On the 23rd of July an adjustment was made to the DZT_COEFF in SMUinit.xml from +0.11 to +0.08. In this report I will be checking the effects of this change.

AUGUST 2009 : RxA+HARP

T(air/mean) - Z (first)

T(air/mean) - Z (night) - 17:00 - 08:00

In contrast to the previous report (20090719), the slope now appears positive. It is puzzling how a small adjustment of just 0.03 can produce such dramatic changes, taking the slope from -0.03 to +0.045. This is not a result that can accounted for by an error in the sign convention either. This will need further investigation to determine the exact nature if the temperature algorithm ... look out for future reports.