Viewpoints and techniques for terrestrial carbon cycling study largely depend on the temporal and spatial scales of ecological and micrometeorological phenomena that we focus on. In order to understand and to predict the dynamic relationships between micrometeorological conditions and ecosystem behavior in broad temporal and spatial scales under climate change, multidisciplinary efforts by combining ecophysiology, micrometeorology, optical remote sensing and simulation models are strongly required. "Satellite Ecology" concept has been established to assess the ecosystem structure and functions across broad temporal and spatial scales. By focusing on cool-temperate forest ecosystems in 'Takayama' super site, Japan, we will show (1) inter-annual variation in leaf and canopy photosynthetic productivity, (2) canopy-level response to micrometeorological conditions in a mountainous landscape, (3) a new approach to up-scale leaf and canopy optical property for remote sensing of canopy property, and (4) CO2 flux from plot to national land scale by simulation models. [collaborated with, S. Nagai, T.M. Saitoh, H.M. Noda, K. Murakami, A. Ito, T. Sasai, K.N. Nasahara]