CO2 Treatment Statistics

CO2 Treatment Statistics

Performance metrics of the NDFF CO2 treatments from 1997 to 2007. The column "% Fumigation Scheduled" is the percentage of time that the FACE system was operating when air temperature was above and wind speed was below their respective thresholds (daytime solar altitude threshold added November 2006). "[CO2] During Fumigation" is the average CO2concentration in µmol/mol (± standard deviation) during the time periods when the fumigation system was operating. "% Fumigation Total" is the percentage of all time that the FACE system was fumigating. "[CO2] Total" is the average CO2 concentration in µmol/mol (± standard deviation) during all time periods. "Ambient Air [CO2] is the average CO2concentration of the ambient air in µmol/mol (± standard deviation).

Notes:

*Results for 2007 are for the period before 1 July 2007 when CO2 fumigation ended.
**Results for 1997 are for the period after 28 April 1997 when fumigation was initiated.

 
Year
% Fumigation Scheduled
[CO2] During Fumigation
% Fumigation Total
[CO2] Total
Ambient Air [CO2]
2007*
99.8 549.3 ± 37.7 47.3 463.6 ± 84.8 379.0 ± 5.1
2006
99.7 550.2 ± 34.2 76.5 510.4 ± 74.6 376.0 ± 6.7
2005
98.1 550.2 ± 32.8 81.7 520.7 ± 63.2 376.0 ± 7.4
2004
99.2 549.7 ± 31.6 81.5 518.2 ± 63.6 373.1 ± 6.6
2003
98.4 549.7 ± 31.3 80.6 517.2 ± 62.5 369.4 ± 6.7
2002
98.8 550.2 ± 30.4 78.1 512.3 ± 66.7 367.3 ± 8.8
2001
98.8 550.3 ± 32.2 81.2 517.5 ± 64.7 380.5 ± 10.8
2000
99.5 550.6 ± 34.7 82.0 519.2 ± 64.9 381.3 ± 13.7
1999
99.8 550.1 ± 33.7 79.3 514.8 ± 65.5 378.1 ± 11.8
1998
98.6 550.0 ± 33.8 78.1 513.9 ± 63.8 377.7 ± 10.9
1997**
98.7 550.1 ± 34.9 78.8 512.2 ± 72.5 371.2 ± 9.7
 

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