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