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| DOI | 10.1111/j.1365-2486.2008.01625.x |
| Terrestrial nitrogen cycle simulation with a dynamic global vegetation model | |
| Xu-Ri; Prentice, I. C. | |
| 通讯作者 | Xu-Ri (通讯作者) |
| 发表日期 | 2008 |
| ISSN | 1354-1013 |
| EISSN | 1365-2486 |
| 起始页码 | 1745 |
| 结束页码 | 1764 |
| 卷号 | 14期号:8 |
| 英文摘要 | A global scale Dynamic Nitrogen scheme (DyN) has been developed and incorporated into the Lund-Posdam-Jena (LPJ) dynamic global vegetation model (DGVM). The DyN is a comprehensive process-based model of the cycling of N through and within terrestrial ecosystems, with fully interactive coupling to vegetation and C dynamics. The model represents the uptake, allocation and turnover of N in plants, and soil N transformations including mineralization, N-2 fixation, nitrification and denitrification, NH3 volatilization, N leaching, and N-2, N2O and NO production and emission. Modelled global patterns of site-scale nitrogen fluxes and reservoirs are highly correlated to observations reported from different biomes. The simulation of site-scale net primary production and soil carbon content was improved relative to the original LPJ, which lacked an interactive N cycle, especially in the temporal and boreal regions. Annual N uptake by global natural vegetation was simulated as 1.084 Pg N yr(-1), with lowest values < 1 g N m(-2) yr(-1) (polar desert) and highest values in the range 24-36.5 g N m(-2) yr(-1) (tropical forests). Simulated global patterns of annual N uptake are consistent with previous model results by Melillo et al. The model estimates global total nitrogen storage potentials in vegetation (5.3 Pg N), litter (4.6 Pg N) and soil (>= 67 Pg as organic N and 0.94 Pg as inorganic N). Simulated global patterns of soil N storage are consistent with the analysis by Post et al. although total simulated N storage is less. Deserts were simulated to store 460 Tg N (up to 0.262 kg N m(-2)) as NO3-, contributing 80% of the global total NO3- inventory of 580 Tg N. This model result is in agreement with the findings of a large NO3- pool beneath deserts. Globally, inorganic soil N is a small reservoir, comprising only 1.6% of the global soil N content to 1.5 m soil depth, but the ratio has a very high spatial variability and in hot desert regions, inorganic NO3- is estimated to be the dominant form of stored N in the soil. |
| 关键词 | NET PRIMARY PRODUCTIVITYTRACE GAS EMISSIONSAMMONIA VOLATILIZATIONCLIMATE-CHANGEECOSYSTEM DYNAMICSGENERALIZED-MODELBIOSPHERE MODELN2O PRODUCTIONSOIL-NITROGENNO EMISSIONS |
| 英文关键词 | annual N uptake; dynamic global N cycle model; inorganic N; N cycle; N storage; nitrification-denitrification; terrestrial ecosystem |
| 语种 | 英语 |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| WOS记录号 | WOS:000257712400004 |
| 来源期刊 | GLOBAL CHANGE BIOLOGY
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/257587 |
| 推荐引用方式 GB/T 7714 | Xu-Ri,Prentice, I. C.. Terrestrial nitrogen cycle simulation with a dynamic global vegetation model[J]. 中国科学院青藏高原研究所,2008,14(8). |
| APA | Xu-Ri,&Prentice, I. C..(2008).Terrestrial nitrogen cycle simulation with a dynamic global vegetation model.GLOBAL CHANGE BIOLOGY,14(8). |
| MLA | Xu-Ri,et al."Terrestrial nitrogen cycle simulation with a dynamic global vegetation model".GLOBAL CHANGE BIOLOGY 14.8(2008). |
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