The Spatial Distribution Of The Actual Terrain Of Potential Solar Radiation

Solar radiation is the most important energy source on earth , its time and space distribution on earth restricts the climate system's movment, also is the most important gene in the climate system's form and evolvement . With the complex terrain and multiplicity condition on underlying surface , we get great disparity of solar radiation in China , and it also affect our country's climate's multiplicity and complexity . So it's very important for research our country's climate's form and resource to research our country's radiation distribution character.With reference to calculation methods of solar radiation within domestic and abroad literature and with the help of our country's DEM (with its resolution is 1 km x 1 km), we build a new model for potential solar radiation calculation combining with PCI Geomatica's platform . In the calculation , hypothesis is that insofar one clear day in more than one year as the biggest value of solar radiation of one day in many years is defined as potential value of daily global solar radiation , we also consider the infection of the slope , aspect and its geometry relations affect on solar radiation . We calculate potential solar radiation which maybe useful for research the distribution of solar energy and build large-scale grid database of our country's solar radiation.