Simulation and prediction of nitrous oxide emission by the water and nitrogen management model on the Tibetan plateau

Yangong Du, Xiaowei Guo, Guangmin Cao, Bin Wang, Guoyan Pan, De Li Liu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Process-based simulation models have been used to assess the characteristics of N2O emission and to examine the potential impacts of climate change in grassland ecosystems. Temporal N2O fluxes from the soil-atmosphere interface were monitored in this study continuously for two years by using flux chamber measurements and were simulated by using the water and nitrogen management model (WNMM_NSWDPI version) on the Tibetan plateau. The model predictions of N2O flux in an alpine meadow agreed well with the observed values in 2013 and 2014 at daily and monthly scales. Annual emissions of the model output and the measured data agreed closely with lower than 4% relative deviation. Therefore, we concluded that the model captured the key driving process of N2O formulation in which nitrification was the predominant process, contributing to 72.8% and 64.8% in 2013 and 2014, respectively. The average annual N2O emission flux from 1961 to 2014 was 2.02 ± 0.04 kg N2O-ha-1. We further identified that future moderately increases in precipitation could partially reduce the positive response of N2O flux to global warming on the Tibetan Plateau.

Original languageEnglish
Pages (from-to)49-56
Number of pages8
JournalBiochemical Systematics and Ecology
Volume65
Early online dateFeb 2016
DOIs
Publication statusPublished - 01 Apr 2016

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