NDRC: NV Desert FACE Facility: CO2 Treatment Statistics

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Nevada desert face facility

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 CO₂ concentration 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 CO₂ concentration 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