Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Experimental semivariogram (dots) with permissible spherical model estimates (violet curve) at a) threshold zk > 1.5 MJ hm-2 h-1 and b) at threshold zk > 3.0 MJ hm-2 h-1 (b). Units of the semivariance γ are multiplied by 10.
