Tab. 2 Parameters of PM2.5 maps

Linear regression model + interpolation of residuals Annual average
rural areas urban background
c (constant) 2.2 0.0
a1 (rural map of PM10) 0.68  
a2 (urban map of PM10)   0.77
range [km] 60 80
nugget 0 0
partial sill 4 6

 

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