Grasslands

Dóra Hidy, Attila Machon, László Haszpra, Zoltán Nagy, Krisztina Pintér, Galina Churkina, Balázs Grosz, László Horváth, Zoltán Barcza

Research output: Chapter

1 Citation (Scopus)

Abstract

In this chapter, we examine the effects of site-specific environmental conditions and management activities on water, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes of Hungarian grasslands using two process-based ecosystem models. Biome-BGC is used to simulate the CO2 budget, while DNDC is applied to simulate the CH4 and N2O budgets. Biome-BGC was originally developed to simulate the biogeochemical cycles of natural biomes; therefore,-extension of the model source code was needed to simulate management practices. Besides implementing management modules, the soil water and phenology submodels of Biome-BGC were developed. After the development and extension, the model was calibrated using a Bayesian approach by a novel iterative calibration method. DNDC model consists of two components: the first predicts soil temperature, moisture, alkalinity (pH), soil redox potential, and substrate concentration profiles based on ecological drivers; the other component calculates ammonia, nitrogen monoxide, nitrous oxide, and methane fluxes based on soil environmental conditions. DNDC handles several types of management activities. The simulation results of the models were validated using measured carbon dioxide and latent heat flux data from three Hungarian measurement sites, and also using N 2O and CH4 fluxes measured over Hungarian grasslands. The calibrated Biome-BGC model was used to simulate the long-term effect of different management practices.

Original languageEnglish
Title of host publicationAtmospheric Greenhouse Gases
Subtitle of host publicationThe Hungarian Perspective
PublisherSpringer Netherlands
Pages229-251
Number of pages23
ISBN (Print)9789048199495
DOIs
Publication statusPublished - dec. 1 2011

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ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Hidy, D., Machon, A., Haszpra, L., Nagy, Z., Pintér, K., Churkina, G., Grosz, B., Horváth, L., & Barcza, Z. (2011). Grasslands. In Atmospheric Greenhouse Gases: The Hungarian Perspective (pp. 229-251). Springer Netherlands. https://doi.org/10.1007/978-90-481-9950-1_10