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Table 1

Details of INFLUX in-situ tower sites. Measurements are listed for the period of focus for this paper (2013). The CO2 only sites were upgraded to measure both CO2 and CH4 in November 2014. DOI: https://doi.org/10.1525/elementa.127.t1

SiteMeasurementsInstallation dateLat
(deg N)
Long
(deg W)
Sample height(s)
(m AGL)
Known nearby sourcesPredominant land-cover
(in 1 km2 surrounding tower)

 
*Site 01 – Background CO2/CO/CH4/Flasks 9/2010 39.5805 86.4207 10/40/121 Power plant 10 km to the S Wooded, sparse residential, agriculture 
*Site 02 – Downwind edge CO2/CO/CH4/Flasks 9/2010 39.7978 86.0183 10/40/136 I–70 200 m to the N Residential, light commercial 
*Site 03 – Downtown CO2/CO/Flasks 6/2012 39.7833 86.1651 10/20/40/54 I65–S 10 m to the SW; I65–N 40 m to the NE; power plant 2 km to the S Commercial, residential, 2 km N of city center 
*Site 04 – South Side CO2 8/2012 39.5927 86.0991 60  Light commercial, residential, agriculture 
*Site 05 – NorthWest corner CO2/CO/Flasks 3/2012 39.8949 86.2028 125  Wooded, residential, apartment buildings 
Site 06 – NorthEast corner CO2 7/2013 39.9201 86.0280 39 I–69 500 m to the NW; I–465 4 km to the SW Light commercial, residential 
*Site 07 – West Side CO2 3/2012 39.7739 86.2724 58 I465 200 m to the W Residential, apartment buildings, light commercial 
Site 08 – NorthEast CO2/CO/CH4 5/2013 40.0411 85.9734 41 Power plant 6 km to the N Agricultural, wooded 
*Site 09 – Downwind/Background CO2/CO/Flasks 3/2012 39.8627N 85.7448W 10/40/70/130  Agricultural, golf course, wooded 
*Site 10 – Downtown – South CO2/CH4 3/2012 39.7181N 86.1436W 40 Landfill and power plant 6 km to the W Warehouses, residential, light commercial 
*Site 11 – Downtown – North CO2/CH4 4/2013 39.8403N 86.1763W 130  Residential, university buildings, wooded, athletic fields, pond 
*Site 12 – decommissioned 4/2013 CO2 8/2012 39.7637N 86.0403W 40 4-lane roads 400m to the W and 1 km to the N; I465 800 m to the E Residential, light commercial 
*Site 13 – South East CO2/CH4 4/2013 39.7173N 85.9417W 87  Agriculture, residential 
SiteMeasurementsInstallation dateLat
(deg N)
Long
(deg W)
Sample height(s)
(m AGL)
Known nearby sourcesPredominant land-cover
(in 1 km2 surrounding tower)

 
*Site 01 – Background CO2/CO/CH4/Flasks 9/2010 39.5805 86.4207 10/40/121 Power plant 10 km to the S Wooded, sparse residential, agriculture 
*Site 02 – Downwind edge CO2/CO/CH4/Flasks 9/2010 39.7978 86.0183 10/40/136 I–70 200 m to the N Residential, light commercial 
*Site 03 – Downtown CO2/CO/Flasks 6/2012 39.7833 86.1651 10/20/40/54 I65–S 10 m to the SW; I65–N 40 m to the NE; power plant 2 km to the S Commercial, residential, 2 km N of city center 
*Site 04 – South Side CO2 8/2012 39.5927 86.0991 60  Light commercial, residential, agriculture 
*Site 05 – NorthWest corner CO2/CO/Flasks 3/2012 39.8949 86.2028 125  Wooded, residential, apartment buildings 
Site 06 – NorthEast corner CO2 7/2013 39.9201 86.0280 39 I–69 500 m to the NW; I–465 4 km to the SW Light commercial, residential 
*Site 07 – West Side CO2 3/2012 39.7739 86.2724 58 I465 200 m to the W Residential, apartment buildings, light commercial 
Site 08 – NorthEast CO2/CO/CH4 5/2013 40.0411 85.9734 41 Power plant 6 km to the N Agricultural, wooded 
*Site 09 – Downwind/Background CO2/CO/Flasks 3/2012 39.8627N 85.7448W 10/40/70/130  Agricultural, golf course, wooded 
*Site 10 – Downtown – South CO2/CH4 3/2012 39.7181N 86.1436W 40 Landfill and power plant 6 km to the W Warehouses, residential, light commercial 
*Site 11 – Downtown – North CO2/CH4 4/2013 39.8403N 86.1763W 130  Residential, university buildings, wooded, athletic fields, pond 
*Site 12 – decommissioned 4/2013 CO2 8/2012 39.7637N 86.0403W 40 4-lane roads 400m to the W and 1 km to the N; I465 800 m to the E Residential, light commercial 
*Site 13 – South East CO2/CH4 4/2013 39.7173N 85.9417W 87  Agriculture, residential 

*Results from these towers are presented in this manuscript.

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