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Scientia Silvae Sinicae ›› 2012, Vol. 48 ›› Issue (2): 16-21.doi: 10.11707/j.1001-7488.20120203

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Source Area in-FLUX Measurements by FSAM Model over the Populus deltoides Plantation in Yueyang

Wei Yuan1, Gao Shenghua1, Zhang Xudong1, Geng Shaobo2, Zhao Xiaosong3, Jiang Zeping1, Wang Yunlong4   

  1. 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, CAF Beijing 100091;2. Key Laboratory for Soil and Water Conservation & Desertification Combating of Ministry of Education College of Soil and Water Conservation, Beijing Forestry University Beijing 100083;3. State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences Nanjing 210008;4. Nanjing University of Information Science and Technology Nanjing 210044
  • Received:2010-07-17 Revised:2011-12-31 Online:2012-02-25 Published:2012-02-25

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Abstract:

Based on eddy flux data collected in a poplar plantation of Yueyang in 2006, the flux source area was calculated using the FSAM model according to the continuous flux measurement with an open-path eddy covariance system. The results showed that:In the prevailing wind direction(0°~90°), the upwind range of flux source areas(P=0.9) was 110~3 500 m under stable air conditions, while it was 90~1 800 m under unstable air conditions. The range under stable air conditions in the direction of 180°~270°was 110~4 500 m, which was the largest of the three unprevailing wind directions, while under unstable air conditions, the ranges in the three directions were nearly the same (90~1 800 m). In the prevailing wind direction, the source area changed with atmospheric stability and source areas in the growing season are larger than those in the dormant season under the same atmospheric condition. Because of the big fetch, the measurements were able to represent the specific characteristics of the instrument location。

Key words: FSAM (the flux source area model), source area, Populus deltoides plantation

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