Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 80)

Appendix C. Output Variables
TABLE C-2. Values stored in table flux
Compile
Switch Variable Name Units Description
wind_speed m∙s -1 Average wind speed
wind_vector_mag m∙s -1 Magnitude of average wind vector
wind_dir_sonic degrees direction of average wind vector
stdev_wind_dir degrees Standard deviation of wind direction
wind_dir_compass degrees Wind direction in compass coordinates
Tc_mean ºC Average of the humidity-corrected sonic
temperature
amb_press_mean kPa Average ambient pressure
rho_a_mean kg∙m -3 Average density of humid air
Td_cell_mean ºC Average dewpoint temperature in the sample cell
Td_ambient_mean ºC Average dewpoint temperature at ambient pressure
flux_samples Number of samples included in flux calculations
Ts_stdev ºC Standard deviation of sonic temperature Ts
Ts_Ux_cov ºC m∙s -1 Covariance of T
s
and U
x
Ts_Uy_cov ºC m∙s -1 Covariance of T
s
and U
y
Ts_Uz_cov ºC m∙s -1 Covariance of T
s
and U
z
Ux_stdev m∙s -1 Standard deviation of U
x
Ux_Uy_cov m 2 ∙s -2 Covariance of U
x
and U
y
Ux_Uz_cov m 2 ∙s -2 Covariance of U
x
and U
z
Uy_stdev m∙s -1 Standard deviation of U
y
Uy_Uz_cov m 2 ∙s -2 Covariance of U
y
and U
z
Uz_stdev m∙s -1 Standard deviation of U
z
CO2_stdev µmol mol -1 Standard deviation of CO
2
CO2_Ux_cov µmol∙mol -1 m∙s -1 Covariance of CO
2
and U
x
CO2_Uy_cov µmol∙mol -1 m∙s -1 Covariance of CO
2
and U
y
CO2_Uz_cov µmol∙mol -1 m∙s -1 Covariance of CO
2
and U
z
H2O_stdev mmol∙mol -1 Standard deviation of H
2
O
H2O_Ux_cov mmol∙mol -1 m∙s -1 Covariance of H
2
O and U
x
H2O_Uy_cov mmol∙mol -1 m∙s -1 Covariance of H
2
O and U
y
H2O_Uz_cov mmol∙mol -1 m∙s -1 Covariance of H
2
O and U
z
Tc_stdev ºC Standard deviation of humidity-corrected sonic
temperature T
c
Tc_Ux_cov °C m∙s -1 Covariance of T
c
and U
x
Tc_Uy_cov °C m∙s -1 Covariance of T
c
and U
y
Tc_Uz_cov °C m∙s -1 Covariance of T
c
and U
z
Ux_Avg m∙s -1 Average of U
x
Uy_Avg m∙s -1 Average of U
y
Uz_Avg m∙s -1 Average of U
z
Ts_Avg ºC Average of T
s
diag_sonic_Avg Average of diag_sonic
CO2_Avg µmol∙mol -1 Average of CO
2
H2O_Avg mmol∙mol -1 Average of H
2
O
diag_irga_Avg Average of diag_irga
cell_tmpr_Avg ºC Average cell temperature
cell_press_Avg kPa Average cell pressure
CO2_signal_Avg Average CO
2
signal
H2O_signal_Avg Average H
2
O signal
diff_press_Avg kPa Average differential pressure
C-4