Preprints
https://doi.org/10.5194/bg-2023-52
https://doi.org/10.5194/bg-2023-52
28 Mar 2023
 | 28 Mar 2023
Status: a revised version of this preprint was accepted for the journal BG and is expected to appear here in due course.

Regional Assessment and Uncertainty Analysis of Carbon and Nitrogen Balances at cropland scale using the ecosystem model LandscapeDNDC

Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou

Abstract. The assessment of cropland carbon and nitrogen (C & N) balances play a key role to identify cost effective mitigation measures to combat climate change and reduce environmental pollution. In this paper, a biogeochemical modelling approach is adopted to assess all C & N fluxes in a regional cropland ecosystem of Thessaly, Greece. Additionally, the estimation and quantification of the modelling uncertainty in the regional inventory are realized through the propagation of parameter distributions through the model leading to result distributions for modelling estimations. The model was applied on a regional dataset of approximately 1000 polygons deploying model initializations and crop rotations for the 5 major crop cultivations and for a timespan of 8 years. The full statistical analysis on modelling results yields for the C balance carbon input fluxes into the soil of 12.4 ± 1.4 tons C ha-1 yr-1 and output fluxes of 11.9 ± 1.3 tons C ha-1 yr-1, with a resulting average carbon sequestration of 0.5 ± 0.3 tons C ha-1 yr-1. The averaged N influx was 212.3 ± 9.1 kg N ha-1 yr-1 while outfluxes were estimated on average of 198.3 ± 11.2 kg N ha-1 yr-1. The net N accumulation into the soil nitrogen pools was estimated to 14.0 ± 2.1 kg N ha-1 yr-1. The N outflux consist of gaseous N fluxes composed by N2O emissions 2.6 ± 0.8 kg N2O-N ha-1 yr-1, NO emissions of 3.2 ± 1.5 kg NO-N ha-1 yr-1, N2 emissions 15.5 ± 7.0 kg N2-N ha-1 yr-1 and NH3 emissions of 34.0 ± 6.7 kg NH3-N ha-1 yr-1, as well as aquatic N fluxes (only nitrate leaching into surface waters) of 14.± 4.5 kg NO3-N ha-1 yr-1, N fluxes of N removed from the fields in yields, straw and feed of 128.8 ± 8.5 kg N ha-1 yr-1.

Odysseas Sifounakis et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2023-52', Emanuele Lugato, 13 Apr 2023
    • AC1: 'authors reply on RC1', Edwin Haas, 31 May 2023
  • RC2: 'Comment on bg-2023-52', Anonymous Referee #2, 13 Apr 2023
    • AC2: 'authors reply on RC2', Edwin Haas, 31 May 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2023-52', Emanuele Lugato, 13 Apr 2023
    • AC1: 'authors reply on RC1', Edwin Haas, 31 May 2023
  • RC2: 'Comment on bg-2023-52', Anonymous Referee #2, 13 Apr 2023
    • AC2: 'authors reply on RC2', Edwin Haas, 31 May 2023

Odysseas Sifounakis et al.

Odysseas Sifounakis et al.

Viewed

Total article views: 531 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
348 158 25 531 14 12
  • HTML: 348
  • PDF: 158
  • XML: 25
  • Total: 531
  • BibTeX: 14
  • EndNote: 12
Views and downloads (calculated since 28 Mar 2023)
Cumulative views and downloads (calculated since 28 Mar 2023)

Viewed (geographical distribution)

Total article views: 522 (including HTML, PDF, and XML) Thereof 522 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 15 Jan 2024
Download
Short summary
We performed a full assessment of the carbon and nitrogen cycle of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes has been deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation for Greece. The inventory reports as well changes of soil organic carbon and nitrogen stocks in arable soils.
Altmetrics