论文部分内容阅读
地表过程对全球变化的响应和反馈是地球系统科学研究的核心课题之一,目前的研究多关注全球变化对地表过程的影响,而地表动态过程对地表生物物理过程及气候的反馈研究较少。系统认识地表物候动态对生物物理过程及气候的反馈对深化地球系统科学研究有着重要的意义。本文从农业物候动态的事实、农业物候动态在陆面过程模型中的参数化表达、农业物候动态对地表生物物理过程及气候的反馈等方面进行综述,发现在气候变化和管理措施影响下,以种植期和灌浆期为代表的农业物候期发生了显著的规律性变化;耦合农业物候动态,改善了模型对地表动态过程、生物物理过程和大气过程的数字化表达;农业物候变化对地表净辐射、潜热、感热、反照率和气温、降水、环流等过程产生了影响,并表现出以地表能量分配为主的气候反馈机理。针对农业物候动态对地表生物物理过程及气候效应的时空重要性,需要继续开展以下方面的工作:(1)加强全球变化对地表物候动态的影响及其反馈的综合研究;(2)不同光谱波段地表反射率与农业物候动态的关系研究;(3)农业物候动态引起的作物生理学特征变化在地表生物物理过程中的贡献;(4)重视不同气候区物候动态对气候反馈效应的差异。
The response and feedback of surface processes to global changes are one of the core issues in the scientific research of the Earth System. The current research focuses more on the impact of global changes on the surface processes. However, there are few researches on the surface bio-physical processes and climate feedbacks. Systematic understanding of the dynamics of surface phenology Dynamic feedback of biophysical processes and climate is of great importance for deepening the Earth system science research. In this paper, we summarize the dynamics of agricultural phenology, the parametric expression of the dynamic state of agricultural phenology in the land surface process model, the dynamic changes of the surface biophysical processes and the climate of agricultural phenology, and find that under the influence of climate change and management measures, The phenological changes during the phenophase represented by the planting and filling stages were significant and regular. Coupling the dynamics of agricultural phenology improved the digital expression of the dynamic process, the biophysical process and the atmospheric process of the model. The changes of the net radiation, Latent heat, sensible heat, albedo and temperature, precipitation, circulation and other processes have an impact, and showed that the distribution of surface energy-based climate feedback mechanism. In view of the spatial and temporal importance of agro-phenology dynamics to the surface biophysical processes and climate effects, the following work needs to be done: (1) to enhance the global impact on the dynamics of surface phenology and its feedback; (2) (3) the contribution of changes in crop physiology to crop biophysical processes due to the dynamics of agro-phenology; and (4) the importance of climate change in different climatic regions on climate feedback.