Alterra, Wageningen UR, P.O. Box 47, 6700 AA Wageningen, The Netherlands.
Environ Pollut. 2011 Nov;159(11):3215-22. doi: 10.1016/j.envpol.2011.04.001. Epub 2011 Apr 30.
Nitrous oxide (N(2)O) direct soil emissions from agriculture are often estimated using the default IPCC emission factor (EF) of 1%. However, a large variation in EFs exists due to differences in environment, crops and management. We developed an approach to determine N(2)O EFs that depend on N-input sources and environmental factors. The starting point of the method was a monitoring study in which an EF of 1% was found. The conditions of this experiment were set as the reference from which the effects of 16 sources of N input, three soil types, two land-use types and annual precipitation on the N(2)O EF were estimated. The derived EF inference scheme performed on average better than the default IPCC EF. The use of differentiated EFs, including different regional conditions, allows accounting for the effects of more mitigation measures and offers European countries a possibility to use a Tier 2 approach.
一氧化二氮（N2O）直接来自农业的土壤排放通常使用 1%的默认政府间气候变化专门委员会（IPCC）排放因子（EF）进行估算。然而，由于环境、作物和管理的差异，EF 存在很大的差异。我们开发了一种方法来确定依赖于氮输入源和环境因素的 N2O EF。该方法的起点是一项监测研究，该研究发现 EF 为 1%。该实验的条件被设定为参考，从该参考中估计了 16 种氮输入源、三种土壤类型、两种土地利用类型和年降水量对 N2O EF 的影响。推导出的 EF 推断方案的表现平均优于默认的 IPCC EF。使用差异化的 EF，包括不同的地区条件，可以考虑更多的缓解措施的影响，并为欧洲国家提供使用二级方法的可能性。
