Precipitation amount, seasonality and frequency regulate carbon cycling of a semi-arid grassland ecosystem in Inner Mongolia, China: A modeling analysis
文献类型：期刊论文
| 作者 | Peng, Shushi; Piao, Shilong5; Shen, Zehao; Ciais, Philippe4; Sun, Zhenzhong; Chen, Shiping3 ; Bacour, Cedric4; Peylin, Philippe4; Chen, Anping1
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| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
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| 出版日期 | 2013 |
| 卷号 | 178页码:46-55 |
| 关键词 | Precipitation amount Precipitation seasonality Precipitation frequency Grassland Net primary production Net ecosystem production Heterotrophic respiration |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2013.02.002 |
| 文献子类 | Article |
| 英文摘要 | Over the last century, precipitation has shown significant changes, reflecting both natural variability and radiative forcing changes from greenhouse gases and aerosols. Arid and semi-arid ecosystems are particularly sensitive to changes in precipitation regimes. In this study, we investigate how variation in annual total, seasonal distribution and frequency of precipitation affect CO2 fluxes of semi-arid grassland in Inner Mongolia. To this aim, we combine eddy-covariance measurements with a process-based model (ORCHIDEE). First, the ORCHIDEE parameters were optimized using half-hourly CO2 flux data and actual precipitation forcing. Second, the response of CO2 fluxes to altered precipitation scenarios is computed using the model with optimized parameters. Our results show that modeled net primary production (NPP) responds non-linearly to increased vs. decreased rainfall. Re-allocating precipitation from other seasons to spring enhances annual NPP and net ecosystem production (NEP). By contrast, re-allocating more precipitation to autumn was found to decrease annual NPP and NEP. Increasing the frequency of heavy rainfall days (PF10 (mm), days with precipitation more than 10 mm) induces a positive response of simulated NPP during the growing season. However, the increase of the frequency of moderately rainy days (PF5-10 mm, days with precipitation between 5 mm and 10 mm) rather increases soil heterotrophic respiration. Taken together, our modeling results are consistent with that of grassland field manipulation experiments. This study highlights the importance of changes in precipitation seasonality and frequency for semi-arid grassland. Further investigations should focus on testing the ability of models to reproduced manipulation experiment data, and on evaluating the performances of climate models to reproduce rainfall intensity/frequency in semi-arid areas. (c) 2013 Elsevier B.V. All rights reserved. |
| 学科主题 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| 出版地 | AMSTERDAM |
| 电子版国际标准刊号 | 1873-2240 |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; WATER DYNAMICS ; CLIMATE-CHANGE ; TEMPERATURE ; RESPONSES ; BIOMES ; CO2 ; VARIABILITY ; VEGETATION ; REDUCTION |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000322349800006 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; National Basic Research Program of China(National Basic Research Program of China) ; Foundation for Sino-EU research cooperation of Ministry of Science and Technology of China ; European Commission's Seventh Framework Programme ([FP7]) |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27995]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 2.Princeton Univ, Dept Ecol, Princeton, NJ 08544 USA 3.CEA CNRS UVSQ, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China 5.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Shushi,Piao, Shilong,Shen, Zehao,et al. Precipitation amount, seasonality and frequency regulate carbon cycling of a semi-arid grassland ecosystem in Inner Mongolia, China: A modeling analysis[J]. AGRICULTURAL AND FOREST METEOROLOGY,2013,178:46-55. |
| APA | Peng, Shushi.,Piao, Shilong.,Shen, Zehao.,Ciais, Philippe.,Sun, Zhenzhong.,...&Chen, Anping.(2013).Precipitation amount, seasonality and frequency regulate carbon cycling of a semi-arid grassland ecosystem in Inner Mongolia, China: A modeling analysis.AGRICULTURAL AND FOREST METEOROLOGY,178,46-55. |
| MLA | Peng, Shushi,et al."Precipitation amount, seasonality and frequency regulate carbon cycling of a semi-arid grassland ecosystem in Inner Mongolia, China: A modeling analysis".AGRICULTURAL AND FOREST METEOROLOGY 178(2013):46-55. |
入库方式： OAI收割
来源：植物研究所
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