[R-sig-Geo] krige.bayes output

[giovanna jona lasinio]

Dear all,
I'm running a bayesian kriging using krige.bayes in the geoR library. 
I'm using a linux machine with R 2.4. I'm running a chain of annual 
surfaces estimation and I'm using every year's output to build the prior 
for the next one through the function post2prior (always, geoR library). 
My predictive distribution is back-transformed (Box-Cox) from Gaussian 
(log transformation).

My problem concerns the krige.bayes output, in the predictive list I 
find an element named uncertainty of the same length as my surface. I 
was not able to find any explanation of what is in it searching the help 
and the mailing list archive.
Does anyone know what  is it?

Best
Giovanna Jona Lasinio