Seasonal variation of CO2 flux and its environmental factors in evergreen coniferous plantation
文献类型：SCI/SSCI论文
| 作者 | Liu Y. F. ; Song X. ; Yu G. R. ; Sun X. M. ; Wen X. F. ; Chen Y. R. |
| 发表日期 | 2005 |
| 关键词 | net ecosystem exchange eddy covariance coniferous plantation red earth hilly area black spruce forest surface-air exchange water-vapor carbon-dioxide eddy-covariance tall vegetation long-term micrometeorological observations energy exchanges net carbon |
| 英文摘要 | The effects of environmental factors on carbon flux were analyzed, the spatial and temporal variation of carbon flux was studied at the two heights of 23 m and 39 m with the eddy covariance technique, and the carbon budget was evaluated for evergreen coniferous plantation in the red earth hilly area during the year 2003. The results showed that photosynthetically active radiation (PAR) and soil temperature are essential factors strongly affecting the net ecosystem exchange (NEE); in the daytime, the response of NEE to PAR shows a rectangular hyperbola trend, and in the nighttime, the significant correlation was observed between soil temperature and soil respiration which was filtered using friction velocity. This ecosystem appeared as a carbon sink along the whole year of 2003, and the carbon flux showed the obvious seasonal fluctuation and diurnal variability. The seasonal peak of NEE occurred in May and June with the daily sum about 0.61-0.67 mg . CO2 m(-2) . s(-1). For the severe drought in the mid-summer, the daily sum was 0.40-0.44 Mg . CO2 m(-2). s(-1) in July which was only 2/3 of that in the last two months. For the lasted drought of the year, the nadir of NEE happened in the winder with the daily sum about -0.29 to -0.35 mg . CO2 . m(-2) . s(-1). The sink intensity of the ecosystem was about -0.553 to -0.645 kg . Cm-2 per year in 2003. |
| 出处 | Science in China Series D-Earth Sciences |
| 卷 | 48 |
| 页 | 123-132 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1006-9313 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23399]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Liu Y. F.,Song X.,Yu G. R.,et al. Seasonal variation of CO2 flux and its environmental factors in evergreen coniferous plantation. 2005. |
入库方式： OAI收割
来源：地理科学与资源研究所
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