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柴达木地区沙棘冠层导度特征及模拟

王辉 贺康宁 徐特 刘玉娟 刘颖 张雪

王辉, 贺康宁, 徐特, 刘玉娟, 刘颖, 张雪. 柴达木地区沙棘冠层导度特征及模拟[J]. 北京林业大学学报, 2015, 37(8): 1-7. doi: 10.13332/j.1000-1522.20140457
引用本文: 王辉, 贺康宁, 徐特, 刘玉娟, 刘颖, 张雪. 柴达木地区沙棘冠层导度特征及模拟[J]. 北京林业大学学报, 2015, 37(8): 1-7. doi: 10.13332/j.1000-1522.20140457
WANG Hui, HE Kang-ning, XU Te, LIU Yu-juan, LIU Ying, ZHANG Xue. Characteristics and simulation of the canopy conductance of Hippophae rhamnoides in Qaidam Region of northwestern China[J]. Journal of Beijing Forestry University, 2015, 37(8): 1-7. doi: 10.13332/j.1000-1522.20140457
Citation: WANG Hui, HE Kang-ning, XU Te, LIU Yu-juan, LIU Ying, ZHANG Xue. Characteristics and simulation of the canopy conductance of Hippophae rhamnoides in Qaidam Region of northwestern China[J]. Journal of Beijing Forestry University, 2015, 37(8): 1-7. doi: 10.13332/j.1000-1522.20140457

柴达木地区沙棘冠层导度特征及模拟

doi: 10.13332/j.1000-1522.20140457
基金项目: 

青海省科技计划项目(2014-NK-A4-4)

详细信息
    作者简介:

    王辉,博士生。主要研究方向:水土保持、林业生态工程。Email: huihuicao1986@163.com 地址:100083 北京市清华东路35号北京林业大学水土保持学院。

    责任作者:

    贺康宁,教授,博士生导师。主要研究方向:水土保持、林业生态工程。Email: hkn@bjfu.edu.cn 地址: 同上。

Characteristics and simulation of the canopy conductance of Hippophae rhamnoides in Qaidam Region of northwestern China

  • 摘要: 为了揭示沙棘冠层导度对环境因子的响应规律,评价Jarvis模型在沙棘冠层尺度上的适用性,利用Granier热消散式探针连续测定了青海省柴达木盆地实验站内的沙棘灌丛树干液流,并同步观测气象因子,利用Penman-Monteith方程反推方法,获得了长期连续的冠层导度。在分析沙棘冠层导度动态变化规律的基础上,采用十字交叉法对Jarvis模型进行参数率定和误差分析。结果表明:研究区沙棘冠层导度日变化呈“单峰型”曲线,冠层导度随饱和水汽压差的增加呈负指数关系下降,并与太阳辐射强度呈正相关。基于饱和水汽压差、太阳辐射强度和气温这3个环境变量的Jarvis模型可解释gc变化的81%,且最低相对误差仅11.01%。环境因子对冠层导度(gc)模型精度的影响依次为饱和水汽压差(VPD)>太阳辐射强度(Rs)>气温(T)。

     

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出版历程
  • 收稿日期:  2014-12-10
  • 修回日期:  2014-12-10
  • 刊出日期:  2015-08-31

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