Description: | See below for details of reprocessing that was completed on 20150121. Original DQR
category: 4 (Red, Incorrect)
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Failure of soil heat flow sensor #5 at E9, Ashton, KS resulted in incorrect
data values for 6 fields for much of the period of time listed above. The
soil heat flow values from #5 were so large (in the absolute) that it
deleteriosly affected the soil heat flux average and the sensible and
latent heat fluxes. The fields affected were:
30 minute: shf5, c_shf5, g5, ave_shf, e, h
15 minute: mv_hft5.
I list only the 30 minute times affected below; it can be assumed that the
15 minute value contained in the half hour are incorrect. Sensor #5 was
replaced at 1545 GMT on June 28. Old S/N 923029, new S/N 923092. Half hour
1600 GMT is missing due to having to reload the CR10 program with a new shf5
calibration. Sensible and latent heat fluxes can be recomputed by averaging
soil heat flow sensors 1-4; use the following equations:
ave_shf = (g1 + g2 + g3 + g4)/4
e = -(q +ave_shf)/(1 + bowen)
h = e * bowen,
where g is total soil heat flow, q is net radiation, and bowen is Bowen
Ratio.
Affected half hours:
Date Times (GMT)
6/15 2130, 2300, 2330
6/16 0000, 0030, 2130-2330
6/17 0000-1530, 1900, 1930
6/18 0200-2330
6/19 All
6/20 All
6/21 All
6/22 All
6/23 All
6/24 All
6/25 0000-1930, 2300, 2330
6/26 All
6/27 All
6/28 0000-1600 |