A set of long-term global energy and mass exchange products from AVHRR/MODIS data and a process-based model

Abstract:

The exchange of energy and mass across the land-atmosphere interface is a key to monitor global climate change. Since 1980s, intensive efforts have been made to model and map carbon and water fluxes by means of land surface models and remote sensing techniques. Recently, remote sensing data based land surface models have been developed and applied at site, regional and global scales. However, these coupling models mainly focused on short-term land surface characterization, whereas long-term dynamics is more useful for global climate change research. In this study, we derived a set of long-term energy and mass exchange products (1981-2014) from the Advanced Very High Resolution Radiometer (AVHRR) and the Moderate-resolution Imaging Spectroradiometer (MODIS) data using a process-based model, the Breathing Earth System Simulator (BESS). We evaluated products using flux tower measured data, and made comparison to other long-term carbon and water fluxes datasets derived from land surface models or remote sensing techniques. The spatial and temporal patterns of carbon and water fluxes were also investigated.