Carbon uptake and change in net primary productivity of oasis-desert ecosystem in arid western China with remote sensing technique
文献类型：期刊论文
| 作者 | Zhang Jie3; Pan Xiaoling1; Gao Zhiqiang2 ; Shi Qingdong1; Lu Guanghui1
|
| 刊名 | 地理学报：英文版
 |
| 出版日期 | 2006 |
| 卷号 | 16.0期号:003页码:315 |
| 关键词 | 干旱生态系统 初级生产力 沙漠 光谱 |
| ISSN号 | 1009-637X |
| 英文摘要 | Arid and semi-arid ecosystems exhibit a spatially complex biogeophysical structure. According to arid western special climate-vegetation characters, the fractional cover of photosynthetic vegetation （PV）, non-photosynthetic vegetation （NPV）, bare soil and water are unmixed, using the remote sensing spectral mixture analysis. We try the method to unmix the canopy funation structure of arid land cover in order to avoid the differentiation of regional vegetation system and the disturbance of environmental background. We developed a modified production efficiency model NPP-PEM appropriate for the arid area at regional scale based on the concept of radiation use efficiency. This model refer to the GLO-PEM and CASA model was driven with remotely sensed observations, and calculates not just the conversion efficiency of absorbed photosynthetically active radiation but also the carbon fluxes that determine net primary productivity （NPP）. We apply and validate the model in the Kaxger and Yarkant river basins in arid western China. The NPP of the study area in 1992 and 1998 was estimated based on the NPP-PEM model. The results show that the improved PEM model, considering the photosynthetical activation of heterogeneous functional vegetation, is in good agreement with field measurements and the existing literature. An accurate agreement （R2= 0.85, P〈0.001） between the estimates and the ground-based measurement was obtained. The spatial distribution of mountain-oasis-desert ecosystem shows an obvious heterogeneous carbon uptake. The results are applicable to arid ecosystem studies ranging from characterizing carbon cycle, carbon flux over arid areas to monitoring change in mountain-oasis-desert productivity, stress and management. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/155051]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Institute of Arid Ecology ＆ Environment, Xinjiang University 2.Institute of Geographic Sciences and Natural Resources Research, CAS 3.Department of Urban and Resources Sciences, Nanjing University |
| 推荐引用方式 GB/T 7714 | Zhang Jie,Pan Xiaoling,Gao Zhiqiang,et al. Carbon uptake and change in net primary productivity of oasis-desert ecosystem in arid western China with remote sensing technique[J]. 地理学报：英文版,2006,16.0(003):315. |
| APA | Zhang Jie,Pan Xiaoling,Gao Zhiqiang,Shi Qingdong,&Lu Guanghui.(2006).Carbon uptake and change in net primary productivity of oasis-desert ecosystem in arid western China with remote sensing technique.地理学报：英文版,16.0(003),315. |
| MLA | Zhang Jie,et al."Carbon uptake and change in net primary productivity of oasis-desert ecosystem in arid western China with remote sensing technique".地理学报：英文版 16.0.003(2006):315. |
入库方式： OAI收割
来源：地理科学与资源研究所
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