Post on 12-Jul-2015
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OzFlux: The Australian flux and ecosystem research network
Data Path, Access and PublicationPresentation by Dr Peter Isaac, Dr Jason Beringer, Dr Eva van Gorsel and Dr Helen Cleugh
Knowledge of ecosystem water and carbon cycles
Surface fluxesRadiation
MeteorologySoil properties
Ecosystem dynamicsSpatial and temporal
dynamicsContinental & global
budgets
Vegetation typeLeaf area indexGross primary
productSoil moistureHyperspectral
Flux tower network
Remote sensing
Land surface models
Site characteristicsBiomass
Soil carbon & nutrientsLeaf-level photosynthesis
Intensive field campaigns
10-3 10-2 10-1 100 101 102 103 104metres
Length Scale
10-1
100
101
102
103
104
105
106
Leaf Canopy Patch Region
Seconds
Minutes
Days
Yearsseconds
Leaf LevelObservations
Flu
x T
ow
er
Aircraft Fluxes
Aircraft Remote Sensing
Satellite Remote Sensing
Land Surface Model
GCM
Plot LevelObservations
Leaf Level Physiology
assumed to apply
Tim
e Sc
ale
Direct measurement
Indirect measurement(remote sensing)
Modelling
OzFlux Data Types
• Turbulence (u’,v’,w’,T’,q’,c’)– Sampled and stored at 10 Hz (“fast”), retrieved ~monthly– Wind components, temperature, water vapour and CO2
concentration• Meteorological (T,RH,WS,WD,Fsd,Tsoil,Rain etc)
– Sampled at 0.1 Hz (“slow”), stored as 30 minute averages, retrieved ~daily
– Wind speed, direction, temperature, relative humidity, soil temperature, soil moisture, rainfall, CO2 and H2O profiles
• Ancillary– Sampled and stored as required (~daily to monthly)– Leaf area index, soil properties, vegetation morphology
• Intensive campaign– Sampled and stored as required (~1 – 2 yearly)– Photosynthetic properties, above and below ground biomass,
soil carbon, etc
u’, v’, w’, T’
q’,c’
WS, WD, T, RH
Fsd, Fsu, Fld, Flu
Fg, Sws, Tsoil
Rain
10 Hz
0.1 Hz
Fast (10 Hz raw)
Slow (30 minute average)
CR3000data logger
Slow(30 minute average)
Fast (10 Hz)(optional with
ethernet modem)
Modmaxmodem
CF card
OzFlux Data Path: Tower
OzFlux Tower Data Output
• Average data (30 or 60 minute, ASCII files)– surface fluxes
• momentum (Fm), sensible heat (Fh), latent heat (Fe), carbon dioxide (Fc)
– solar and terrestrial radiation• incoming & outgoing shortwave (Fsd & Fsu), incoming and
outgoing longwave (Fld & Flu), net allwave (Fn)
– meteorology• air temperature (T), relative humidity (RH), wind speed
and direction (WS & WD)– soil
• soil temperature (Tsoil), soil moisture (Sws), ground heat flux (Fg)
OzFlux Data Path: Real Time Display
Wombat State ForestVictoria
Requires digcert for access to dialup PC at Monash
Sturt PlainsNorthern Territory
OzFlux Data Path: Web Display
OzFlux Data Path: Processing
CF cardmodemmanual collection
“slow” data30 min. avgASCII files Collate
L1spreadsheet
L1netCDF
Qualitycontrol
Convert &subset
L2netCDF
Post-processing
L3netCDF
Manual
Python
Python
Python
OzFluxDMSWWW
Batch-oriented processingConsistent across all sites
Submission to DMS via webAutomatic publishing from DMS to ANDS
rif-cs
OzFlux Data Management System
OzFlux Network Example
• 9 sites with data collection by modem
• 1/11/2010 to 7/11/2010 inclusive
• Basic QC only (not rotated, no gap fill, no u* threshold)
• Incoming shortwave (Fsd, yellow)• sensible heat (Fh, red)• latent heat (Fe, blue)• Net ecosystem exchange (Fc, green)
Acknowledgements
ARCACCSP DCCEEBushfire CRCTRaCKCSIROJames Cook UniversityQueensland University of TechnologyMonash UniversityUniversity of MelbourneForestry TasmaniaUniversity of AdelaideCharles Darwin UniversityUniversity of Technology, SydneyThe University of SydneyUniversity of Waikato, NZLandcare Research, NZ