t - Regional Climate Group

Other meteorological variables
Condition the statistics of the daily variables (typically maximum/
minimum temperatures and solar radiation) on occurrence of
precipitation (a proxy for other processes such as cloud cover).
In the classic WGEN model, multiple variables are modelled
simultaneously with auto-regression:
z
() [ ] ( ) [ ] ()
t
=
A z
t
- 1
+
Where z(t) are normally distributed values for today’s nonprecipitation
variables, z(t-1) are corresponding values for the previous day, and [A]
and [B] are K × K matrices of parameters, and ε(t) is white-noise forcing.
B
ε
t
Göteborg University http://www.gvc2.gu.se/rcg Regional Climate Group
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