| Seasonal variation of co2 flux and its environmental factors in evergreen coniferous plantation | |
| Liu, YF; Song, X; Yu, GR; Sun, XM; Wen, XF; Chen, YR | |
| 刊名 | Science in china series d-earth sciences
 |
| 2005-04-01 | |
| 卷号 | 48页码:123-132 |
| 关键词 | Net ecosystem exchange Eddy covariance Coniferous plantation Red earth hilly area |
| ISSN号 | 1006-9313 |
| 通讯作者 | Liu, yf(liuyf@igsnrr.ac.cn) |
| 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. |
| WOS关键词 | BLACK SPRUCE FOREST ; SURFACE-AIR EXCHANGE ; WATER-VAPOR ; CARBON-DIOXIDE ; EDDY-COVARIANCE ; TALL VEGETATION ; LONG-TERM ; MICROMETEOROLOGICAL OBSERVATIONS ; ENERGY EXCHANGES ; NET CARBON |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000229942300012 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2378302 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Liu, YF |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, YF,Song, X,Yu, GR,et al. Seasonal variation of co2 flux and its environmental factors in evergreen coniferous plantation[J]. Science in china series d-earth sciences,2005,48:123-132. |
| APA | Liu, YF,Song, X,Yu, GR,Sun, XM,Wen, XF,&Chen, YR.(2005).Seasonal variation of co2 flux and its environmental factors in evergreen coniferous plantation.Science in china series d-earth sciences,48,123-132. |
| MLA | Liu, YF,et al."Seasonal variation of co2 flux and its environmental factors in evergreen coniferous plantation".Science in china series d-earth sciences 48(2005):123-132. |
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