Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Seasonal and interannual variation in water vapor and energy exchange over a typical steppe in Inner Mongolia, China | |
Hao, Yanbin; Wang, Yanfen; Huang, Xiangzhong; Cui, Xiaoyong; Zhou, Xiaoqi; Wang, Shiping; Niu, Haishan; Jiang, Gaoming | |
2007-09-11 | |
发表期刊 | AGRICULTURAL AND FOREST METEOROLOGY |
卷号 | 146期号:1-2页码:57-69 |
文章类型 | Article |
摘要 | In this study, we conducted eddy covariance (EC) measurements of water vapor exchange over a typical steppe in a semi-arid area of the Inner Mongolia Plateau, China. Measurement sites were located within a 25-year-old enclosure with a relatively low leaf area index (similar to 1. 5 m(2) m(-2)) and dominated by Leymus chinensis. Energy balance closure was (H + LE) = 17.09 + 0.69 x (Rn - G) (W/m(2); r(2) = 0.95, n = 6596). Precipitation during the two growing seasons of the study period was similar to the long-term average. The peak evapotranspiration in 2004 was 4 mm d(-1), and 3.5 mm d(-1) in 2003. The maximum latent heat flux was higher than the sensible heat flux, and the sensible heat flux dominated the energy budget at midday during the entire growing season in 2003; latent heat flux was the main consumption component for net radiation during the 2004 growing season. During periods of frozen soil in 2003 and 2004, the sensible heat flux was the primary consumption component for net radiation. The soil heat flux component was similar in 2003 and 2004. The decoupling coefficient (between 0.5 and 0.1) indicates that evapotranspiration was strongly controlled by saturation water vapor pressure deficit (VPD) in this grassland. The results of this research suggest that energy exchange and evapotranspiration were controlled by the phenology of the vegetation and soil water content. In addition, the amount and frequency of rainfall significantly affect energy exchange and evapotranspiration upon the Inner Mongolia plateau. (c) 2007 Published by Elsevier B.V.; In this study, we conducted eddy covariance (EC) measurements of water vapor exchange over a typical steppe in a semi-arid area of the Inner Mongolia Plateau, China. Measurement sites were located within a 25-year-old enclosure with a relatively low leaf area index (similar to 1. 5 m(2) m(-2)) and dominated by Leymus chinensis. Energy balance closure was (H + LE) = 17.09 + 0.69 x (Rn - G) (W/m(2); r(2) = 0.95, n = 6596). Precipitation during the two growing seasons of the study period was similar to the long-term average. The peak evapotranspiration in 2004 was 4 mm d(-1), and 3.5 mm d(-1) in 2003. The maximum latent heat flux was higher than the sensible heat flux, and the sensible heat flux dominated the energy budget at midday during the entire growing season in 2003; latent heat flux was the main consumption component for net radiation during the 2004 growing season. During periods of frozen soil in 2003 and 2004, the sensible heat flux was the primary consumption component for net radiation. The soil heat flux component was similar in 2003 and 2004. The decoupling coefficient (between 0.5 and 0.1) indicates that evapotranspiration was strongly controlled by saturation water vapor pressure deficit (VPD) in this grassland. The results of this research suggest that energy exchange and evapotranspiration were controlled by the phenology of the vegetation and soil water content. In addition, the amount and frequency of rainfall significantly affect energy exchange and evapotranspiration upon the Inner Mongolia plateau. (c) 2007 Published by Elsevier B.V. |
关键词 | Eddy Covariance Evapotranspiration Energy Exchange Decoupling Coefficient Soil Water Content Typical Steppe |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
学科领域 | 林业 |
关键词[WOS] | CARBON-DIOXIDE EXCHANGE ; NET ECOSYSTEM EXCHANGE ; TEMPERATE GRASSLAND ; PRAIRIE ; ATMOSPHERE ; CLIMATE ; FLUXES ; FOREST ; VARIABILITY ; EVAPORATION |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
WOS类目 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
WOS记录号 | WOS:000249481900005 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/1254 |
专题 | 中国科学院西北高原生物研究所 |
作者单位 | 1.Chinese Acad Sci, Inst Bot, Lab Quantitat Vegetat Ecol, Beijing 100093, Peoples R China 2.Grad Univ, Chinese Acad Sci, Dept Biol, Beijing 100049, Peoples R China 3.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China 4.Grad Univ, Chinese Acad Sci, Dept Resources & Environm, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Hao, Yanbin,Wang, Yanfen,Huang, Xiangzhong,et al. Seasonal and interannual variation in water vapor and energy exchange over a typical steppe in Inner Mongolia, China[J]. AGRICULTURAL AND FOREST METEOROLOGY,2007,146(1-2):57-69. |
APA | Hao, Yanbin.,Wang, Yanfen.,Huang, Xiangzhong.,Cui, Xiaoyong.,Zhou, Xiaoqi.,...&Jiang, Gaoming.(2007).Seasonal and interannual variation in water vapor and energy exchange over a typical steppe in Inner Mongolia, China.AGRICULTURAL AND FOREST METEOROLOGY,146(1-2),57-69. |
MLA | Hao, Yanbin,et al."Seasonal and interannual variation in water vapor and energy exchange over a typical steppe in Inner Mongolia, China".AGRICULTURAL AND FOREST METEOROLOGY 146.1-2(2007):57-69. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Seasonal and interan(1213KB) | 开放获取 | 使用许可 | 浏览 下载 |
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。
修改评论