Cloudy Sky Conditions Promote Net Ecosystem CO_2 Exchange in a Subtropical Coniferous Plantation across Seasons
文献类型：期刊论文
| 作者 | Han Jiayin; Ye Shu; Guo Chuying; Zhang Leiming; Li Shenggong; Wang Huimin |
| 刊名 | Journal of Resources and Ecology
 |
| 出版日期 | 2019 |
| 卷号 | 10期号:2页码:137 |
| 关键词 | 涡度相关 天气条件 散射辐射 晴空指数 净生态系统碳交换 |
| ISSN号 | 1674-764X |
| 英文摘要 | Dynamic changes in solar radiation have an important influence on ecosystem carbon sequestration,but the effects of changes caused by sky conditions on net ecosystem CO_2 exchange (NEE) are unclear.This study analyzed the effects of sunny,cloudy,and overcast sky conditions on NEE using carbon flux and meteorological data for a subtropical coniferous plantation in 2012.Based on one-year data,we found no seasonal variation in the light response curve under various sky conditions.Compared with sunny sky conditions,the apparent quantum yield (α) and potential photosynthetic rate at a light intensity of 150 and 750 W m~(-2) (P_(150) and P_(750)) under cloudy sky conditions increased by an average of 82.3%,217.7%,and 22.5%;α and P_(150) under overcast sky conditions increased by 118.5% and 301% on average.Moderate radiation conditions were more favorable for maximum NEE,while low radiation conditions inhibited NEE.In most cases,when the sunny NEE was used as a baseline for comparison,the relative change in NEE (%NEE) was positive under cloudy sky conditions and negative under overcast sky conditions.The average maximal %NEE under cloudy sky conditions was 42.4% in spring,34.1% in summer,1.6% in autumn and –87.3% in winter.This study indicates that cloudy sky conditions promote photosynthetic rates and NEE in subtropical coniferous plantations. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/155559]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences |
| 推荐引用方式 GB/T 7714 | Han Jiayin,Ye Shu,Guo Chuying,et al. Cloudy Sky Conditions Promote Net Ecosystem CO_2 Exchange in a Subtropical Coniferous Plantation across Seasons[J]. Journal of Resources and Ecology,2019,10(2):137. |
| APA | Han Jiayin,Ye Shu,Guo Chuying,Zhang Leiming,Li Shenggong,&Wang Huimin.(2019).Cloudy Sky Conditions Promote Net Ecosystem CO_2 Exchange in a Subtropical Coniferous Plantation across Seasons.Journal of Resources and Ecology,10(2),137. |
| MLA | Han Jiayin,et al."Cloudy Sky Conditions Promote Net Ecosystem CO_2 Exchange in a Subtropical Coniferous Plantation across Seasons".Journal of Resources and Ecology 10.2(2019):137. |
入库方式： OAI收割
来源：地理科学与资源研究所
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