A comparison between simulated and measured co2 and water flux in a subtropical coniferous forest
文献类型：期刊论文
| 作者 | Gu Fengxue; Cao Mingkui; Wen Xuefa; Liu Yunfen; Tao Bo |
| 刊名 | Science in china series d-earth sciences
 |
| 出版日期 | 2006-11-01 |
| 卷号 | 49页码:241-251 |
| 关键词 | Ecosystem co2 and water flux Cevsa Eddy covariance Subtropical coniferous forest |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-006-8241-2 |
| 通讯作者 | Cao mingkui(caomk@igsnrr.ac.cn) |
| 英文摘要 | Using data from eddy covariance measurements in a subtropical coniferous forest, a test and evaluation have been made for the model of carbon exchange in the vegetation-soil-atmosphere (cevsa) that simulates energy transfers and water, carbon and nitrogen cycles based on ecophysiological processes. in the present study, improvement was made in the model in calculating lai, carbon allocation among plant organs, litter fall, decomposition and evapotranspiration. the simulated seasonal variations in carbon and water vapor flux were consistent with the measurements. the model explained 90% and 86% of the measured variations in evapotranspiration and soil water content. however, the modeled evapotranspiration and soil water content were lower than the measured systematically, because the model assumed that water was lost as runoff if it was beyond the soil saturation water content, but the soil at the flux site with abundant rainfall is often above water saturated. the improved model reproduced 79% and 88% of the measured variations in gross primary production (gpp) and ecosystem respiration (r-e), but only 31% of the variations in measured net ecosystem exchange (nep) despite the fact that the modeled annual nep was close to the observation. the modeled nep was generally lower in winter and higher in summer than the observations. the simulated responses of photosynthesis and respiration to water vapor deficit at high temperatures were different from measurements. the results suggested that the improved model underestimated ecosystem photosynthesis and respiration in extremely condition. the present study shows that cevsa can simulate the seasonal pattern and magnitude of co2 and water vapor fluxes, but further improvement in simulating photosynthesis and respiration at extreme temperatures and water deficit is required. |
| WOS关键词 | TERRESTRIAL ECOSYSTEM ; CARBON-DIOXIDE ; SEASONAL-VARIATION ; VAPOR EXCHANGE ; DYNAMIC-RESPONSES ; MODELING CARBON ; CLIMATE-CHANGE ; RAIN-FOREST ; TEMPERATE ; ENERGY |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000242721500021 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379841 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Cao Mingkui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu Fengxue,Cao Mingkui,Wen Xuefa,et al. A comparison between simulated and measured co2 and water flux in a subtropical coniferous forest[J]. Science in china series d-earth sciences,2006,49:241-251. |
| APA | Gu Fengxue,Cao Mingkui,Wen Xuefa,Liu Yunfen,&Tao Bo.(2006).A comparison between simulated and measured co2 and water flux in a subtropical coniferous forest.Science in china series d-earth sciences,49,241-251. |
| MLA | Gu Fengxue,et al."A comparison between simulated and measured co2 and water flux in a subtropical coniferous forest".Science in china series d-earth sciences 49(2006):241-251. |
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来源：中国科学院大学
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