Light Pollution Analysis of the Istrian Peninsula Ivica Crljenica, University of Zagreb ICPS 2003, Odense - Denmark

Light Pollution is all the light that doesn’t illumiates what it should It is mainly produced by improper public lightning

Zagreb, 11:54 PM Los Angeles, 00:26 AM Light Pollution examples in the world… …and in our country

Light pollution in Europe in 1997… …and the prevision for 2025.

Measurement setup Increased mobility Larger analysis area – app 200 km 2 /night

CCD camera s exposition GPS device Data Aquisition

Raw Data

Image processing Data Analysis Data interpolation

Analysied area app 900km 2

Comparison with last year’s results Difference:

3D view of all measurements Difference:

Sky Glow decrement by radius city boundary

Model of Sky Glow propagation Propagation model: I=I 0 /r q r < 1km q=0.020±0.007 R q =35% r > 1km q=0.57±0.05 R q =8.77%

Population distribution Sky Glow – Population dependancy Sky Glow distribution

Sky Glow Local Monitoring group website: Ivica Crljenica, University of Zagreb