| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1111/gcb.13341 |
| Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management. | |
| Gerber JS; Carlson KM; Makowski D; Mueller ND; Garcia de Cortazar-Atauri I; Havlik P; Herrero M; Launay M | |
| 发表日期 | 2016 |
| 出处 | Global Change Biology 22 (10): 3383-3394 |
| 出版年 | 2016 |
| 语种 | 英语 |
| 摘要 | With increasing nitrogen (N) application to croplands required to support growing food demand, mitigating N2O emissions from agricultural soils is a global challenge. National greenhouse gas emissions accounting typically estimates N2O emissions at the country scale by aggregating all crops, under the assumption that N2O emissions are linearly related to N application. However, field studies and meta-analyses indicate a nonlinear relationship, in which N2O emissions are relatively greater at higher N application rates. Here we apply a super-linear emissions response model to crop-specific, spatially-explicit synthetic N fertilizer and manure N inputs to provide subnational accounting of global N2O emissions from croplands. We estimate 0.66 Tg of N2O-N direct global emissions circa 2000, with 50% of emissions concentrated in 13% of harvested area. Compared to estimates from the IPCC Tier 1 linear model, our updated N2O emissions range from 20-40% lower throughout Sub-Saharan Africa and Eastern Europe, to >120% greater in some Western European countries. At low N application rates, the weak non-linear response of N2O emissions suggests that relatively large increases in N fertilizer application would generate relatively small increases in N2O emissions. Since aggregated fertilizer data generate underestimation bias in nonlinear models, high-resolution N application data are critical to support accurate N2O emissions estimates. |
| 主题 | Ecosystems Services and Management (ESM) |
| URL | http://pure.iiasa.ac.at/id/eprint/13215/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130679 |
| 推荐引用方式 GB/T 7714 | Gerber JS,Carlson KM,Makowski D,et al. Spatially explicit estimates of N2O emissions from croplands suggest climate mitigation opportunities from improved fertilizer management.. 2016. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Spatially%20explicit（672KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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