Reparameterization Required After Model Structure Changes From Carbon Only to Carbon-Nitrogen Coupling
文献类型：期刊论文
| 作者 | Wang, Song1,2; Luo, Yiqi3; Niu, Shuli1,2 |
| 刊名 | JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 14期号:4页码:15 |
| 关键词 | Bayesian probabilistic inversion MCMC model structure model parameterization warming carbon and nitrogen cycles |
| DOI | 10.1029/2021MS002798 |
| 通讯作者 | Niu, Shuli(sniu@igsnrr.ac.cn) |
| 英文摘要 | Prediction of carbon (C) sequestration in terrestrial ecosystems under climate change depends on C-nitrogen (N) interactions. While many newly developed C-N coupling models predict lower C storage than their C-only counterpart models, it has not been carefully examined whether or not such model predictions would be supported by real-world observations. This study is to retrieve knowledge on N cycle from one field warming experiment in an alpine meadow of China so that we can better predict land C sequestration. We estimated two sets of parameters with one C-only model and one C-N coupling model, respectively, with the data assimilation technique. Our results showed that estimated process rates (e.g., senescence and decomposition rates) of organic C from almost all pools except standing litter and leaf are higher with the C-N coupling model than those with the C-only model. The allocation coefficient of C to root estimated with the C-only model was 68.0% and 56.6% smaller than that with the C-N coupling model under the ambient and warming treatments, respectively. Both the C-only and C-N coupling models simulate similar C pool sizes as observed at either the ambient or warming treatment with their respective parameter estimates. Meanwhile, the warming treatment increased the slow soil organic matter (SOM) pool due to decrease in estimated decomposition rate of the slow SOM via parameter fitting and increase in the C input from surface litter. In general, our results suggest that reparameterization is required when we add N processes to a C cycle model to realistically predict the ecosystem dynamics in response to future changes in N availability. |
| WOS关键词 | ORGANIC-MATTER DYNAMICS ; SOIL C ; CLIMATE ; CYCLE ; FEEDBACKS ; RESPONSES ; LITTER |
| 资助项目 | Science Centre project of National Natural Science Foundation of China[31988102] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000783448400001 |
| 资助机构 | Science Centre project of National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/174809]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Res, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA |
| 推荐引用方式 GB/T 7714 | Wang, Song,Luo, Yiqi,Niu, Shuli. Reparameterization Required After Model Structure Changes From Carbon Only to Carbon-Nitrogen Coupling[J]. JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,2022,14(4):15. |
| APA | Wang, Song,Luo, Yiqi,&Niu, Shuli.(2022).Reparameterization Required After Model Structure Changes From Carbon Only to Carbon-Nitrogen Coupling.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,14(4),15. |
| MLA | Wang, Song,et al."Reparameterization Required After Model Structure Changes From Carbon Only to Carbon-Nitrogen Coupling".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 14.4(2022):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。