NWIPB OpenIR
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
被引频次:83[WOS]   [WOS记录]     [WOS相关记录]
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.
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