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

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

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

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

Measurement setup Increased mobility Larger analysis area – app 200 km2/night

Data Aquisition CCD camera - 250 s exposition GPS device

Raw Data

Data Analysis Image processing Data interpolation

Analysied area app 900km2

Comparison with last year’s results 2002. 2003. Difference:

3D view of all measurements 2002. 2003. Difference:

Sky Glow decrement by radius city boundary

Model of Sky Glow propagation Propagation model: I=I0/rq r < 1km q=0.020±0.007 Rq=35% r > 1km q=0.57±0.05 Rq=8.77%

Sky Glow – Population dependancy Sky Glow distribution Population distribution

Sky Glow Local Monitoring group website: www.fizika.org/sglm Ivica Crljenica, University of Zagreb icrljen@fizika.org