Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

The utility of the eddy covariance techniques as a tool in carbon accounting: tropical savanna as a case study

Lindsay B. Hutley A D , Ray Leuning B , Jason Beringer C and Helen A. Cleugh B
+ Author Affliations
- Author Affliations

A Tropical Savanna CRC and School of Science and Primary Industries, Charles Darwin University, Darwin, NT 0909, Australia.

B CSIRO Marine and Atmospheric Research, PO Box 1666, Canberra, ACT 2601, Australia.

C School of Geography and Environmental Science, Monash University, PO Box 11A, Clayton, Vic. 3800, Australia.

D Corresponding author. Email: lindsay.hutley@cdu.edu.au

Australian Journal of Botany 53(7) 663-675 https://doi.org/10.1071/BT04147
Submitted: 22 September 2004  Accepted: 24 February 2005   Published: 29 November 2005

Abstract

Global concern over rising atmospheric CO2 concentrations has led to a proliferation of studies of carbon cycling in terrestrial ecosystems. Associated with this has been widespread adoption of the eddy covariance method to provide direct estimates of mass and energy exchange between vegetation surfaces and the atmosphere. With the eddy covariance method, fast-response instruments (10–20 Hz) are typically mounted above plant canopies and the fluxes are calculated by correlating turbulent fluctuations in vertical velocity with fluctuations in various scalars such as CO2, water vapour and temperature. These techniques allow the direct and non-destructive measurement of the net exchange of CO2 owing to uptake via photosynthesis and loss owing to respiration, evapotranspiration and sensible heat. Eddy covariance measurements have a high temporal resolution, with fluxes typically calculated at 30-min intervals and can provide daily, monthly or annual estimates of carbon uptake or loss from ecosystems. Such measurements provide a bridge between ‘bottom-up’ (e.g. leaf, soil and whole plant measures of carbon fluxes) and ‘top-down’ approaches (e.g. satellite remote sensing, air sampling networks, inverse numerical methods) to understanding carbon cycling. Eddy covariance data also provide key measurements to calibrate and validate canopy- and regional-scale carbon balance models. Limitations of the method include high establishment costs, site requirements of flat and relatively uniform vegetation and problems estimating fluxes accurately at low wind speeds. Advantages include spatial averaging over 10–100 ha and near-continuous measurements. The utility of the method is illustrated in current flux studies at ideal sites in northern Australia. Flux measurements spanning 3 years have been made at a mesic savanna site (Howard Springs, Northern Territory) and semi-arid savanna (Virginia Park, northern Queensland). Patterns of CO2 and water vapour exchange at diurnal, seasonal and annual scales are detailed. Carbon dynamics at these sites are significantly different and reflect differences in climate and land management (impacts of frequent fire and grazing). Such studies illustrate the utility of the eddy covariance method and its potential to provide accurate data for carbon accounting purposes. If full carbon accounting is implemented, for ideal sites, the eddy covariance method provides annual estimates of carbon sink strength accurate to within 10%. The impact of land-use change on carbon sink strength could be monitored on a long-term basis and provide a valuable validation tool if carbon trading schemes were implemented.


References


Anderson MC, Norman JM, Mecikalski JR, Torn RD, Kustas WP, Basara JB (2004) A multiscale remote sensing model for disaggregating regional fluxes to micrometeorological scales. Journal of Hydrometeorology 5, 343–363.
CrossRef | open url image1

Arya, P (2001). ‘Introduction to micrometeorology.’ (Academic Press: San Diego, CA)

Aubinet M, Heinesch B, Longdoz B (2002) Estimation of the carbon sequestration by a heterogeneous forest: night flux corrections, heterogeneity of the site and inter-annual variability. Global Change Biology 8, 1053–1071.
CrossRef | open url image1

Baldocchi DD, Hicks BB, Meyers TP (1988) Measuring biosphere–atmosphere exchanges of biologically related gases with micrometeorological methods. Ecology 69, 1331–1340. open url image1

Baldocchi D, Valentini R, Running S, Oechel W, Dahlman R (1996) Strategies for measuring and modelling carbon dioxide and water vapour fluxes over terrestrial ecosystems. Global Change Biology 2, 159–168. open url image1

Baldocchi DD, Finnigan JJ, Wilson KW, Paw UKT, Falge E (2000) On measuring net ecosystem carbon exchange in complex terrain over tall vegetation. Boundary-Layer Meteorology 96, 257–291.
CrossRef | open url image1

Baldocchi D, Falge E, Gu LH, Olson R, Hollinger D, Running S, Anthoni P, Bernhofer C, Davis K, Evans R, Fuentes J, Goldstein A, Katul G, Law B, Lee XH, Malhi Y, Meyers T, Munger W, Oechel W, U KTP, Pilegaard K, Schmid HP, Valentini R, Verma S, Vesala T, Wilson K, Wofsy S (2001) FLUXNET: a new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor, and energy flux densities. Bulletin of the American Meteorological Society 82, 2415–2434.
CrossRef |
open url image1

Baldocchi DD (2003) Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems, past, present and future. Global Change Biology 9, 479–492.
CrossRef | open url image1

Barrett D, Hill M, Hutley LB, Beringer J, Xu J, Cook GD, Carter J, Williams RJ (2005) Prospects for improving savanna biophysical models using multiple-constraints model-data assimilation methods. Australian Journal of Botany 53, 689–714. open url image1

Beringer J, Hutley LB, Tapper NJ, Coutts A, Kerley A, O’Grady AP (2003) Fire impacts on surface heat, moisture and carbon fluxes from a tropical savanna in north Australia. International Journal of Wildland Fire 12, 333–340.
CrossRef | open url image1

Beringer J , Hutley LB , Tapper NJ (2004) Savanna fires and their impact on net ecosystem productivity, 26th conference on agricultural and forest meteorology, 23–27 August, Vancouver, BC, Canada. Paper 4.6 (http://ams.confex.com/ams/AFAPURBBIO/techprogram/paper_79342.htm).

Blackmon M, Boville B, Bryan F, Dickinson R, Gent P, Kiehl J, Moritz R, Randall D, Shukla J, Solomon S, Bonan G, Doney S, Fung I, Hack J, Hunke E, Hurrell J, Kutzbach J, Meehl J, Otto-Bliesner B, Saravanan R, Schneider EK, Sloan L, Spall M, Taylor K, Tribbia J, Washington W (2001) The Community Climate System Model. Bulletin of the American Meteorological Society 82, 2357–2376.
CrossRef | open url image1

Bonan GB, Oleson KW, Vertenstein M, Levis S, Zeng XB, Dai YJ, Dickinson RE, Yang ZL (2002) The land surface climatology of the community land model coupled to the NCAR community climate model. Journal of Climate 15, 3123–3149.
CrossRef | open url image1

Chen X, Hutley LB, Eamus D (2003) Carbon balance of a tropical savanna of northern Australia. Oecologia 137, 405–416.
CrossRef | PubMed | open url image1

Cook GD, Heerdegen RG (2001) Spatial variation in the duration of the rainy season in monsoonal Australia. International Journal of Climatology 21, 1723–1732.
CrossRef | open url image1

Cook PG, Hatton TH, Pidsley D, Herczeg AL, Held A, O’Grady A (1998) Water balance of a tropical woodland ecosystem, northern Australia: a combination of micro-meteorological, soil physical and groundwater chemical approaches. Journal of Hydrology 210, 161–177.
CrossRef | open url image1

Davidson EA, Savage K, Verchot LV, Navarro R (2002) Minimizing artefacts and biases in chamber-based measurements of soil respiration. Agricultural and Forest Meteorology 113, 21–37.
CrossRef | open url image1

Denmead OT, Dunin FX, Wong SC, Greenwood EAN (1993) Measuring water use efficiency of eucalypt trees with chambers and micrometeorological techniques. Journal of Hydrology 150, 649–664.
CrossRef | open url image1

DePury DGG, Farquhar GD (1997) A commentary on the use of a sun/shade model to scale from the leaf to a canopy. Agricultural and Forest Meteorology 95, 257–260.
CrossRef | open url image1

Eamus D, Hutley LB, O’Grady AP (2001) Daily and seasonal patterns of carbon and water fluxes above a north Australian savanna. Tree Physiology 21, 977–988.
PubMed |
open url image1

Falge E, Baldocchi D, Tenhunen J, Aubinet M, Bakwin P, Berbigier P, Bernhofer C, Burba G, Clement R, Davis KJ, Elbers JA, Goldstein AH, Grelle A, Granier A, Guomundsson J, Hollinger D, Kowalski AS, Katul G, Law BE, Malhi Y, Meyers T, Monson RK, Munger JW, Oechel W, Paw KT, Pilegaard K, Rannik U, Rebmann C, Suyker A, Valentini R, Wilson K, Wofsy S (2002) Seasonality of ecosystem respiration and gross primary production as derived from FLUXNET measurements. Agricultural and Forest Meteorology 113, 53–74.
CrossRef |
open url image1

Finnigan J (2002) Momentum transfer to complex terrain. Geophysical Monograph Series 129, 285–300. open url image1

Finnigan JJ, Clement R, Malhi Y, Leuning R, Cleugh HA (2003) A re-evaluation of long-term flux measurements techniques part I, averaging and coordinate rotation. Boundary-Layer Meteorology 107, 1–48.
CrossRef | open url image1

Goulden ML, Munger WJ, Fan SM, Daube BC, Wofsy SC (1996) Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation of accuracy. Global Change Biology 2, 69–182. open url image1

Hanan NP, Kabat P, Dolman JA, Elbers JA (1998) Photosynthesis and carbon balance of a Sahelian fallow savanna. Global Change Biology 4, 523–538.
CrossRef | open url image1

House JI, Prentice IC, Ramankutty N, Houghton RA, Heimann M (2003) Reconciling apparent inconsistencies in estimates of terrestrial CO2 sources and sinks. Tellus. Series B, Chemical and Physical Meteorology 55, 345–363. open url image1

Hooper DU, Cardon ZG, Chapin FS, Durant M (2002) Corrected calculations for soil and ecosystem measurements of CO2 flux using the LI-COR 6200 portable photosynthesis system. Oecologia 132, 1–11.
CrossRef | open url image1

Hutley LB, O’Grady AP, Eamus D (2000) Evapotranspiration from eucalypt open-forest savanna of Northern Australia. Functional Ecology 14, 183–194.
CrossRef | open url image1

Isaac PR, Leuning R, Hacker JM, Cleugh HA, Coppin PA, Denmead OT, Raupach MR (2004) Estimation of regional evapotranspiration by combining aircraft and ground-based measurements. Boundary-Layer Meteorology 110, 69–98.
CrossRef | open url image1

IPCC (2001) IPCC Third Assessment Report. Climatic Change. Intergovernmental Panel on Climate Change , Geneva, Switzerland.

Kaminski T, Heimann M (2001) Inverse modeling of atmospheric carbon dioxide fluxes. Science 294, 259.
CrossRef | PubMed | open url image1

Kruijt B, Elbers JA, von Randow C, Araújo AC, Oliveira PJ, Culf A, Manzi AO, Nobre AD, Kabat P, Moors EJ (2004) The robustness of eddy correlation fluxes for Amazon rain forest conditions. Ecological Applications 14, S101–S113. open url image1

Law BE, Falge E, Gu L, Baldocchi DD, Bakwin P, Berbigier P, Davis K, Dolman AJ, Falk M, Fuentes JD, Goldstein A, Granier A, Grelle A, Hollinger D, Janssens IA, Jarvis P, Jensen NO, Katul G, Mahli Y, Matteucci G, Meyers T, Monson R, Munger W, Oechel W, Olson R, Pilegaard K, Paw KT, Thorgeirsson H, Valentini R, Verma S, Vesala T, Wilson K, Wofsy S (2002) Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation. Agricultural and Forest Meteorology 113, 97–120.
CrossRef | open url image1

Leuning, R (2004). Measurements of trace gas fluxes in the atmosphere using eddy covariance, WPL corrections revisited. In ‘Handbook of micrometeorology, a guide for surface flux measurements and analysis’. pp. 119–132. (Kluwer Academic Publishers: Dordrecht, The Netherlands)

Leuning R, Judd MJ (1996) The relative merits of open- and closed-path analysers for measurements of eddy fluxes. Global Change Biology 2, 241–253. open url image1

Leuning R, Kelliher FM, DePury DGG, Schulze E-D (1995) Leaf nitrogen photosynthesis conductance and transpiration scaling from leaves to canopies. Plant, Cell & Environment 18, 1183–1200. open url image1

Leuning R, Cleugh HA, Zegelin S, Hughes D (2005) Carbon and water fluxes over a temperate Eucalyptus forest and a tropical wet/dry savanna in Australia: measurements and comparison with MODIS remote sensing estimates. Agricultural and Forest Meteorology 129, 151–173.
CrossRef |
open url image1

Massman WJ, Lee X (2002) Eddy covariance flux corrections and uncertainties in long-term studies of carbon and energy exchanges. Agricultural and Forest Meteorology 113, 121–144.
CrossRef | open url image1

McGuire AD, Sitch S, Clein JS, Dargaville R, Esser G, Foley J, Heimann M, Joos F, Kaplan J, Kicklighter DW, Meier RA, Melillo JM, Moore B, Prentice I, Ramankutty N, Reichenau T, Schloss A, Tian H, Williams LJ, Wittenberg U (2001) Carbon balance of the terrestrial biosphere in the twentieth century: analyses of CO2, climate and land use effects with four process-based ecosystem models. Global Biogeochemical Cycles 15, 183–206.
CrossRef | open url image1

Miranda AC, Miranda HS, Lloyd J, Grace J, Francey RJ, McIntyre JA, Meir P, Riggan P, Lockwood R, Brass J (1997) Fluxes of carbon, water and energy over Brazilian cerrado: an analysis using eddy covariance and stable isotopes. Plant, Cell & Environment 20, 315–328.
CrossRef | open url image1

Moncrieff JB, Malhi Y, Leuning R (1996) The propagation of errors in long-term measurements of land-atmosphere fluxes of carbon and water. Global Change Biology 2, 231–240. open url image1

Monteny BA, Lhomme JP, Cehbouni A, Troufleau D, Amado M, Sicot M, Verhoef A, Galle S, Said F, Lloyd CR (1997) The role of the Sahelian biosphere on the water and the C cycle during the HAPEX–Sahel experiment. Journal of Hydrology 188–189, 516–535.
CrossRef | open url image1

Mott, JJ , Williams, J , Andrew, MH ,  and  Gillison, AN (1985). Australian savanna ecosystems. In ‘Ecology and management of the world’s savannas’. (Australian Academy of Science: Canberra)

Papale D, Valentini A (2003) A new assessment of European forests carbon exchanges by eddy fluxes and artificial neural network spatialization. Global Change Biology 9, 525–535.
CrossRef | open url image1

Paul KI, Polglase PJ (2004) Prediction of decomposition of litter under eucalypts and pines using the FullCAM model. Forest Ecology and Management 191, 73–92.
CrossRef | open url image1

Paul KI, Polglase PJ, Richards GP (2003) Sensitivity analysis of predicted change in soil carbon following afforestation. Ecological Modelling 164, 137–152.
CrossRef | open url image1

Richards GP (2001) The FullCAM carbon accounting model: development, calibration and implementation for the National Carbon Accounting System, National Carbon Accounting System Technical Report No. 28 , Australian Greenhouse Office, Canberra.

Roderick ML, Farquhar GD, Berry SL, Noble IR (2001) On the direct effect of clouds and atmospheric particles on the productivity and structure of vegetation. Oecologia 129, 21–30.
CrossRef | open url image1

Schulze E-D, Wirth C, Heimann M (2000) Managing forests after Kyoto. Science 289, 2058–2059.
CrossRef | PubMed | open url image1

Steffen W, Noble I, Candell J, Apps M, Schulze E-D, Jarvis PG, Baldocchi DD, Ciais P, Cramer W, Ehleringer J, Farquhar G, Field CB, Ghazi A, Gifford R, Heimann M, Houghton R, Kabat P, Körner C, Lambin E, Linder S, Mooney HA, Murdiyarso D, Post WM, Prentice IC, Raupach M, Schimel DS, Shivdenko A, Valentini R (1998) The terrestrial carbon cycle implications for the Kyoto Protocol. Science 280, 1393–1394.
CrossRef | open url image1

Swinbank WC (1951) The measurement of vertical transfer of heat and water vapor by eddies in the lower atmosphere. Journal of Meteorology 8, 135–145. open url image1

Valentini, R (2003). EUROFLUX: an integrated network for studying the long-term responses of biospheric exchanges. In ‘Fluxes of carbon, water and energy of European forests’. pp. 1–8. (Springer: Berlin)

Valentini R, Matteucci G, Dolman AJ, Schulze E-D, Rebmann C, Granier A, Gross P, Jensen NO, Pilegaard K, Grelle A, Bernhofer C, Grunwald T, Kowalski AS, Vesala T, Rannik U, Berbigier P, Loustau D, Guomundsson J, Thorgeirsson H, Ibrom A, Morgenstern K, Clement R, Moncrieff J, Montagnani L, Minerbi S, Jarvis PG (2000) Respiration as the main determinant of carbon balance in European forest. Nature 404, 861–865.
CrossRef | PubMed | open url image1

Verhoef A, Allen SJ, De Bruin HAR, Jacobs CMJ, Heusinkveld BG (1996) Fluxes of carbon dioxide and water vapour from a Sahelian savanna. Agricultural and Forest Meteorology 80, 231–248.
CrossRef | open url image1

Wang Y-P, Barrett DJ (2003) Estimating regional terrestrial carbon fluxes for the Australian continent using a multiple constraint approach. I. Using remotely sensed data and ecological observations of net primary production. Tellus 55B, 270–289. open url image1

Wang Y-P, Leuning R (1998) A two-leaf model for canopy conductance photosynthesis and portioning of available energy. I. Model description and comparison with a multi-layered model. Agricultural and Forest Meteorology 91, 89–111.
CrossRef | open url image1

Wang YP, Leuning R, Cleugh HA, Coppin PA (2001) Parameter estimation in surface exchange models using non-linear inversion: how many parameters can we estimate and which measurements are most useful? Global Change Biology 7, 495–510.
CrossRef | open url image1

Webb EK, Pearman GI, Leuning R (1980) Correction of flux measurements for density effects due to heat and water vapour transfer. Quarterly Journal of the Royal Meteorological Society 106, 85–100.
CrossRef | open url image1

Williams, RJ , Griffiths, AD ,  and  Allan, G (2002). Fire regimes and biodiversity in the wet–dry tropical savanna landscapes of northern Australia. In ‘Flammable Australia: the fire regimes and biodiversity of a continent’. pp. 281–304. (Cambridge University Press: Cambridge)

Williams RJ, Hutley LB, Cook GD, Russell-Smith J, Edwards A, Chen X (2004) Assessing the carbon sequestration potential of mesic savannas in the Northern Territory, Australia: approaches, uncertainties and potential impacts of fire. Functional Plant Biology 31, 415–422.
CrossRef | open url image1

Williams RJ, Zerihun A, Montagu K, Hoffman M, Hutley LB, Chen X (2005) Allometry for estimating aboveground tree biomass in tropical and subtropical eucalypt woodlands: towards general predictive equations. Australian Journal of Botany 53, 607–619. open url image1

Wilson KB, Baldocchi DD, Aubinet M, Berbigier P, Bernhofer C, Dolman H, Falge E, Field C, Goldstein A, Granier A, Grelle A, Halldor T, Hollinger D, Katul G, Law BE, Lindroth A, Meyers T, Moncrieff J, Monson R, Oechel W, Tenhunen J, Valentini R, Verma S, Vesala T, Wofsy S (2002) Energy partitioning between latent and sensible heat flux during the warm season at FLUXNET sites. Water Resources Research 38, 1294.
CrossRef |
open url image1

Woinarski JCZ, Milne DJ, Wanganeen G (2001) Changes in mammal population in relatively intact landscapes of Kakadu National Park, Northern Territory, Australia. Austral Ecology 26, 360–370.
CrossRef | open url image1

Xiao XM, Hollinger D, Aber J, Goltz M, Davidson EA, Zhang QY, Moore B (2004) Satellite-based modeling of gross primary production in an evergreen needleleaf forest. Remote Sensing of Environment 89, 519–534.
CrossRef | open url image1








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