Skip to main content
. Author manuscript; available in PMC: 2014 Jan 22.
Published in final edited form as: Agric For Meteorol. 2009 Feb;149(2):291–302. doi: 10.1016/j.agrformet.2008.08.011

Table 1.

Effect of quality control on data coverage (percentage). The various quality control steps have been applied sequentially as they are listed below. Quality control based on absolute concentration and flux limits has been summarised as “hard flags”, γ refers to the third angle of the 3D coordinate rotation (Kaimal and Finnigan, 1994). Refer to the text for further details.

CP-λE OP-λE CP-FC OP-FC
Missing values 13.7 16.6 13.7 16.4
|γ| > 10° 3.4 3.4 3.4 3.4
CP IRGA pressure 0.1 0.0 0.1 0.0
Hard flags 3.2 19.6 4.0 17.2
Stationarity test 35.6 18.9 27.8 21.3
Integral turbulence test 7.5 8.0 9.2 9.0
Footprint test 0.4 0.7 0.6 0.7
Data gaps 63.9 67.2 58.8 68.0
Valid data 36.1 32.8 41.2 32.0