Effect of solar radiation on net ecosystem CO2 exchange of alpine meadow on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Fan Yuzhi(范玉枝) ; Zhang Xianzhou ; Wang Jingsheng ; Shi Peili |
| 刊名 | JOURNAL OF GEOGRAPHICAL SCIENCES
 |
| 出版日期 | 2011 |
| 卷号 | 21期号:4页码:666-676 |
| 关键词 | LAND-COVER RESPIRATION TEMPERATURE SOIL PHOTOSYNTHESIS DEPENDENCE VEGETATION GRASSLAND SURFACE CARBON |
| 通讯作者 | Zhang Xianzhou |
| 英文摘要 | On the Tibetan Plateau, the alpine meadow is the most widespread vegetation type. The alpine meadow has a low biological productivity and low vegetation coverage in the growing season. The daytime NEE between the atmosphere and the alpine meadow ecosystem was influenced by solar radiation. To analyze the characteristics of change in NEE and to calculate the parameters related to photosynthesis and respiration in different solar radiation environments, the NEE measurements were taken in Damxung from July to August in 2003, 2004, 2005 and 2006 using the eddy covariance technique. Solar radiation was grouped into three levels according to the net radiation, which was more than 155 W m(-2) d(-1) on clear days, 144 +/- 5W m(-2) d(-1) on partly cloudy days and less than 134 W m(-2) d(-1) on cloudy days. The diurnal relationships between NEE and PAR varied with differences in solar radiation, which was a rectangular hyperbola form on clear days, two different concave curves on partly cloudy days and an irregular triangle form on cloudy days. The mean CO2 absorption rate showed a decreasing trend with increasing solar radiation. The daytime absorption maximum occurred around 10:00 on clear days with an average of slightly less -0.2 mg m(-2) d(-1), around 11:00 on partly cloudy days with an average of about -0.2 mg m(-2) d(-1), and around 12:00 on cloudy days with an average of about -0.25 mg m(-2) d(-1). As solar radiation increased, the A(max) and the Q(10) decreased. However, the R-10 increased and the maximum of the alpha occurred on partly cloudy days. The optimum net solar radiation was about 134-155W m(-2) d(-1), which induced a PAR of about 1800-2000 mu mol m(-2) s(-1) and soil temperature at a depth of 5 cm of about 14 degrees C. Therefore, on the Tibetan Plateau, the alpine meadow ecosystem will have a higher carbon absorption potential while solar radiation decreases in the future. |
| 收录类别 | SCI |
| 资助信息 | The Major Basic Research Development Program of China 2010CB833501;Chinese Academy of Sciences KSCXZ-YW-N-44;IGSNRR, CAS Y0V00230ZZ 2010CB951704 |
| 语种 | 英语 |
| 公开日期 | 2011-07-13 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/5287]  |
| 专题 | 地理科学与资源研究所_研究生部 |
| 推荐引用方式 GB/T 7714 | Fan Yuzhi,Zhang Xianzhou,Wang Jingsheng,et al. Effect of solar radiation on net ecosystem CO2 exchange of alpine meadow on the Tibetan Plateau[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2011,21(4):666-676. |
| APA | Fan Yuzhi,Zhang Xianzhou,Wang Jingsheng,&Shi Peili.(2011).Effect of solar radiation on net ecosystem CO2 exchange of alpine meadow on the Tibetan Plateau.JOURNAL OF GEOGRAPHICAL SCIENCES,21(4),666-676. |
| MLA | Fan Yuzhi,et al."Effect of solar radiation on net ecosystem CO2 exchange of alpine meadow on the Tibetan Plateau".JOURNAL OF GEOGRAPHICAL SCIENCES 21.4(2011):666-676. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。