自然资源学报 ›› 2015, Vol. 30 ›› Issue (9): 1436-1448.doi: 10.11849/zrzyxb.2015.09.002

• 资源生态 • 上一篇    下一篇

中国东部典型森林生态系统蒸散及其组分变异规律研究

路倩倩1, 2, 何洪林1, *, 朱先进1, 于贵瑞1, 王辉民1, 张军辉3, 闫俊华4   

  1. 1. 中国科学院 地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京 100101;
    2. 中国科学院大学,北京 100049;
    3. 中国科学院 沈阳应用生态研究所,沈阳 110016;
    4. 中国科学院 华南植物园,广州 510650
  • 收稿日期:2014-08-18 修回日期:2015-01-29 出版日期:2015-09-15 发布日期:2015-09-15
  • 通讯作者: 何洪林,男,湖南人,研究员,博士。E-mail: hehl@igsnrr.ac.cn
  • 作者简介:路倩倩(1989- ),女,山东德州人,硕士研究生,主要从事生态信息学研究。E-mail:luqq.12s@igsnrr.ac.cn
  • 基金资助:

    中国科学院战略性先导科技专项(XDA05050600); 国家科技支撑计划(2013BAC03B00)

Study on the Variations of Forest Evapotranspiration and Its Components in Eastern China

LU Qian-qian1, 2, HE Hong-lin1, ZHU Xian-jin1, YU Gui-rui1, WANG Hui-min1, ZHANG Jun-hui3, YAN Jun-hua4   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institution of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    4. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
  • Received:2014-08-18 Revised:2015-01-29 Online:2015-09-15 Published:2015-09-15

摘要:

森林蒸散包括植被蒸腾、土壤蒸发、冠层截留蒸发三个组分,在陆地生态系统水分循环及能量流动研究中占有重要地位。论文基于Priestley-Taylor Jet Propulsion Laboratory Model (PT-JPL)模型,估算温带针阔混交林、人工常绿针叶林、亚热带常绿阔叶林三个典型森林生态系统2003—2008年蒸散(组分);在模拟结果基础上揭示了蒸散(组分)的季节变异规律及主控因子。结果表明:①PT-JPL模型在中国东部森林生态系统蒸散及其组分估算中具有较高的稳定性和可靠性;②蒸散(组分)季节变化特征明显,不同森林生态系统类型变化规律差异较小,但主控因子存在较大差异:温带针阔混交林蒸散和植被蒸腾季节变异主要由净辐射和增强植被指数(EVI)共同控制,而亚热带人工常绿针叶林和亚热带常绿阔叶林主要受净辐射影响;EVI和饱和水汽压差(VPD)是土壤蒸发季节变异的主控因子,截留蒸发的季节变化则主要受VPD影响。

Abstract:

The study of forest evapotranspiration (ET) occupies a significant position in the research of water and energy cycles, owing to the important role of forest ecosystem in the entire terrestrial ecosystem. In this paper, based on Priestley-Taylor Jet Propulsion Laboratory Model (PT-JPL), we simulated ET and its components for the temperate mixed broadleaf-coniferous forest, the artificial evergreen coniferous forest and the subtropical evergreen broad-leaved forest in eastern China from 2003 to 2008, and then validated the accuracy of PT-JPL model with flux data. In addition, seasonal variation characteristics and controlling factors of ET and its components were also studied. The results indicate that PT-JPL model is robust and accurate for estimating forest ET and its components. There are obvious seasonal variation of ET and its components in all three forest ecosystems, with similar variation trends. However, the main controlling factors dominating the seasonal variation of forest ET and its components vary in different forest ecosystems. The seasonal variation of ET and its components for temperate mixed broadleaf-coniferous forest are mainly controlled by net radiation and VPD, while those for artificial evergreen coniferous forest and subtropical evergreen broad-leaved forest are net radiation only. As for seasonal variation of soil evaporation, EVI and VPD are the major contributors in all three forest ecosystems, but when referring to the seasonal change of interception evaporation, VPD is considered as the dominant factor.

中图分类号: 

  • S715.4