DOI: 10.1016/j.agrformet.2019.107831
论文题名: Partitioning evapotranspiration and its long-term evolution in a dry pine forest using measurement-based estimates of soil evaporation
作者: Qubaja R. ; Amer M. ; Tatarinov F. ; Rotenberg E. ; Preisler Y. ; Sprintsin M. ; Yakir D.
刊名: Agricultural and Forest Meteorology
ISSN: 1681923
出版年: 2020
卷: 281 语种: 英语
英文关键词: Canopy cover
; Evapotranspiration partitioning
; Pine forest
; Semi-arid ecosystem
; Soil chamber
; Soil evaporation and adsorption
Scopus关键词: adsorption
; aridity
; coniferous forest
; estimation method
; evaporation
; evapotranspiration
; index method
; seasonal variation
; soil column
; vegetation cover
; water availability
; water use
; Pinus halepensis
英文摘要: The future of forests and their productivity in dry environments will depend on both water availability through precipitation and ecosystem and plant water use characteristics. It is increasingly recognized that better understanding water use patterns and their response to change depends on our ability to partition evapotranspiration (ET). Here, we use chamber-based direct measurements of soil evaporation (Es) in a semi-arid Pinus halepensis forest to partition ET to Es and tree transpiration (Et), to assess the daily and seasonal changes and to compare annual-scale values with measurements carried out at the same site ten years earlier. The ecosystem is characterized by a high annual Es/ET ratio of 0.26, and an Et/ET of 0.63. Es diminished in the long dry season, but as much as 74 ± 5% of the residual flux was due to the re-evaporation of nighttime moisture adsorption, which may provide critical protection from soil drying. Over the 10 years observation period concurrent increase in the transpiration ratio (TR=Et/ET; +29%) and in leaf area index (LAI; +44%) were observed, with the ratio of TR/LAI remaining constant at ~0.31, and with persistently closed hydrological balance (ET/P of 0.94–1.07). The observed Et/ET values are similar to the estimated global mean values, but are attained at a much higher aridity index (5.5) than the mean one, demonstrating the potential for expanding forestation into dry regions. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159285
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel; Land Development Authority, Keren Kayemet LeIsrael-Jewish National Fund, Eshtaol, Israel
Recommended Citation:
Qubaja R.,Amer M.,Tatarinov F.,et al. Partitioning evapotranspiration and its long-term evolution in a dry pine forest using measurement-based estimates of soil evaporation[J]. Agricultural and Forest Meteorology,2020-01-01,281