摘要
植物物候是指植物生长过程中呈现出的季节性现象,一般与植物所处的气候与环境变化密切相关。植被动力学模式研究的物候主要表现为叶面积指数变化,直接影响陆气间的碳通量与水热交换,同时影响物种间的竞争,从而间接地影响生态系统的结构组成。按照建模方法的差别,目前模式中使用的物候方案可分为使用卫星观测资料的物候方案、基于物候——气候关系的统计模型和基于叶碳平衡(周转)的动力学模型三大类。将植物物候分为物候期的触发和物候期叶片的发育过程两部分,分别对国际上广泛使用的八种全球植被动力学模式进行分类描述,对比其优缺点。最后探讨了植被动力学模式中物候方案的进一步发展方向。
Plant phenology represents the periodical phenomena of individual plants in response to seasonal and interannual variations in climate and environment. In dynamic global vegetation models（DGVMs）, the impacts of phenology on carbon flux and exchanges of water and heat between the land and atmosphere are considered through the changes in leaf area index（LAI）. Phenology schemes in DGVMs and land surface models can be divided into three approaches： The use of satellite observational data, statistical models based on the relationship between phenology and climate, and dynamic models based on the carbon balance. In this paper, we divide plant phenology into two processes—the trigger of leaf onset/offset, and variation of leaf area throughout the phenological period—and then describe the general phenology schemes of these two processes applied in eight popular DGVMs. Finally, we provide perspective on the further development of phenology schemes in DGVMs.
出处
《气候与环境研究》
CSCD
北大核心
2015年第6期726-734,共9页
Climatic and Environmental Research
基金
中国科学院战略性先导科技专项XDA05110103
国家自然科学青年基金项目41305098
国家高技术研究发展计划项目2009AA122105
国家国际科技合作专项项目2011DFG23450
关键词
物候方案
全球植被动力学模式
气候变化
Phenology scheme
Dynamic Global Vegetation Model（DGVM）
Climate change
