Global Earth Observation and Monitoring
of the atmosphere


Terrain below site

Description:Percentage of terrain within 10 km radius from the site that lies at lower altitudes than the site itself based on GLOBE 30'' (arc-seconds) topography data. For an elevated site this percentage will be large (close to 100 %), while for sites within valleys or basins this percentage will be small. For sites within homogeneous terrain the percentage will be 50 %. Such sites can be assumed to be more representative for a larger area, while for sites in more complex terrain small circulation systems might influence the surface concentration field and introduce large heterogeneities.

Please contact Stephan Henne in case of any questions.