Global and net radiation validation

The graphs below show the Energy Balance Monitoring System radiation validation results for Zhengzhou (China), as carried out in the scope of the CEWBMS project. In graph 1, overcast days are left out in order to reduce the scatter in the graph and make it easier to interpret. In graph 2 and 3, distinction is made between clear and cloudy days. The uncertainty of the ground measurements (obtained from meteorological stations) is estimated less than 5% for the global radiation and 20% for net radiation.

graph 1

graph 2

graph 3