Net ecosystem productivity of temperate grasslands in northern China: An upscaling study
文献类型：期刊论文
| 作者 | Zhang, Li1; Guo, Huadong; Jia, Gensuo2; Wylie, Bruce3; Gilmanov, Tagir4; Howard, Danny5; Ji, Lei6; Xiao, Jingfeng7; Li, Jing1; Yuan, Wenping8 |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 184页码:71-81 |
| 关键词 | Flux tower Moderate resolution imaging spectroradiometer (MODIS) Net ecosystem production (NEP) Normalized difference vegetation index (NDVI) Piecewise regression |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2013.09.004 |
| 文献子类 | Article |
| 英文摘要 | Grassland is one of the widespread biome types globally, and plays an important role in the terrestrial carbon cycle. We examined net ecosystem production (NEP) for the temperate grasslands in northern China from 2000 to 2010. We combined flux observations, satellite data, and climate data to develop a piece-wise regression model for NEP, and then used the model to map NEP for grasslands in northern China. Over the growing season, the northern China's grassland had a net carbon uptake of 158 +/- 25 g Cm-2 during 2000-2010 with the mean regional NEP estimate of 126 TgC. Our results showed generally higher grassland NEP at high latitudes (northeast) than at low latitudes (central and west) because of different grassland types and environmental conditions. In the northeast, which is dominated by meadow steppes, the growing season NEP generally reached 200-300 g Cm-2. In the southwest corner of the region, which is partially occupied by alpine meadow systems, the growing season NEP also reached 200-300 g C m(-2). In the central part, which is dominated by typical steppe systems, the growing season NEP generally varied in the range of 100-200 g Cm-2. The NEP of the northern China's grasslands was highly variable through years, ranging from 129 (2001) to 217 gCm(-2) growing season(-1) (2010). The large interannual variations of NEP could be attributed to the sensitivity of temperate grasslands to climate changes and extreme climatic events. The droughts in 2000, 2001, and 2006 reduced the carbon uptake over the growing season by 11%, 29%, and 16% relative to the long-term (2000-2010) mean. Over the study period (2000-2010), precipitation was significantly correlated with NEP for the growing season (R-2 = 0.35, p-value < 0.1), indicating that water availability is an important stressor for the productivity of the temperate grasslands in semi-arid and arid regions in northern China. We conclude that northern temperate grasslands have the potential to sequester carbon, but the capacity of carbon sequestration depends on grassland types and environmental conditions. Extreme climate events like drought can significantly reduce the net carbon uptake of grasslands. (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 | CARBON-DIOXIDE EXCHANGE ; GROSS PRIMARY PRODUCTION ; GREAT-PLAINS GRASSLAND ; CO2 EXCHANGE ; INTERANNUAL VARIABILITY ; PRECIPITATION GRADIENT ; COMBINING MODIS ; ALPINE MEADOW ; WATER-VAPOR ; DRY YEAR |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000328666400007 |
| 出版者 | ELSEVIER |
| 资助机构 | International Cooperation and Exchanges NSFC [41120114001] ; Director Innovation Foundation of Center for Earth Observation and Digital Earth, CAS [Y2ZZ19101B] ; USGS [08HQCN0005, G13PC00028] ; USGS Land Change Science Program ; National Science Foundation (NSF) [1065777] ; NASA [NNX11AL32G] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27275]  |
| 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 Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China 2.Beijing Normal Univ, Acad Disaster Reduct & Emergency Management, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm East Asia TEA, Beijing 100029, Peoples R China 4.US Geol Survey, Earth Resources Observat & Sci EROS Ctr, Sioux Falls, SD 57198 USA 5.S Dakota State Univ, Dept Nat Resource Management, Brookings, SD 57007 USA 6.USGS EROS Ctr, Sioux Falls, SD 57198 USA 7.USGS EROS Ctr, ASRC InuTeq, Sioux Falls, SD 57198 USA 8.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA 9.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 10.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Li,Guo, Huadong,Jia, Gensuo,et al. Net ecosystem productivity of temperate grasslands in northern China: An upscaling study[J]. AGRICULTURAL AND FOREST METEOROLOGY,2014,184:71-81. |
| APA | Zhang, Li.,Guo, Huadong.,Jia, Gensuo.,Wylie, Bruce.,Gilmanov, Tagir.,...&Kato, Tomomichi.(2014).Net ecosystem productivity of temperate grasslands in northern China: An upscaling study.AGRICULTURAL AND FOREST METEOROLOGY,184,71-81. |
| MLA | Zhang, Li,et al."Net ecosystem productivity of temperate grasslands in northern China: An upscaling study".AGRICULTURAL AND FOREST METEOROLOGY 184(2014):71-81. |
入库方式： OAI收割
来源：植物研究所
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