The Impact of P(e)clet Effect and Leaf Water Content Variation on Canopy-scale Leaf Water 18sO-H2O Enrichment

摘要：

The 18O-H2O composition of leaf water provide unique information regarding the contribution of terrestrial vegetation to the global CO2 and H:O cycles. In this paper, a modeling investigation was employed to investigate processes controlling the isotopic leaf water. We included in a standard LSM, two nonsteady state theories of leaf water isotopic composition and a canopy kinetic fractionation factor. Our model simulations showed that the P(e)clet effect and leaf water content variation were less important than the non steady state effect on the temporal dynamies of the water isotopic exchange. Model sensitivity analysis suggested that precise energy budgets observation and canopy temperature simulation were important for the model performance. The scaling from the leaf to the canopy represents an area in need of more research.

关键词： 18O-H2O content leaf water content P(e)clet effect canopy-scale soybean

作者: Wei Xiao Xuhui Lee Xianghua Xu Timothy J. Griffis Kyounghee Kim Lisa R. Welp Qiang Yu

作者单位: Key Laboratory of Meteorological Disaster of Ministry of Education, College of Applied Meteorology,N School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut, USA Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota, USA Scripps Institution of Oceanography, University of California, La Jolla, California, USA Plant Functional Biology & Climate Change Cluster, Department of Environmental Sciences, University

会议类型: 国际会议

会议名称: 2010 International Conference on Application of Mathematics and Physics(2010国际数理科学与气象学术研讨会暨2010空间天气学研讨会 AMP2010)

会议地点: 南京

会议语种:英文

页码: 202-206

在线出版日期: 2010-05-08（万方平台首次上网日期，不代表论文的发表时间）