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Simulation of greenhouse gases following land-use change to bioenergy crops using the ECOSSE model. A comparison between site measurements and model predictions

Simulation of greenhouse gases following land-use change to bioenergy crops using the ECOSSE model. A comparison between site measurements and model predictions
Simulation of greenhouse gases following land-use change to bioenergy crops using the ECOSSE model. A comparison between site measurements and model predictions
This paper evaluates the suitability of the ECOSSE model to estimate soil greenhouse gas fluxes from short rotation coppice willow (SRC-Willow), short rotation forestry (SRF-Scots Pine) and Miscanthus after land-use change from conventional systems (grassland and arable). We simulate heterotrophic respiration (Rh), nitrous oxide (N2O) and methane (CH4) fluxes at four paired sites in the UK, and compare them to estimates of Rh derived from the ecosystem respiration estimated from eddy covariance (EC) and Rh estimated from chamber (IRGA) measurements, as well as direct measurements of N2O and CH4 fluxes.

Significant association between modelled and EC-derived Rh was found under Miscanthus, with correlation coefficient (r) ranging between 0.54 and 0.70. Association between IRGA-derived Rh and modelled outputs was statistically significant at the Aberystwyth site (r = 0.64) but not significant at the Lincolnshire site (r = 0.29). At all SRC-Willow sites, significant association was found between modelled and measurement-derived Rh (0.44 ? r ? 0.77); significant error was found only for the EC-derived Rh at the Lincolnshire site. Significant association and no significant error were also found for SRF-Scots Pine and perennial grass. For the arable fields, the modelled CO2 correlated well just with the IRGA-derived Rh at one site (r = 0.75). No bias in the model was found at any site, regardless of the measurement type used for the model evaluation.

Across all land-uses, fluxes of CH4 and N2O were shown to represent a small proportion of the total greenhouse gas balance; these fluxes have been modelled adequately on a monthly time-step. This study provides confidence in using ECOSSE for predicting the impacts of future land-use on greenhouse gas balance, at site level as well as at national level.
ECOSSE model, greenhouse gases, miscanthus, SRC, SRF, energy crops, land-use change
1757-1693
1-38
Dondini, M.
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Richards, M.
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Pogson, M.
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McCalmont, J.
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Drewer, J.
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Marshall, R.
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Morrison, R.
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Yamulki, S.
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Harris, Z.M.
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Alberti, G.
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Siebicke, L.
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Taylor, G.
Perks, M.
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Finch, J.
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McNamara, N.P.
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Smith, J.U.
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Smith, P.
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Dondini, M.
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Richards, M.
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Pogson, M.
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McCalmont, J.
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Drewer, J.
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Marshall, R.
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Morrison, R.
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Yamulki, S.
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Harris, Z.M.
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Alberti, G.
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Siebicke, L.
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Taylor, G.
Perks, M.
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Finch, J.
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McNamara, N.P.
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Smith, J.U.
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Smith, P.
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Dondini, M., Richards, M., Pogson, M., McCalmont, J., Drewer, J., Marshall, R., Morrison, R., Yamulki, S., Harris, Z.M., Alberti, G., Siebicke, L., Taylor, G., Perks, M., Finch, J., McNamara, N.P., Smith, J.U. and Smith, P. (2015) Simulation of greenhouse gases following land-use change to bioenergy crops using the ECOSSE model. A comparison between site measurements and model predictions. GCB Bioenergy, 1-38. (doi:10.1111/gcbb.12298). (In Press)

Record type: Article

Abstract

This paper evaluates the suitability of the ECOSSE model to estimate soil greenhouse gas fluxes from short rotation coppice willow (SRC-Willow), short rotation forestry (SRF-Scots Pine) and Miscanthus after land-use change from conventional systems (grassland and arable). We simulate heterotrophic respiration (Rh), nitrous oxide (N2O) and methane (CH4) fluxes at four paired sites in the UK, and compare them to estimates of Rh derived from the ecosystem respiration estimated from eddy covariance (EC) and Rh estimated from chamber (IRGA) measurements, as well as direct measurements of N2O and CH4 fluxes.

Significant association between modelled and EC-derived Rh was found under Miscanthus, with correlation coefficient (r) ranging between 0.54 and 0.70. Association between IRGA-derived Rh and modelled outputs was statistically significant at the Aberystwyth site (r = 0.64) but not significant at the Lincolnshire site (r = 0.29). At all SRC-Willow sites, significant association was found between modelled and measurement-derived Rh (0.44 ? r ? 0.77); significant error was found only for the EC-derived Rh at the Lincolnshire site. Significant association and no significant error were also found for SRF-Scots Pine and perennial grass. For the arable fields, the modelled CO2 correlated well just with the IRGA-derived Rh at one site (r = 0.75). No bias in the model was found at any site, regardless of the measurement type used for the model evaluation.

Across all land-uses, fluxes of CH4 and N2O were shown to represent a small proportion of the total greenhouse gas balance; these fluxes have been modelled adequately on a monthly time-step. This study provides confidence in using ECOSSE for predicting the impacts of future land-use on greenhouse gas balance, at site level as well as at national level.

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Accepted/In Press date: 3 August 2015
Keywords: ECOSSE model, greenhouse gases, miscanthus, SRC, SRF, energy crops, land-use change
Organisations: Centre for Biological Sciences

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Local EPrints ID: 380986
URI: http://eprints.soton.ac.uk/id/eprint/380986
ISSN: 1757-1693
PURE UUID: 43a3506a-0cb4-4933-8a1c-6e43d4072774

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Date deposited: 07 Sep 2015 12:01
Last modified: 14 Mar 2024 21:08

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Contributors

Author: M. Dondini
Author: M. Richards
Author: M. Pogson
Author: J. McCalmont
Author: J. Drewer
Author: R. Marshall
Author: R. Morrison
Author: S. Yamulki
Author: Z.M. Harris
Author: G. Alberti
Author: L. Siebicke
Author: G. Taylor
Author: M. Perks
Author: J. Finch
Author: N.P. McNamara
Author: J.U. Smith
Author: P. Smith

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