Turnipseed Ozone/SO2/NOx/CO trace gas data

Investigator: Andrew Turnipseed, NCAR/ACD
turnip@ucar.edu
Date: 1/27/2012

Filename:  TurnipseedROMBAS_O3.csv (comma delimited)

Data Interval:  5 min. averages
Initial Start time of file:  July 1, 2011, 0:00:00  (MST)
Measurements are made from 6 inlets at different heights.
Measurements are made from each inlet for 5 min., cycling through all 6 inlets over a 30 min. period.
These are denoted in the column labeled "z".  Heights are:
z1 = 1.5 m
z2 = 5.0 m
z3 = 8.5 m
z4 = 12.0 m
z5 = 17.7 m
z6 = 25.1 m
Missing data = -9999

Columns:
Start_sec:	Beginning of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
End_sec: 	End of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Mid_sec:	Midpoint of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Date:		MM/dd/YY, 
Time:		hh:mm:ss, Beginning of 5 min. period (MST)
Day of Year:	decimal day, Beginning of 5 min. period (MST)
O3:		Ozone mixing ratio, ppbv
z:		Inlet height, m

Instrumentation:
2B Techonologies Model 205 UV-absorption spectrometer 	

Sampling Notes: Each inlet was sampled for 5 min. (6 inlets - 30 min. for complete profile)
starting with the lowest inlet at the beginning of the 30 min. period.

Calibrations:  The O3 instrument was automatically zeroed every 6 hours using 
scrubbed zero grade air.  It was run side-by-side with in the lab and field with a
second ozone monitor both prior to and following the ROMBAS experiment and found 
to be in excellent agreement.   
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Turnipseed NOx profile Data Instructions

Investigator: Andrew Turnipseed, NCAR/ACD
turnip@ucar.edu
Date: 9/20/2012

Filename:  TurnipseedROMBAS_NOx.csv (comma delimited)

Data Interval:  5 min. averages
Missing data = -9999

Columns:
Start_sec:	Beginning of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
End_sec: 	End of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Mid_sec:	Midpoint of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Date:		MM/dd/YY, 
Time:		hh:mm:ss, Beginning of 5 min. period (MST)
Day of Year:	decimal day, Beginning of 5 min. period (MST)
NO:		nitric oxide mixing ratio, ppbv
NO2:		nitrogen dioxide mixing ratio, ppbv
NOx:		NO + NO2 mixing ratio, ppbv
z:		Inlet height, m
S flag:		Profiling system = 0,  Separate line = 1.(see explanation below)*

Instrumentation:
NO monitor:  Ecophysics CLD88Y
NO2 Photolysis:  Droplet Technology Blue light converter (modified).
NO2 converson efficiency = 0.42 (measured during exp.)	

Sampling methods: 
Typically, measurements were made from 6 inlets at different heights.
Measurements were made from each inlet for 5 min., cycling through all 6 inlets over a 30 min. period.  These are denoted in the column labeled "z".  
Heights are:  1.5 m, 5.0 m, 8.5 m, 12.0 m, 17.7 m and 25.1 m.
During each 5 min. period the single channel analyzer cycled between measuring NO directly (first 2 minutes),  NO + NO2 (thru the photolysis cell, 2nd 2 minutes) and through a Molybdenum converter (last minute).  

*Due to inadequate cooling - the analyzer periodically shut down during ROMBAS which caused data loss on all instruments connected to the profiling system.  To minimize overall data loss, the NOx instrument was often run separate from the profiling manifold on its own inlet line.  The height for this was separate inlet was at 2.5 m.  The final column (S flag) is given to give a quick indication of when the NOx instrument was running on this separate inlet line.  One consequence of 
this separate inlet was that its proximity to trees/branches resulted in less air flow surrounding this actual intake.  So the NOx concentrations appeared much more variable when sampling from this inlet due to the wind intermittency. 

Calibrations:  The NO instrument was automatically calibrated every 6 hours.  Offsets were measured by diverting the sample flow through a pre-reaction chamber where it reacts with a large excess of ozone.  The instrument was then calibrated via standard addition of a small flow of NO standard (~ 3 sccm, 10 ppmv in Nitrogen, Scott-Marrin) to the main sample flow (~ 3 sLpm).   

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Turnipseed SO2 profile Data Instructions

Investigator: Andrew Turnipseed, NCAR/ACD
turnip@ucar.edu
Date: 1/25/2012

Filename:  TurnipseedROMBAS_So2.csv (comma delimited)

Data Interval:  5 min. averages
Initial Start time of file:  July 1, 2011, 0:00:00  (MST)
Measurements are made from 6 inlets at different heights.
Measurements are made from each inlet for 5 min., cycling through all 6 inlets over a 30 min. period.
These are denoted in the column labeled "z".  Heights are:
z1 = 1.5 m
z2 = 5.0 m
z3 = 8.5 m
z4 = 12.0 m
z5 = 17.7 m
z6 = 25.1 m
Missing data = -9999

Columns:
Start_sec:	Beginning of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
End_sec: 	End of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Mid_sec:	Midpoint of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Date:		MM/dd/YY, 
Time:		hh:mm:ss, Beginning of 5 min. period (MST)
Day of Year:	decimal day, Beginning of 5 min. period (MST)
SO2:		sulfur dioxide mixing ratio, ppbv
z:		Inlet height, m

Instrumentation:
Thermo Environmental Model 43C-TLE 	

Sampling Notes: Each inlet was sampled for 5 min. (6 inlets - 30 min. for complete profile)
starting with the lowest inlet at the beginning of the 30 min. period.

Calibrations:  The SO2 instrument was automatically zeroed every 6 hours using 
scrubbed zero grade air.  The instrument was then calibrated via standard addition 
of a small flow SO2 standard (~ 3 sccm, 13 ppmv in Nitrogen, Scott-Marrin) to the 
main sample flow (~ 3 sLpm).   
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Turnipseed CO2 and H2O profile Data Instructions

Investigator: Andrew Turnipseed, NCAR/ACD
turnip@ucar.edu
Date: 1/25/2012

Filename:  TurnipseedROMBAS_CO2_H2O.csv (comma delimited)

Data Interval:  5 min. averages
Initial Start time of file:  July 1, 2011, 0:00:00  (MST)
Measurements are made from 6 inlets at different heights.
Measurements are made from each inlet for 5 min., cycling through all 6 inlets over a 30 min. period.
These are denoted in the column labeled "z".  Heights are:
z1 = 1.5 m
z2 = 5.0 m
z3 = 8.5 m
z4 = 12.0 m
z5 = 17.7 m
z6 = 25.1 m
Missing data = -9999

Columns:
Start_sec:	Beginning of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
End_sec: 	End of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Mid_sec:	Midpoint of 5 min. period  (seconds since July 1, 2011, 0:00:00 MST)
Date:		MM/dd/YY, 
Time:		hh:mm:ss, Beginning of 5 min. period (MST)
Day of Year:	decimal day, Beginning of 5 min. period (MST)
CO2:		carbon dioxide mixing ratio, ppmv
H2O:		Water vapor mixing ratio, mmol/mol
z:		Inlet height, m

Instrumentation:
Licor Li-6262 	

Sampling Notes: Each inlet was sampled for 5 min. (6 inlets - 30 min. for complete profile)
starting with the lowest inlet at the beginning of the 30 min. period.

Calibrations:  Both the CO2 and H2O channels were automatically zeroed every 6 hours using 
scrubbed zero grad air.  CO2 was calibrated every 6 hours by adding a 400 ppmv CO2/air 
standard from Scott-Marrin.  H2O was not automatically calibrated, but was scaled using 
meteorological data (T, RH, P) from the WXT520 sensors on the tower at 4 heights.  