| Description: | The Temperature portion of the right T/RH probe indicated too high a
temperature for nearly 11 months. I twice placed work requests to have the
probe replaced, but no spares were available. Spares recently became
available and I placed a new work request to have the probe changed. The
replacement occurred on 18 June 1997; this fixed the problem. The main
results of the high temperatures were probe top and bottom temperatures
(used only for the calculation of vapor pressure) and vapor pressures that
were too large. Furthermore, this caused latent heat flux to be reported
to be too large, and therefore sensible heat flux was reported to be too
small. Recalculation of the fluxes using thermocouple temperatures to
calculate vapor pressure would be quite time consuming and would have to
assume that the thermocouple temperature and probe temperature were nearly
the same.
The EBBR procedures have been changed to include comparison of the
thermocouple and probe temperatures to make it easier for the site
operators to detect this condition.
The data affected (and thus incorrect) includes:
15 minute: rr_thum_r
30 minute: thum_top, thum_bot, vp_top, vp_bot, e, h, bowen. |