Seasonal change of H2O and CO2 flux linked with withering progress

In canopy scale, the relation of seasonal change between amount of chlorophyll, vegetation index by remote sensing, evapo-transpiration flux, and carbon dioxide flux was investigated. It was found that reduction of evapo-transpiration flux and the increase in carbon dioxide flux begin in early stages of the amount reduction of chlorophyll. Moreover, it also became clear that reduction of the amount of chlorophyll can be evaluated by the vegetation index. These results of Tsukuba and Tibetan Plateau observation were the same.