Dear Hong,

Your approach to replace simulation results by measured soil temperatures
sounds interesting. But, how do you do this?
If I understood you correctly, in a second step you want to use the measured
soil temperature to model temperature at depths below (and above?) the
measurement point? And you want to use the DSSAT's regular procedure?
Again, all quite interesting, and I and probably others here would like to
know how you do that - seems to be impossible without major changes in the
code of the soil temperature module.

Best regards,
Rolf

___________________________________________________________
Rolf Sommer
CIMMYT (International Maize and Wheat Improvement Center)
Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
Tel. +52 (55) 5804 2004  Ext. 2128
Fax +52 (55) 5804 7558/59
www.cimmyt.org
___________________________________________________________



-----Original Message-----
From: Hong Wang [mailto:[log in to unmask]]
Sent: Thursday, March 18, 2004 08:42
To: [log in to unmask]
Subject: Soil temperature and moisture corrections

Dear colleagues,

I am testing a greenhouse gas emission model. Because this model
simulates soil temperature and moisture unsatisfactorily and we actually
have those measurements at one depth, I am trying to replace simulated
numbers by measurements and then to see if we can improve the simulation
of greenhouse gases.

My question is how we can correct soil temperature and moisture at
other depths? I assume that the model's simulation on the relationships
between different layers in soil temperature and moisture is sound, so I
can adjust temperatures and moisture at other depths using the
relationships. I am wondering if there is a better approach?

Thank you.


Hong

Hong Wang  Ph.D.
Research Scientist
Semiarid Prairie Agricultural Research Centre
Agriculture & Agri-Food Canada
P.O. Box 1030
Swift Current, Saskatchewan
Canada S9H 3X2
Tel: (306)778-7288
Fax: (306)773-9123