BEACHON Turbulence/Energy/CO2 flux Data
Location:  Manitou Experimental Forest, Chemistry Tower
Investigator:  Andrew Turnipseed
Fileaname Format:  NCAR_Flux_2010mmdd_V1.txt
		(tab-delimited, ASCI text files)

Sensors, Models and Locations:  
Sonic Anemometer:	z=25.3 m, CSAT-3 (Campbell Scientific)
H2O/CO2:		z=25.3 m (inlet), Li7000 (Licor) 
Data Logging:  		Laptop/Labview
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Time Interval:  15 minute averages
Time Tag: Mid-point of the 15 min. period.
Missing/invalid data:  -9999
Other comments: CO2 and H2O fluxes are made with closed-path Licor.  Air is brought down
to the sensor through a 3/8" Teflon tube at a flow rate of ~ 25 Lpm.  Time series for H2O and CO2 
are aligned with the wind velocities via cross correlation before flux calculation. Wind 
velocities are rotated to mean wind coordinates before flux calculation. Electrical "spikes" have 
been removed from all time series prior to flux calculation (typically spikes are only apparent 
during precipitation events). Fluxes have not been corrected for axial diffusion within the inlet 
tubing or other spectral corrections.  Data have also not been screened for conditions of 
stationarity or other tests of flux validity in this data version.  

Data Columns:
Column:
1.	Date:mm/dd/2010
2.	hour:minute:sec (midpoint of 1 min. average)
3.	Decimal Day
4.	Wind Speed, m/s (scalar-avg'd wind speed)
5.	Wind Direction, degrees from North
6.	Wind Speed, m/s (vector-avg'd)
7.	Friction Velocity (u*), m/s
8. 	Stability Parameter (z/L, L=Obukhov length), unitless
9.	Standard deviation of vertical wind velocity (sigma(w)), m/s
10.	Sensible heat flux (H), W/m^2
11.	Latent heat flux (LE), W/m^2
12.	CO2 flux (F(co2), micromoles m-2 s-1
13. 	Water vapor flux, mmol m-2 s-1   
14.	CO2 mixing ratio, ppmv
15.	H2O mixing ratio, mmol/mol
16.	Virtual temperature, oC