ATMOSPHERE | ATMOSPHERIC CHEMISTRY | ATMOSPHERIC PRESSURE | ATMOSPHERIC PRESSURE MEASUREMENTS | ATMOSPHERIC RADIATION | Atmospheric Sciences | ATMOSPHERIC TEMPERATURE | ATMOSPHERIC WATER VAPOR | AU-ASM | Alice Springs Mulga Flux Station | BIOGEOCHEMICAL PROCESSES | BIOSPHERE | CARBON DIOXIDE | Cubic Metre Per Cubic Metre | Degree | EARTH SCIENCE | Earth Sciences | Ecological Applications | Environmental Science and Management | Environmental Sciences | EVAPOTRANSPIRATION | Ecosystem Function | Environmental Monitoring | GEOCHEMISTRY | Gram Per Cubic Metre | HEAT FLUX | HUMIDITY | INCOMING SOLAR RADIATION | Kilogram Per Kilogram | Kilograms per metre per square second | Kilopascal | Kipp&Zonen CNR1 | Kipp&Zonen CNR4 | LAND PRODUCTIVITY | LAND SURFACE | LAND USE/LAND COVER | LONGWAVE RADIATION | Meter | Meter per Second | Micromoles per mole | Micromoles per square metre per second | Millimetre | Millimoles per mole | Monin-Obukhov length (Meter) | Mulga woodlands | PHOTOSYNTHETICALLY ACTIVE RADIATION | PRECIPITATION | PRECIPITATION AMOUNT | Percent | Point Resolution | SHORTWAVE RADIATION | SOIL MOISTURE/WATER CONTENT | Soil Sciences | SOIL TEMPERATURE | SOLID EARTH | SURFACE TEMPERATURE | TERRESTRIAL ECOSYSTEMS | TRACE GASES/TRACE SPECIES | TURBULENCE | Unitless | WIND DIRECTION | WIND SPEED | Watt per Square Meter | air temperature (degree Celsius) | climatologyMeteorologyAtmosphere | degree Celsius | downward heat flux at ground level in soil (Watt per Square Meter) | ecosystem respiration (Micromoles per square metre per second) | gross primary productivity (Micromoles per square metre per second) | lateral component of wind speed (Meter per Second) | longitudinal component of wind speed (Meter per Second) | magnitude of surface downward stress (Kilograms per metre per square second) | mass concentration of water vapor in air (Gram Per Cubic Metre) | mole fraction of carbon dioxide in air (Micromoles per mole) | mole fraction of water vapor in air (Millimoles per mole) | net ecosystem exchange (Micromoles per square metre per second) | net ecosystem productivity (Micromoles per square metre per second) | relative humidity (Percent) | soil temperature (degree Celsius) | specific humidity (Kilogram Per Kilogram) | specific humidity saturation deficit in air (Kilogram Per Kilogram) | surface air pressure (Kilopascal) | surface downwelling longwave flux in air (Watt per Square Meter) | surface downwelling shortwave flux in air (Watt per Square Meter) | surface friction velocity (Meter per Second) | surface net downward radiative flux (Watt per Square Meter) | surface upward flux of available energy (Watt per Square Meter) | surface upward latent heat flux (Watt per Square Meter) | surface upward mole flux of carbon dioxide (Micromoles per square metre per second) | surface upward sensible heat flux (Watt per Square Meter) | surface upwelling longwave flux in air (Watt per Square Meter) | surface upwelling shortwave flux in air (Watt per Square Meter) | thickness of rainfall amount (Millimetre) | vertical wind (Meter per Second) | volume fraction of condensed water in soil (Cubic Metre Per Cubic Metre) | water evapotranspiration flux (Unitless) | water vapor partial pressure in air (Kilopascal) | water vapor saturation deficit in air (Kilopascal) | wind from direction (Degree) | wind speed (Meter per Second) |

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Other Information
Point-of-truth metadata URL

uri : https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/c47bce69-75e3-45e0-a61f-0038df68f33b

Isaac P., Cleverly J., McHugh I., van Gorsel E., Ewenz C. and Beringer, J. (2017). OzFlux data: network integration from collection to curation, Biogeosciences, 14: 2903-2928

doi : https://doi.org/10.5194/bg-14-2903-2017

PyFluxPro

uri : https://github.com/OzFlux/PyFluxPro/wiki