The use of high-performance and high-throughput computing for the fertilization of digital earth and global change studies

The study of global climate change seeks to understand:(1)the components of the Earth’s varying environmental system,with a particular focus on climate;(2)how these components interact to determine present conditions;(3)the factors driving these components;(4)the history of global change and the projection of future change;and(5)how knowledge about global environmental variability and change can be applied to present-day and future decision-making.This paper addresses the use of high-performance computing and high-throughput computing for a global change study on the Digital Earth(DE)platform.Two aspects of the use of high-performance computing(HPC)/high-throughput computing(HTC)on the DE platform are the processing of data from all sources,especially Earth observation data,and the simulation of global change models.The HPC/HTC is an essential and efficient tool for the processing of vast amounts of global data,especially Earth observation data.The current trend involves running complex global climate models using potentially millions of personal computers to achieve better climate change predictions than would ever be possible using the supercomputers currently available to scientists.