The nugget effect is like the random noise. It's just the small scale variability that you can't estimate with your large scale variability model. The nugget effect is the measurement error. This might be useful: Statistics or geostatistics? Sampling error or nugget effect?

The nugget effect is like the random noise. It's just the small scale variability that you can't estimate with your large scale variability model. The nugget effect is made of the measurement error and of the microscope variation, two types of variances. This might be useful: Statistics or geostatistics? Sampling error or nugget effect?

Thanks to @whuber for his comment

The nugget effect is like the random noise. It's just the small scale variability that you can't estimate with your large scale variability model.

The nugget effect is like the random noise. It's just the small scale variability that you can't estimate with your large scale variability model. The nugget effect is the measurement error. This might be useful: Statistics or geostatistics? Sampling error or nugget effect?